Translation of the original operating instructions

T-Guard2
Leak Detector

Catalog No.
540-200, 540-201
From software version
V 2.41

jina85en1-14-(2211)

INFICON GmbH
Bonner Strasse 498
50968 Cologne, Germany

INFICON

Table of contents

Table of contents
1 About this manual .......................................................................................................................................... 6
1.1 Target groups........................................................................................................................................... 6
1.2 Warnings .................................................................................................................................................. 6
2 Safety............................................................................................................................................................... 7
2.1 Intended use ............................................................................................................................................ 7
2.1.1 Incorrect usage ............................................................................................................................. 7
2.2 Duties of the operator............................................................................................................................... 7
2.3 Owner requirements................................................................................................................................. 7
2.4 Dangers.................................................................................................................................................... 8
3 Scope of delivery, transport, storage......................................................................................................... 10
4 Description.................................................................................................................................................... 12
4.1 Function ................................................................................................................................................. 12
4.2 Design of device..................................................................................................................................... 13
4.3 Accessories (not included in the shipment)............................................................................................ 17
4.3.1 Control unit.................................................................................................................................. 18
4.3.2 Control unit connection cable...................................................................................................... 18
4.3.3 Connector mated set................................................................................................................... 19
4.3.4 Fore pump................................................................................................................................... 19
4.3.5 Measurement and reference line ................................................................................................ 19
4.3.6 I•STICK ....................................................................................................................................... 19
4.4 Technical specifications ......................................................................................................................... 20
4.4.1 Mechanical data.......................................................................................................................... 20
4.4.2 Ambient conditions...................................................................................................................... 20
4.4.3 Electrical data ............................................................................................................................. 21
4.4.4 Physical data............................................................................................................................... 21
4.4.5 Factory settings........................................................................................................................... 22
5 Installation .................................................................................................................................................... 23
5.1 Setup...................................................................................................................................................... 23
5.2 Operating modes and measurement setup............................................................................................ 25
5.2.1 Measurement setup for accumulation measurement.................................................................. 26
5.2.2 Carrier gas measurement setup ................................................................................................. 28
5.3 Connecting an external control unit........................................................................................................ 30
5.4 Connecting to the power supply system ................................................................................................ 31

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5.5 Connecting the PLC inputs to the electrical system............................................................................... 32
5.6 Connecting the PLC inputs to the electrical system............................................................................... 33
5.7 Connecting the analogue outputs to the electrical system..................................................................... 35
5.8 Connecting to a PC ................................................................................................................................ 35
5.9 Connecting measurement, reference and vacuum lines........................................................................ 36
6 Operation ...................................................................................................................................................... 37
6.1 Switching on........................................................................................................................................... 37
6.2 Warm-up phase...................................................................................................................................... 37
6.3 Display and keys on the control unit ...................................................................................................... 37
6.3.1 Recurring function symbols......................................................................................................... 38
6.3.2 Measurement display elements .................................................................................................. 39
6.4 Basic settings ......................................................................................................................................... 40
6.4.1 Setting the language and date .................................................................................................... 40
6.4.2 Selecting a pressure unit ............................................................................................................ 41
6.4.3 Setting the display....................................................................................................................... 41
6.4.4 Calibrate...................................................................................................................................... 42
6.4.4.1

Accumulation measurement .............................................................................................. 43

6.4.4.2

Carrier gas measurement .................................................................................................. 44

6.4.4.3

Check the calibration ......................................................................................................... 45

6.4.5 Selecting the control location ...................................................................................................... 45
6.4.6 Setting up user authorization ...................................................................................................... 46
6.5 Operation modes.................................................................................................................................... 47
6.5.1 Accumulation measurement ....................................................................................................... 47
6.5.2 Carrier gas measurement ........................................................................................................... 49
6.5.3 Continuous measurement........................................................................................................... 51
6.6 Settings for the measurements .............................................................................................................. 51
6.7 Starting the measurement...................................................................................................................... 55
6.8 Helium contamination............................................................................................................................. 56
6.9 Standby .................................................................................................................................................. 56
6.10 Switch off................................................................................................................................................ 57
6.11 Calling up information on the device and on the measurement ............................................................. 57
7 Controlling the device using interfaces ..................................................................................................... 59
7.1 Controlling using PLC ............................................................................................................................ 59
7.1.1 Allocation of functions for PLC input ........................................................................................... 59
7.1.2 Allocation of functions for PLC output......................................................................................... 61iv

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Table of contents

7.1.3 Acumulation measurement using PLC........................................................................................ 64
7.1.4 Carrier gas measurement using PLC.......................................................................................... 65
7.2 Controlling using RS-232 ....................................................................................................................... 66
7.3 Configuring analog outputs .................................................................................................................... 67
8 Save parameters........................................................................................................................................... 70
9 F.A.Q. - Frequently Asked Questions......................................................................................................... 72
10 Warning and error messages...................................................................................................................... 74
11 Maintenance.................................................................................................................................................. 80
11.1 Replacing the inlet filter.......................................................................................................................... 80
11.2 Replacing filter mat on bottom of device ................................................................................................ 81
12 Decommissioning ........................................................................................................................................ 83
12.1 Disposal ................................................................................................................................................. 83
12.2 Sending in the device............................................................................................................................. 83
13 Declaration of Contamination ..................................................................................................................... 85
14 Declaration of Conformity ........................................................................................................................... 86
15 China RoHS................................................................................................................................................... 87
16 Accessories .................................................................................................................................................. 88
Index .............................................................................................................................................................. 89

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1 | About this manual

INFICON

1 About this manualThis document applies to the software version stated on the title page. Documents forother software versions are available from our sales department.
Product names may occur in the document, which are added for identification
purposes only and belong to the respective owner of the rights.

1.1 Target groups
This instruction manual is intended for operators and technically qualified personnel
with experience in leak detection technology and the integration of leak detectors inleak detection systems. In addition, the installation and use of the device require
knowledge of electronic interfaces.

1.2 Warnings
DANGER
Imminent hazard resulting in death or serious injuries

WARNING
Hazardous situation resulting in potential death or serious injuries

CAUTION
Hazardous situation resulting in minor injuries

NOTICE
Hazardous situation resulting in damage to property or the environment

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Safety | 2

2 Safety
2.1 Intended use
The device is a helium leak detector. You can use the device to quantify leaks on test
objects.
The device operates with simple chambers under atmospheric pressure. No vacuum
chamber is required.
• Operate the device exclusively in accordance with the operating instructions.
• Comply with application limits, see "Technical Data". You will find the technicaldata in the digitally available operating manual.
The smallest detectable leakage rate is 1 × 10-6 mbar l/s, measured in ordinary air.
The leakage rate depends on the volume of the measuring chamber and themeasuring time. For practical reasons, the leak rate is usually between 1 × 10-4 and 1
× 10-2 mbar l/s.
The device may only be opened by INFICON service.

2.1.1 Incorrect usage
Avoid the following unintended uses:• Use outside the technical specifications, see "Technical Data". You will find thetechnical data in the digitally available operating manual.
• Installation by untrained or unauthorized personnel• Suctioning of liquids into the device• Using the device in potentially explosive atmospheres• Test of test objects that contain liquids.

2.2 Duties of the operator• Read, observe, and follow the information in this manual and in the work
instructions provided by the owner. This concerns in particular the safety andwarning instructions.
• Always observe the complete operating instructions for all work.
• If you have any questions about operation or maintenance that are not answeredin this operating instructions, contact customer service.

2.3 Owner requirements
The following notes are for companies or any person who is responsible for the safety
and effective use of the product by the user, employees or third parties.

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2 | Safety

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Safety-conscious operation• Operate the device only if it is in perfect technical condition and has no damage.
• Only operate the device properly in accordance with this instruction manual, in asafety and risk conscious manner.
• Adhere to the following regulations and observe their compliance:– Intended use– Universally valid safety and accident prevention regulations– International, national and local standards and guidelines– Additional device-related provisions and regulations• Only use original parts or parts approved by the manufacturer.
• Keep this instruction manual available on site.

Personnel qualifications• Only instructed personnel should be permitted to work with and on the device. The
instructed personnel must have received training on the device.
• Make sure that authorized personnel have read and understood the instruction
manual and all other applicable documents.

2.4 Dangers
The measuring instrument was built according to the state-of-the-art and therecognized safety regulations. Nevertheless, improper use may result in risk to life andlimb on the part of the user or third parties, or damage to the unit or other property
may occur.
Dangers from electric

The device is operated with electrical voltages of up to 24 V. Inside the device therepower

are voltages that are considerably higher. There is a danger to life from the contact ofconductive parts inside the device.
• Disconnect the device from the power supply prior to any installation andmaintenance work. Make sure that the electric power supply cannot reconnectedwithout authorization.
• Before starting the leak test, disconnect electrically operated test objects from thepower supply.
The device contains electric components that can be damaged from high electric
voltage.
• Make sure before connecting to the power supply that the supply voltage is 24 V+/- 16 % (stabilized!).

Hazards due toLiquids and chemical substances can damage the instrument.

liquids and chemicals• Do not suck up liquids with the instrument.

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Safety | 2• Never try to find toxic, caustic, microbiological, explosive, radioactive or otherharmful substances with the device.
• Only operate the device in a dry environment.
• Only use the device away from areas with a risk of explosions.
• No smoking. Do not subject the device to open fire and avoid sparking.

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3 | Scope of delivery, transport, storage

INFICON

3 Scope of delivery, transport, storage
Scope of delivery

12

5
Positio Item

3

4
Catalog number

Quantity

n no.
1

3-pole cable socket

2

Connection line with1
540-0112

chamber connection,
length 0.5 m
3Operating manual

1

4

T-Guard2 or

540-200

T-Guard2 with

540-201

1

PROFIBUS
5

Filter2

Connection cable to the control unit included in the scope of delivery, currently only
optional accessories► Check the delivery contents after receiving the product to ensure it is complete.
Transport

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Scope of delivery, transport, storage | 3

NOTICE
Material damage if incorrect transport packaging is used
Transport over long distances► Keep the original packaging.
► Only transport the device in its original packaging.

Storage

Always store the device in compliance with the technical data, see Technicalspecifications [} 20].

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4 | Description

INFICON

4 Description
4.1 Function
Function and setup of the device
The T-Guard2 can verify and quantify helium using a Wise Technology™ Sensor.
A fore pump, which is an available accessory, provides constant pressure and flow at
the Wise Technology™ Sensor.
During a measurement, outside air is sucked in through the reference inlet. This
allows the natural helium content of the air at the measurement location to bemeasured. This measurement value influences the calculation of the test result.
Wise™ Technology

The Wise Technology™ Sensor consists of a glass housing, which is locked with a

Sensorquartz membrane. The quartz membrane is permeable only for helium.
The pressure in the interior of the glass housing is measured by a highly sensitive
measurement system. The pressure is proportional to the helium concentration of the
supplied air and the air extracted from the measuring chamber.

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Description | 4

4.2 Design of device
Basic unit
The main unit is only called a “device” in the following as long as the meaning remains
clear.

1
2
3
Fig. 1: Front view1“IN” connection, measurement
inlet

2

3

“OUT” connection, pumpconnection“REF” connection, reference inlet

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4 | Description

INFICONInterface plate, top view and base plate

1

2

9

10

3

8

4
7

5

6

11

Fig. 2: Top view and base plate

1

Power supply unit connection

7

RS-232 connection

2

PROFIBUS connection

8

I•Stick connection

3

Control unit connection

9

Thermal circuit breaker(CONTROL UNIT)(resettable)

4

PLC interface (PLC IN/OUT)

10

Rubber feet (4x)5Analog recorder output

11

Ventilation grill with filter(RECORDER)
6

Status LEDs

Thermal circuit breaker (resettable)
The thermal circuit breaker trips in case of wrong polarity or if the current exceeds 7 A
for a longer period of time. After you have eliminated the source of the error, you canswitch on the thermal circuit breaker again by pressing the button.

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Description | 4Interface description
1. Power supply unit connection
The positive pole is marked with “1+” and the negative pole with “2+”. The other 2pins have no function. For more information see Electrical data [} 21].
2. PROFIBUS connection (optional)
This device can be controlled using a PROFIBUS.
3. Control unit connection (CONTROL UNIT)
The control unit, which is an available accessory, is connected here,, seeConnecting an external control unit [} 30].
4. PLC interface (PLC IN/OUT)
The interface enables communication with a PLC. Some functions of the device
can be controlled from the outside and measurement results and device states of
the T-Guard can be transmitted to the outside.
The T-Guard has 6 configurable digital PLC inputs and 8 configurable digital PLC
outputs.
5. Analog recorder output (RECORDER)
The device has 2 separate configurable analog recorder outputs.
6. Status LEDs
The 5 status LEDs provide information on the device various operating modes.
– LEDLights up when the device is switched on.
– LEDs 1–4
Displays the status of the configurable digital outputs 1-4.
– LED 2
LED 2 is red and lights up – unless configured otherwise – in the event of anerror or a warning.
7. RS-232 connection
8. I•Stick connection
9. FuseThe fuse blows in case of wrong polarity or if the current exceeds 7 A for a longer
period of time. After the error has been resolved, the fuse can be switched backon again by pressing the button.

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4 | Description

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Measurement andAlong with the device, you receive 2 identical lines with a length of 0.5 m with a filter.

reference line

One line is used to connect the measurement chamber to the device, the other sucks
in reference air, see Settings for the measurements [} 51].
1
2

3

Fig. 3: Measurement and reference line with filter

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1

Filter2

Threaded connector 1/8˝ M-NPT

3

Device connections

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Description | 4

4.3 Accessories (not included in the shipment)
Control unit connection cable
Use this cable to connect the control unit to the T-Guard2.

Connector mated set
The connector mated set contains Phoenix connectors, with which you can modify thefollowing cables:• PLC• Analog recorder

Measurement and reference line, longLines with lengths of 0.5m, 1.0m and 2.0m are available as accessories.

Filter set
The filter set consists of 2 filters for the lines. The filters must be replaced regularly.

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4 | Description

INFICON

4.3.1 Control unit
You can operate the device via an external control unit. There are two versions of thecontrol unit – one for table-top operation and another for rack installation.

Fig. 4: Control Unit for Desktop Operation

Fig. 5: Control unit for rack installation

4.3.2 Control unit connection cable
Use this cable to connect the control unit to the device.

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Description | 4

4.3.3 Connector mated set
The connector mated set contains Phoenix connectors, with which you can modify thefollowing cables:• PLC• Analog recorder

4.3.4 Fore pump

Fig. 6: Fore pump (example)

The fore pump sucks the air from the measurement chamber and guides it to the TGuard2. The fore pump is double-stage, brushless and operates at a supply voltage of
24 V DC.

4.3.5 Measurement and reference line
Lines with lengths of 0.5m, 1.0m and 2.0m are available as accessories.

4.3.6 I•STICK

Fig. 7: I•STICK

On the I•Stick, you can save parameters and quickly switch between the different TGuard devices, see Save parameters [} 70].

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4 | Description

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4.4 Technical specifications
4.4.1 Mechanical data
Dimensions (B × H × T)

130 mm × 271 mm × 272 mm

Weight5.8 kgLine connections

6 mm quick connectors

Screw thread IN / REF line

1/8˝ M-NPT

Noise level< 56 dB (A)

4.4.2 Ambient conditions
Max. height above sea level2000 mMaximum relative humidity

80% to 31 °C and 50% above 31 °C

Max. storage temperature-20 °C to +60 °C

Permissible ambient temperature (during

5 °C to 50 °C

operation)
Degree of contamination

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Description | 4

4.4.3 Electrical data
Supply voltage

24 V DC ± 16 % / max. 6 A

Power consumption, typical

70 Watt

Protection class

IP 40

Overvoltage category

II

Thermal circuit breaker (resettable)

7 A, inert

4.4.4 Physical data
Max. inlet pressure

1300 mbar

Minimum detectable leak rate helium

1 x10-6 mbar l/s

Maximum leak rate that can be displayed 15 mbar l/s
Measurement range

5 decades

Time constant of the leak rate signal (63<1s% of the final value)Gas flow FINE

180 sccm

Gas flow GROSS

90 sccm

Helium sensor

Wise™ Technology

Max. carrier gas flow

1000000 sccm

Time until ready for operation– 3…30 min, depending on the length of
the rest time
– up to several hours in the event of longstorage

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4 | Description

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4.4.5 Factory settings
Setting

Value

Control unit
Language

EnglishTrigger level 1

2 x 10-5 mbar l/s

Trigger level 2

1 x 10-5 mbar l/s

Leak rate of the test leak1 x 10-5 mbar l/s

Calibration leak rate (calibration leak)1 x 10-5 mbar l/s

He concentration

100%

Standby time

10 min.

Carrier gas flow

1000 sccm

Length of the line

50 cm

Measuring time

Automatic

Waiting time purge

4s

Purge time4s

Volumes, accumulation

1l

Pressure unit

mbarInterfaces
Control location

All

Analog output 1...2

LR exponent

Analog output 3...4

LR Log., 2 V/decadeContamination limit

Low

Pressure limits (monitoring)

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Lower limit

180 mbar

Upper limit

350 mbar

Cal factor

1

Menu PIN

0000

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Installation | 5

5 Installation
5.1 Setup
WARNING
Danger from moisture and electricity
Moisture entering the device can lead to personal injury due to electric shocks as well
as damage to property due to short circuiting.
► Only operate the device in dry environments and only in buildings.
► Operate the device away from sources of liquid and moisture.
► Position the device so that you can always reach the plug for unplugging.
► Do not operate the device in standing water and do not allow even a drop of wateror other liquid on the device.
► Prevent the device from coming into contact with bases, acids and solvents.

CAUTION
Danger due to dropping heavy loads
The device is heavy and can damage persons and items through tilting or dropping.
► Place the device only on a sufficiently sturdy surface.

NOTICE
Property damage due to overheated device
The device heats up during operation and can overheat without sufficient ventilation.
► Observe the permissible operating or ambient temperature.
► Ensure adequate ventilation. There must be 20 cm of free space on the upper sideof the device above the ventilation opening.
► The ventilation opening on the underside of the device must remain unobstructed.
► Keep heat sources away from the device.
► Do not expose the device to direct sunlight.
There must be no vibrations affecting the device. Vibrations can lead to incorrect
measurement results.

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5 | Installation

INFICON8,3 mmmax. 10 mm
3

1

2

Fig. 8: Functionality of the circuit breaker

1

Rubber feet (4x)2Ventilation grill with filter

3

Thermal circuit breaker (resettable)

During installation, make sure that:1

The device is sufficiently ventilated at the top and bottom of the device.

2

That the circuit breaker is functional after installation.

3

That the screw-in depth is max. 10 mm.

On delivery, the device is filled with nitrogen. This prevents the sensor from recording
helium readings. The line connections are equipped with plugs. Remove the plugs
immediately before connecting the lines.
The delivered lines are 0.5 m in length. Lines with a maximum length of 2.0 m can bepurchased as accessories. Longer lines may not be used. The device must therefore
be installed suitably close to the measurement chamber.

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Installation | 5

5.2 Operating modes and measurement setup
NOTICE
Material damage due to loss of oil
Pumps with oil seals can lose oil and damage the unit.
► Arrange pumps with oil seal below the unit or lay the line so that no oil can get tothe unit.
The T-Guard2 can be used to measure in 3 different operating modes:• Accumulation measurement• Carrier gas measurement• Continuous measurement
For accumulation measurement, the leak rate of the test object is formed from thedifference between two helium measurements. The pressurized and helium-filled test
object is placed in the measurement chamber, or it is subjected to pressure in themeasurement chamber. The first measurement is performed immediately afterwards.
If the test object leaks, the helium concentration in the measuring chamber will
increase and the following second measurement will determine this higher
concentration.
For the carrier gas measurement, the test object is also either placed, filled and ready,in the chamber, or is subjected to pressure only after being placed in the chamber. In
any case, the measurement chamber is not airtight. Instead, a clearly defined amountof outside air is blown into the measurement chamber. The airflow comes into contact
with the test object and carries any emerging helium from the test object to the TGuard2. The device measures the helium content in the gas flow for a defined periodof time and determines the leak rate from the measurement result.
The carrier gas measurement allows for larger leaks to be quickly identified. The
carrier gas measurement is, however, sensitive to variations in the helium
background. Since the helium background often varies in a production environment,
accumulation measurement is generally more reliable.
The device measures the helium background and displays the level with a message:<10 ppm Background OK
10…18 ppm Background moderate>18 ppm Background bad

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5 | Installation

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5.2.1 Measurement setup for accumulation measurement
Select the most helium-free environment possible for the measurement setup. For
reliable measurements with the T-Guard2, the helium content in the air must be lessthan 10 ppm. By nature, air contains 5 ppm (0.0005%) helium.

1
2
3
4
5

7

6

Fig. 9: Measurement setup for accumulation measurements

1

Measurement line

5

Buffer volumes

2

Measuring chamber

6

Fore pump

3

Fan

7

Reference line

4

Test object• Measurement line
The measuring line and reference line must be the same length.
• Measuring chamber
The measurement chamber must be leak-proof. The net volume, i.e. themeasurement chamber volume minus the volume of the test object, must be
between 0.01 and 10,000 liters. The measurement chamber should not be bigger
than necessary, but the test object may not touch the walls.
• Fan
The measurement chamber must have a fan that blows air at the test object. The
helium or forming gas escaping from the leak is distributed equally in themeasurement chamber by the fan. It is therefore irrelevant from the point of viewof the measurement result whether the leak is close to the measuring line.
• Test object
The test object should not be placed on the areas that may be leaking.
• Buffer volumes

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Installation | 5

For the best possible reproducible results, the helium background must be stable.
Therefore, do not deliver the outside air directly to the reference inlet - use a buffer
volume instead. The buffer volume must be at least 4 liters.
• Fore pump
All vacuum pumps can be used with a gas flow of more than 200 sccm at a basicpressure of under 50 mbar. INFICON offers a suitable pump as an accessory.
• Reference line
To protect the sensor, helium may not enter the reference line. Therefore, only
outside air or fresh air may be sucked into the reference line.

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5.2.2 Carrier gas measurement setup
Select the most helium-free environment possible for the measurement setup. For
reliable measurements with the T-Guard2, the helium content in the air must be lessthan 10 ppm. By nature, air contains 5 ppm (0.0005%) helium.

1

2

3

4
5
6
7
8
9
Fig. 10: Measurement setup for carrier gas measurements

1

Carrier gas pump

6

Test object

2

Mass flow controller (optional)

7

Outside air inlet

3

Measurement line

8

Reference line

4

Measuring chamber

9Fore pump5

Fan• Carrier gas pump
The carrier gas pump ensures carrier gas flow through the measurement
chamber. The following limits apply:
Expected leak rate

Carrier gas flow

1 × 10-5mbar l/s<3000 sccm

1 × 10-4mbar l/s<30000 sccm

1 × 10-3mbar l/s<300000 sccm

• Mass flow controller (optional)
The mass flow controller controls the actual current mass flow. This allows for thedetermination of a more accurate leak rate than an estimation of the mass flow.
• Measurement line

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Installation | 5

The measuring line and reference line must be the same length.
• Measuring chamber
The net volume, i.e. the measurement chamber volume minus the volume of thetest object, must be between 0.01 and 10,000 liters. The measurement chambershould not be bigger than necessary, but the test object may not touch the walls.
Apart from the outside air inlet, the measurement chamber must be leak-proof.
• Fan
The measurement chamber must have at least one fan that blows air at the test
object. If the test object has a leak, the helium that emerges is distributed equallyaround the test chamber. It is therefore irrelevant from the point of view of themeasurement result whether the leak is close to the measuring line.
• Test object
The test object should not be placed on the areas that may be leaking.
• Outside air inlet
The inlet for the outside air must be opposite the exhaust air connection. Do notmake the outside air inlet too big. Helium may not escape from the measurement
chamber at this point.
• Reference line
For the best possible reproducible results, supply outside air to the reference
inlets. The same air must be sucked in by the reference line as in themeasurement chamber.
• Fore pump
All vacuum pumps with a gas flow of more than 200 sccm at a basic pressure ofunder 50 mbar can be used as a fore pump. INFICON offers a suitable pump as
an accessory.

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5.3 Connecting an external control unit
NOTICE
Material damage due to connection error.
If you insert or remove the plug during operation, the device could be damaged.
► Only insert or remove the cable when the device is disconnected from the power
supply.
The diagram below displays the dimensions of the control unit for rack installation.

Fig. 11: Dimensions of the control unit for rack mounting

The front of the control unit for rack installation corresponds to protection class IP40.
• Place the table device on a stable base or mount the control unit in a rack.
• Connect the external control unit to the “CONTROL UNIT” connection on the TGuard2 using the corresponding cable.
• Secure the plug on the socket by tightening the screws.

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5.4 Connecting to the power supply system
NOTICE
Material damage if power supply pack has the wrong specifications or isconnected improperly
A power supply pack that has the wrong specifications or is connected improperly candestroy the unit.
► Use a suitable power supply unit, see below.
► If the short circuit current of the power supply unit is greater than 10 A, connect afuse between the power supply unit and the device.
► Use power supply cables with a sufficient cross-section, see below.
The following power supply unit types are suitable:• Output voltage with electrically safe separation• Output voltage: 24 V DC ± 16 %• Current rating: min. 6 A. In general, the device consumes 70 W.
Cable length

Minimum diameter/cable type8.5 m

0.75 mm2

10 m

1 mm2 / AWG 18

15 m

AWG 1617.5 m

1.5 mm2

25 m

AWG 14The diagram shows the pin assignment of the connector plug.
Connect the power cable to the device as described below.

Fig. 12: Power supply cable1

Modify a cable to the required size with the supplied cable bushing.

2

Slide the bushing onto the connector plug and secure the connection with thecap nut.

3

Connect the cable to the power supply.

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5.5 Connecting the PLC inputs to the electricalsystemWARNING
Danger due to components subjected to electrical overload
Material damage or personal injury can result from current that is too high at the inputs
and outputs.
► The voltage at the I/O port with regard to the protective conductor cable or the
ground potential must be less than 48 V DC or 25 V AC.
Technical data for the• Input voltage 24 V DC nom., 28 V DC max.

PLC inputs– Low level: 0 … 7 V– High level: 13 … 28 V
Change from LOW to HIGH:
The programmed input function is activated (edge-controlled).
The PLC inputs and PLC outputs are electrically isolated.

Fig. 13: Electrical connection for the PLC inputs and outputs

Factory setting

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PIN

Function

1

START

2

STOP

3

CAL

4

PROOF

5

CLEAR

6

STANDBY

7COMMON (NEGATIVE)

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Installation | 5

Pin 7 is the common negative pole for all inputs and is connected to the negative poleof the voltage source. The allocation of functions for pins 1 to 6 can be changed,

5.6 Connecting the PLC inputs to the electricalsystemWARNING
Danger due to components subjected to electrical overload
Material damage or personal injury can result from current that is too high at the inputs
and outputs.
► The voltage at the I/O port with regard to the protective conductor cable or the
ground potential must be less than 48 V DC or 25 V AC.
Technical data for the
PLC outputs

Nominal output voltage±24 V DC

Maximum output voltage

28 V DC

Maximum sum of the currents for the

0.75 A (protection via an internal fuse)

output pins 8…11
Maximum sum of the currents for the

0.75 A (protection via an internal fuse)

output pins 12…15

Fig. 14: Electrical connection for the PLC inputs and outputs

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Factory setting

INFICONPIN

Function

8

TRIGGER 1

9

ERROR/WARNING

10

READY

11

MEASURE

12

STANDBY

13

REC. STROBE14WARNING

15

CAL ACTIVE

16

COMMONPin 16 is the common pole for all outputs. The pin can be used either as a positive or
negative pole.
The allocation of functions for pins 8 to 15 can be changed,

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5.7 Connecting the analogue outputs to theelectrical system
Technical data for the
analogue outputs

Fig. 15: Pin numbering for the analogue outputs

Analog output 1

Analog output 2

Load resistance

PIN 1

0…10 V

PIN 2

Mass

PIN 3

Mass

PIN 4

0…10 V10 kOhm per output

The allocation of functions can be changed, see Connecting the PLC inputs to theelectrical system [} 32].

5.8 Connecting to a PC
A PC can be connected using an RS-232 interface with a commercially available 9pole sub-D connector. Please refer to the interface description (doc. no. jins85e1) for
further information on data exchange.

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5.9 Connecting measurement, reference andvacuum lines
Use the filters supplied. They protect the lines from blockages and the sensor fromdust.
Measurement and reference lines cannot be shortened. If the length of the line or its
inner diameter is changed, the measurement speed and the measurement results areaffected. Only use the supplied lines, or those available as accessories.
► Push the hoses into the ports until they lock into position.
To release the lines, press the release ring and pull the line.
1

2

3

4

Fig. 16: Vacuum line connection

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1“IN” connection for the measuring line

2“REF” (reference) connection for the reference line

3

“OUT” connection for the vacuum line (pump connection)

4

Release ring

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Operation | 6

6 Operation
6.1 Switching on
The device does not have an on/off switch. It starts up when the power supply isestablished.

6.2 Warm-up phase
The longer the storage time of the device, the longer it will take for the device to reachfull capacity after start-up. For storage periods of weeks to months, this warm-up
phase can take a few hours, and no less than 30 minutes.
If the warm-up phase has not yet completed after 30 minutes, the device is released
with a warning message. INFICON recommends continued operation of the device
with a running fore pump even if not in use.
When the device is ready for operation, it shows the measurement display.

6.3 Display and keys on the control unit
All settings are made with the eight keys to the left and the right of the display. The
function allocations of the keys change depending on the current operating step. The
function allocation is shown directly next to the key which allows fast and purposefuloperation after a short learning period.
Using the “Start” and “Stop” keys, you can start and stop the measurements. Using
the “Menu” key, you can move a level higher in the user interface. If you press the“Menu” key for 2 seconds, the main menu is called up.
The LEDs embedded in the control unit keys and the “ZERO” key do not have afunction.

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6.3.1 Recurring function symbols
The keys are always assigned with the following functions and labeled with the shown
symbols.
Calls the main menu.
Calls a window again that was closed
with.

Calls up information Software version,
operating hours, serial number, date andtime, warning and malfunction messages.
Back to last menu level.

Navigates in a selection list.

Pressing the key assigns the allocation“0” to that key and “1” to an adjacent key.
The same setting option exists for thenumbers “2/3”, “4/5”, “6/7”, and “8/9”.
Closing the window and calling up themeasurement view. Back to the window
withConfirm an entry or selection.

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6.3.2 Measurement display elements
The measured leak rates are shown numerically.
The other elements of the measurement view are shown in the following Figure.

1

9

2

8

7

3

6

4

5

Fig. 17: Measurement display elements

1

Selected set of parameters

6 Trigger value

2

Flashing bell: trigger value 1

7 Information on helium backgroundexceeded
3

Leak rate

8 Bar graph, logarithmic

4

Leak rate unit

9 Warning triangle

5

Operation mode

To 1
Selected set of parameters
The selected set of parameters is displayed in the upper row of the measurement
view. If the set of parameters is subsequently changed, this is illustrated by means ofa small star before the name of the parameter set.
To 7
Information on helium backgroundThe device measures the size of the helium background. The measurement result is
displayed with the “background OK”, “background moderate” and “background bad”
messages.
To 9
Warning triangle
The warning triangle is displayed when there is a message. To call up the message,
select.

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6.4 Basic settings
Before making your first measurement, set the device using the following menu.
• Settings > Miscellaneous• Display• Settings > Interfaces• User authorization
You can access the menus via the main menu
First, set the language.

6.4.1 Setting the language and date
Language

You can select one of the following languages:• English• German• French• Italian• Portuguese• Spanish• Japanese► Select “Settings > Miscellaneous > Language”
To temporarily set the language to English, press keys 2 and 6 during the warm-up
phase. Call up the language setting after the warm-up phase and set the desired
language.

Fig. 18: Numbering sequence of the keys

Date and time

► Select “Settings > Miscellaneous > Time & date”.
First page: Date in the DD.MM.YYYY format
Second page: Time in the HH:MM format

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6.4.2 Selecting a pressure unit
Continuous measurement only: To be able to interpret the measurement result, youneed the pressure that is displayed with it.
You can choose between the following pressure units:• atm• Torr• Psi• Pa• mbar► Select “Settings > Measurement settings > Pressure unit”.

6.4.3 Setting the display
You can set the contrast, the background color and the display limits.
Contrast

You can adjust the display contrast to the light conditions► Select “Display > Contrast”.
If the display is not legible after switching on because it is too dark or too bright, you
can change the setting as follows:
1. After switching on, press the 3 key to make the display darker, or 7 to make itbrighter.
2. Call up the contrast setting after the warm-up phase and set the desired contrast.

Inverting the display

The factory setting with black font on light background can be inverted. This causes
the display to emit less light overall.

Display limit

With the function “Display limit”, you can hide measurement results that are below the
expected leak rate.
You can define the lower display limit as a multiple of the lowest measurable leak rate
(1 ×, 2 ×, 5 ×, 10 ×, 20 ×, 50 ×, 100 ×).
► Select “Display > limit”.

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6.4.4 Calibrate
NOTICE
Incorrect calibration because of unsuitable calibration leakAn unsuitable calibration leak leads to an incorrect calibration and therefore toincorrect measurement results.
► An accurate calibration is achieved with client-specific calibration leaks by
INFICON.
► Ideally, produce a master test object with a built-in calibration leak.
► The calibration leak rate must be greater than half of trigger level 1. Possible leakrates are 5 × 10-6 bis 15 mbar l/s.
The device must be calibrated before the first measurement.
Calibration is only possible after the device has completed the warm-up phase. Before
this point, the relevant menu item is not displayed.
In the following operation, you only need to calibrate again if the measurement setup
or the measurement conditions are changed:• Accumulation measurement:– Change to the accumulation volume– Change to the measurement time for manual measurement time entry– Change to the trigger value• Carrier gas measurement– Change to the carrier gas flow
– Change to the measurement time for manual measurement time entry
The measurement time during the calibration is set automatically. You can change themeasurement time if necessary; a shorter measurement time, however, leads to lower
reproducibility (“Measurement settings > Set times > measurement time”).

Fig. 19: Access to the calibration settings

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6.4.4.1 Accumulation measurement
For the calibration of an accumulation measurement, you must enter the accumulation
volume, i.e. the volume of the measurement chamber minus the volume of thecalibration leak. If you do not know the accumulation volume, you can carry out avolume test - see below.
Volume testü The device must be ready to measure (READY).
1

Place the calibration leak in the measurement chamber and close themeasurement chamber.

2

Select “Settings > Measurement settings > Accumulation volume/Volume test”.

3

A window opens in which you can set the calibration leak rate.

4

Confirm with “OK”.

The device measures and the calculated volume is displayed. You can accept thevalue by pressing “OK”.
Calibration sequence• In the main menu, select “Settings > Measurement settings > Accumulation
volume” and enter the net volume of the measurement chamber (volume of themeasurement chamber minus the volume of the calibration leak).
• In the main menu, select “Trigger > Trigger level 1” and enter the trigger level forthe upcoming measurement run, see Settings for the measurements [} 51].
• In the main menu, select “Calibration > Test leak rate” and enter the leak rate of
the calibration leak.
• Place the calibration leak in the measurement chamber and close themeasurement chamber.
• Select “Start calibration”.
The device measures and the new calibration value is displayed. You can accept the
new calibration factor by pressing “OK”, or cancel it by selecting “Cancel”.
Ideally, the calibration factor is 1. If the calibration factor is less than 0.5 or greaterthan 2, you can accept it but a warning message appears, stating that it is possible toimprove your measurement setup.

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6.4.4.2 Carrier gas measurement
The carrier gas flow can be determined using the carrier gas pump technical data, orby installing a mass flow controller. Alternatively, you can carry out a flow test - see
below.
Flow testü The device must be ready to measure (READY).
1

Place the calibration leak in the measurement chamber and close themeasurement chamber.

2

Wait 30 seconds.

3

In the main menu, select “Settings > Measurement settings > Carrier gas flow >Test flow”.

4

A window opens in which you can set the calibration leak rate.

5

Confirm with “OK”.

The device measures and the new calculated volume is displayed. You can accept thevalue by pressing “OK”.
Calibration sequence• Select “Settings > Measurement settings > Carrier gas flow” and enter the carriergas flow.
• In the main menu, select “Trigger > Trigger level 1” and enter the trigger level forthe upcoming measurement run.
• In the main menu, select “Calibration > Test leak rate” and enter the leak rate of
the calibration leak.
• Place the calibration leak in the measurement chamber and close themeasurement chamber.
• Wait for a defined amount of time, which is calculated as follows:• In the main menu, select “Calibration > Start calibration”.
The device measures and the new calibration value is displayed. You can accept the
new calibration factor by pressing “OK”, or cancel it by selecting “Cancel”.
Ideally, the calibration factor is 1. If the calibration factor is less than 0.5 or greaterthan 2, you can accept it but a warning message appears, stating that it is possible toimprove your measurement setup.

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6.4.4.3 Check the calibration
When checking the calibration, only the calibration factor is checked and is not written
again.
The leak rate of the test leak used for the test may differ from the leak rate of thecalibration leak. Therefore, they must be entered separately. The leak rate must be
greater than half of trigger level 1.
Possible leak rates are 5 × 10-6 bis 15 mbar l/s.
► In the main menu, select “Calibration > leak rate Test leak”.
The test procedure is the same as for a calibration, see above. After the test, thedevice displays whether the calibration was OK or whether it needs to be calibrated
again.
► To start the test, select “Calibration > Start test function” in the main menu.

6.4.5 Selecting the control location
Select from where the device should be controlled.
Control location

Function

Local (control unit)

The device can only be controlled using
the control unit.

RS232

The device can only be controlled using
the RS-232 interface.

PLC

The device can only be controlled using
the PLC inputs.

Local and RS232

The device can be controlled using thecontrol unit and the RS-232 interface.

Local and PLC

The device can be controlled using thecontrol unit and the PLC inputs.

All

The device can be controlled using thecontrol unit, the RS-232 interface and the
PLC inputs.

Furthermore, the following applies:• RS-232 may always read values.
• The PLC outputs are always active.
• Device settings can be changed using the control unit, regardless of the selectionsin the interface. If you want to prevent this, use the user authorization to do so.
• Select “Main menu > Settings > Interfaces > Control location”.
Refer to Chapter Controlling the device using interfaces [} 59] and the interface
description (jins85e1-e).

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6.4.6 Setting up user authorization
Access to calibration

You can prevent access to calibration:► Select “Main menu > Access control > Access to CAL function”.

Protecting settings

You can protect access to the settings with a PIN.
To prevent entry errors, you have to enter the PIN twice. After confirmation with “OK”,
the main menu is displayed and the PIN is effective immediately.
To cancel protection again, enter “0000” as the new PIN (factory setting).

Fig. 20: Defining the menu PIN

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6.5 Operation modes
You can carry out measurements in 3 operating modes:• Accumulation measurement• Carrier gas measurement• Continuous measurement (accumulation or carrier gas)

6.5.1 Accumulation measurement
If a leaking test object that has been filled with helium under pressure is placed in aclosed measurement chamber, the helium concentration in this measurement
chamber increases over time. This is called accumulation (of helium). The difference
between the helium concentrations at 2 time points provides the leak rate.
The air in the measurement chamber must be circulated so that the concentration of
the helium in the entire measurement chamber is set equally.
The following diagram shows the typical helium concentration over time in a closed
measurement chamber with a leaking test object. Because of the helium content in theenvironment, the helium value is never zero. The helium concentration shows linear
growth over time. The device measures the helium concentration in the measurement
chamber 4 times (except for turbo measurement).

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Helium concentration

7

Accumulation time

2

Start

8

Second GROSS measurement

3

Helium in environment

9Second FINE measurement

4

Time

10

Waiting time before purge

5First GROSS measurement

11

Purge time

6

First FINE measurement

12

Measuring time

GROSS measurement During the measurement, the switch between GROSS and FINE measurement takes
and FINE

place automatically. For the GROSS measurement, the sensitivity is limited to protect

measurement

the sensor from helium contamination. The sensor measures with the highest
sensitivity for the FINE measurement.

Measurement cycle

The accumulation measurement begins with a GROSS measurement. If, at the
beginning of the measurement, the helium concentration in the measurement chamber
is already higher than the environment by approx. 1000 ppm, the test object has alarge leak. In such a case, the device stops the measurement. The display shows aleak rate that is a hundred times higher than trigger value 1, or, if used, trigger value 2.
If the test object passes the GROSS measurement, the device switches to FINE
measurement.
The device stops if the helium concentration increases too quickly during the FINE
measurement. The display shows a leak rate that is 5 times higher than trigger value
1, or, if used, trigger value 2.
After the first FINE measurement, a short measurement break follows, in which thetest object can be subjected to higher pressure. Then the second GROSS
measurement takes place. The second GROSS measurement is necessary because alarge leak could have occurred as a result of the additional pressure.
If the test object passes the second GROSS measurement, the device switches to
FINE measurement again. From the difference between the 2 FINE measurement
results, the device calculates the leak rate.

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Turbo measurement

If a trigger value greater than 1 × 10-3 mbar l/s per liter of the net volume is set, thedevice automatically carries out a turbo measurement. The turbo measurement only
takes 6 seconds, consisting of 3 seconds settling time and 3 seconds measurement
time. The device is ready to measure again after 2 further seconds.

6.5.2 Carrier gas measurement
The following diagram shows the typical helium concentration over time in ameasurement chamber with a leaking test object.

1

Helium concentration

4

Time

2

Start

5

Increasing signal

3

Helium in environment

6

Stable signal, final value

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Leak rate display of acarrier gas
measurement

Fig. 21: Leak rate display of a carrier gas measurement with information on the helium
background of the sensor and the surroundings

The time required to achieve a constant signal in carrier gas mode (final value)depends on the gas flow and the volume in the measurement chamber. The larger themeasurement chamber and the smaller the gas flow through it, the longer it takes forthe signal to reach its final value.
The time required to see 63 % of the signal is the volume of the measurement
chamber divided by the gas flow.
For example: For a volume of 2 liters and a gas flow of 20 l/s, 63 % of the signal canbe seen after 0.1 s. Three times this time reveals 95 % of the signal (0.3 s in thisexample). Five times this time reveals 99 % of the signal (0.5 s in this example). Witha larger gas flow, the measurement is quicker but the sensitivity is lower. The smallest
representable leak rate increases with increases to the gas flow.
Dynamic

To save time, you can calibrate and measure with a shorter time than is necessary formeasurement

the leak rate final value. In this case, however, the temporal progression of every
measurement must be identical to the progression of the calibration. This method iscalled dynamic measurement.

GROSS measurement The measurement cycle begins with a GROSS measurement. The FINE
and FINE

measurement follows it automatically. For the GROSS measurement, the sensitivity ismeasurement

limited to protect the sensor from helium contamination. The sensor measures with thehighest sensitivity for the FINE measurement.

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6.5.3 Continuous measurement
For the continuous measurement, expert knowledge from the helium leak test
department is required.
During the continuous measurement, the device provides continuous measurement
results, but as sensor current in amperes rather than as a leak rate. It is therefore notpossible to set a trigger value. The sensor current changes by approx. 1,5 × 10 -7
amperes per mbar of helium at the sensor. It is your task to interpret the current
signal.
Whether a GROSS or a FINE measurement takes place is also set manually: In themeasurement window, select “Select GROSS” or “Select FINE”.

Fig. 22: Display of the reference values during a continuous measurement

The measurement begins when you select “Start”. Selecting “Stop” switches from themeasurement line to the reference line.
If you interrupt the measurement, you should always switch to the reference line using“Stop” or select standby, see Standby [} 56]. This preserves the sensor.

6.6 Settings for the measurements
When you have decided on an operating mode, set the parameters for themeasurement.
Trigger level 1 and 2

Accumulation measurement: If a trigger value greater than 1 × 10-3 mbar l/s per liter ofthe net volume is set, the device automatically carries out a turbo
measurementOperation modes [} 47].
Carrier gas measurement: The set value determines the measurement time anddecides whether a FINE measurement takes place after the GROSS measurement,
see Operation modes [} 47]. The limit is 6.7 × 10-7 mbar l/s per sccm of the carrier gas
flow.
The limit is automatically increased by the device if you are working with diluted
helium and have made the corresponding change to the device settings.
A second trigger level can be helpful for the assessment of the measurement values.
You can activate the trigger level under “Trigger lever 2” and set a value. If you set avery high value here, the display range is also expanded upwards.
► In the main menu, select “Trigger > Trigger level 1” or “… Trigger level 2”.

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Setting range:• Trigger level 1 1.0 × 10-6 to 15 mbar l/s.
• Trigger level 2 2.5 × 10-5 to 15 mbar l/s.
He concentration

To measure with a helium concentration of 100%, you must evacuate the test object
before adding the helium. In all other cases, work is carried out with diluted helium andthe concentration must be set.
The device modifies the measurement time based on the concentration.
► In the main menu, select “Settings > Measurement settings > He concentration”.
Under certain conditions, the measurement time changes and the displayed cycle time
therefore does not change:
Accumulation measurement: If a turbo measurement is triggered as a result of the low
He concentration or if the measurement time has already reached the maximum
length.
Carrier gas measurement: If the measurement is carried out as a GROSS
measurement or if the measurement time has already reached the maximum length.

Length of the line

The measurement line length is important for the measurement time, and you must set
the line length. The setting causes the automatic addition of a lead time before themeasurement.
► In the main menu, select “Settings > Measurement settings > Line length”.

Contamination limit

Where possible, set the contamination limit low to protect the sensor from helium
contamination. The measurement stops when the contamination limit has beenreached.
Contamination limit

Measuring time

Measurement result

low

30 s

40 ppmnormal30 s

75 ppmhigh

30 s

200 ppm► In the main menu, select “Settings > Monitoring > Contamination limit”.

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Pressure limits

Operation | 6

If the value of the lower pressure limit is exceeded, this indicates a blocked filter. If thevalue of the upper pressure limit is exceeded, this indicates a leaking measurement
line or a malfunctioning fore pump.
The device issues a warning if a limit is exceeded.
Limit

Pressure

Lower pressure limit

10 ... 350 mbar

Upper pressure limit

250 ... 800 mbar

Required gap between lower and upper> 100 mbar

limit
► In the main menu, select “Settings > Monitoring > Pressure limits”.
Waiting and purge

You can set a time in which you can open the measurement chamber and remove thetimetest object. The measurement chamber must be completely purged with fresh air. If
the waiting time has expired or the measurement chamber has been purged, thedevice automatically sucks air in and uses it to purge the measurement line and thesensor.
► Select “Settings > Measurement settings > Set times > Wait time purge”.
Setting range: 1 ... 300 sec.
The duration of the purge time can also be set:
► Select “Settings > Measurement settings > Set times > Purge time".
Setting range: 1 ... 50 sec.
The larger the leak, the greater the purge time should be. During the purge time, thedevice checks the helium concentration and issues a warning message if there is still
too much helium in the chamber. INFICON recommends a purge time of > 4 sec.
Automatic purging can also be switched off. Then you have to manually begin thepurge after each measurement.
► Select “Settings > Measurement settings > Set times > Purge time (+ on/off)”.
To purge manually, you must activate the required key beforehand:► Select “Settings > Key functions”.
The corresponding interface command can be found in the interface description(jins85e1-e).
Be aware that you cannot manually purge during a turbo measurement, because thebrevity of the measurement is paramount.

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Measuring time

INFICON

You can overwrite the measurement time automatically selected by the device. A
longer measurement time provides a more accurate result, a shorter measurement
time provides a less accurate result.
The measurement time should not be shorter than half of the time automatically set by
the device.
► In the main menu, select “Settings > Measurement settings > Set times >Measurement time”.
A further menu command resets to the automatically set measurement time:► In the main menu, select “Settings > Measurement settings > Set times > Set
times automatically”.

VolumeEnter the net volume of the measurement chamber (volume of the measurement(accumulationchamber minus the volume of the test object).

measurement only)► In the main menu, select “Settings > Measurement settings > Accumulation
volume”.
The setting range is 0.01… 10000 liter
To determine the volume, you can carry out the device volume test, see Basic settings[} 40]

Carrier gas flow

Enter the carrier gas flow.

(carrier gas► In the main menu, select “Settings > Measurement settings > Carrier gas flow”.

measurement only)

The setting range is 60 sccm… 1,000,000 sccm
To determine the carrier gas flow, you can carry out the device flow test, see Basicsettings [} 40]

Measuring in a

For the highest measurement sensitivity, the measurement must be carried out in anitrogen environment

helium- free environment. This is possible when measuring in a nitrogen-filledchamber.
So that the T-Guard2 does not interpret the complete absence of helium as amalfunction, you need to switch off the corresponding monitoring (minimum currenttest):► In the main menu, select “Settings > Monitoring > Without He (N2)”.

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Operation | 6

6.7 Starting the measurement
Waiting time before

After closing the measurement chamber, wait for a defined amount of time, which isthe start (only forcalculated as follows:

carrier gas
measurement)

Start

The measurement is started with the interface or with the selection of “Start”. During
the measurement, bars display the measurement progress. When the measurement isfinished, the display shows the leak rate or a malfunction message. The measurement
can be interrupted at any time by selecting “Stop”. The leak rate displayed at that pointis a provisional value.

Fig. 23: FINE measurement, progress bars

Fig. 24: Leak rate display of an accumulation measurement with information on the helium
background of the sensor and the surroundings.

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6 | Operation

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6.8 Helium contamination
The sensor is well protected from helium contamination. Every measurement cycle
begins with a GROSS measurement. The sensitivity of the sensor is limited during the
GROSS measurement. The subsequent FINE measurement is stopped immediately
when the following measurement value is reached:• > 5 × trigger value 1, if trigger value 2 is not active• > 5 × trigger value 2, if trigger value 2 is active
In addition, you can set limits for the helium contamination. The device stops themeasurement when they are reached, see Settings for the measurements [} 51]
If the sensor is then contaminated again, direct helium-free nitrogen or outside air tothe reference inlet. This cleans the sensor. The cleaning time depends on the helium
content of the supplied air and the degree of contamination.
Continuous

No trigger value can be set for the continuous measurement. You must therefore stopmeasurement

the measurement yourself as soon as you see that the sensor current is too high. The
device switches automatically to the reference line as a last resort when the sensor
current is greater than 1  10-8 A.

6.9 Standby
In standby, air is sucked through the reference line and the sensor is purged. This
preserves the sensor. Always select standby if no measurement is currently taking
place during a continuous measurement session but you do not want to switch thedevice off.
► Select “Operating mode > Standby” in the main menu.
During an accumulation and a carrier gas measurement, the device automaticallygoes into standby when not in use. The time taken to enter standby can be set.
► In the main menu, select “Settings > Measurement settings > Standby delay”.

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Operation | 6

6.10 Switch off
To switch the device off, disconnect it from the power supply.

NOTICE
Material damage due to helium contamination
Helium remaining in the sensor shortens the service life of the sensor and increases
the warm-up phase.
► Do not switch off the device if the sensor is contaminated with helium. Wait until thedevice is ready to measure again (measurement view is displayed).

6.11 Calling up information on the device and on themeasurement
All important information for operation can be displayed on the info menu.
► Select “Info” in the main menu.
Displaying/changing

You can find all the current measurement settings under “View/change settings”. You

settings

can select a setting using the right arrow key and switch to the corresponding setting
window by selecting “Change”.

Settings overview

Fig. 25: Settings overview

Leave the window by selecting “Cancel”. Changed settings are saved.
Internal data

You can display all of the device’s internal data by selecting “Internal data”. You canswitch between the 8 windows using the lower right and left keys .

Vacuum schematic

The image called up displays the device’s vacuum schematic and its valvearrangement. In addition, sensor pressure, sensor current and an estimated helium
concentration in ppm are displayed.

Interfaces

You can display all information on the interfaces by selecting “Interfaces”. You canselect a setting using the right arrow key and switch to the corresponding setting
window by selecting “Change”.

History &Under “History & Maintenance” you can display the last 12 measurement results,

maintenancewarning, malfunction messages, and calibrations.

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6 | Operation

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Cal factor

You can display all information on the calibration factor by selecting “Cal factor”.

Service

The service menu is password-protected. Settings may only be made by the INFICON
customer service.

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Controlling the device using interfaces | 7

7 Controlling the device using interfaces
7.1 Controlling using PLC
The basic functions of the device can be controlled by a PLC, and the measurement
values can be read. Most PLC functions are activated when the input signal increases.
A high signal when the device is starting up is not sufficient.
Electrical data of the inputs and outputs: Connecting the PLC inputs to the electricalsystem [} 32] Connecting the PLC inputs to the electrical system [} 33].

7.1.1 Allocation of functions for PLC input
Using a graphic, you can change the allocation of functions for the input and then testit.
► In the main menu, select “Settings Interfaces  Select PLC input”.

Fig. 26: User-defined allocation of functions, PLC inputs

Change an allocation as follows:
1. Select a pin with the up and down keys on the left side.
2. Select the desired function with the up and down keys on the right side.
3. Confirm with “OK”. An overview with all selected functions is displayed.
4. Check the allocations and press “OK” again to confirm.

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The current state of all inputs and outputs is displayed. The relays can be switched fortesting:
1. Select “Test PLC output”.
2. Using the arrow keys, navigate to the output you want to test.
3. Select “Switch relay”.
Function

Meaning

START

Starts a measurement cycle. If the device was in standby, the startis delayed by a few seconds.

STOP

Stops a measurement cycle. You will not receive a valid leak rate.

START/STOP

Start and stops a measurement cycle when a switch to/from HIGH
to/from LOW is made.

CAL

Starts a calibration. A successful calibration changes the calibration
factor.

PROOF

Starts the calibration check with the test leak rate.

CLEAR

Deletes errors and warnings. The device restarts after an error.

READY

Wakes the device from standby mode.

STANDBY

Switches the device to standby.

GROSS/FINE

Switches between GROSS and FINE measurement. Only available
for continuous measurement.

PURGE

Purges the measurement lines if the input signal is high. The signal
from the helium sensor is ignored. Only available when “Automatic
purge” is switched off.

INV STARTElectrically inverted start command

INV STOPElectrically inverted stop command

STOP/START

Stops and starts a measurement cycle when a switch to/from HIGH
to/from LOW is made.

INV CAL

Electrically inverted CAL command

INV PROOF

Electrically inverted TEST command

INV CLEAR

Electrically inverted delete command

INV READYElectrically inverted ready command

INV STANDBY Electrically inverted standby command
FINE/GROSS

Switches between FINE and GROSS measurements. Only
available for continuous measurement.

INV PURGE

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Electrically inverted purge command

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Controlling the device using interfaces | 7

7.1.2 Allocation of functions for PLC output
Using a graphic, you can change the allocation of functions for the output and thentest it.
► In the main menu, select “Settings > Interfaces > Define PLC outputs”.

Fig. 27: User-defined allocation of functions, PLC outputs

Change an allocation as follows:
1. Select a pin with the up and down keys on the left side.
2. Select the desired function with the up and down keys on the right side.
3. Confirm with “OK”. An overview with all selected functions is displayed.
4. Check the allocations and press “OK” again to confirm.
The current state of all inputs and outputs is displayed. The relays can be switched fortesting:
1. Select “Test PLC output”.
2. Using the arrow keys, navigate to the output you want to test.
3. Select “Switch relay”.
PLC outputs 8 to 11 are connected to LEDs 1 to 4.
The measured leak rate is measured at the analogue output,
Function

Meaning

OPEN

Low resistance, for test purposes

CLOSE

High resistance, for test purposes

TRIGGER 1

Low resistance means that trigger value 1 has been exceeded.

TRIGGER 2

Low resistance means that trigger value 2 has been exceeded.

READY

Low resistance means that the device is ready for the next
measurement. For a continuous measurement, the T-Guard2
measures the reference line.

CYCLE

Low resistance means that the device is currently carrying out a

ACTIVEmeasurement cycle. For a carrier gas measurement, automatic
purging and the reference measurement are included. For acontinuous measurement, there is no measurement cycle; theoutput is therefore always high resistance.

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STANDBY

Low resistance means that the device is in standby.

ERROR

Low resistance means that an error has occurred.

WARNING

Low resistance means that there is a warning.

ERROR /

Low resistance means that an error has occurred or that there is a

WARN

warning.

CAL ACTIVE

Low resistance means that calibration is in process.

REC. STROBE Low resistance means that the recorder output is invalid for 300 ms
because the analogue outputs are currently being updated.
MEASURE

Low resistance means that the device is currently measuring. The
leak rate of the last measurement is measured if both this output
and the REC STROBE output are high resistance.

GROSS/FINE

Low resistance means that the device is currently carrying out a
GROSS measurement.

GROSS LEAK

Low resistance means that the highest trigger value has been
exceeded by at least a factor of 5.

CONTAMINAT Low resistance means that the sensor has been contaminated withED

too much helium. The sensor must be decontaminated immediately.

BACKGROUN

Low resistance means that the sensor current displays a low-heliumDstate. This is a requirement for a sensitive measurement.

INV TRIGGERHigh resistance means that trigger value 1 has been exceeded.

1
INV TRIGGERHigh resistance means that trigger value 2 has been exceeded.

2
INV READYHigh resistance means that the device is ready for the next
measurement. In continuous measurement mode, the T-Guard2
measures the reference line.

INV CYCLE

High resistance means that the device is currently carrying out a

ACTIVEmeasurement cycle . For a carrier gas measurement, this includes
automatic purging and the reference measurement. For acontinuous measurement, there is no measurement cycle; theoutput is therefore always high resistance.

INV STANDBY High resistance means that the device is in standby.
INV ERRORHigh resistance means that an error has occurred.

INV WARNING High resistance means that there is a warning.
INV ERROR /High resistance means that an error has occurred or that there is a

WARN

warning.

INV CALHigh resistance means that calibration is in process.

ACTIVE62 / 92

INV REC.

High resistance means that the recorder output is invalid for 300 ms

STROBE

because the analogue outputs are currently being updated.

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Controlling the device using interfaces | 7

INV MEASURE High resistance means that the device is currently measuring. The
leak rate of the last measurement is measured if both this output
and the REC STROBE output are high resistance.
FINE/GROSSHigh resistance means that the device is currently carrying out ameasurement cycle .

INV GROSSHigh resistance means that the highest trigger value has been

LEAK

exceeded by at least a factor of 5.

INVHigh resistance means that the sensor has been contaminated with

CONTAMIN.

too much helium.

INV

High resistance means that the sensor current displays a low-

BACKGROUN

helium state. This is a requirement for a sensitive measurement.

D

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7.1.3 Acumulation measurement using PLC► Start the measurement when READY is low resistance.
The MEASURE output is low resistance during the measurement.
After the measurement, the MEASURE output becomes high resistance. If only the
REC STROBE output is high resistance again, you can read out the analogue outputs.
This is the case after approx. 300 ms.
If automatic purging is activated, READY becomes low resistance after purging. Only
then can the next measurement be started.

Fig. 28: Example of a PLC- controlled accumulation measurement

Fig. 29: Example of a PLC- controlled accumulation measurement

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Controlling the device using interfaces | 7

7.1.4 Carrier gas measurement using PLC
ü The MEASURE output is low resistance during the measurement.
► Start the measurement when READY is low resistance.
After the measurement, the MEASURE output becomes high resistance. If only the
REC STROBE output is high resistance again, you can read out the analogue outputs.
This is the case after approx. 300 ms.
The READY output becomes low resistance after the reference measurement. This
lasts as long as the FINE measurement. The next measurement can only be started
after it.

Fig. 30: Example of a PLC- controlled carrier gas measurement

Fig. 31: Example of a PLC- controlled carrier gas calibration

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7.2 Controlling using RS-232
Almost all of the device’s functions can be controlled with a PC using the RS-232
interface. RTS and CTS are supported. Set the protocol used on the device.
• – ASCII• – Binary
The ASCII protocol can be used to communicate with the device using typicalcommands from a terminal program, e.g. Putty, as well as to provide answer texts thatare understandable for humans. This protocol is pre-set in delivery condition.
The binary protocol can be used to communicate with the device using software thatwas written by a programmer. This communication method is very fast. It is the fastest
way to, for example, read out the leak rate.
► In the main menu, select “Settings > Interfaces > RS232 protocol”.
In addition, you can set the device to send the following data via RS-232 after every
measurement:• Date• Time• Parameter set name• Operation mode
• Leak rate
• Trigger 1• Trigger 2 (if activated)• Select “Interfaces > RS232 protocol > Print automatically”.
Further details can be found in the interface description (jins85e1-e).

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Controlling the device using interfaces | 7

7.3 Configuring analog outputs
The device has 2 separate configurable analog recorder outputs, see Connecting theanalogue outputs to the electrical system [} 35]. The outputs have 16-bit resolution
and deliver a result after every measurement. In the continuous measurement setting,the renewal rate is 2 Hz. For a higher renewal rate, use the RS-232 interface.
Allocation ofUsing a graphic, you can change the allocation of functions for the outputs.

functions► In the main menu, select “Settings > Interfaces > analog output”.
To change an allocation:
1. Select the pins with the up and down keys on the left side.
2. Select the desired function with the up and down keys on the right side.
3. Confirm with “OK”.

Fig. 32: Allocation of functions for the analog outputs

Function

Meaning

Pressure

0 ... 10 V corresponds to 0… 1000 mbar
in linear display

LR mantissa

Useful only if the other analog output isassigned “Leak rate exponent”. The
mantissa corresponds to the output
voltage in volts.

LR exponent

Useful only if the other analog output isassigned “Leak rate mantissa”. The
exponent is calculated from the voltage
as follows: Exponent = (voltage [V] × 2) –14.
For example:
A voltage of 4.5 V results in an exponentof (4.5 × 2) – 14 = –5.
A voltage for the mantissa of 3 V is 3.
The leak rate is then: 3 × 10-5 mbar l/s.

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LR Linear

The output voltage is linear andproportional to the measured leak rate.
The increase is set with the “Analog
scale” setting (see below).

LR log.

The output voltage displays the leak rate
logarithmically. The corresponding values
are set with the “Analog scale” setting(see below).

Current lin

The output voltage displays the current
linearly. The upper limit value is set withthe “Analog scale” setting (see below).

Current log.

The output voltage displays the current
logarithmically. The corresponding values
are set with the “Analog scale” setting(see below).

Scaling

You can set the scaling of the analog output.
► In the main menu, select “Settings > Interfaces > Analog output scaling”.
Set the final value and the increase (volt/decade) for outputs 1.. 2 and 3 ... 4
separately.
The upper limit applies for the “LR linear”, “LR log.”, “Current lin” and “Current log.”
settings.
The increase (volt/decade) applies for the “LR log.”, and “Current log.” settings.

Fig. 33: Configuration of the analog output scale

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Controlling the device using interfaces | 7• In the “LR log” setting, the leak rate is calculated by:leak rate = final value × 10 (U - 10) / volt / decade)For example:
A voltage of 3.7 V provides a leak rate of 7.08 × 10-5 mbar l/s for a final value of 10-1
mbar l/s and 2 V per decade.
For “Current log.”, the same applies for current instead of leak rate.
• In the “LR log” setting, the leak rate is calculated by:

For example:
10 V correspond to the final value, e.g. 10-3 mbar l/s, 3.7 V then correspond to e. g. 3.7
× 10-4 mbar l/s.
For “Current lin.”, the same applies for current instead of leak rate.

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8 | Save parameters

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8 Save parameters
You can save and call up 4 measurement settings as parameter set in the device. If
you use the I•Stick, this number increases to 25.
The I•Stick is removable storage developed for the device. You can also use it toeasily transfer data to another device.
A parameter set contains all parameters, except for the settings for language and theRS-232 protocol. The designation of a set of parameters can be modified. The
designation of the current set of parameters is in the upper row of the measurement
window. If the set of parameters is subsequently changed, this is illustrated by meansof a star in front of the designation.
In the “Copy parameters” window, all available storage space is listed to the left andright. On the left, the parameter set “Default” also appears, which contains the factory
settings.
The currently set parameter set is always the second one in the left column.
Therefore, “Current data” appears above the left column when you select this storage
space.
On the left, you select the parameter set you want to save and on the right thedestination.

Fig. 34: Copying parameters

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Inserting the I•Stick

Save parameters | 8

On start-up, the device checks whether an I•Stick is inserted.
► With the device switched off, insert the I•Stick into the I•Stick slot.
The I•Stick is initialized on first use. Switch the device off and back on again in order
to use the I•Stick.

Removing the I•StickNOTICE
Loss of data due to disconnection
If the I•Stick is removed during operation, errors will occur during the next reading or
writing operation.
► Only remove the I•Stick when the device is switched off.
Saving a new set of

1. In the main menu, select “Settings > Copy parameters”.

parameters

2. Select the “Default 0” entry on the left.
3. On the right, select the storage location.
4. Select “Copy” to save under the same name, or “Change name” to save theparameters set under a different name.
Before copying, the changed data is displayed for confirmation.
If the parameter set was successfully changed, the “Settings displayed” window isdisplayed again. Otherwise a malfunction message is displayed.

Calling up a saved

1. In the main menu, select “Settings > Copy parameters”.

parameter set

2. On the left, select the parameter set that you want to call up.
3. On the right, select the first entry.
If you only want to transfer the parameter set but not use it yet, select the second,
third or fourth entry.
4. Select “Copy” to save under the same name, or “Change name” to save theparameters set under a different name.
Before copying, the changed data is displayed for confirmation.
If the parameter set was successfully changed, the “Settings displayed” window isdisplayed again. Otherwise a malfunction message is displayed.

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9 | F.A.Q. - Frequently Asked Questions

INFICON

9 F.A.Q. - Frequently Asked Questions• Why are the measurements not reproducible?
– Measurements are less reproducible when the device reports: “Backgroundmoderate” or “Background bad”. Remedy: Reduce the background bychecking the helium supply for leaks. If possible, locate the helium supply far
away from the device. Evacuate the test object after the measurement todispose of the helium. Deliver outside air to the measurement room. The
carrier gas mode only functions when there is a stable 5 ppm of helium in theair.
– Measurements are less reproducible when the measurement chamber isleaking. Since the chamber does not exhibit any difference in pressure to thesurroundings, the seal only needs to fulfill basic requirements and does not
require the complex design required for vacuum technology. A calibration
factor of 0.7 to 1.3 indicates that the chamber volume was entered correctly
during the accumulation measurement. If the calibration factor deviates bymore than 1, either the chamber volume, the He concentration, the trigger
level or the leak rate of the calibration leak was entered incorrectly.
– Measurements are less reproducible when the trigger level is much greaterthan the measured leak rate. The trigger level should be the same as the leakrate to be measured.
– Measurements are less reproducible when the measurement time is reduced
too much. This has the same effect as a trigger level that is too big.
– Measurements are less reproducible when the chamber fan is too weak. The
fan should circulate the chamber volume twice per second.
– Measurements are less reproducible when the device is carrying out a grossmeasurement (carrier gas flow measurement). From a trigger level of 6.7 ×
10-7 mbar l/s per sccm of the carrier gas flow, the device only carries out agross measurement. The message “gross only” appears in the display when
the trigger value is changed. Remedy: Avoid a gross-only measurement byusing diluted helium and the appropriate setting or by using a larger
measurement chamber.
– Measurements are less reproducible if you do not use INFICON measurement
hoses. Hoses with an inner diameter greater than 1 mm may not be used,since the air in the hose cannot be replaced quickly enough.
– Measurements are less reproducible when the vacuum lines are notcompletely inserted into the couplings. Press the vacuum lines deeply enoughinto the coupling.
• Why is the measured leak rate always smaller if I don’t purge the measurement
chamber between measurements?

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F.A.Q. - Frequently Asked Questions | 9– Check the measurement chamber for leaks. Helium can get lost. Over time,
this results in smaller leak rates. Remedy: Seal the measurement chamber.
Use rubber seals for the chamber lid.
• Why can the device not be calibrated?
– Enter the correct chamber volume and set the trigger level and the calibration
leak rate to the leak rate used. If diluted helium is being used, enter this into
the device.
– Check all answers to the first question: Why are the measurements not
reproducible?
• Why do I get a warning after confirming the new calibration factor?
– Your measurement setup can and should be improved. Remedy: Check thechamber volume, the calibration leak rate, the trigger level, the Heconcentration, the measurement time and the fan, and check themeasurement chamber for leaks.
• Why does the measured leak rate become bigger over time?
– The longer the storage time of the device, the longer it will take for the device
to reach full capacity after start-up. With storage periods of weeks to months,
this run-in phase can take a few hours, however no less than 30 minutes.
– You are using a calibration leak that takes time to stabilize. Remedy: Use an
INFICON leak.
– In your test object, the mixing of helium and air takes too long. Remedy:
Evacuate your test object to the greatest extent possible before filling it withhelium.
– The fans in the chamber are dimensioned too weakly.
• Why does the follow-up measurement deliver a leak rate that is too small after agross leak?
– In particular after a measured gross leak, you should flush the measurement
line with low-helium air for at least 4 s and then wait 1 s before the next
measurement. This removes the remaining helium from the measurement
system, which otherwise could affect the follow-up measurement.

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10 | Warning and error messages

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10 Warning and error messages
During operation, the display shows information that helps you operate the instrument.
Measurement values are displayed along with current device modes, operating
instructions as well as warnings and error messages.
The device is equipped with extensive self-diagnostic functions. If the electronicsystem detects a faulty state, the device will show this insofar as possible on thedisplay and will interrupt operation, if necessary.
Error messages

Errors are events that the device cannot correct itself and that force interruption of its
operation. The error message consists of a number and a descriptive text.
After you have removed the cause of the error, start operation again with the restartkey.

Warnings

Warnings warn of device states that can impair the accuracy of measurements.
Operation of the instrument is not interrupted.
A warning triangle is displayed in the measurement view when there is a warning. To
call up the message, select. Use the OK key to acknowledge the warning.

The following table displays all the warnings and error messages. It lists possible
causes for the malfunction and instructions on how to eliminate these.

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Warning and error messages | 10

No.

Message

E1

24 V at the MC50 is Fuse F1 on the DC/DC

Contact INFICON customer

too low

circuit board is blown

service.

Power supply unit too

Use a regulated power

weaksupply unit.

24 V of the sensor

Fuse F2 on the DC/DC

Contact INFICON customer

heating unit is too

circuit board is blown

service.

lowPower supply unit too

Use a regulated power

weaksupply unit.

Fuse F3 on the DC/DC

Contact INFICON customer

circuit board is blown

service.

Power supply unit too

Use a regulated power

weaksupply unit.

24 V at OPTION

Fuse F4 on the DC/DC

Contact INFICON customer

output is too low

circuit board is blown

service.

Power supply unit too

Use a regulated power

weaksupply unit.

-15 V at the MC50

DC/DC circuit board isContact INFICON customer

is too low

defective

service.

E2

E3

W4

E7

E8

E9

W11

24 V II is too low

Possible cause

Troubleshooting

15 V at the MC50 is DC/DC circuit board isContact INFICON customer

too low

defective

service.

High voltage is

Problem in the sensor

Contact INFICON customer

faultyelectronics

service.

WISE current not

The device was not

Let T-Guard2 run for 2 hours.

stableused for several days;
the sensor current
should stabilize after along run time.
The helium background Lower the helium backgroundis higher than 20 ppm. in the room.

E12

Wise sensor not

The Wise Technology

Restart the T-Guard. If theignitedsensor current is too

problem still exists, contact

low 10 min after

the INFICON customer

switching onservice.

(<5 × 10-11 A).
E13

Error with heating

The heating control for

Restart the device.If theregulation

the Wise Technology

problem still exists, contact

sensor is defective.

the INFICON customer
service.

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10 | Warning and error messages

E14

INFICON

Discharge expired

Problem with sensitivity Restart the device but withat the Wise Technology the inlet openings connected
sensorto outside air.

No helium in the

If the problem persists,surroundings (e.g. inlet

contact the INFICON

openings purged withcustomer service.

nitrogen)
E20

Temperature at the

Ambient temperature

Cool the surroundings, placeelectronics unit too

too highthe device in a cooler room.

high (>60°)

Fan failed

Check the fan (check the flowrate through the inlet in the
housing)

W27

W28

E 38

Incorrect

The trigger setting ismeasurement

smaller than 5 x thesettings

minimum display

Correct the trigger value(s)Real-time clock was CPU card was replaced Enter date and time
reset! Enter dateCPU card battery is

Contact INFICON customer

and time

faultyservice.

Pump is faulty

Sensor pressure is

Check the fore pump and thehigher than 800 mbar.

lines to the device.

Fore pump defective,
not switched on orpump hose is broken.
W41

Pressure difference Pressure difference
is too great

Check the inlet filter.

between themeasurement inlet andair inlet should be ±10%
Pressure difference
between READY and
FINE

W43

Pressure too low

Pressure below lower

Check the upper pressure

limit

limit

Reference line is

Check the reference line

blockedW44

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Pressure too highPressure above upper

Check the upper pressure

limit

limit

Bad fore pump

Check the fore pump and the

Pump hose is broken

pump hose

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Warning and error messages | 10

W45

He concentration

At the time of the purge Purge the measurement

too high

procedure, there is toochamber with outside air ormuch helium before or

nitrogen and initiate anotherin the measurement

sensor purge procedureline.

using the PLC input or the

The device interrupts

RS232 command.

the purge procedure

Purge the measurement

prematurely to protectchamber more intensively

the sensor.

before the measurement.

The measurement
chamber was not
sufficiently purged
before themeasurement.
W50

W52

No I•Stick available

I•Stick was not

Switch the device off andconnected at start-up

back on again, this time withI•Stick is defective

the I•Stick inserted

I•Stick parameter

I•Stick removed during

Check your settings

lost!

operation

Switch the device off andCheck the settings!

I•Stick is defective

back on again, this time with
the I•Stick inserted

W59

Overflow of

May occur if a software

Restart the device.If the

EEPROM

update to an older

problem still exists, contact

parameter queue!

version is carried out

the INFICON customer
service.

W60

All EEPROM

New EEPROM was

All settings in the softwareparameters lost!

installed, EEPROM on

menu are reset to factory

Check yourthe system board is notsettings. Modify your settingssettings!

programmed.

again.

If the message occurs

Contact INFICON customer

constantly during start-

service.

up, the EEPROM on thesystem board isdefective.
W61

EEPROM

Software update carried Confirmation required

parameterout and new

initializing!

parameters introduced
Warning, newly
introduced parameterslisted below.

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10 | Warning and error messages

INFICON

If the message occurs

Contact INFICON customer

constantly during start-

service.

up, the EEPROM on thesystem board isdefective.
W62

EEPROM

A parameter was

Check the setting of theparameters lost!

changed and reset tomodified parameter in thefactory setting duringcorresponding software

the software update.

menu and set the desired

The parametersparameter.

affected are listed in thewarning below.
If the message occurs

Contact INFICON customer

constantly during start-

service.

up, the EEPROM on thesystem board isdefective.
W64

There are warnings Confirmed but not yet
pending!

Check the warnings twice!

valid warnings arerepeated every twohours or at every new
start-up.

W65

Communication

Switch the device off anderror with fieldbus

back on. If the problem

modulepersists, contact the
INFICON customer service.

W72

No communication

Switch the device off andwith analog cardback on. If the problem
persists, contact the
INFICON customer service.

W81

Calibration factor

If the calibration factor

too low!

was set to less than 0.2,
the calibration was not
successful. If acalibration factor
between 0.2 and 0.5
was confirmed, awarning still occurs after
confirming thissuccessful calibration.
The calibration leak rate Check the correct setting foris larger than entered.

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the calibration leak value!

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Warning and error messages | 10

W82

Calibration factor

If the calibration factor

Check the chamber volume

too high!

was set to more than 5, settings and/or gas flow
the calibration was not
successful. If acalibration factor
between 2 and 5 was
confirmed, a warning
still occurs after
confirming thissuccessful calibration.
The calibration leak rate Check the correct setting foris smaller than entered. the calibration leak value!
Chamber volume and/or Check the chamber volume
gas flow are greater

settings and/or gas flow

than entered.
W84

Calibration leakCalibration leaksignal too small

defective
Trigger value(s) too

Check your calibration leak

Check the trigger

high

W89

Volume/flow setting too

Check the accumulation

low

volume/the carrier gas flow

Measurement chamber

Check the measurementleaking

chamber for leaks

Overstep of the limit The device is

Do not switch off the device.

value!

contaminated with

Leave the device runninghelium.

while supplying fresh air tothe measurement andreference lines until thewarning goes out.
If the warning occurs
frequently, increase thecontamination limit!

Calibration leak value

Use a smaller calibration leak

too high during

for the calibration!

calibration

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11 | Maintenance

INFICON

11 Maintenance11.1 Replacing the inlet filter
There is a filter in both the measurement and reference lines.
Check the filter for dirt every 6 months and replace it if necessary.
Replace filter at the latest after 2 years.
Always replace both filters.
1

Unscrew the old filters from the lines (Luer-Lock connection).

2

Screw the new filters into the lines.

Fig. 35: Filter installed

Fig. 36: Disassembled filter

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Maintenance | 1111.2 Replacing filter mat on bottom of device
Filter set

Order number 200010027

Required tools

Crosshead screwdriver

In production rooms with increased dust load, the filter mat on the bottom of the unit
can become contaminated.
► Replace the filter mats if there is significant contamination.
The filter mats are changed every year as part of the service.

Device bottom side

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11 | Maintenance

INFICON

Filter mat change

1

2

3

1

Panhead screw M4x8 mm

3Filter Grid2

Filter attachment

4

Filter mats (2x)4ü You have a new filter mat.
1

Make sure that the device is disconnected from the power supply bydisconnecting the power supply plug.

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2

Place the unit on its side to access the air filter on the bottom of the unit.

3

Loosen the panhead screw.

4

Remove the filter attachment together with the filter grille and filter mats.

5

Remove the used air filters.

6

Replace the new filter mats, the filter grille and the filter attachment.

7

Tighten the pan-head screw.

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INFICON

Decommissioning | 12

12 Decommissioning
12.1 Disposal
The device can either be disposed of by the operator or be sent to the manufacturer.
The device consists of materials that can be recycled. This option should be exercised
to prevent waste and also to protect the environment.
During disposal, observe the environmental and safety regulations of your country.
T-Guard2 must not be disposed of in household waste.

12.2 Sending in the device
WARNING
Danger due to harmful substances
Contaminated devices could endanger the health. The contamination declaration
serves to protect all persons who come into contact with the device.
► Fill in the declaration of contamination completely.
1

Please do not hesitate to contact us and send a completed declaration ofcontamination before sending anything to us.
ð You will then receive a return number from us.

2

Use the original packaging when returning.

3

Before sending the device, attach a copy of the completed contamination
declaration. See below.

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12 | Decommissioning

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INFICON

T-Guard2_Operating-instructions EN-jina85en1-14-(2211)

INFICON

Declaration of Contamination | 13

13 Declaration of Contamination

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14 | Declaration of Conformity

INFICON

14 Declaration of Conformity

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T-Guard2_Operating-instructions EN-jina85en1-14-(2211)

INFICON

China RoHS | 15

15 China RoHS

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16 | Accessories

INFICON

16 Accessories
Accessory part

Order no.

Control unit for table-top operation

551-100

Operator panel for 19” rack551-101

Connecting cable for control unit, 5 m

551-102

Connecting cable for control unit, 1 m

551-103

Connector mated set

551-110I•STICK

200 001 997

Filter set

200 001 680

E/A testbox for testing the PLC in/outputs 200 002 490
Power supply connection

200 002 496

Measurement chamber connection

200 002 615

Fore pump, 24 V, two-stage, brushless

200 002 929

Lines

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2 × 0.5 m

540-011

2 × 1.0m

540-0122 × 2.0m

540-013

Calibration leakOn request

T-Guard2_Operating-instructions EN-jina85en1-14-(2211)

INFICON

Index

Index
C
Calibration

42

Calibration leak42

Configuring analog outputs

67

Controlling using PLC

59

D
Declaration of Contamination

83

Dynamic measurement

50

E
Error messages

74

G
GROSS measurement and FINE measurement
48, 50I
I•STICK70

O
Operation modes

47

R
Return83

S
Setting the display

41

Standby

56

W
Waiting and purge time

53

Warnings

74

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IndexINFICON

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