Model FD800DL & FD800DL+

Corrosion and Flaw Gauge

Operating Instructions

enThis product meets the Electromagnetic Compatibility Directive.
The product is Class A, Group 1 ISM equipment according to CISPR 11.
Group 1 ISM product: A product in which there is intentionally generated and/or usedconductively coupled radio-frequency energy which is necessary for the internalfunctioning of the equipment itself.
Class A product are suitable for use in all establishments other than domestic and those directly connected
to a low voltage power supply network which supplies buildings used for domestic purposes.
Note: In the close presence of some radio transmitters, erroneous readings may be given. If this occurs tests
should be repeated at another location.
These operating instructions are available for download on our website www.elcometerNDT.com
The following trademark is a registered trademark of Elcometer Limited, Edge Lane, Manchester, M43 6BU.
United Kingdom:

Material Safety Data Sheets for the ultrasonic couplant supplied with the FD800DL & FD800DL+ andavailable as an accessory, are available to download via our website:
Elcometer Ultrasonic Couplant Material Safety Data Sheet :www.elcometer.com/images/MSDS/elcometer_ultrasonic_couplant.pdf
www.elcometer.com/images/MSDS/elcometer_ultrasonic_couplant_blue.pdf
Elcometer Ultrasonic Couplant (High Temperature) Material Safety Data Sheet :www.elcometer.com/images/MSDS/elcometer_ultrasonic_couplant_hi_temp.pdf
All other trademarks acknowledged. © Elcometer Limited. 2014. All rights reserved. No part of thisdocument may be reproduced, transmitted, transcribed, stored (in a retrieval system or otherwise) ortranslated into any language, in any form or by any means (electronic, mechanical, magnetic, optical,
manual or otherwise) without the prior written permission of Elcometer Limited.
TMA-0592 Issue 02
Text with cover: 25384

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enContents
SECTION : 1 ABOUT YOUR GAUGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 The Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Selecting Gauge Operating Mode (Thickness Gauge / Flaw Detector) . . . . . . . . . 8
5 The Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SECTION : 2 THICKNESS GAUGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6 The Measurement Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7 Measurement - Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8 Setting up the Thickness Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
9 Measurement - Taking Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10 Gates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
11 ThruPaint™ measurement technique . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
12 Measurement - Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
13 Transducers for Thickness Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SECTION : 3 FLAW DETECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
14 The Measurement Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
15 Setting Up The Flaw Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
16 Measurement - Detecting Flaws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
17 Adjusting the Waveform display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
18 Gates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
19 TRIG - Trigonometry Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
20 AWS - Weld Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
21 TCG - Time Corrected Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
22 DAC - Distance Amplitude Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
23 DGS (AVG) Distance, Gain, Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
24 Measurement - Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
25 Transducers for Flaw Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
SECTION : 4 FUNCTIONS & FEATURES COMMON TO ALL GAUGES . . . . . . . . . . . 56
26 Measurement - Recording your Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
27 Gauge Setups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
28 Data Transfer Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
29 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
30 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
31 Technical Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
32 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
33 Spares & Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
34 Condition and Preparation of Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
35 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
36 Sound Velocities of Common Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
37 The Menu Commands - Thickness Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
38 The Menu Commands - Flaw Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

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Thank you for purchasing this Elcometer NDT product. Welcome to Elcometer NDT.
The FD800DL/FD800DL+ Corrosion and Flaw Gauge is a world beating product. With the purchaseof this gauge you now have access to the worldwide service and support network of Elcometer. For
more information visit our website at www.elcometer.com

SECTION : 1 ABOUT YOUR GAUGE
1 INTRODUCTION
The FD800DL/FD800DL+ Corrosion and Flaw Gauge are combined corrosion gauges and flaw
detectors that measures with extreme versatility.
•

When the GAUGE function is set to THICKNESS GAUGE, the FD800DL/FD800DL+ becomesa Corrosion Gauge which has the ability to measure coatings and material thickness
simultaneously while maintaining the ability to locate pits, flaws and defects in the material.
Based on the same operating principles as SONAR, the FD800DL/FD800DL+ Corrosion and
Flaw Gauge is capable of measuring the thickness of various materials with accuracy as highas ± 1% or ± 0.1 millimetres (± 0.005 inches) whichever is the greater.

•

When the GAUGE function is set to FLAW DETECTOR, the gauge becomes a Flaw Detector
which has the ability to detect the size and position of flaws and to differentiate between flaw
types in various materials and welded joints.

The principal advantage of ultrasonic thickness measurement over traditional methods is thatultrasonic measurements can be performed with access to only one side of the material being
measured.
The gauges include a data-logging (memory) facility which allows readings and waveforms to be
stored in batches before being downloaded to a computer.
1.1 STANDARDSYour gauge can be used in accordance with the following Standards and test methods:
ASTM E 797, EN 14127 and EN 15317.
1.2 WHAT THIS BOX CONTAINS
FD800DL or FD800DL+, Ultrasonic Couplant 120 ml (4 fl oz), Carrying case, Test Certificate,Operating instructions, Universal charger, Mains lead (UK, EUR & US), RS232 cable and USB toserial converter.
Note: The box does not include a transducer; these must be ordered separately. To order atransducer, contact Elcometer NDT or your local Elcometer NDT supplier.
1.3 FEATURES OF THE GAUGE•

Two gauges in one: Corrosion (thickness) gauge and Flaw Detector•

Wide range of thickness measurement modes: Pulse-Echo, Echo-Echo, Echo-Echo Verify,
Coating Only, Pulse-Echo with Temperature Compensation, and Pulse-Echo with Coating•

Automatic probe zero, probe recognition, and temperature compensation.

•

Adjustable gain settings.

•

Stores up to 64 custom setups for specific applications.

•High speed scan mode of up to 50 readings per second.

•

Audible/visual alarm with high and low limit settings.

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•

Differential mode for QC inspections.

•

Colour display.

•

Radio frequency RF and RECT A-Scan displays.

•

Time based B-Scan display for cross section material scans (thickness gauge).

•

Measurement data storage formats: Alpha numeric grid and sequential with auto identifier.
Data can be downloaded to a computer for analysis and storage.

To maximise the benefits of your new Elcometer NDT gauge, please take some time to readthese Operating Instructions. Do not hesitate to contact Elcometer NDT or your Elcometer
NDT supplier if you have any questions.
1.4 PACKAGING
The gauge is packed inside its carrying case within a cardboard box. Please ensure that the
packaging is disposed of in an environmentally sensitive manner. Consult your Local Environmental
Authority for further guidance.

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2 THE KEYPAD
Activates the primary menu structure containing 15 menu tab groups. These tabgroups then contain sub menu items, or functions. The sub menu items areorganised in tab groups according to how closely they are related to theindividual tab group names.

MENU

Clears a measurement from a grid or sequential log files cell location or set
obstruct, and backspace in an Alpha Edit Box. If you have already saved ameasurement and waveform to a cell location, use this key to clear themeasurement at any time. In Flaw mode, clears a DAC reference point used togenerate a curve.

CLEAR

Press to start taking measurements. The readings are displayed on the screen.
Also used to navigate forward through the hot menu.

MEAS

Press to confirm a change or selection. When in measurement mode, the gauge
displays the DIGITS. If your gauge is displaying a grid log, this key toggles anadvance to row number option.

OK

In the MENU, MEAS, and EDIT functions this key acts as a back or escapeESC

function. If your gauge is displaying a grid or sequential log, the

ESC

key

toggles the display options; RF, +RECT, -RECT, RECTFW, B-SCAN or DIGITS(display options depend upon gauge operating mode - Thickness Gauge / Flaw
Detector).
+

+

ENTER

+

GAIN

ENTER

MULTI
MODE

In the menus, scrolls through the menus, increases/decreases values, andtoggles functions. Left wheel up/down scrolls through HOT MENU. LEFT/RIGHT
changes menu list in HOT MENU. In Flaw Detector mode right wheel UP/DOWN
changes GAIN VALUE. LEFT/RIGHT changes value/option in highlighted HOT
MENU option.
In MENU left wheel LEFT/RIGHT scrolls through menu tabs. UP/DOWN scrolls
through menu screen. Right wheel LEFT/RIGHT scrolls through highlighted
options.
In menus this key activates list and edit boxes, displays and saves
measurements to grid or sequential files locations.
While making measurements, goes to Store Data Menu.
In Thickness mode, press to select measurement mode menu.

Switches the gauge ON or OFF.
Note: The gauge will automatically switch off when idle for 5 minutes. All current
settings are automatically saved prior to switching off.
DATA

5This key activates the DATA tab in the main menu. Takes the user directly to
DATA menu when no log set up or stored data in log when log open.

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The STORE key displays the current log/grid open in split screen mode.
STORE

PEAK

FREEZEThe PEAK key is a feature used only in the FLAW detector portion of the gauge
and is not used in the THICKNESS gauge.
The FREEZE key is used to freeze the display for evaluation/review of thecurrent display. It can also be used in conjunction with the CAPTURE feature tosave the current display to a .tif (tagged image) graphic file that can be opened
using any graphic viewer.

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3 GETTING STARTED
3.1 FITTING BATTERIESYour gauge is powered via thebuilt-in Lithium Ion battery pack,however, emergency back-up
batteries - 6 x 1.5V Alkaline 12V
AA Nicad cells can be fitted.
When the battery voltage is low
the entire display will start toflash. When this occurs thebatteries should be replaced.
To fit or replace batteries:
1. Unscrew battery
compartment cover.

AC
CHG

PEAK

DATA

FREEZE

STORE

MULTI
MODE

CLEAR

1
ALARM
2

2. Referring to battery polarity
instructions on rear of gauge,
insert batteries.

+

+

MEAS

3. Replace battery
compartment cover.

MENU
GAIN

+

ENTER

OK

ESC

The built-in Lithium Ion battery
pack is charged using the
Universal charger and mains
leads supplied.
Note: Remove the batteries from the gauge if it is to remain unused for a long period of time. This
will prevent damage to the gauge in the event of malfunction of the batteries.
3.2 CHOOSING THE TRANSDUCER
When you purchased your gauge you should have also purchased a suitable transducer for yourapplication. If you have not yet done so, to help you identify the correct transducer type, contact
Elcometer NDT, your local Elcometer NDT supplier or visit www.elcometerNDT.com
3.3 FITTING THE TRANSDUCER
The transducer transmits and receives ultrasonic soundwaves that the gauge uses to calculate the thickness of thematerial being measured.
The dual element transducer connects to the gauge via theattached cable, and two coaxial connectors. When usingtransducers manufactured by Elcometer, the orientation of
the dual coaxial connectors is not critical; either plug may befitted to either socket.
Single element transducers have separate cables and are connected to the gauge using the socket
further away from the battery cap - as indicated on the label on the rear of the gauge.
3.4 SWITCHING ON/OFF
To switch on or off, press the on/off key.

The gauge will switch off automatically after 5 minutes of inactivity.
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4 SELECTING GAUGE OPERATING MODE (THICKNESS GAUGE / FLAWDETECTOR)Your gauge combines a thickness gauge and a flaw detector in one unit. To select operating mode:
1. Select MENU/UTIL/GAUGE and press ENTER.
2. Use UP and DOWN to select THICKNESS GAUGE, FLAW DETECTOR or REQUEST.
3. Press OK to confirm.
4. Press MEAS to return to the measurement screen.
Note: When set to REQUEST, the gauge will ask which mode is required whenever it is switched on.

5 THE MENUSYour gauge has two menu systems:•

Full menu - displays all the functions and settings of the gauge (see also page 58 andpage 73.)•

Hot menu - displays a sub-set of functions and settings related to taking measurements.

5.1 FULL MENU
Press MENU once to access the menus. Thenpress MENU or RIGHT button on left wheel toscroll to the right along the sub menu bar and
ESC or LEFT button on left wheel to scroll left tothe sub menu you want.

Use UP and DOWN on the left wheel to scroll to
the function you want within the sub menu.

8enThen press enter or use LEFT and RIGHT on
the right wheel to scroll to the option you want.

5.2 HOT KEY MENU
Press MEAS once to access the measurement
screen. The hot menu functions are displayedon the right of the reading screen.

Press MEAS to scroll down along the hot menufunctions and ESC to scroll up until the function
you want is highlighted, or use the UP/DOWN on
the LEFT wheel.

Use LEFT or RIGHT on RIGHT wheel to adjust
the value of the function.

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Alternatively, adjust values by pressing ENTER
then use UP, DOWN, LEFT and RIGHT oneither wheel to scroll and adjust values. Press
OK when finished.
5.3 SELECTING MENU LANGUAGE
The menus can be displayed in English,
Spanish, German and French.
1. Select MENU/SET/LANGUAGE.
2. Use LEFT and RIGHT on the right wheel toscroll the language options.
3. Once the desired language is displayed,press MEAS to return to the measurement
screen.
5.4 ADJUSTING THE DISPLAYYour gauge has an AMOLED display which you can customise to your preferences:
CHANGING THE DISPLAY BRIGHTNESS
To adjust the display brightness:
1. Select MENU/DISP/BRIGHTNESS.
2. Use LEFT and RIGHT on the right wheel to scroll to the value you require. The scale is anarbitrary scale from 0 to 20.
3. Press MEAS to return to the measurement screen.
CHANGING THE DISPLAY COLOUR SCHEME
Your gauge includes a range of display colour schemes. You can select one colour scheme fromthis range:
1. Select MENU/DISP/COLORS.
2. Press ENTER to access choose colour screen.
The Choose Colour screen shows the range of colour schemes available. The current colour
scheme is highlighted.
3. Use UP and DOWN to scroll to the required colour scheme.
4. Press ENTER to select the colour scheme.
5. Press OK to confirm your selection and return to the menu screen, or ESC to cancel.
6. Alternatively, use the LEFT and RIGHT on the right wheel to scroll through available colour
schemes.
7. Press MEAS to return to the measurement screen.
CHANGING THE DISPLAY DIM TIMEYour gauge includes a DIM function which can be used to extend battery life. The DIM function isused to set the time delay in seconds between the last measurement and an automatic reductionin screen brightness that can save battery power.
Note: This function does not override the preset 5 minute idle power off feature.
To set the DIM time:
1. Select MENU/DISP/DIM.
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2. Use LEFT and RIGHT on right wheel to scroll to the value you require.
3. Press MEAS to return to the measurement screen.
CHANGING THE RECT WAVEFORM TYPE
The RECT waveform can be displayed FILLED or
UNFILLED, as illustrated (screenshots taken withgauge set to FLAW mode).
To adjust the RECT WAVE setting:
1. Select MENU/DISP/VIEW and RECT. Then
select RECT WAVE.
2. Use LEFT and RIGHT on the right wheel toscroll to FILLED or OUTLINE.
3. Press MEAS to return to the measurement
screen.
CHANGING THE DETECT MARK ON THE
WAVEFORM

Unfilled

The type of detect mark on the waveform can be
adjusted (NONE, LINE, DOTS or NONE), as
illustrated. The detect mark is useful as it provides
a clear indication to the user as to where a detect
is taking place and what the thickness reading
displayed in the top right of the thickness gauge
display is derived from. The thickness reading
shown by the flaw detector when "OK" is pressedis also shown with the detect mark.

FilledTo adjust the DETECT MARK setting:

None

Line

Dots

Box

1. Select MENU/DISP/DETECT MARK.
2. Use LEFT and RIGHT on the right wheel to locate the type of DETECT MARK.
3. Press MEAS to return to the measurement screen.
5.5 FRONT PANEL ALARM LIGHTS
The green light illuminates when the alarm mode is active and the measurement is within limits.
The red light illuminates when the alarm mode is active and the measurement is outside limits.

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SECTION : 2 THICKNESS GAUGE
6 THE MEASUREMENT SCREEN
When the GAUGE function is set to THICKNESS GAUGE, the FD800DL/FD800DL+ Corrosion and
Flaw Gauge becomes a corrosion gauge that measures with extreme versatility. It has the ability tomeasure coatings and material thickness simultaneously while maintaining the ability to locate pits,
flaws and defects in the material.
Based on the same operating principles as SONAR, the FD800DL/FD800DL+ Corrosion and Flaw
Gauge is capable of measuring the thickness of various materials with accuracy as high as 0.01
millimetres (0.001 inches). The principal advantage of ultrasonic measurement over traditional
methods is that ultrasonic measurements can be performed with access to only one side of thematerial being measured.
Your gauge has four types of measurement screen:•

A-Scan Waveform, RF•

A-Scan Waveform, RECT•

B-Scan•DigitsA-SCANRF

A-SCAN
RECT

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B-SCAN

DIGITSTo see the measurement screen, press MEAS.
To select which measurement screen to use, press MENU/DISP/VIEW and then select RF, RECT,
B-SCAN or DIGITS.
6.1 ITEMS COMMON TO ALL MEASUREMENT SCREENS
A number of items are common to all the measurement screens:

A

C

B

D

E
H

F

G
A

Repeatability/Stability
Indicator

This indicator is used in conjunction with the digital thickness
values displayed. When all the vertical bars are fully illuminatedand the last digit on the digital thickness value is stable, yourgauge is reliably measuring the value.

B

Battery Icon

Remaining battery life.

C

Material Thickness
Value/
Material Velocity Value

The thickness or sound velocity of the material under thetransducer (type depends upon measurement view).

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D

Units

The current measurement units (Metric/English).

E

Feature Status Bar

Indicates the features currently enabled and in use:•

Measurement Mode (P-E, PECT, PETP, E-E, E-EV, CT)•

Differential Mode (ON/OFF)•High Speed Scan Mode (ON/OFF)•

Alarm Mode (ON/OFF/AUDIBLE)•

Gain Setting (Displays the set value)See “Measurement - Modes” on page 18 etc for further
information.
F

Measurement View Area RF, RECT, B-SCAN or DIGITS view area.

G

Measurement Labels
Bar

Displays the viewable range and are based on the values of
DELAY/B-START and RANGE/B-DEPTH.

H

Hot Menu

The hot menu contains a selection of the most commonly used
options, allowing you to conveniently adjust these to your needs
while the graphical display is active.

6.2 RF A-SCAN MEASUREMENT SCREEN
The RF view shows the full sound wave as received by the gauge. The vertical axis indicates theamplitude of the received wave and the horizontal position indicates the time it is received, which isconverted into thickness units using the material velocity.
The point on the scan that is being used to calculate the digital thickness reading is displayed as
the vertical dashed line (see section 9 on gates). The RF screen is used for gauge setup prior toinspection.
1/2 Wave
Full Screen
Wave Only
1/2 Digits

6.3 RECT A-SCAN MEASUREMENT SCREEN
The rectified view shows only half of the waveform, either the positive or negative half dependingon the POLARITY selected.
The RECT display is the preferred view for flaw and pit inspections.

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6.4 B-SCAN MEASUREMENT SCREEN
The time-based B-Scan display provides a cross sectional view of the material being tested. In thisexample, the top, or accessible side of the material is represented as 0.00 mm, and the bottom, orblind surface at 15.2 mm.
This mode is used when you need to inspect the profile of the blind surface. It can also be a usefulview when scanning for pits and flaws.
The B-Scan display is equipped with a scan bar representing the overall thickness. The scan bar
gives the user a visual indication when a flaw or defect passed over during the scan process.
If you are scanning a pipe, for instance, and pass over a pit during the process, the scan bar willquickly deflect and alert you to go back and search for the defect.

B-SCAN

DIGITS

6.5 DIGITS MEASUREMENT SCREEN
The digits display shows the thickness as a value using a large font size. This view is used typicallywhen the gauge is being used as a basic thickness gauge. The digits display includes the samescan bar as the B-Scan display.

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6.6 CHANGING THE VIEWABLE RANGEIn RF view, RECT view and B-SCAN view, if the waveform around the detection point is not visibleon the display, use one of the following methods to adjust the viewable range of the display:•

When in RF view or RECT view, change the values of the DELAY and RANGE functions until
the measurement falls inside the viewable range of the display - see instructions below.

•

When in B-SCAN view, change the values of the B-START and B-DEPTH functions until themeasurement falls inside the viewable range of the display. B-START is the equivalent of
DELAY and B-DEPTH is the equivalent of RANGE and the instructions for changing thesevalues is identical to those for DELAY and RANGE - see instructions below.

•

Use the Auto Find function - see “Auto Find” on page 27.

Note: Even if the waveform is outside of the viewable range of the display, a measurement can betaken and viewed using the DIGITS view.
DELAY AND RANGEThe Delay is the thickness value from which the A-Scan display starts on the left of the screen. The
Range is used to adjust the value at the right side of the screen. Using these two parameters allows
the user to zoom in to a specific measurement range and increase the level of detail on the display.
For example, if a wall thickness was nominally 25mm and an operator was assessing for corrosion
on this wall they might set the delay to 10mm and the range to 20mm to give a view from 10 to 30mm
depth.
B-Start and B-Depth are analogous to Delay and Range for a B-Scan display respectively.
Delay and Range or B-Start and B-Depth may be adjusted in the hot menu or in the DISP sectionof the main menu.
ADJUSTING DELAY AND RANGE (OR B-START AND B-DEPTH)
The quickest way to adjust DELAY and RANGE is directly from the hot menu. Alternatively, adjust
the values using the menus:
1. Select MENU/DISP/DELAY or RANGE and adjust using the LEFT and RIGHT on the rightwheel or use the DIGITS EDIT BOX.
2. Press MEAS to return to the measurement.
6.7 ADJUSTING B-SCAN SCROLL SPEED
The scrolling speed of the time-based B-Scan can be adjusted to suit your measurement
techniques.
To adjust the scroll speed:
1. Select MENU/DISP/BSCAN SPEED.
2. Choose a value between 1 and 10 (10 is fastest) using the right wheel or the DIGITS EDIT
BOX.
3. Press MEAS to return to the measurement screen.
6.8 GAIN
The gain (the amplitude of the transmitted pulse) can be adjusted to suit a variety of applications.
To obtain valid readings the gain must be set to the correct level to give reliable return echoes:•

Too much gain may result in erroneous measurements by detecting noise rather than thematerial back wall itself.

•

Not enough gain may result in intermittent detection. It may also result in lack of detection oninternal flaws, pits, or porosity.
16

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The gain setting on your gauge can be compared to the volume control of a home stereo system.
If you turn it up too much you cannot hear the music clearly. If it is turned down too much, you cannot
hear it at all.
Note: When the echo-echo ThruPaint™ measurement mode is selected, the manual gain feature isdisabled and greyed out in the menu items. In this mode, your gauge switches to an automatic gainmode (AGC) that optimises the gain setting automatically.
Your gauge has been optimised for a medium gain setting and for the majority of applications it canbe used at this setting. Some applications however may require lower or higher gain settings:•

Lower values might be necessary for noisy or granular cast materials. If the reading becomessporadic and will not settle down or resolve on a thickness value.

•

Higher values may be necessary when trying to measure a material that is hard to penetrate(due to the material type, or the overall thickness of the material) and when locating fine pits or
flaws. In these instances, increase the gain until the stability indicator reports a goodmeasurement.

TO ADJUST THE GAIN VALUE
The quickest way to adjust GAIN is directly on the right wheel using the UP and DOWN functions.
Alternatively, adjust the value using the menus:
1. Select MENU/TUNE/GAIN.
2. Adjust to suit the measurement application.
3. Press MEAS to return to the measurement screen.
6.9 THRESHOLD
The threshold is the level of signal amplitude required to trigger a gate and activate the digitalthickness reading. Increasing the threshold value decreases the sensitivity of the gauge as a more
powerful signal is required to trigger the gate. For example on the A-scan display it may be clearthat there is a flaw in the material but the thickness reading is not taking this into account; lowering
the threshold has the effect of increasing the sensitivity of the gauge to a level that the flaw can bedetected. More information on thresholds can be found on the Elcometer NDT Knowledge Centre
on www.elcometerNDT.com
TO ADJUST THE THRESHOLD VALUE
The quickest way to adjust a threshold value is directly from the hot menu. Alternatively, adjust thevalues using the menus:
1. Press MENU/GT1/THRESHOLD1 (THRESHOLD2 and THRESHOLD3 are accessed andadjusted in the same way from the menus for GT2 and GT3 respectively).
2. Adjust to suit the measurement application.
3. Press MEAS to return to the measurement screen.
6.10 GATESYour gauge is equipped with gates which control the time measurement process.
For instructions on how to use gates, see “Gates” on page 26.

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7 MEASUREMENT - MODES
Your gauge has two basic measurement modes, Pulse-Echo and Echo-Echo, plus a number ofvariations on these modes for specific measurement tasks.
If an auto identified transducer is fitted to the gauge the appropriate mode will be automatically set.
To select measurement mode manually, press MULTI MODE and then select the mode you want
to use from the list displayed.
Note: The availability of the modes depends upon the type of transducer fitted to the gauge.
7.1 PULSE-ECHO MODE (P-E), COATING OFF
The standard measurement mode providing maximum sensitivity. This general purpose mode
should be used for corrosion and flaw inspections and will measure the total thickness of a material.
7.2 PULSE-ECHO COATING MODE (PECT), COATING ON
Special mode that allows measurement of coating thickness and material thickness at the sametime while retaining the capability to detect flaws.
7.3 PULSE-ECHO TEMPERATURE COMPENSATED MODE (PETP), TEMP COMP
This is a custom mode that combines pulse-echo and electronic zero techniques to automaticallyadjust for temperature changes in the transducer as a result of an increasing/decreasing
temperature gradient in the test material.
Note: Rough surface conditions can have an effect on the overall accuracy in this mode. If thesurface condition is in question, the pulse-echo mode should be used in conjunction with performing
an off block automatic zero as the temperature gradient changes.
7.4 ECHO-ECHO MODE (E-E), THRUPAINT™
This special mode allows the user to measure the material thickness of a substrate underneath a
coating while ignoring the coating thickness by using two echoes from the material back wall. Thismode is useful when the coating thickness makes up a sizeable proportion of a material, but has
the impact of reducing sensitivity so should not be used in pit and flaw inspections.
7.5 ECHO-ECHO VERIFY MODE (E-EV), THRU VERIFYThis mode uses a third echo to double check the measurement, increasing the reliability of ameasurement even further from the E-E mode.
7.6 COATING ONLY MODE (CT), COATING ONLY
Note: Similar to the PECT mode but reports the coating thickness only.

CT
PECT

EEV

CT
EE

PE

PE

IE

EE

EEV

PECT

18

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8 SETTING UP THE THICKNESS GAUGE
8.1 AUTOMATIC TRANSDUCER IDENTIFICATION
If using a coating thickness transducer, the gauge will
ask you to confirm the transducer type.

CONFIRM

1. Press OK to use the identified transducer.
Note: Always select OK to use the identified
transducer type.

3/16IN - 5.0MHZ COAT

2. Ensure that the wearface is clean and free of any
couplant or debris then press OK to perform a probe
zero.

PROBE IDENTIFIED

3. Calibrate the gauge - see:••“Calibrating - for a Material” on page 22 and“Calibrating - for a Coating” on page 24.

OK
8.2 SELECTING THE TRANSDUCER TYPEMANUALLY
Note: If not using a coating thickness transducer, you willneed to select a transducer type from the predefined list
so that your gauge may recall specific transducer
properties.

ESC

PROBE TYPE

Follow these steps to select your transducer type:
1. When the CONFIRM screen displays the‘UNIDENTIFIED PROBE TYPE’ message, press OK
to display the predefined list of transducer types (bydiameter and frequency on the left wheel).
2. Using UP or DOWN, scroll through the transducer
list until the correct type is highlighted and thenpress ENTER.
3. Press OK to overwrite the existing transducer typewith the newly selected transducer type.
4. Your gauge will automatically advance to the Zero Probe procedure.

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8.3 TRANSDUCER - ZEROING
Setting the zero point for the transducer is important in
the same way that it is important for a mechanicalmicrometer. Zeroing takes into account slightvariations in the manufacturing process for maximum
accuracy. If zeroing is not carried out correctly, themeasurements taken by the gauge will be in error bysome fixed value.
Your gauge has two zero probe options:•

Off Block or Automatic Probe Zero - The gauge
conducts an electronic zero without the need for azero block (All measurement modes).

•On Block or Manual Probe Zero - Requires useof the zero block on the top of the gauge (Pulse toecho mode only).

THROUGH COAT
ON/OFF - REMOVECOUPLANT FROMPROBE AND PRESSOK KEY TO PERFORM
THE ZEROOK

ESC

For most applications the Off Block Zero will be
sufficient, however if it is found the gauge linearity is off and extreme accuracy is required an On
Block Zero should be conducted followed by an Off Block Zero. This will adjust and eliminate any
error.
These options may be accessed from MENU/PRB.
8.4 OFF BLOCK ZERO (AUTOMATIC PROBE ZERO)
1. When the ZERO PROBE screen is displayed, remove all couplant from the face of thetransducer and check that the wearface of the transducer is clean and free of any debris.
2. Press OK (or ESC to cancel).
When the automatic probe zero is completed the measurement screen is displayed.
Your gauge should now be calibrated.
8.5 ON BLOCK ZERO (MANUAL PROBE ZERO)
When this zero probe option is selected a warning screen is displayed informing you that you mustzero the probe before taking measurements.
1. Press MEAS to display the measurement screen.
2. Remove all couplant from the face of the transducer and check that the wearface is clean andfree of any debris.

20

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3. Apply a drop of couplanton the transducer andplace the transducer insteady contact with theprobe zero disk (battery
cover)
Note: Disregard thevalue displayed; it is notimportant. What is
important is accurately
performing these steps
to ensure reliability ofthe zero calculation.

AC
CHG

PEAK

DATA

FREEZE

STORE

MULTI
MODE

CLEAR

1
ALARM
2

+

+

MEAS
ENTER

MENU
GAIN

+

4. Press MENU, scroll to
the PRB menu, scroll to
the
ZERO
PROBE
function and then press
ENTER.

OKESC

The ZERO PROBE
screen is displayed.
5. UP and DOWN toggle coating on/off.
6. Press OK (or ESC to cancel).
When the manual probe zero is completed the measurement screen is displayed.
7. Remove the transducer from the probe zero disk.
8.6 TRANSDUCER - ZEROING FOR COATING ONLY MEASUREMENTS
Your gauge features an additional zero coating feature for use when measuring coatings to a highaccuracy is required.
Note: For this procedure, a coating transducer must be fitted to the gauge.

21

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1. Apply a drop of couplant on
the transducer and place thetransducer in steady contact
with the probe zero disk
(battery cover) and obtain asteady reading - see
illustration.
Note: Disregard the value
displayed; it is not important.
What is important isaccurately performing thesesteps to ensure reliability ofthe zero calculation.

AC
CHG

PEAK

DATA

FREEZE

STORE

MULTI
MODE

CLEAR

1
ALARM

A confirmation screen isdisplayed.
3. Press OK
cancel).

(or

ESC

2

+

+

MEAS
ENTER

MENU
GAIN

+

2. Select
MENU/PRB/ZERO
COATING and then press
ENTER.

OK

ESC

to

When the zero coating process is completed the measurement screen is displayed.
4. Press MULTI MODE, scroll to COATING ON (PECT) and press ENTER.
The measurement screen is displayed.
You can now take readings.
8.7 CALIBRATING - FOR A MATERIAL
Sound travels through different materials at different speeds, and in order to measure thesematerials accurately the correct sound velocity must be programmed into the gauge. Your gauge
features 3 different ways of doing this.
Known material calibration - The material to be measured is selected from a list in the gauge.
Known velocity calibration - If the material sound velocity is known this may be entered manually.
Known Thickness Calibration - A sample of the material to be inspected is measured using
alternative means and then used to calibrate the gauge.
•

One Point calibration is the simplest and most commonly used calibration procedure with best
performance over large measurement ranges.

•

Two Point calibration uses two samples of different thicknesses, with enhanced accuracy
over small ranges close to the sample thicknesses used.

For the highest measurement accuracy use the known thickness calibration as this takes into
account variation in material composition, temperature and a variety of other factors.
KNOWN MATERIAL CALIBRATION
If the material velocity is unknown, and a sample thickness cannot be taken from the material, you
can choose a material type from a list stored in the gauge. For each material stored in the list there
is a corresponding velocity value.
Note: These velocities will not always be an exact representation of the material being tested. Usethese values only if a close approximation is acceptable.

22

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1. Select MENU/CAL/MAT.
2. Press ENTER to display the list of material types.
3. Scroll through the material list until the appropriate material is highlighted, using the
UP/DOWN on the left hand wheel.
4. Press ENTER to choose the material type.
5. Press OK to confirm the material type.
6. Press MEAS to return to the measurement screen.
KNOWN VELOCITY CALIBRATION
If the material velocity is known, you can enter the velocity value directly into the gauge. A list of thesound velocities of common materials is given at the end of this instruction manual.
1. Press MENU/CAL/VELOCITY.
2. Press ENTER to display the Digits Edit Box.
3. Adjust to match the material velocity.
4. Press OK.
5. Press MEAS to return to the measurement screen.
KNOWN THICKNESS CALIBRATION
If the sound velocity of a material is unknown, a sample with one or two known thicknesses can beused to determine the sound velocity.
Note: Although the gauge has a ThruPaint™/coating feature, known thickness calibration must be
performed on material with the paint or coating removed.
ONE-POINT CALIBRATION - The one point calibration option is most suited for linearity over large
ranges. You should always calibrate on high side of the intended measurement range. For example,
if the measurement range is 2.54 mm to 25.4 mm (.100" to 1.0"), you should calibrate on a known
thickness sample close to 25.4 mm (1.0").
Note: Before you start this calibration procedure, perform a probe zero.
1. Apply a drop of couplant on the transducer and place the transducer in steady contact with thesample or the material being tested. Be sure that the reading is stable and the repeatability
indicator, in the top left corner of the display, is fully lit and stable.
2. Select MENU/CAL/MATLIPT.
3. Press ENTER to display the Digits Edit Box.
4. Adjust to match the material thickness.
5. Press OK to calculate the velocity and return to the measurement screen, or ESC to cancel.
Note: Place the transducer back on the calibration point. The thickness reading should now matchthe known thickness but if outside tolerance, repeat the steps above.
TWO-POINT CALIBRATION - For improved accuracy over a smaller measurement range, conduct
one-point calibration followed by a two-point calibration. For example, if the measurement range is
2.03 mm to 6.35 mm (.080" to 0.250"), perform a one point calibration on a known thickness sample
close to 6.35 mm (.250"), followed by a two-point calibration close to 2.03 mm (.080").
Note: Before you start this calibration procedure, perform a probe zero.

23

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Two - Point calibration
1. Conduct a one point calibration routine as described previously in this section. You should
conduct this routine at the high end of the measurement range.
2. Repeat the routine with another sample at the low end of the measurement range, except thistime enter the thickness into the MATL 2PT area in the CAL menu.
Note: CHECK YOUR CALIBRATION. Place the transducer back on both calibration points. If the
thickness is out of tolerance repeat the steps above.
8.8 CALIBRATING - FOR A COATINGYour gauge comes pre-set with a coating velocity of 2159 m s-1 that has been found to be a good
approximation of coatings found in the field.
Accuracy may be improved by calibrating for the coating in the same way that a material may becalibrated for, using either coating velocity or known coating thickness calibration.
•

In PECT mode a one point calibration is required.

•

In CT mode a 2 - point calibration is required.

KNOWN COATING VELOCITY
If the coating velocity is known, you can enter the velocity value into your gauge.
1. Press MENU/CAL/COATING VEL.
2. Press ENTER to display the Digits Edit Box.
3. Adjust to match the coating velocity.
4. Press OK.
5. Press MEAS to return to the measurement screen.
KNOWN COATING THICKNESSOne Point Calibration: Measure a sample of the coating and carry out the calibration using thesame method as for a material, except enter the coating velocity into the “COATING 1PT" area of
the CAL menu. Measure a coating sample on the high side of the measurement range.
Note: The coating sample must be coupled to metal in order to calibrate successfully. Place a dropof couplant on a piece of metal, lay the coating sample over the couplant on the metal and carry out
the calibration.
1. Physically measure a location on a coating sample using a set of calipers or a digital
micrometer.
Note: The coating sample must be coupled to metal in order to calibrate successfully. Place a dropof couplant on a piece of metal, lay the coating sample over the couplant on the metal and proceed
to step 2.
2. Apply a drop of couplant on the transducer and place the transducer in steady contact with thecoating (on metal) sample or actual test material. Be sure that the reading is stable and therepeatability indicator, in the top left corner of the display, is fully lit and stable.
3. Press MENU/CAL/COATING 1PT function.
4. Press ENTER to display the Digits Edit Box.
5. Adjust to match the coating thickness.
6. Press OK to set the coating velocity and return to the measurement screen, or ESC to cancel.

24

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Note: CHECK YOUR CALIBRATION! Place the transducer back on the calibration point. The
coating thickness reading should now match the known coating thickness sample. If the thickness
is not correct, repeat the steps above.
TWO-POINT CALIBRATION - Use the minimum coating sample for the two point calibration.
1. Conduct a one point calibration routine as described previously in this section. You should
conduct this routine at the high end of the measurement range.
2. Physically measure the thinner of the two samples of the coating, as close as possible to theminimum expected coating measurement range, using a set of calipers or a digital micrometer.
Note: If coating measurements are to be made with the coating applied to a metal surface, thecalibration must be done in the same manner, with the samples coupled to a metal surface.
However, if the coating is to be measured as a stand alone material, the calibration must be
performed the same way.
3. Apply a drop of couplant on the transducer and place the transducer in steady contact with thethinner of the two coating and samples. Be sure that the reading is stable and the repeatability
indicator, in the top left corner of the display, is fully lit and stable.
4. Press MENU/CAL/COATING 2PT.
5. Press ENTER to display the Digits Edit Box.
6. Press OK to set the coating velocity and return to the measurement screen, or ESC to cancel.
Note: CHECK YOUR CALIBRATION. Place the transducer back on both calibration points. If thecoating thickness readings match the known thickness values of each sample calibration has beensuccessful and you are now ready to take measurements. If the thickness is not correct, repeat thesteps above.

9 MEASUREMENT - TAKING READINGS
Disclaimer: Inherent in ultrasonic thickness measurement is the possibility that the instrument will
use the second rather than the first echo from the back surface of the material being measured. This
may result in a thickness reading that is TWICE what it should be.
Responsibility for proper use of the instrument and recognition of this phenomenon rests solely withthe user of the instrument.
Other errors may occur from measuring coated materials where the coating is insufficiently bonded
to the material surface. Irregular and inaccurate readings may result. Again, the user is responsible
for proper use and interpretation of the measurements acquired.
9.1 BEFORE YOU START•

Prepare the surface - further information on “Condition and Preparation of Surfaces” can befound on the Elcometer Knowledge Centre on website www.elcometerNDT.com•

Ensure the correct transducer is selected and set in the gauge - see “Transducer - Setting
Type Of” on page 33.

•

Select the correct measurement mode (P-E, PECT, PETP, E-E, E-EV, CT) - see“Measurement - Modes” on page 18.

•

Set the zero point of the transducer - see:•••Calibrate the gauge - see:•25

“Transducer - Zeroing” on page 20 and“Transducer - Zeroing for Coating Only Measurements” on page 21.
“Calibrating - for a Material” on page 22 and

en
•
•

“Calibrating - for a Coating” on page 24.

Choose the measurement view (DIGITS, RF or RECT, or B-SCAN) - see “The Measurement
Screen” on page 30.

9.2 PROCEDURE
1. Apply couplant
For the gauge to work correctly there must be no air gap between the transducer and thesurface of the material to be measured. This is achieved using a couplant.
Before the transducer is placed on the surface, put a small amount of couplant supplied withthe gauge on the surface of the material. Typically a single drop is sufficient.
2. Place transducer onto the surface of the material to be measured
Press the transducer wearface into the couplant. Only moderate pressure is necessary tokeep the transducer stationary and the wearface seated flat against the surface of thematerial.
3. Read display
If six or seven bars of the stability indicator are showing, the display will be reading the correct
thickness of the material directly beneath the transducer.
If the stability indicator has fewer than five bars showing, or the numbers on the display seemerratic, check to make sure that there is an adequate film of couplant beneath the transducer,
and that the transducer is seated flat against the material. If the condition persists, it may benecessary to:••adjust the gain, or
select a different transducer (size or frequency) for the material being measured.

The gauge will perform a number of measurements every second when the transducer is incontact with the surface of the material. The display is updated as each reading is taken.
4. Remove transducer from surface
The display will show the last measurement made.
Note: Occasionally, a small film of couplant will be drawn out between the transducer and thesurface as the transducer is removed. When this happens, the gauge may perform a measurement
through this couplant film. This phenomenon can be seen when one thickness value is observed
while the transducer is in place, and another value is observed after the transducer is removed. If
this happens, take the reading again using less couplant.

10 GATES
10.1 INTRODUCTION
Further information on gates may be found on the Elcometer NDT Knowledge Centre on
www.elcometerNDT.com
10.2 ADJUSTING THE GATESThe quickest way to adjust the settings of the three gates is directly from the hot menu. Alternatively,
adjust the values using the menus:
1.
2.
3.
4.

Press MENU, GT1, GT2 or GT3 menu and then highlight the setting you wish to adjust.
Adjust to suit the measurement application.
Press OK to set the value and return to the menu screen, or ESC to cancel.
Press MEAS to return to the measurement screen.
26

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11 THRUPAINT™ MEASUREMENT TECHNIQUE
Your gauge is equipped with a ThruPaint™ measurement mode that uses a multiple echo
technique to allow measurement of the material thickness beneath a coating. This is useful forchecking the material thickness of a painted object.
ThruPaint™ capability is available in E-E and E-EV modes, to activate through paint operation
select one of these measurement modes using the “MULTI MODE” key.
Further information may
www.elcometerNDT.com

be

found

on

the

Elcometer

NDT

Knowledge

Centreon

12 MEASUREMENT - OPTIONS
12.1 AUTO FIND
When using a scan type display, the DELAY and RANGE (or B-START and B-DEPTH) must be set
correctly for the waveform to be shown on the display. If these parameters are set up incorrectly
nothing will be seen. The AUTO FIND function solves this problem by automatically adjusting theseparameters so that the relevant part of the waveform is shown on the screen.
To use the AUTO FIND function place the transducer on the material to obtain a reading, select
MENU/UTIL/AUTO FIND.
12.2 HIGH SPEED SCAN
Although your gauge excels at making single point measurements, it is sometimes desirable toexamine a larger region, searching for the thinnest point. The gauge includes a feature, called Scan
Mode, which allows it to do just that.
This mode increases the overall repetition rate to a maximum of 140 Hz with a high speed screen
refresh rate of up to 120 times a second.
This feature enables the user to make scanned passes over an arbitrary length of the test material
while still maintaining a reasonable representation of thickness over the scanned area or region.
This feature can be used in conjunction with High and Low alarm limits features to keep track ofboth values dynamically.
To enable/disable the high speed Scan Mode:
1. Select MENU/UTIL/SCAN MODE.
2. Use the LEFT and RIGHT arrows of the right wheel to toggle the SCAN MODE on/off.
3. Press MEAS to return to the measurement screen, ready to begin taking readings.
12.3 ALARM MODE
Your gauge includes an Alarm Mode. Set the limits, and if a measurement falls outside of theselimits your gauge will signal an alarm (a red light on the front panel of the instrument and/or an
audible beep).
This feature may be used for a variety of applications to verify the material is within the manufacturer
specifications.
There are two limit values, ALARM LOW and ALARM HIGH. You can choose to activate both orjust one of these values depending on your requirements.
To enable/disable Alarm Mode:
1. Select MENU/UTIL/ALARM.
2. Use the LEFT and RIGHT arrows of the right wheel to toggle the ALARM on/off/audible.

27

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3. Press MEAS to return to the measurement screen, ready to begin taking readings.
To set the Alarm limits:
1. Select MENU/UTIL/ALARM.
2. Choose ALARM LOW or ALARM HIGH.
3. Press ENTER to display the Digits Edit Box.
4. Adjust to suit the measurement application.
5. Press OK to set the alarm value and return to the menu screen, or ESC to cancel.
6. Press MEAS to return to the measurement screen.
12.4 DIFFERENTIAL MODE
Your gauge includes a Differential Mode. Set the nominal value of thickness (based upon the
expected thickness value), and the gauge measures the difference (+/-) from this nominal value.
This feature is typically used in QA incoming inspections on pipes, plate stock, coils, etc.
To enable/disable Differential Mode:
1. Select MENU/UTIL/DIFFERENTIAL.
2. Use the LEFT and RIGHT arrows of the right wheel to toggle the DIFFERENTIAL on.
A value will appear to the right of DIFFERENTIAL.
3. Press MEAS to return to the measurement screen, ready to begin taking readings.
To set the Differential value:
1. Enable Differential Mode (see steps above).
2. When DIFFERENTIAL has been enabled and a value is being displayed to the right of the
DIFFERENTIAL label, press ENTER to display the Digits Edit Box.
3. Adjust to suit the measurement application.
4. Press OK to set the differential value and return to the menu screen, or ESC to cancel.
5. Press MEAS to return to the measurement screen.
12.5 POLARITY
The polarity that your gauge detects on can be set to either positive or negative to obtain the best
detection results depending on the specific measurement conditions of your application. Polarity
affects both the gate (above or below the x axis in the RF A-Scan) and the Rectified A-Scan display(whether the top or bottom half of the RF display is shown.
For further information refer to the Elcometer NDT Knowledge Hub www.elcometerNDT.com
To adjust POLARITY:
Set the measurement screen view to RF. The option is found in MENU/TUNE/POLARITY.
12.6 PULSE WIDTHYour gauge has an adjustable pulse width option. Pulse width refers to the duration of time thepulser is switched on. Pulse width determines the amount of energy transmitted into the material
being tested.
There are three pulse width options:
SPIKE - The Spike option is used for high resolution and general applications and can be consideredas the standard setting.
THIN - When additional energy is needed for more penetration, the Thin option may be necessary.
WIDE - When even more energy is needed for more penetration, the Wide option may be necessary.
28

enHigh frequency applications, where resolution is a requirement, may require the Spike or Thinsettings to achieve optimal results. Low frequency applications, where more penetration is arequirement, may require the Thin or Wide settings, offering increased penetration. The variety oftransducer frequencies and diameters used in conjunction with the pulse width setting, enable you
to fine tune the gauge to your application needs.
To adjust the Pulse setting:
The option to adjust the PULSE WIDTH function is found in MENU/TUNE/PULSE.
12.7 PULSER VOLTAGE
Your gauge has a 200 V square wave pulser that can be adjusted for specific applications andtransducers. The standard pulser setting is 150 V, and the Pulser Volt function allows you toincrease or decrease this value by 50 V to give greater penetration for difficult material types, orincreased resolution on noisy materials.
The option to adjust the Pulser Voltage setting is found in MENU/TUNE/PULSER VOLTAGE.
12.8 DAMPING
Your gauge has a damping function which adjusts the input impedance of the receiver. This enables
you to optimise the gauge to suit the transducer for better signal quality at various frequencies. The
damping settings are 50, 75, 100, 300, 600 and 1500 ohms.
The option to adjust the DAMPING setting is found in the MENU/TUNE/DAMPING.

13 TRANSDUCERS FOR THICKNESS MEASUREMENT
Further information on Transducers can be found on Elcometer NDT Knowledge Centre on
www.elcometerNDT.com

29

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SECTION : 3 FLAW DETECTOR
14 THE MEASUREMENT SCREEN
When the GAUGE function is set to FLAW DETECTOR, the FD800DL/FD800DL+ Corrosion and
Flaw Gauge becomes a flaw detector with the ability to detect the size and position of flaws and todifferentiate between flaw types in various materials and welded joints.
Your gauge has four types of measurement screen:•

RF (Radio Frequency)•+RECT (Rectified Radio Frequency, positive polarity)•-RECT (Rectified Radio Frequency, negative polarity)•

RECTFW (Full Wave Rectified Radio Frequency)
RECT

RF

RECTFWTo see the measurement screen, press MEAS.
To select which measurement screen to use, select MENU/DISP/VIEW and then select RF,+RECT, -RECT or RECTFW.

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14.1 ITEMS COMMON TO ALL MEASUREMENT SCREENS
A number of items are common to all the measurement screens:
A
B

3.0DD

T
P
G

E

C
D

G

H

F
I
J

A

Repeatability/Stability
Indicator

When taking readings, this indicator shows thestability/repeatability of the sound path signal. When all thevertical bars are fully illuminated the repeatability of the soundpath is stable.

B

Battery Indicator

Indicates the battery life remaining

C

HeightThe signal amplitude height as a percentage of 100% full screen
height. Depending on the quantity selected, this could be
displayed in dB or D.

D

Feature Status Bar

Indicates the features currently enabled and in use:•

Toolkits (TRIG, AWS, TCG, DAC, DGS)•

View (RF, R+, R-, FW)•

Detect (ZX, FK, PK)•

Leg-Skip Leg reference (L1....L4....)•

Alarm Mode (G1+, G2+)•

Gain SettingE

Leg (skip leg)

Indicates which skip/leg the detection is on.
The thickness of the material is used to calculate the leg.

F

Hot Menu

The hot menu contains a selection of the most commonly used
options, allowing you to conveniently adjust them to your needs
while the graphical display is active. They can be displayed andscrolled by pressing the MEAS key at anytime. The ESC key isused in conjunction with MEAS key to reverse the direction
scrolled.

G

MemoryIndicates that the currently displayed measurement screen andvalues have been previously stored in the memory. When MEM
is displayed, all measurement functions are disabled until theuser advances to an empty storage location, or the current
measurement is cleared by pressing the CLR key.

H

A-Scan Display

The actual echo reflections returned from the backwall or defect.

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I

Grid or Sequential Log
Name

References the name of the log file currently open.

J

Log File

Shows the storage cells of the current log file open. Dependingon the quantity currently selected, shows either the % height ordB value stored.

14.2 RF MEASUREMENT SCREEN
The RF view shows a graphical representation (similar to the trace of an oscilloscope) of the soundreflections returning to the transducer. The waveform display shows the amplitude of the signal
received on the vertical (Y) axis and time (shown in units of thickness) on the horizontal (X) axis.
The RF waveform includes both the positive and the negative peaks.
The detection point is displayed on the waveform. The RF waveform view is typically used for finetuning of the gauge prior to carrying out an inspection.
Press OK to also display digits on screen.

14.3 +RECT MEASUREMENT SCREEN
The +RECT view is similar to the RF display but shows only the positive half of the waveform.
The detection point is indicated on the waveform.

14.4 -RECT MEASUREMENT SCREEN
The -RECT view is the same as the +RECT view but shows only the negative half of the waveform.

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en14.5 RECTFW MEASUREMENT SCREEN
The RECTFW view shows the entire sine wave signal in a rectified view. There is no polarity.

15 SETTING UP THE FLAW DETECTOR
To set up the gauge ready to detect flaws you must first set the correct transducer type and thencalibrate the gauge by adjusting the sound-velocity value to match the value of the material you aremeasuring. The zero value must also be set.
15.1 TRANSDUCER - SETTING TYPE OF
The gauge must be set to the correct transducer type (SINGLE element, or DUAL element):
1. Select MENU/PRB/TYPE.
2. Use LEFT and RIGHT of the right wheel to adjust the value of TYPE.
3. Press MEAS to return to the measurement screen.
Note: Once the transducer type has been selected, your gauge will store and recall this transducer
type every time it is switched on. Use the above procedure to change the TYPE value if necessary.
15.2 ABOUT CALIBRATION
Different types of material have different sound-velocities. For example, the velocity of soundthrough steel is 5918 m/s (about 0.233 in/µs) and the velocity of sound through aluminium is6350 m/s (about 0.248 in/µs).
If the gauge is not set to the correct sound-velocity, all of the measurements the gauge makes will
be erroneous by some fixed percentage.
Note: The calibration procedures for the flaw detector and thickness gauge are different. The flaw
detector does not use the same probe zero technique as the thickness gauge so for best thickness
reading accuracy in flaw mode follow this guide carefully.
There are three methods of calibrating your gauge:
KNOWN MATERIAL CALIBRATION: The material you are measuring is selected from a list of materials
stored in the gauge. After you have entered the material, you should check and if necessary adjust
the zero value - see page 34 making this the preferred calibration method.
KNOWN VELOCITY CALIBRATION: The sound-velocity of the material being measured is entereddirectly into the gauge. After you have selected the sound-velocity of the material, you should checkand if necessary adjust the zero value - see page 34.

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KNOWN THICKNESS CALIBRATION: The gauge is calibrated by setting it to two known thicknesses see page 35. The zero value is set automatically during this procedure.
For the highest measurement accuracy use the known thickness calibration, as this takes into
account variation in material composition, temperature and a variety of other factors.
15.3 KNOWN MATERIAL CALIBRATION
If the material velocity is unknown, and a sample thickness cannot be taken from the material, you
can choose a material type from a list stored in the gauge. For each material stored in the list there
is a corresponding longitudinal velocity value and a shear velocity value.
Note: In order to display the chart containing the shear wave velocities, the TRIG mode must be
enabled - see See “TRIG - Trigonometry Mode” on page 41.
Note: These velocities will not always be an exact representation of the material being tested. Usethese values only if a close approximation is acceptable.
1. Press MENU/CAL/MAT and then press ENTER.
2. Scroll through the material list until the appropriate material is highlighted.
3. Press ENTER to choose the material type, then press OK.
The material velocity and zero value are displayed in the CAL menu.
4. Press MEAS to return to the measurement screen.
5. Measure a calibration standard and, if necessary, adjust the zero value until the material
thickness value matches the thickness of the calibration standard - see “Manually Adjusting
the Zero Value” on page 34.
15.4 KNOWN VELOCITY CALIBRATION
If the material velocity is known, you can enter the velocity value directly into the gauge. A list of thesound velocities of common materials is given at the end of this instruction manual.
1. Select MENU/CAL/VELOCITY.
2. Press ENTER to display the Digits Edit Box.
3. Use the navigation buttons to adjust the value.
4. Press OK to set the velocity and return to the menu screen, or ESC to cancel.
The material velocity and zero value are displayed in the CAL menu.
5. Press MEAS to return to the measurement screen.
6. Measure a calibration standard and, if necessary, adjust the zero value until the material
thickness value matches the thickness of the calibration standard - see “Manually Adjusting
the Zero Value” on page 34.
15.5 MANUALLY ADJUSTING THE ZERO VALUE
If you have calibrated the gauge by entering a material type or the velocity value of the material, you
should check and if necessary adjust the zero value. This step requires a calibration block.
1. Place the transducer on step of known thickness.
2. Select MENU/CAL/ZERO.
3. Use the LEFT and RIGHT keys to scroll the value, or press ENTER to open the digits edit box
and adjust the value using the navigation buttons.
4. Press OK to set the value and return to the menu screen, or ESC to cancel.
5. Press MEAS to return to the measurement screen.
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15.6 KNOWN THICKNESS CALIBRATION
If the sound velocity of a material is unknown, a sample with two known thicknesses can be used
to determine the sound velocity. If a sample is not available, calibration standards representing theminimum and maximum thickness of the overall inspection range intended are required. They mustalso be of the same material type as the intended application. The example of thickness calibration
given in this section uses a 1” and a 4” standard for calibration.
Note: This section describes performing a calibration using a straight beam contact transducer.
Single and dual element probes may be calibrated in this way. Further information can be found on
the Elcometer NDT website on www.elcometerNDT.com
LOAD THE DEFAULT SETUP
The gauge will require a few basic adjustments in order to get underway with the calibration
process. For this example the default setup will be loaded as a starting point.
1. Select MENU/SETUP/DEFAULT SETUP.
2. Press ENTER.
3. Press OK.
4. Press MEAS to return to the measurement screen.
SET THE RANGE
Set the range so that peaks from the small and large calibration samples are visible on the display.
Our calibration range for this example is 4”. Therefore setting a range of 5” will enable you to viewthe entire range on the display.
Use the hot menu to adjust the RANGE value to 5”.
ENABLE AND CONFIGURE GATE 1
In order to measure, a gate is required. The widthof the gate should be small enough, in terms of its
width, in order to select specific reflections tomeasure. The purpose of the gate is to allow thegauge to detect on a particular signal. To calibrate
the gauge the user must ensure that the horizontal
gate line and the signal peak of interest cross. You
can use the GATE1 item in the hot menu with thenavigation keys to move the gate over signal ofinterest. Enable the DETECT MARK to check thegauge is detecting on the correct peak. On
z-crossing and flank detection modes (seepage 11), the first peak the gate crosses will be
used.

Gate for 1”
Calibration Standard35

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The screenshots show gates enabled to select the1” calibration standard, and the 4” calibration
standard.
To enable and configure Gate 1, follow the
instructions given in “Gates” on page 39 and use
the following suggested settings:
ALARM:
DETECT:GATE#:GATE# WIDTH:THRESHOLD#:
POLARITY:ONABOVE
A value less than 1”
A value greater than 1”
20%
POSITIVE

Note: The settings given above are for thisparticular example calibration. You should always
use settings which meet the requirements of yourapplications.

Gate for 4”
Calibration Standard

CALIBRATING TO THE FIRST POINT (ON THE THIN CALIBRATION STANDARD)
1. Apply a drop of couplant on the transducer and place the transducer in steady contact with the1” thin calibration standard. Be sure that the reading is stable and the repeatability indicator, inthe top left corner of the display, is fully lit and stable. Also, be sure there is sufficient signal
amplitude in order to avoid peak jumping or missing the first cycle.
2. Press MEAS to view the measurement
screen.
3. In the hot menu, scroll to GATE1.
4. Use LEFT and RIGHT on the right wheel tomove the gate over the peak of the
waveform to be measured, as shown in thescreenshot.
Note: In order to trigger on a signal, thewaveform must be inside the boundaries of
the gate.
5. Select MENU/CAL/ MATL 1PT.
6. Press ENTER to display the Digits Edit Box.
7. Use LEFT and RIGHT to scroll the value, or press ENTER to open the digits edit box andadjust the value using the navigation buttons.
8. Press MEAS to calculate the material velocity and return to the menu screen, or ESC tocancel.

36

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CALIBRATING TO THE SECOND POINT (ON THE THICK CALIBRATION STANDARD)
1. Repeat the steps given in section above, but
this time:•••

Use the 4” calibration standard (insteadof the 1” calibration standard).
Adjust GATE1 over the waveform - asshown in this screenshot.
Adjust the value of MATL 2PT to matchthe length of the 4” calibration standard(instead of MATL 1PT).

The material velocity and zero value arecalculated and displayed as shown.
2. Press MEAS to return to the measurement
screen.
ADJUSTING THE GATE TO THE
CALIBRATED RANGE
In order to trigger on anything that is detected in
the calibrated range, the boundaries of the gate
must be adjusted to include the entire range.
Note: Caution: in both z-cross & flank detection
settings, the first signal to cross the gate will be
triggered on. However, if the peak detection
setting has been enabled, the signal with themost amplitude will be detected.

1. Press MEAS to view the measurement
screen.
2. In the hot menu, scroll to GATE1.
3. Move the gate start to a position less than 1”.
4. In the hot menu, scroll to WIDTH1.
5. Adjust the width of the gate until its righthand end is at a position greater than 4”.
6. Place the transducer back on the calibration
points (1” and/or 4”).
7. Press OK to display the thickness.

WIDTH1 adjusted

37

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The thickness reading should now match the
known thickness. If the thickness is notcorrect, repeat the calibration procedure.

Press OK to display
thickness
15.7 CALIBRATION FOR ANGLE BEAM
TRANSDUCERS
Further information on Calibration for Angle Beam Transducers can be found on the Elcometer NDT
Knowledge Centre on www.elcometerNDT.com

16 MEASUREMENT - DETECTING FLAWS
Disclaimer: Inherent in ultrasonic measurement is the possibility that the instrument will use thesecond rather than the first echo from the back surface of the material being measured. This may
result in a incorrect readings.
Responsibility for proper use of the instrument and recognition of this phenomenon rests solely withthe user of the instrument.
Other errors may occur from measuring coated materials where the coating is insufficiently bonded
to the material surface. Irregular and inaccurate readings may result. Again, the user is responsible
for proper use and interpretation of the measurements acquired.
16.1 BEFORE YOU START•

Prepare the surface - further information on “Condition and Preparation of Surfaces” can befound on the Elcometer Knowledge Centre on website www.elcometerNDT.com•

Set transducer type, calibrate and set the zero - see “Setting Up The Flaw Detector” onpage 33.

•

Set up the Gate or Gates - see “Gates” on page 39.

•

Choose the measurement view - see “The Measurement Screen” on page 30.

16.2 PROCEDURE

17 ADJUSTING THE WAVEFORM DISPLAY
If the waveform around the detection point is not visible on the display, use one of the following
methods to adjust the viewable range of the display:•

Use the Auto Find function - see “Auto Find” on page 27. This is the preferred method andprovides a quick and easy method of adjusting the viewable range.

•

Change the values of the DELAY and RANGE functions until the measurement falls inside theviewable range of the display - see instructions below.

38

en17.1 AUTO FINDYour gauge includes a function for locating the detection point of a back wall echo that is not
currently in the viewable region of the display. Suppose the gauge is currently setup with a delay of
0.0 and a width of 1.0, and you are measuring material with a thickness of 2.5. The gauge will makethe correct measurement and display it digitally, however, the waveform will not be visible without
adjusting the values of Delay and Width.
The AUTO FIND function solves this problem by letting the gauge find the detection point and bring
the waveform signal into view automatically. If necessary you can then make small adjustments to
the range once the signal is displayed on the screen.
To use the AUTO FIND function:
1. Place the transducer on the test material and obtain a reading.
2. Press MENU/UTIL menu and then highlight the AUTO FIND function.
3. Press ENTER.
4. Press OK. This will adjust the settings automatically and the waveform is brought into view on
the measurement screen.
5. Press MEAS to return to the measurement screen, ready to begin taking readings.
17.2 DELAY & RANGE
See “DELAY AND RANGE” on page 16.
17.3 ADJUSTING DELAY AND RANGE
See “Adjusting DELAY and RANGE (or B-START and B-DEPTH)” on page 16.
17.4 GAIN
See Section “Gain” on page 16.
17.5 TO ADJUST THE GAIN VALUE
See “To Adjust the Gain Value” on page 17.

18 GATESYour gauge is equipped with two gates which control the time measurement process and which play
an important role in the detection and measurement of a flaw. Detections are only made within theboundaries of a gate. Anything outside of the start and range/width of the gate will be ignored. The
height of a gate is also a threshold, and controls the level of sensitivity. The gates can be adjusted
to a specific reference height, based on a predetermined reflector, and set to act as an alarm during
the inspection process.

39

enUsing gates to adjust the time measurement
process allows you to measure a specific region on
and between waveforms. For example, a test blockwith a target size and depth is optimised on thedisplay with a signal amplitude at 70% full screen
height. The inspector wants to know about any
defects during the inspection that are greater thanor equal in size to the calibrated test specimen. A
gate is then enabled and set to a reference heightof 70%. The width and range are adjusted to cover
the range tested, and you are then ready to
conduct the inspection.
The two gates are fully independent. Each gate
has a start and stop or width, a threshold, a polarity
switch, and a detect option. Both gates can be
enabled and set for different detects and polarities,
and can be positioned anywhere on the display
independent of one another.

Gate Enabled

The screenshots show a rectified waveform
without a gate (disabled) and with a gate enabled.
The enabled gate is shown as a horizontal line on
the display.

Gate Disabled

Each gate has the following settings:
Setting

ValuesFunction

ALARM

ON

Enables the gate and flashes the red light on the front of thegauge when the waveform breaks the threshold level, either
above or below, depending on the current DETECT setting.
Disables the gate.
When disabled, all the other menu items are greyed out.
Has the same function as ON, but sounds a beeper as well as
flashing the red light.
Triggers the alarm when a signal is equal to or greater than theheight of the gate.
Triggers the alarm when a signal is equal to or less than theheight of the gate.
Sets the start position of the gate relative to the horizontal axis
or depth (this is the left boundary of the gate, or where it turns
on).

OFF
AUDIBLEDETECT

ABOVE
BELOW

GATE#

Numerical
value

40

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Setting

ValuesFunction

GATE# WIDTH

Numerical
value

THRESHOLD#
POLARITY%POSITIVE
NEGATIVE

Sets the width of the gate relative to the horizontal axis or
depth (this sets the right boundary of the gate, or where it turns
off).
Sets the sensitivity of the gate (its height).
Sets detection to occur on the positive going echo.
Sets detection to occur on the negative going echo.

Some settings can be adjusted from the hot menu but all settings are found to adjust any of thesesettings:
1. Select MENU/GT1 or GT2 and highlight the desired setting.
2. Use the LEFT and RIGHT keys of the right wheel to scroll the value, or press ENTER to open
the digits edit box and adjust the value using the navigation buttons.
3. Press OK to set the value and return to the menu screen, or ESC to cancel.
4. Press MEAS to return to the measurement screen.

19 TRIG - TRIGONOMETRY MODE
19.1 ABOUT TRIGONOMETRY MODE
Trig mode is most commonly used for inspecting welded joints using an angle beam transducer.
Due to the location, orientation, and geometry of the weld, a straight beam transducer is typicallynot suitable for inspection. As a result, a transducer emitting sound at a given angle will allow theoperator to position the transducer away from the weld, and skip into the weld at a given angle.
Therefore, in order to determine the location of a defect, given a specific angle, the trigonometrymode is used.
This section describes the steps you need to take to setup and use trigonometry mode.
ANGLE BEAM TRANSDUCERS FOR WELD INSPECTION

Angle Beam Transducer
where:SP =Sound pathAngle =
Transducer angle
Thickness = Material thickness
X-Offset = Front of wedge less Index
SD =Surface distance
Depth =
Depth of flaw from surface

41

Weld Inspection

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TYPICAL TRIG MODE MEASUREMENTSCREENA

When TRIG mode is enabled, thecalculated measurements are displayed
above the waveform display area at (A),and the signal amplitude as a percentage offull screen height at (B).

B

CURVED SURFACE CORRECTION
The gauge will also compensate for convex curved
surfaces of longitudinally welded pipes.
For a given transducer, a curved surface results in alonger sound path than a flat surface. You should
consider the angle used on curved surfaces, withrespect to the material thickness, in order to be sure areflection will occur from the opposite surface of thetest material.
In order to use the curved surface compensation
function, the outside diameter must be entered into thegauge.
19.2 SETTING UP TRIGONOMETRY MODE
TRIG MODE SETTINGS
Setting

ValuesFunction

TRIG

ON
OFF

THICKNESS

Numerical
value
Numerical
value
Numerical
value

Enables Trig Mode.
Disables Trig Mode.
When disabled, all the other menu items are greyed out.
The thickness of the material being scanned for flaws.

ANGLE
X-OFFSETCSC OD

Numerical
value

The angle of the transducer.
The X-Offset is used for purposes of marking, and isphysically measured with a ruler from the index point to thefront edge of the transducer.
Curved Surface Outside Diameter. This value is only used
when scanning the curved surfaces of longitudinally weldedpipes.

ADJUSTING TRIG MODE SETTINGS:
1. Select MENU/TRIG then the desired function.
2. Use the LEFT and RIGHT keys of the right wheel to scroll the value, or press ENTER to open.
the digits edit box and adjust the value using the navigation buttons.
42

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3. Press OK to set the value and return to the menu screen, or ESC to cancel.
4. Press MEAS to return to the measurement screen.

20 AWS - WELD INSPECTION
20.1 ABOUT AWS
Further information on AWS - Weld Inspection can be found on the Elcometer NDT Knowledge
Centre on www.elcometerNDT.com
AWS D1.1 STANDARD: There are specific transducers that are required by the D1.1 standard. The
frequency specified by the standard is 2-2.5MHz. Please refer to the standard for further
information.
20.2 SETTING UP THE AWS FUNCTION
Before setting up and using the AWS function you must:
1. Conduct a two point calibration - see “Known Thickness Calibration” on page 35.
2. Set up TRIG mode - see “Setting up Trigonometry Mode” on page 40.
AWS SETTINGS
Setting

ValuesFunction

AWS

ON
OFF

Enables the AWS function.
Disables the AWS function.
When disabled, all the other menu items are greyed out.
Enables reference gain.
Disables reference gain.
% Screen Height is an arbitrary level, and is not specified
by the AWS D1.1. Set a value that will optimise viewing
defects that are larger and smaller than the reference level.
Typically this level is set between 50% to 80% of full screen
height.

SET REF GAINON
OFF
% SCRN HEIGHT Numericalvalue

ADJUSTING AWS SETTINGS
1. Select MENU/AWS then the desired function.
2. Use the LEFT and RIGHT keys of the right wheel to switch on or off, or to select value.
3. Press MEAS to return to the measurement screen.

43

en20.3 USING AWS
1. Couple the transducer to the first calibration standard and peak up on the reflector to achieve
maximum signal amplitude.

2. Enable the AWS function and adjust the AWS settings to your requirements (see “Adjusting
TCG Settings” on page 45). Ensure that the value of DRAW is set to ON.
A highlighted cursor is displayed in the waveform area, starting at the left most side of themeasurement screen.
3. In the hot menu, scroll to GATE1.
Because you have already calibrated the gauge and set up the TRIG function, the gate isalready enabled and a grey cursor is visible in the waveform area of the measurement screen.
4. Use LEFT and RIGHT to position the start of GATE1 to trigger on the waveform.
5. Optional: In the hot menu:••

Scroll to WIDTH1.
Use LEFT and RIGHT to adjust the value of WIDTH1 until the signal is in the gate.

When the signal is in the gate, the height indicator will detect and display the % full screen
height.
6. In the hot menu, scroll to AWS BOX.
7. Use LEFT and RIGHT keys of the right wheel to position the cursor box over the waveform
and then press ENTER to set the REF GN (reference gain) value.
Note: This process can be repeated and reset multiple times, or until the SET REF GAIN function is toggled OFF.
8. Press MENU, scroll to the AWS menu and then highlight the SET REF GAIN function.
9. Use LEFT and RIGHT to scroll the value of SET REF GAIN to OFF.
10. Press MEAS to return to the measurement screen.
11. Press OK to view the AWS screen.

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21 TCG - TIME CORRECTED GAIN
The TCG function increases gain as distance increases in order to achieve an overall level ofsensitivity for the same reflector at different distances. The gain is adjusted at each selected point
to display the signal amplitude at a predetermined reference level.
Further information can
www.elcometerNDT.com

be

found

on

the

Elcometer

NDT

Knowledge

Centreon

21.1 SETTING UP THE TCG FUNCTION
Before setting up and using the TCG function you must:
1. Conduct a two point calibration - see “Known Thickness Calibration” on page 35.
2. If you are going to use the TRIG mode, set it up before using the TCG function - see “Setting
up Trigonometry Mode” on page 40.
TCG SETTINGS
Setting

ValuesFunction

TCG

ON
AUDIBLE
OFF

DRAW
CURVE

ON
OFF
ON

% SCRNHEIGHTOFF
Numerical
value

Enables the TCG function.
Enables audible signal.
Disables the TCG function.
When disabled, all the other menu items are greyed out.
Enables draw mode.
Disables draw mode.
Enables TCG correction curve and displays the curve on themeasurement screen.
Disables TCG correction curve.
Sets the reference level of the TCG as a percentage of fullscreen height (FSH).

ADJUSTING TCG SETTINGS
1. Select MENU/TCG.
2. Use the LEFT and RIGHT keys of the right wheel to scroll the value, or press ENTER to open
the digits edit box and adjust the value using the navigation buttons.
3. Press OK to set the value and return to the menu screen, or ESC to cancel.
4. Press MEAS to return to the measurement screen.

45

en21.2 DRAWING A TCG CURVE
1. Couple the transducer to the first calibration standard and peak up on the reflector to achieve
maximum signal amplitude.

2. Enable the TCG function and adjust the TCG settings to your requirements (see “Adjusting
TCG Settings” on page 45). Ensure that the value of DRAW is set to ON.
A highlighted cursor is displayed in the waveform area, starting at the left most side of themeasurement screen.
3. In the hot menu, scroll to TCG BOX.
4. Use LEFT and RIGHT of the right wheel to move the cursor over the section of the waveform
to be used as the first point in the TCG curve and then press ENTER to set the first point of thecurve.
5. Repeat step 4 multiple times to set other points of the curve.
The TCG curve is displayed after three points have been set/recorded, and will continue to be
redrawn/updated for each additional point added.
Note: A TCG curve can contain a maximum of eight points.
Note: Any point can be cleared by pressing CLR when the value of DRAW is set to ON.
6. Press MENU, scroll to the TCG menu and then highlight the DRAW function.
7. Use LEFT and RIGHT keys of the right wheel to scroll the value of DRAW to OFF.
The TCG curves are now set and ready to be used for inspection.

22 DAC - DISTANCE AMPLITUDE CORRECTION
22.1 ABOUT DAC
A DAC curve is a gate with a variable threshold to compensate for a given reflector type and size
measured at different depths.
Further information can
www.elcometerNDT.com

be

found

on

the

Elcometer

NDT

Knowledge

Centreon

Note: Based on the gauge screen resolution, the dynamic range of the DAC is approximately 18 dB.
As a result, inspection of any materials that attenuate more than 18 dB over the inspection range,
the DAC feature should not be used, and TCG should be considered (see “TCG - Time Corrected
Gain” on page 45).

46

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22.2 SETTING UP THE DAC FUNCTION
Before setting up and using the DAC function you must:
1. Conduct a two point calibration - see “Known Thickness Calibration” on page 35.
2. If you are going to use the TRIG mode, set it up before using the DAC function - see “Setting
up Trigonometry Mode” on page 40.
DAC SETTINGS
Setting

ValuesFunction

DAC

ON
AUDIBLE
OFF

DRAW

ON
OFF
DB
%FSH
%DAC

Enables the DAC function.
Enables audible signal.
Disables the DAC function.
When disabled, all the other menu items are greyed out.
Enables draw mode.
Disables draw mode.
Sets the quantity to be displayed when in the DAC function isenabled:MEAS•

dB - decibels•%FSH - The top of the waveform display represents 100%
full screen height. Any waveform amplitudes generated
greater than 100% full screen height will not be displayed.
100% is the greatest value that can be displayed.

•%DAC - All the DAC curve represents 100%. Any signal
generating an amplitude below the DAC curve is less than
100%, and any above greater than 100%.

Note: The MEAS option selected is overridden with %FSH
when DRAW is set to ON.

CURVE

TRIGGER

DAC, -2, -6,-10, (-6/-12),(-6/-14) dB
DAC, -2, -6,-10, (-6/-12),(-6/-14) dB

Note: This option can be changed at any time after the DAC
curve has been created.
Selects curve type. DAC or DAC less a number of decibels.
Note: This option can be changed at any time after the DAC
curve has been created.
Select which curve or gate to use as the alarm trigger.
Any of the DAC curves or gate displayed can be set as thetrigger alarm option.
The TRIGGER values available vary according to which
CURVE type is selected.
All the DAC curve or gate combinations only detect when theamplitude of the signal is at or above the selected trigger
option.
Note: This option can be changed at any time after the DAC
curve has been created.

ADJUSTING DAC SETTINGS
1. Select MENU/DAC then the desired function.
2. Use LEFT and RIGHT keys of the right wheel to scroll the value until the correct value is being
displayed.
47

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3. Press OK to set the value and return to the menu screen, or ESC to cancel.
4. Press MEAS to return to the measurement screen.
22.3 DRAWING A DAC CURVE
1. Couple the transducer to the first calibration standard and peak up on the reflector, adjusting
the gain to keep the signal height within the boundaries of the waveform display area, and at asuitable height to allow for attenuation at greater depths in the overall range to be tested.

2. Enable the DAC function and adjust the DAC settings to your requirements (see “Adjusting
DAC Settings” on page 47). Ensure that the value of DRAW is set to ON.
A highlighted cursor is displayed in the waveform area, starting at the left most side of themeasurement screen.
3. In the hot menu, scroll to DAC BOX.
4. Use LEFT and RIGHT keys of the right wheel to move the cursor over the section of the
waveform to be used as the first point in the DAC curve and then press ENTER to set the firstpoint of the curve.
5. Repeat step 4 multiple times to set other points of the curve.
The DAC curve is displayed after three points have been set/recorded, and will continue to be
redrawn/updated for each additional point added.
Note: A DAC curve can contain a maximum of eight points.
Note: Any point can be cleared by pressing CLR when the value of DRAW is set to ON.
6. Press MENU, scroll to the DAC menu and then highlight the DRAW function.
7. Use LEFT and RIGHT keys of the right wheel to scroll the value of DRAW to OFF.
The DAC curves are now set and ready to be used for inspection.

23 DGS (AVG) DISTANCE, GAIN, SIZE
23.1 ABOUT DGS
The DGS (Distance, Gain, Size) method was introduced in 1958 as a way to standardize theprocess of evaluating and sizing defects, also referred to by the German acronym AVG. Thismethod uses a combined empirical and mathematical model to eliminate the need for a large rangeof reference standards, generally required when using the DAC or TCG methods. DGS can bethought of as a mathematically derived DAC curve, and used as an alternative replacement for
DAC.

48

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Further information can
www.elcometerNDT.com

be

found

on

the

Elcometer

NDT

Knowledge

Centreon

23.2 DGS SETTINGS
Setting

ValuesFunction

DGS

On
AudibleOffREFERENCE
GAIN

On
Off
On

Enables the DGS function.
Enables audible signal.
Disables the DGS function.
When disabled, all the other menu items are greyed out.
Enables the reference gain using a given reflector from acalibration standard.
Disables reference gain mode.
Select DGS or GATE as detection curve.

Numerical
Value

Input probe diameter calculated using formulas as detailed on
page 50.

Numerical
Value
Numerical
Value
DVK
Mat & Ref
Loss, Trans
Loss
Numerical
Value
FBH
SDH
Backwall
Numerical
Value

Input probe frequency details.

TRIGGER
CURVE
EFFECTIVE
PROBE
DIAMETERPROBEFREQUENCYCURVE SIZE(ERS)
ATTENUATION

DELAY
VELOCITYREFERENCE
TYPE
REFERENCE
SIZE

49

Input number of curve to be used.
Input numerical values as required.

Input delay velocity as required.
Select the type of reflector to be used.

Input the size of the chosen reference reflector - FBH or SDH.

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23.3 ADJUSTING DGS SETTINGS
1. Select MENU/Distance Gain then the desired function.
2. Use LEFT and RIGHT keys of the right wheel to scroll the value until the correct value is being
displayed.
3. Press OK to set the value and return to the menu screen, or ESC to cancel.
4. Select TUNE/DETECT and set to PEAK, Z-CROSS or FLANK as required.
Note: The Gate can be adjusted in the usual manner as necessary.
23.4 DRAWING A DGS CURVE
1. Enable the DGS function and adjust the DGS settings to your requirements leaving the
REFERENCE GAIN off see ‘‘Adjusting DGS settings” detailed above.
2. Once all settings have been adjusted, switch REFERENCE GAIN on and then press MEAS.
3. Couple the transducer to the reference sample and peak up on the desired reflector.
4. Use LEFT and RIGHT keys of the right wheel to move the cursor over the peaked up echo andthen press ENTER.
5. Press MENU and switch off REFERENCE GAIN.
6. Press MEAS and the curve will appear on the measurement screen.
23.5 ESTIMATING EFFECTIVE DIAMETER
There are a number of transducers that are specially documented as DGS/AVG transducers. What
this typically infers is that the effective diameter, near field length, and centre frequency have been
determined and documented on the transducer certificate. If DGS/AVG transducers are being used,the values for effective diameter and frequency can simply be entered into the gauge. However, if
a standard transducer will be used and has a standard transducer certificate, the effective diametermust be estimated in order to determine the near field length (NFL).

Calculating NFL
2
N = D EFF - λ2
(4λ)
Where:
N = Near Field Length
DEFF = Effective Diameter
λ = Wave Length (velocity/frequency)

In order to approximate the effective diameter, the shape of the crystal must be taken into account.
Transducers are either round or square/rectangular in shape, and can be approximated as follows:

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K = 0.6935

Square/Rectangle DEFF)

K = 0.6935

B
A

3

2

B
- 0.3753 A + 0.0661

B
A + 0.09863

Where:
K = Aspect
A = Largest Dimension
B = Smallest Dimension

DEFF = 0.97 √K (A)DEFF = (Dia.) (.97)

Calculated results can also be compared to the following table:

Ratio of the sides

51

B/A

K

1.0

1.37

0.9

1.25

0.8

1.15

0.7

1.09

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Ratio of the sides
0.6

1.04

0.5

1.01

0.4

1.00

0.3

0.99

0.2

0.99

0.1

0.99

B = Smallest Dimension
A = Largest Dimension
K = Aspect Ratio
23.6 NEAR FIELD LENGTHS DIAGRAM

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23.7 ATTENUATION PARAMETERS
The attenuation section is setup to accommodate additional factors that can affect the accuracy of
the amplitude or sound energy, considering different application scenarios. The following
parameters are outlined below:

DGS ATTENUATION

MATERIAL LOSS

Ø.ØREFERENCE LOSS
TRANS LOSS

Ø.Ø
Ø.Ø

DVK (Curvature Correction): If a V1/K1 or V2/K2 (A2/A4, IIW/Kidney) calibration standard is used
as a reference reflector, the curved surface offers additional focus normally resulting in greater
single output. DVK is a correction to the gain, in order to simulate the amplitude generated from aflat back wall. This will typically result in an overall gain increase.
Material Loss: Used to correct for the attenuation (loss) of sound energy in the test material; inunits of dB/meter. It should be considered during inspections where the sound has to travel long
distances, or the material is very attenuative.
Reference Loss: Used to correct for the attenuation (loss) of sound energy in the calibration/reference standard; in units of dB/in or dB/meter.
Transfer Loss: Correction factor to account for the loss of sound energy from surface condition/roughness or inadequate coupling between the transducer and test specimen. The surface
condition of calibration/reference standards and actual material being tested in the field will typicallyvary. This is generally approximated based on the inspectors’ experience in the field. Units are dB/in
or dB/meter.

24 MEASUREMENT - OPTIONS
Further information can
www.elcometerNDT.com

be

found

on

the

Elcometer

NDT

Knowledge

Centreon

The Polarity function is used in the same way for the flaw detector as it is for the thickness gauge.
Polarity is selectable depending on the VIEW, GT1, GT2 and DAC settings.

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24.1 DETECT MODE
Your gauge has three detection modes; Z-Cross, Flank, and Peak. The following diagrams illustrate
the difference between the options:

Z-Cross

Flank

Peak

In the diagrams, the current polarity is positive (as shown by the position of the gate - above thebaseline).
Z-CROSS: The detection occurs as the first positive half cycle crosses the baseline and goes
negative.
FLANK: The detection occurs as the first half cycle left edge rises and breaks the threshold.
PEAK: The detection occurs at the highest peak in the gate.
To adjust the Detect Mode setting:
1. MENU/TUNE/DETECT MODE.
2. Use LEFT and RIGHT keys of the right wheel to select the correct DETECT MODE.
3. Press MEAS to return to the measurement screen, ready to begin taking readings.
24.2 PULSE WIDTH
See “Pulse Width” on page 28.
24.3 PULSER VOLTAGE
Your gauge has a 200 V square wave pulser that can be adjusted for specific applications andtransducers. The standard pulser setting is 150 V, and the Pulser Volt function allows you toincrease or decrease this value by 50 V to give greater penetration for difficult material types, orincreased resolution on noisy materials.
To adjust the Pulser Voltage setting:See “Pulser Voltage” on page 29.
24.4 PULSE REPETITION FREQUENCY (PRF)
Your gauge has an adjustable pulse repetition rate (8 Hz, 16 Hz, 32 Hz, 66 Hz, 125 Hz, 250 Hz,
333 Hz, 1000 Hz and 2000 Hz). This setting determines how fast the pulser fires. The repetition rate
is tied into the alarm LEDS. Therefore, when scanning at higher speeds, a higher repetition rate will
make the alarm trigger more responsive. It is important to note that since the screen has a maximum
refresh rate of 120Hz, any PRF settings over this maximum will not be visible on the display (in fact,
the human eye has a response rate of less than 60 Hz).
The PRF setting will automatically be overridden according to the value of RANGE you have set.
Long RANGE settings will slow down the PRF automatically.
Note: Slower PRF settings use less electrical power, therefore if your current application does notneed fast scanning speeds, selecting a slower PRF will help conserve battery life.

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To adjust the Pulse Repetition Frequency setting:
1. MENU/PRB/MAX PRF.
2. Use LEFT and RIGHT to adjust the value of MAX PRF.
3. Press MEAS to return to the measurement screen, ready to begin taking readings.
24.5 DAMPING
Your gauge has a damping function which adjusts the input impedance of the receiver. This enables
you to optimise the gauge to suit the transducer for better signal quality at various frequencies. The
damping settings are 50, 75, 100, 300, 600 and 1500 ohms.
To adjust the DAMPING setting:
1. Press MENU/PRB/DAMPING.
2. Use LEFT and RIGHT to adjust the value of DAMPING.
3. Press MEAS to return to the measurement screen, ready to begin taking readings.
24.6 FILTERS (Frequency - labelled wide)Your gauge has a range of filters; one wide band filter of 1.8 MHz to 19 MHz and narrow band filtersat 1 MHz, 2 MHz, 5 MHz and 10 MHz. The wide band option is responsive to all signals within thegiven frequency range. Narrow band filters eliminate signals outside of the target filter frequency,
and focus on the output of the transducer at the specified frequency.
To adjust the FREQUENCY setting:
1. MENU/TUNE/FREQUENCY.
2. Use LEFT and RIGHT of the right wheel to adjust the value of FREQUENCY.
3. Press MEAS to return to the measurement screen, ready to begin taking readings.
24.7 PEAK HOLD
Your gauge has a function which draws and saves the maximum waveform amplitude on themeasurement screen. This allows you to locate the maximum signal amplitude more easily while
you move the transducer over the surface in all directions.
To use the PEAK HOLD function while you are searching for flaws:
Press PEAK
To cancel PEAK HOLD:
Press CLEAR.
24.8 FREEZE WAVEFORM
Your gauge has a function which takes a snapshot of the waveform currently being displayed on
the screen. When the snapshot has been taken and the waveform is frozen on the measurement
screen, you can then safely remove the transducer from the test material without losing the current
waveform. This enables you to study the waveform in more detail. The waveform can be saved in
the internal memory of the gauge.
To FREEZE the waveform currently being displayed:
Press FREEZE.
The measurement screen displays the snapshot of the waveform.
To cancel FREEZE:
When asked for capture name, either name and save or press ESC to cancel FREEZE.

25 TRANSDUCERS FOR FLAW DETECTION
Further information on Transducers can be found on Elcometer NDT Knowledge Centre on
www.elcometerNDT.com
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SECTION : 4 FUNCTIONS & FEATURES COMMON TO ALL GAUGES
26 MEASUREMENT - RECORDING YOUR READINGSYour gauge is equipped with a data logger -. With a data file open, all your measurements are saved
into the file for later review and download to PC.
26.1 ABOUT THE DATA LOGGER
With a data file open, as you take measurements, the measurement data is stored in files in thegauge memory.
DATA LOGGER FILE FORMAT
You have a choice of two different file formats:•

Grid format: Similar to a spreadsheet format in which each cell is used to store a reading. Cells
are referenced by the row number (1 to 999) and the column label (A to ZZ).

•

Sequential format: A single column of up to 512 possible rows (readings), and a column ofcorresponding identifiers associated with each individual reading. The identifier can be a
combination of up to 10 alphanumeric/special characters (see below), however it must notstart or end with a special character. Once a start and end ID are entered into the gauge andthe log created, the gauge automatically generates all the identifiers within that range.

DATA LOGGER FILENAME CHARACTER SETS
Any combination of the following characters can be used for file names and sequential format
identifiers:•

Numeric characters: 0 - 9•

Alpha Characters: A - Z•

Special Characters: ! ' _ # space / . - ( )WHAT MEASUREMENT DATA IS SAVED
When a measurement is taken (irrespective of log file format), the following information is saved:•

The reading value.

•

A screenshot, the nature of which will depend on what view the gauge was in at the time thereading was taken. For example, if the view was in B-SCAN, then a B-SCAN screenshot will
be saved with the reading. This 'Save Graphics' option can be toggled on/off.

MEMORY CAPACITY
You can create and save as many data files as required up to the maximum capacity of the gauge
memory (32 Mbit). If you try to create a new file which exceeds the memory capacity, the gauge will
display an error message. Saved data must be deleted in order to make the space available.
Save Graphics Option

Memory Capacity(readings)

On

16 000 +Off

210 000 +56

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26.2 CREATING A NEW DATA LOGGER FILE - GRID FORMAT
To create a GRID log data file:

NEW GRID LOG

1. Select MENU/DATA/NEW.
2. Use (LEFT) or (RIGHT) keys of the right wheel tochoose between grid and sequential log types.
3. Press ENTER to continue.
4. Fill in a name and a note (if desired) for your datalogger file.
5. Select the size of the grid. Grid positions aredenoted by a number and a letter, where the letteris the column and the number is the row.
Use TOP LEFT and LOWER RIGHT to define thesize of the grid. For example, a with the TOP LEFT
set to A001 and LOWER RIGHT C003 would
produce a 3x3 grid.
The grid can have a maximum of 52 columns and999 rows.

NAME: BOILER 34
NOTE:
TOP LEFT:
LOWER RIGHT:
INCR DIR:

A001
A001
EAST

CREATE GRID?
LOG SIZE

150

TOP
LEFT
VALUE
LOG
NAME
BOILER 34

6. Set the Auto Increment direction. This option allows
you to select which direction the cursor moves aftera reading is stored in terms of compass points. For
example NORTH would move the cursor up a row,and WEST would move a column left.

0123456789! ’ _ #A001/.- ()ABCDEFGHIJKLMNOPQRSTUVWXYZ

7. Finally create the log by scrolling to CREATE LOG,
pressing ENTER and then OK to confirm.
The measurement grid is now displayed along with thegrid name on screen.

57

OK

ESC
ESC

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26.3 CREATING A NEW DATA LOGGER FILE - SEQUENTIAL FORMAT
1. To create a SEQ log data file:

NEW SEQ LOG

2. Scroll to the DATA section of the main menu.
3. Select NEW and use the (LEFT) and (RIGHT) keysof the right wheel to choose between grid andsequential log types.
4. Press ENTER to continue.
5. Fill in a name and a note (if desired) for your datalogger file. Press OK when complete.

NAME: BOILER 34
NOTE: INSP#99
START ID:
END ID:
DIRECTION:

BØØ1
CØ5Ø
EAST

6. Choose a START ID (see section 26.1).
7. Choose a END ID (see section 26.1).
8. Scroll to DIRECTION and select NONE, INCrement
or DECrement to not move or move either right orleft through the sequential log automatically when areading is saved.
9. Finally create the log by scrolling to CREATE LOG,
pressing ENTER and then OK to confirm.

CREATE LOG?
LOG SIZELOG NAME
BOILER 34

0123456789!’_# /.- ()ABCDEFGHIJKLMNOPQRSTUVWXYZ

26.4 HANDLING LOGGER FILES
Once created, logger files may be opened or closed
using the functions "OPEN" and "CLOSE”.
Closing logger files places the gauge in immediate mode
and will prevent accidental saving of data into an
inappropriate log.

OK

ESC

26.5 STORING READINGS IN A DATA LOGGER FILE
1. Create a new data logger file or open an existing file.
The grid or sequential file is displayed in the lower
half of the measurement screen.

START ADDRESS
B001

Note: Once the file is open, it will remain open until it
is closed or another file is opened. If the gauge isswitched off, the file will be opened automaticallywhen the gauge is switched on again. Press ENTER
to display the file from the measurement screen.

0123456789!’_# /.- ()ABCDEFGHIJKLMNOPQRSTUVWXYZ

2. If you want to save the reading to a particular cell
location, scroll to the desired cell.
Note: The cell location must be empty. If it alreadycontains a reading and you want to save a newreading to the same location, refer to the instructions
given in “Viewing and Deleting readings” on page 59.

OK

ESC

3. Take a reading and then press STORE or ENTER.
The reading value is saved in the file at the location selected and the cursor advances to thenext cell according to the rules set for the data logger file:•

Grid log data file only: If INCR. DIR is set to NORTH, EAST, SOUTH or WEST, the cursor
will advance one cell in the chosen direction. When the cursor reaches the last cell in therow or column it will return to the other end of the row or column.
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•

Sequential log data file only: If DIRECTION is set to INC or DEC, the cursor will advanceone cell in the chosen direction. When the cursor reaches the last cell in the column it will
return to the other end of the column.
Note: If you try to save a reading into a cell location which already contains a reading value, awarning message is displayed (see Deleting a reading).

4. Grid log data file only: To advance to a specific row number, press OK enter the row number.
Press OK to advance directly to that row number in the grid log.
5. To toggle the display between DIGITS view, RF view and B-SCAN view, press ESC.
6. If you are unable to take a measurement due to the measurement location being physicallyinaccessible, press CLR.
The cell location in the data file is marked OBST (Obstruct).
7. The display of the log data file on the measurement screen can be switched on and off:••

To switch off, press MEAS.
To switch on, press ENTER.

26.6 VIEWING AND DELETING READINGSWith a data file open:
1. Use the arrows of the left wheel to scroll through the cells in the data file.
As the cursor is moved to a different cell, the display is updated with the display view savedwith the reading (if SAVE GRAPHICS was set to YES). Readings stored in memory are
indicated by MEM in the top left corner of the measurement screen (in place of the bars of thestability indicator).
2. To delete a reading, scroll to the cell location, press CLR and then OK (or ESC to cancel).
The reading is deleted and if you wish you can now take another measurement and save thereading in this cell location.
26.7 EDITING A DATA LOGGER FILE
You can edit the following fields of data files:•

Grid files: NAME, NOTE, and INCRement DIRection.

•

Sequential files: NAME, NOTE, DIRECTION and LOG SIZE.

To edit a file:
1. Open the data file.
2. MENU/DATA/EDIT and press ENTER.
The EDIT GRID LOG (or EDIT SEQ LOG) screen is displayed and lists all the fields which canbe edited.
3. Scroll to the field you want to edit, press ENTER and then adjust the contents of the field using
the techniques previously described to create a data file - see page 57.
4. When finished, scroll to SAVE CHANGES, press ENTER and then OK (or ESC to cancel).
26.8 DELETING A DATA LOGGER FILE
1. Select MENU/DATA/DELETE ONE FILE.
2. Press ENTER.
The OPEN LOG screen is displayed and lists all the data files stored in your gauge memory.
3. Scroll through the list until the data file you want to delete is highlighted.
4. Press OK (or ESC to cancel).
The file is deleted.
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Note: This will delete all the data logger files in gauge memory - use with caution.
1. Select MENU/DATA/DELETE ALL DATA.
2. Delete all readings displayed.
3. Press ENTER and then OK to confirm (or ESC to cancel).
The data logger memory is erased - all files are deleted.

27 GAUGE SETUPSYour gauge contains 64 configurable preset locations in which you can store custom gauge setups,
each one optimised for a specific measuring application.
These gauge setups can save time when conducting routine inspections of the same job or project.
This feature also helps to eliminate error between two or more users during the setup andcalibration process.
The setups store:
•
•
•
•
•
•
•

Measurement mode
Transducer type
Gain setting
Scan mode setting
Alarm settings
Differential settings
Display type setting

As well as storing the setups in your gauge, you can also store the setups on a computer andtransfer them bi-directionally using the PC interface software included with the gauge.
The factory supplied setups stored in the gauge cover some of the more typical applications
commonly used with this type of instrument and may be modified freely by the user.
The PC interface software includes a default setup file that can be uploaded to the gauge at any
time to restore factory settings. However, you should consider saving modified setups to an empty
location rather than overwriting the factory setups in your gauge.
27.1 OPENING A SETUP
1. Select MENU/SET/OPEN.
2. Press ENTER to display the SETUP LIST BOX.
3. Scroll through the list of setups until the required
setup is highlighted.
4. Press ENTER to activate the confirmation screen.
5. Press OK to load the setup from memory.
6. Press MEAS to return to the measurement screen.

LOAD SETUP
1. EXAMPLE OF SETUP
2. TCG
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.

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27.2 SAVING AND EDITING A SETUP
Once the parameters and features have been adjusted for an application, you can save thesesettings to a specific setup location for future use.
It is sometimes necessary to rename a previously saved setup, or add additional comments abouta particular setup. The other comments about the project may also be required for additional
documentation purposes.
The following procedures outline the necessary steps for saving and editing a setup:
1. Press MENU, SET and SAVE.

SAVE SETUP

2. Press ENTER to display the Save Setup edit box.
3. Scroll to NAME and then press ENTER to edit its
value:•

When you have finished, press OK to enter thevalue.

4. If you want to add a note, repeat step 3 for NOTE.

NAME: EX#1
NOTE: INSP#99
SAVE SETUP

5. When you have finished, scroll to SAVE SETUP andpress ENTER.
The setup list screen is displayed.
6. Scroll through the list of setups until the required
location to save the setup is highlighted.

SETUP NAME

7. Press OK to activate the confirmation screen.
8. Press OK to save the Setup, or ESC to cancel.

EX#2

Note: The Name and Note parameters of a Setup can beedited at any time by repeating the Save Setup routine
described above. Therefore, the Save Setup function canalso be considered an Edit Function.

0123456789!’_# /.- ()ABCDEFGHIJKLMNOPQRSTUVWXYZ

27.3 DELETING A SAVED SETUPThis option deletes a setup file from your gauge (forexample, if it is no longer needed).
1. Press MENU, scroll to the SET menu and thenhighlight the DELETE function.

OK

ESC

2. Press ENTER to display the SETUP LIST BOX.
3. Scroll through the list of setups until the required setup is highlighted.
4. Press ENTER to activate the confirmation screen.
5. Press OK to delete the setup from memory.
27.4 USING THE DEFAULT SETUPYour gauge includes a default setup which you can use if there are no other setups stored in thegauge and you need to reset it to factory settings. This gives you the ability to load and modify abasic setup as follows:
1. Press MENU, scroll to the SET menu and then highlight the DEFAULT SETUP function.
2. Press ENTER to activate the confirmation screen.
3. Press OK to confirm.

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28 DATA TRANSFER SOFTWARE
Software is available which allows data to be transferred from your gauge to a PC. Presently
Elcometer supplies ElcoMaster™ software for this purpose.
To set-up other types of communications software:
1. Start the communications software.
2. Configure the software using the following parameters:
Data Bits - 8, Parity - None, Stop Bits - 1, Baud Rate 1200 (to print a report), or 9600 totransfer data file.
Note: A report can be printed to a communications program (i.e. HyperTerminal), or printed toa serial printer using A4 or 8.5" x 11" paper.
3. Set the communications software COM port to the port number that the gauge is connected to.
28.1 TRANSFERRING MEASUREMENT DATA TO YOUR COMPUTER
RS-232 CONNECTORThe RS-232 connector, located on the bottom end cap of the gauge, is a 2 pin female Lemo
connector. It is designed to connect directly from the gauge to a standard AT serial port on a PC. A
Lemo to 9 pin serial cable is supplied with the gauge.
Note: This connector is also used to upgrade the gauge with the latest version of firmware.
USB TO SERIAL CONVERTER
New laptop computers do not have standard serial ports. In this case, use the USB to Serial
converter supplied with the gauge.
COMPUTER SYSTEM REQUIREMENTS
ElcoMaster™ is compatible with any Windows computer system running Windows XP or above.
USING THE XFER MENUThe XFER menu of your gauge is used in conjunction with ElcoMaster™. The steps below outline
the procedure for accessing the XFER menu and basic operation as follows:
1. Scroll to the XFER section of the main menu.
2. Press ENTER to activate the option selected.
3. Once the Backup or Restore function has been completed, press MEAS once to return to themenu items, or twice to return to the measurement mode.

29 STORAGE
Your gauge has a Liquid Crystal Display. If the display is heated above 50°C (120°F) it
may be damaged. This can happen if the gauge is left in a car parked in strong sunlight.
Always store the gauge in its case when it is not being used.
If the gauge is to remain unused for long periods of time, remove the batteries and store
them separately. This will prevent damage to the gauge in the event of malfunction of
the batteries.

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30 MAINTENANCE
You own one of the finest corrosion gauges in the world. If looked after, it will last a lifetime.
30.1 FAULTSYour gauge is designed to give many years reliable service under normal operating and storage
conditions. The gauge does not contain any user-serviceable components. In the unlikely event ofa fault, the gauge should be returned to your local Elcometer NDT supplier or directly to Elcometer
NDT. The warranty will be invalidated if the instrument has been opened.
30.2 TRANSDUCER
The transducer will wear with repeated use. Transducer life depends on the number ofmeasurements taken and the manner in which readings are taken. To extend transducer life,
always set the transducer down so that it is perpendicular to the panel surface. Dragging thetransducer along the surface will reduce the life of the transducer. Replacement transducers areavailable from your local Elcometer NDT supplier or directly from Elcometer NDT.

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31 TECHNICAL SPECIFICATION
31.1 PERFORMANCE
Range

Pulse-Echo P-E

0.63 mm to 30.48 m (0.025” to 100 ft)

Pulse-Echo Coating PECT

Material: 0.63 mm to 30.48 m (0.025” to 100 ft)
Coating: 0.01 mm to 2.54 mm (0.001” to 0.100”)

Pulse-Echo Temp CompPETP

0.63 mm to 30.48 m (0.025” to 100 ft)

Echo-Echo E-E

1.27 mm to 102 mm (0.050” to 4.0”)
Range will vary +/- depending on the coating.

Echo-Echo Verify E-EV

1.27 mm to 25.4 mm (0.050” to 1.0”)
Range will vary +/- depending on the coating.

Coating Only CT

0.0127 mm to 2.54 mm (0.0005” to 0.100”)
Range will vary +/- depending on the coating.

Resolution

0.01 mm (0.001")

Velocity Range

254.9 m/s to 16000 m/s (0.01 in/µs to 0.63 in/µs)

31.2 PHYSICAL
Weight (including batteries)

2040 g (4.5lbs)

Dimensions (W x H x D)

216 mm x 165 mm x 70 mm (8.5” x 6.5” x 2.5”)

Gauge Operating
Temperature-10°C to 60°C (14°F to 140°F)

Case

Aluminium case design with gasket sealed end caps, waterproof
membrane keypad.

Data Output

Bi-directional RS232 serial port. Windows PC interface software.
USB1.1

Display

QVGA TPT colour display (320 x 240 pixels).
60 Hz screen refresh rate.
Viewable area 115.2 x 86.4mm (4.54 x 3.40”) 144.78 (5.7”)
diagonal.
Adjustable brightness, colour scheme and auto dim time.

Power Source

Lithium Ion pack 10.8V, 2 amp hrs, typical operation 18 hours.
Battery backup life: Six 1.5V Alkaliine 12 hours, Nicad 5 hours
and NI-MH 12 hours, with default settings.
Note: Alkaline cells must be disposed of carefully to avoid
environmental contamination. Please consult your local
environmental authority for information on disposal in your region.
Do not dispose of any cells in fire.

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32 WARRANTY
Elcometer NDT warrants your gauge against defects in materials and workmanship for a period of
two years from receipt by the end user.
Additionally, Elcometer NDT warrants transducers and accessories against such defects for aperiod of 90 days from receipt by the end user. If Elcometer NDT receives notice of such defects
during the warranty period, Elcometer NDT will either, at its option, repair or replace products thatprove to be defective. The warranty will be invalidated if the instrument has been opened.
32.1 EXCLUSIONS
The above warranty shall not apply to defects resulting from: improper or inadequate maintenanceby the customer; unauthorised modification or misuse; or operation outside the environmental
specifications for the product.
Elcometer NDT makes no other warranty, either express or implied, with respect to this product.
Elcometer NDT specifically disclaims any implied warranties of merchantability or fitness for aparticular purpose. Some states or provinces do not allow limitations on the duration of an implied
warranty, so the above limitation or exclusion may not apply to you. However, any implied warrantyof merchantability or fitness is limited to the two-year duration of this written warranty.
This warranty gives you specific legal rights, and you may also have other rights, which may varyfrom country to country, state to state or province to province.
32.2 OBTAINING SERVICE DURING WARRANTY PERIOD
If your hardware should fail during the warranty period, contact Elcometer NDT and arrange forservicing of the product. Retain proof of purchase in order to obtain warranty service.
For products that require servicing, Elcometer NDT may use one of the following methods:•

Repair the product•Replace the product with a re-manufactured unit•

Replace the product with a product of equal or greater performance•

Refund the purchase price32.3 AFTER THE WARRANTY PERIOD
If your hardware should fail after the warranty period, contact Elcometer NDT for details of theservices available, and to arrange for non-warranty service.

33 SPARES & ACCESSORIES
33.1 TRANSDUCERS
Elcometer NDT gauges are not supplied with a transducer as standard - this must be orderedseparately.
The transducers listed below are the most commonly used however, Elcometer NDT offer a wide
range of other transducers to suit various applications.
Further information on the transducers available and their applications can be found on the
Elcometer NDT Knowledge Centre on www.elcometerNDT.com
Description
2.25 MHz 1/2” Lemo Single Element Contact High Wear Transducer, Medium Damped

5.00 MHz 3/4” x 3/4” Microdot Standard Shear Wave Transducer, High Gain
3.50 MHz 3/4” BNC Single Element Contact High Wear Composite Transducer,
Medium Damped
2.25 MHz 1/4” Microdot Side Mini Angle Beam Transducer, 45 Degree

65

Sales Part No.
TF2M25EM-2
TF5M00GGG-2
TF3M50GM-1
TF2M25C45M

en
5.00 MHz 3/8” Microdot Side Mini Angle Beam Transducer, 60 Degree
10 MHz 3/16” Microdot Side Mini Angle Beam Transducer, 70 Degree

TF5M00D60M
TF10M0B70M-

33.2 CALIBRATION BLOCKS
Elcometer NDT offer a comprehensive range of calibration blocks to suit a wide range ofapplications and standards.
Selecting the correct calibration block for the application is essential to ensure accurate evaluation.
The form, shape and material of the calibration block should be appropriate for the material being
inspected. Any artificially induced flaw should closely resemble that of the actual flaw being testedfor.
The calibration blocks listed below are a selection of those available - details of the full range canbe found on www.elcometerNDT.com
Description
Calibration Block: 8 Step; 1 - 8mm

Sales Part No.
TW-24005-*

Calibration Block: 10 Step; 2 - 20mm

TW-24006-*

Calibration Block: 10 Step; 2.5 - 25mm

TW-24007-*

Replace * with S1018 = 1018 Steel Block; A = Aluminium Block; SS = Stainless Steel Block;
T = Titanium Block.
33.3 ULTRASONIC COUPLANT
Each gauge is supplied with a 120ml (4 fl oz) bottle of standard ultrasonic couplant. Replacement
bottles and couplant for high temperature applications are available from your local Elcometer NDT
supplier or directly from Elcometer NDT.
Description
Ultrasonic Couplant, 120 ml (4 fl oz)
Ultrasonic Couplant, 360 ml (12 fl oz)
Ultrasoni Couplant, High Temperature 510°C (950°F), 60 ml (2 fl oz)

Note: A wide range of otherwww.elcometerNDT.com for details.

transducers

andaccessories

Sales Part No.
TC-24034-1
TC-24034-2
TC-24034-9

isavailable-see

33.4 MISCELLANEOUS
Description

RS232 Cable USB to Serial Converter

Sales Part No.
TL-24031

34 CONDITION AND PREPARATION OF SURFACES
Further information on Transducers can be found on the Elcometer NDT Knowledge Centre on
www.elcometerNDT.com

35 APPLICATION
Further information on Applications can be found on the Elcometer NDT Knowledge Centre on
www.elcometerNDT.com

66

en
36 SOUND VELOCITIES OF COMMON MATERIALS
Material
Aluminium
Beryllium
Brass
BronzeCadmium
Columbium
CopperGlass (Plate)
Glycerine
Gold
InconelIron
Iron (Cast)
Lead
Magnesium
Mercury
Molybdenum
Monel
NickelNylon
Platinum
Plexiglas
Polystyrene
PVC
Quartz Glass
Rubber, Vulcanised
SilverSteel (1020)
Steel (4340)
Steel, Stainless
TeflonTin
Titanium
Tungsten
Uranium
Water
Zinc
Zirconium

67

L-Wave Velocity
in/µs)

L-WaveVelocitym/s

S-WaveVelocity
in/µs)

Sound Velocity
m/s

0.250
0.580
0.173
0.139
0.109
0.194
0.183
0.227
0.076
0.128
0.229
0.232
0.180
0.085
0.230
0.057
0.246
0.211
0.222
0.106
0.156
0.106
0.092
0.094
0.226
0.091
0.142
0.232
0.233
0.223
0.054
0.131
0.240
0.204
0.133
0.058
0.166
0.183

6375
12903
4394
3531
2769
4928
4648
5766
1930
3251
5817
5893
4572
2159
5842
1448
6248
5359
5639
2692
3962
2692
2337
2388
5740
2311
3607
5893
5918
5664
1372
3327
6096
5182
3378
1473
4216
4648

0.124
0.305
0.083
0.088
0.059
0.083
0.089
0.135
0.047
0.119
0.127
0.087 - 0.126
0.028
0.120
0.132
0.107
0.117
0.043
0.066
0.050
0.042
0.087
0.036
0.128
0.128
0.123
0.250
0.066
0.123
0.113
0.078
0.095
0.089

3130
8880
2120
2235
1500
2100
2260
3430
1194
3020
3230
2200-3220
700
3050
3350
2720
2970
1090
1670
1270
1060
2210
1590
3240
3240
3120
6350
1670
3120
2870
1980
2410
2250

en
37 THE MENU COMMANDS - THICKNESS GAUGE
Menu (Thick.)
PRB(PROBE)CAL(CALIBRATION)

Function

Description

ZERO PROBE

Zeros your gauge in much the same way that a mechanicalmicrometer is zeroed. If your gauge is not zeroed correctly,
all of the measurements made may be in error by somefixed value. You can choose between automatic zero or
manual zero.

ZERO COATING

In order to account for very slight electronic differences intransducers of the same type, frequency, and diameter,
your gauge includes this "zero coating" feature. Thisfeature enables your gauge to obtain very accurate
readings on coatings, eliminating potential errors incurredfrom slight differences in the transducer manufacturing
processes.

TYPE

Use this function to select the type of transducer being
used from a chart of transducer types. This provides
increased linearity between transducers.

MAT

Select the material velocity from a chart of basic material
types when a known sample thickness, or material velocity
cannot be obtained.

MATL 1PT

Performs a single point calibration. This function allows you
to automatically calculate the velocity by entering a known
sample thickness.

MATL 2PT

Performs a two-point calibration. This function allows you to
automatically calculate the velocity by entering a second
known sample thickness.

VELOCITY

This function calibrates your gauge by setting the velocity
to a known material velocity.

COATING 1PT

Performs a single point coating calibration. This function
allows you to automatically calculate the velocity bymeasuring a known coating sample thickness.

COATING 2PT

Performs a two-point coating calibration. This function
allows you to automatically calculate the velocity byentering a second known coating sample thickness.

COATING VEL

This function calibrates your gauge to a specific coating
material type by entering a coating velocity.

68

enMenu (Thick.)
DISP(DISPLAY)

TUNE

69

Function

Description

VIEW

Choose between RF wave, RECT (rectified) wave, BSCAN(cross section), and DIGITS (large digits) views.

DELAY(B-START)

Adjust where the left side of the display window starts
according to thickness, in inches or millimetres.

RANGE(B-DEPTH)

Set the overall depth of the viewable measurement area. It
functions a lot like a zoom on a camera.

B-SCAN SPEED

Adjusts the scroll speed of the B-Scan.
Scale is 0-10 where 10 is the fastest. Default setting: 6.

UNITS

Toggle between Metric (millimetres) or English (inches)
units.

BRIGHTNESS

Adjusts the brightness of the display.
Scale is 0-20 where 20 is the brightest.

COLORS

Choose the display colour scheme (from a choice of 12).

DIM

Conserve battery life by dimming the display after idle for a
specific amount of time: OFF, 30, 60, 90, 120 seconds.
Pressing any key will restore the screen brightness.

RECT WAVE

Toggles between an outlined or filled view option when thedisplay setting is in RECT (rectified) wave mode.

DETECT MARK

Choose the format of the vertical line on the RF and RECT
measurement screens which shows the detection point:Line, Box, Dots, None.

MEASURE
MODE

Choose which measurement mode to use.

POLARITY

The gauge operates on a zero crossing detection principle.
This feature toggles which stroke of the cycle the crossing
detection uses, either positive or negative.

PULSE

Your gauge has adjustable pulse width (SPIKE, THIN, or
WIDE) for both high penetration and resolution
applications. The pulse width refers to the duration of time
the pulser is on.

PULSER VOLT

Provides a 50 V cut/boost to the pulser. The standard
setting is 150 V. Provides greater penetration for difficult
material types, or increased resolution on noisy materials.

DAMPING

Provides multiple input impedances to match the
impedance of the transducer and therefore optimisetransducer performance.

GAIN

Increases or decreases the overall amplitude of the signal.
Gain is similar to the volume control on a stereo receiver.

AGC

When operating in E-E or E-EV mode, the gauge adjusts
the gain automatically. Alternatively, the AGC can be
manually controlled.

en
Menu (Thick.)
GT1(GATE 1)GT2(GATE 2)GT3(GATE 3)SET
(SETUP)

Function

Description

START

Sets the start of the gate, according to time/distance.

GATE1 WIDTH

Sets the overall width of the gate, in terms of distance, fromthe starting value of Gate1

THRESHOLD1

Sets the sensitivity level of Gate1. The amplitude of thesignal must reach or exceed this threshold level before ameasurement is detected.

GATE2 WIDTH

Sets the overall width of the gate, in terms of distance, fromthe starting value of HOLDOFF 2.

HOLDOFF 2

Delay the starting point of Gate2 a specific distance from thefirst detection point found inside of the boundaries of theGate 1 settings. If no detection is found, the value of GATE1WIDTH is used as a starting value for Gate2.

THRESHOLD2

Sets the sensitivity level of Gate2. The amplitude of thesignal must reach or exceed this threshold level before ameasurement is detected.

GATE3 WIDTH

Sets the overall width of the gate, in terms of distance, fromthe starting value of HOLDOFF 3.

HOLDOFF 3

Delay the starting point of Gate3 a specific distance from thefirst detection point found inside of the boundaries of theGate2 settings. If no detection is found, the value of GATE2WIDTH is used as a starting value for Gate3.

THRESHOLD3

Sets the sensitivity level of Gate3. The amplitude of thesignal must reach or exceed this threshold level before ameasurement is detected.

OPEN

Displays a list of factory and user-defined setups currently
stored in memory. These setups can be recalled and used
at any time.

SAVE

Save a custom setup that you have modified or created.

DELETE

Delete specific setups previously saved in memory.

DEFAULT
SETUP

Loads a basic default setup. Use only as a last resort if the
setups in your gauge have been corrupted and a computeris not accessible.

LANGUAGE

Select the menu language.

70

enMenu (Thick.)
DATA

Function

Description

NEW

Creates a new alpha numeric grid, or sequential log filewith auto identifiers. You can customise the grid orsequential log file according to your requirements.

EDIT

Modify the parameters of grid or sequential files previously
saved.
Note: Predefined coordinates cannot be changed once they
have been created.

UTIL(UTILITIES)

71

OPEN

Recalls existing grids or sequential log files from gauge
memory.

CLOSE

Closes a currently opened grid or sequential log file.

DELETE ONE
FILE

Deletes a selected grid or sequential log file from memory.

DELETE ALL
DATA

Deletes all files currently stored in memory.

AUTO FIND

Automatically locates the detection point
measurement is out of the viewable display area.

SCAN MODE

Enables a high speed scan mode that increases the overall
sample rate from 65 to 200 measurements per second,
depending on the current measurement mode used.

if

the

ALARM

Toggles alarm mode ON, OFF, or AUDIBLE.

ALARM HIGH

Sets the HI limit parameter. If the measurement exceeds
this value, a red light will illuminate and the alarm willsound.

ALARM LOW

Sets the LOW limit parameter. If the measurement falls
below this value, a red light will illuminate and the alarm willsound.

DIFFERENTIAL

Sets a nominal value and your gauge will display +/- thedifference from this nominal value.

GAUGE

Set gauge type; THICKNESS GAUGE, FLAW DETECTOR
or REQUEST.
When set to REQUEST, the gauge will ask which mode isrequired whenever it is switched on.

KEY CLICK

Sets the volume of beeps occurring with each key press.

SET DATE

Allows date to be changed.

enMenu (Thick.)
XFER(transfer)

Function

Description

BACKUP
SETUPS

Allows you to backup the setups currently stored in yourgauge to a computer via the RS232 port.

COPY DATA

Allows you to transfer data to an external sd card if installed.

COPY SCREEN

Allows you to transfer a screen shot to an external sd card if
installed.

UPGRADEGAUGEAllows you to upgrade firmware via the Elcometer Website,www.elcometerNDT.com

CAPTUREFILE

TO Allows you to save data to internal memory.

STORAGE

Allows you to choose internal or external memory storage.

ABOUT

Displays information covering the instrument Firmware
details, Serial Number and FPGA version.

72

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38 THE MENU COMMANDS - FLAW DETECTOR
Menu (Flaw Det.)
PRB(Probe)CAL(Calibration)

73

Function

Description

TYPE

Select the type of transducer being used (SINGLE or
DUAL).

PULSE

Your gauge has adjustable pulse width for both highpenetration and resolution applications. The pulse widthrefers to the duration of time the pulser is on. The options
are SPIKE, THIN, and WIDE.

MAX PRF

Controls the gauge pulse frequency. The maximum
frequency is 333 Hz, however, the gauge automaticallyadjusts the PRF according to the delay and range
settings; the larger the range, the slower the pulse
frequency will be.

DAMPING

Provides multiple input impedances to match the
impedance of the transducer and therefore optimisetransducer performance.

PULSERVOLTAGE

Provides a 50 V cut/boost to the pulser. The standard
setting is 150 V. Provides greater penetration for difficult
material types, or increased resolution on noisy materials.

MAT

Select the material velocity from a chart of basic material
types when a known sample thickness or material
velocity cannot be obtained.

MATL 1PT

Performs a single point calibration. This function allows
you to automatically calculate the velocity by entering aknown sample thickness.

MATL 2PT

Performs a two-point calibration. This function allows you
to automatically calculate the velocity by entering asecond known sample thickness.

VELOCITY

This function calibrates your gauge by setting the velocity
to a known material velocity.

ZERO

Zeros the transducer and calibrates the screen (similar tozeroing a mechanical micrometer).

enMenu (Flaw Det.)
DISP(Display)

TUNE

Function

Description

VIEW

RF, +RECT, -RECT or RECTFW.

DELAY

Adjust where the left side of the display window starts
according to thickness, in inches or millimetres.

RANGE

Set the overall depth of the viewable measurement area.
It functions a lot like a zoom on a camera.

UNITS

Toggle between Metric (millimetres) or English (inches)
units.

BRIGHTNESS

Adjusts the brightness of the display.
Scale is 0-20 where 20 is the brightest.

COLORS

Choose the display colour scheme (from a choice of 12).

DIM

Conserve battery life by dimming the display after idle fora specific amount of time: OFF, 30, 60, 90, 120 seconds.
Pressing any key will restore the screen brightness.

RECT WAVE

Toggles between an outlined or filled view option when
the display setting is in RECT (rectified) wave mode.

DETECT MARK

Choose the format of the vertical line on the RF and
RECT measurement screens which shows the detection
point: Line, Box, Dots, None.

FREQUENCY

The gauge is a wide band flaw detector with a frequency
range of 1.8 MHz to 19 MHz (-3dB). The gauge also has
selectable narrow band filters at 2 MHz, 5 MHz and 10
MHz.

GAIN

Increases or decreases the overall amplitude of thesignal.
Gain is similar to the volume control on a stereo receiver.

GAIN STEP

Increases or decreases the gain size.

DETECT MODE Sets the detection mode; PEAK, FLANK or Z-CROSS(zero crossing).

74

enMenu (Flaw Det.)
GT1(Gate 1)

Function

Description

ALARM 1

Toggles the alarm function of Gate1; ON, OFF or
AUDIBLE.
The audible feature sounds a beeper when the waveform
breaks the threshold level, either above or below,
depending on the current DETECT setting.

DETECT

Set the alarm detection to occur either ABOVE or
BELOW the gate THRESHOLD value.

GATE1

Sets the start of the gate, according to depth/thickness.

GATE1 WIDTH

Sets the overall width of the gate, in terms of distance,from the starting value of Gate1.

THRESHOLD1

Sets the sensitivity level of Gate1. Used in conjunction
with the DETECT setting, THRESHOLD acts as the trigger
point for the alarm.

POLARITY

The gates can be set to detect on either the positive or
negative polarity (stroke) of the half or full wave cycle.
Note: If VIEW is set to positive, and the gate negative, thegauge will not display an amplitude percentage of fullscreen height.

GT2(Gate 2)The GT2 functions are the same as those for GT1.

TRIG
(Trigonometry)

TRIG

Toggles trigonometry function ON or OFF.
This function is used with angle beam transducers for theinspection of welds, to calculate three measurements:
Beam path distance, Surface distance and Depth from theindex point of the transducer.

THICKNESS

Sets the thickness of the test material. The thickness will
be used to determine which skip/leg the gauge is detecting
on.

ANGLE

Sets the angle of the transducer. This value is used in thecalculations above.

X-OFFSET

Calculates the surface distance in the trigonometryfunction, as a physical measurement from the index pointof the probe to the front of the wedge/can/shoe/case.

CSC OD

Curved surface correction value to compensate forchanging sound path distance and angle. This value isused in conjunction with the THICKNESS value in order tocalculate a correction factor.

75

enMenu (Flaw Det.)AWS(American Welding Society)

TCG(Time Corrected
Gain)

DAC
(Distance Amplitude Correction)

Function

Description

AWS

Toggles AWS function ON or OFF.
This function is used in the analysis of welds according to
the American Welding Society’s structural welding code
D1.1-94 to calculate the Indication Rating (IR).

REF GAIN

The gain (in dB) required to set the indication level to a
specific percentage of full screen height (FSH).

% SCRNHEIGHT

Set the reference level of the AWS as a percentage of fullscreen height. This value will typically be set somewhere
between 20% to 90%.

TCG

Toggles TCG function ON or OFF.
This function displays reflectors of equal size at equal
A-Scan amplitudes, regardless of the depth of the reflector
in the test material.

DRAW

Toggles DRAW mode ON or OFF and used to draw theTCG curve.

CURVE

Toggles drawing of the TCG correction curve on thescreen ON or OFF.

% SCRNHEIGHT

Set the reference level of the TCG as a percentage of fullscreen height.

DAC

Toggles DAC function ON, OFF or AUDIBLE.
A Distance Amplitude Correction (DAC) curve is used toconfigure a variable threshold for the gate, using the same
size reflector at different distances.

DRAW

Toggles DRAW mode ON or OFF and used to draw theTCG curve.

MEAS

Toggles the units displayed as a relationship of either thesignal amplitude and DAC curve, or just the signal
according to screen height. The units are %FSH, %DAC,
and dB.

CURVE

Selectable signal or multi DAC curve options. The
displayed curve options are: DAC, -2dB, -6dB, -10dB,(-6dB/-12dB), (-6dB/-14dB). Once the DAC curve has
been generated, these options can be toggled at any time.

TRIGGER

Used to set the alarm threshold for the DAC curve. The
options are; at DAC, -2dB, -6dB, -10dB, -12dB, -14dB, or
using an independent gate. The list of trigger options willchange according to which CURVE option has been
selected.

POLARITY

Select the polarity of the DAC curves generated, either
positive or negative.

76

enMenu (Flaw Det.)
DGS (Distance,
Gain Size)

77

Function

Description

DGS

Toggles DGS function ON or OFF.
This function is used to provide an effective defect size ofa detected defect within a test object.

REFERENCE
GAIN

Enables the reference gain using a given reflector from acalibration standard.

TRIGGER
CURVE

Enables the User to set the detection curve to either DGS
or GATE. This will be the curve used to trigger the alarms
and display the effective reflector size (ERS) during theinspection process.

EFFECTIVE
PROBE
DIAMETER

A variable used to calculate the near field length of agiven transducer, and determine the defect size. The
effective diameter will be noted on the transducer
calibration certificate for a standard DGS transducer.
However, this can be estimated using the formulas
outlined in section “Estimating effective diameter” onpage 50.

PROBEFREQUENCY

Refers to the centre frequency of the transducer being
used, and used in the calculation of the near field length.

CURVE SIZE
(ERS)

Used to select which curve will be used, based on thereflector size, from the DGS(AVG) chart on page 52. If thevalue entered is not an exact curve value represented in
the diagram, the gauge will compare and interpolate
between the two closest curves, and mathematicallyderive a curve for that value.

ATTENUATION

Used to additionally compensate other factors leading to
the loss of sound/energy. Refer to section “Attenuation
Parameters” on page 53 for more information on theattenuation parameters. If all the attenuation values are
set to zero, the attenuation feature will display off.

DELAY
VELOCITY

The longitudinal velocity of the delay line, most commonlyused with angle beam style probes, but also used with 90
degree compression probes. It is important to note that inorder for this to be accurate, the 'probe zero' must be
accurate. This is easily accomplished by performing a two
point calibration (auto calibration).

REFERENCE
TYPE

This option enables the user to select the type of reflector
that will be used during calibration and setup. The options
are Back Wall, Flat Bottom Hole (FBH), or Side Drilled
Hole (SDH).

REFERENCE
SIZE

Assuming the reference type selected is either FBH or
SDH, the User will be required to enter the size of thereference reflector.

enMenu (Flaw Det.)
SET(Setup)DATAFunction

Description

OPEN

Displays a list of factory and user-defined setups
currently stored in memory. These setups can be recalled
and used at any time.

SAVE

Save a custom setup that you have modified or created.

DELETE

Delete specific setups previously saved in memory.

DEFAULT
SETUP

Loads a basic default setup. Use only as a last resort if
the setups in your gauge have been corrupted and acomputer is not accessible.

LANGUAGE

Select the menu language.

NEW

Creates a new alpha numeric grid, or sequential log filewith auto identifiers. You can customise the grid orsequential log file according to your requirements.

EDIT

Modify the parameters of grid or sequential files
previously saved.
Note: Predefined coordinates cannot be changed once
they have been created.

UTIL(UTILITIES)OPEN

Recalls existing grids or sequential log files from gauge
memory.

CLOSE

Closes a currently opened grid or sequential log file.

DELETE ONE
FILE

Deletes a selected grid or sequential log file frommemory.

DELETE ALL
DATA

Deletes all files currently stored in memory.

AUTO FIND

Automatically locates the detection point if
measurement is out of the viewable display area.

the

SET DATE

Allows date to be changed.

KEY CLICK

Sets the volume of beeps occurring with each key press.

GAUGE

Set gauge type; THICKNESS GAUGE, FLAWDETECTOR or REQUEST.
When set to REQUEST, the gauge will ask which mode isrequired whenever it is switched on.

COMPAREThe compare feature enables an operator the ability tolocate and establish a reference waveform from a flaw inan existing or manufactured sample and send it to thebackground on the display in a colour other than theactive waveform colour. The reference waveform willremain in the background for the duration of inspection
process, or until cleared. This feature can be useful wheninspecting for a common flaw in a specific object, locationand position.

78

en
Menu (Flaw Det.)
XFER(transfer)

Function

Description

BACKUP
SETUPS

Allows you to backup the setups currently stored in yourgauge to a computer via the RS232 port.

COPY DATA

Allows you to transfer data to an external sd card if
installed.

COPY SCREEN Allows you to transfer a screen shot to an external sd card
if installed.
UPGRADEGAUGE
CAPTURE
FILE

79

Allows you to upgrade firmware via the Elcometer
Website, www.elcometerNDT.com
TO Allows you to save data to internal memory.

STORAGE

Allows you to choose internal or external memory storage.

ABOUT

Displays information covering the instrument Firmware
details Serial Number and FPGA version.