INSTRUCTION

MANUALCAPACITANCE TYPE LEVEL SENSORSMODEL： TSD

Meanings of indications for safety used in this Instruction Manual are as follows.
WARNING: Indicates that improper handling assumes the risk of a fatal or serious injury.
CAUTION: Indicates that improper handling assumes the risk of injury or damage to property
only.

TOWA SEIDEN INDUSTRIAL CO., LTD.
HEAD OFFICE

Phone: 81-6-6340-5522, Fax: 81-6-6340-5519

OSAKA PLANT

Phone: 81-6-6340-2831, Fax: 81-6-6349-6551

URL http://www.towa-seiden.co.jp№ETSD1000-1
2019.8.30

Introduction
1.

This instruction manual explains how to use and adjust the product properly. Please be
sure to read this manual before using the product. Keep this manual in a convenient
location for easy reference as required.

2.

This instruction manual describes the standard specifications. If the product you
purchased is based on special specifications, the details may differ from the product.

3.

The instructions in this manual are subject to change without prior notice.

4.

If you have any questions or notice any errors in this manual, please contact our sales
representatives.

5.

We may modify the product to improve product quality. In the event of such modifications,
we may sometimes offer alternative parts rather than original parts or an alternate productto our customers. For more details, please contact our sales representatives.
Safety indications used in this instruction manual have the following meanings.
Warning: This means that improper handling of the product may lead to death orserious injury.
Caution: This means that improper handling of the product may result in personal
injury or damage to property or equipment.

Table of Contents
Introduction································································································· 1

1. Precautions on Handling the Product2. Product Outlines································································· 2························································································· 2

3. General Specifications
4. Outline Drawings················································································· 3·························································································· 3

5. Type Description Table··················································································· 4

6. Precautions on Mounting················································································ 5

7. Wiring······································································································ 8

8. Panel Description···················································································· 10

9. Adjusting Sensitivity···················································································· 11

10. Initial Setting Procedure
11. Setting Delay Timer
12. Troubleshooting
13. Maintenance················································································ 12····················································································· 14························································································ 15···························································································· 16

11. Precautions on Handling the ProductWarning This product has no explosion-proof structure. Do not use the product in aplace where flammable or explosive gas is generated.
1) Check the identification plate after unpacking to confirm that the product is what youordered. In the event the product is not what you ordered, please contact us.
2)

Check the product for any damage. In the event of any damage, please contact us.
Damage may be due to an accident during transportation.

3)

Do not apply excessive force the product. Impacts from dropping or tipping the productmay cause damage.

4)

Do not place any object on the product. Doing so may create excessive force on the
product leading to damage.

5)

When applying paint to the product, if paint is applied on the identification plate,
information on the plate will be covered by the paint, hindering maintenance.

6)

Do not use or store the product in a corrosive atmosphere (such as NH3, SO2, and Cl2).
Corrosive gas may penetrate the product, causing corrosion or damage to internal parts.

7)

Avoid using or storing the product in a place where large vibration exists. In the event of
exposure, remove the source of the vibration or prevent the vibration from beingtransmitted to the product.

2. Product Outlines
2.1 Product objectives
This product is a sensor for measuring liquids, powder, grains, and slurry in a tank orhopper at the level where the detector is mounted by means of the static capacitance(C) of the measuring instrument.
2.2 Operation Principle
A static-capacitance type level sensor is composed of electrodes (a ground electrodeand detection electrode) and electronic circuits, with the electrodes constituting acapacitor. With the ground electrode contacting a tank, a capacitor including the tankis formed. Conditions such as shape, dimensions, layout, and peripheral situations
determine the capacitance of the capacitor. If conditions other than the specificpermittivity (*1) of the measured objects are the same, the capacitance of thecapacitor depends on the specific permittivity of the measured objects. If we take thecapacitance for air as a reference, we can distinguish the difference in capacitancecreated by measured objects with different values of specific permittivity. In addition,
by taking either one of the two measured objects with different specific permittivity as areference, we can distinguish the two objects. This product detects the static
capacitance of measured objects and outputs signals.
*1

Specific permittivity is the ratio of the static capacitance of a capacitor where an insulating substance(dielectric) fills the space between its electrodes to the capacitance of the capacitor where a vacuum
exists between its electrodes with the dielectric removed. Specific permittivity is a constant depending on
the types of materials.

2

3.

Specifications
Power supply voltage

24V DC ±10%Power consumption

1.5 W

OutputRelay output (1C contact)

250V AC 3A (Resistance load)
30V DC 3A (Resistance load)

Sensitivity

High sensitivity

0.5 to 10 pF

General sensitivity

2 to 20 pF

Low sensitivity

5 to 100 pF

Very low sensitivity

20 pF or more(Sensitivity is changed with a DIP switch at initial setting)4.

Operation display

Red LED

Timer function
Operating ambient
temperature
Protecting structure

On-delay

Housing:IP – 65 equivalent

Material of case

Aluminum die cast ADC12Timer time 0 to approx. 10 seconds (variable)-10 to +60 C

Outline drawing

Standard outline dimensions
Individual dimensional outline drawings are provided separately.
Please contact our sales representatives.

3

5. Type Description Table

TS□－□□□－□□□*L dimension column is blank for flat types

L dimension
025

L - 250mm

200

L - 2000mm

A00

L

10m

Amplifier specifications
A

All-in-one

AC 100/200 V -10% – +20%

standard amplifierDAll-in-one

DC 24 V±10%

standard amplifier
F

OthersTemperature inside the tank

A

80°C max.

B

150°C max.

C

200°C max.

D

Special heat-resistance
Mounting

１

Threaded mounting

R 1”

２

Threaded mounting

R 3/4”

３

Slide screw type mounting

R 1”

４

Standard flange mounting

5K65A aluminum

５

Ferrule mounting

2S

６

Threaded mounting with other sizes

７

All slide type mounting with other sizes (including theflange type)８

Flange mounting with other sizes and materials

９

Ferrule mounting with other sizes
Electrode

ＳＡ Standard rod-type electrode
ＷＡ Standard wire electrodewire diameter φ5 mm

ＷＢ Standard wire electrodewire diameter φ8 mm

ＸＡ Standard flat electrode
ＦＡ Rod-type electrode

Teflon coated

ＳＺ Special rod-type electrode
ＧＡ Load-bearing rod-type electrodeＷＺ Special wire electrodeＸＺ Special flat electrodeＦＺ Special coated electrode
ＧＺ Special load-bearing rod-type electrode4

6. Precautions on Mounting
6.1 Checking detector mounting
1)

In mounting the detector, secure space for mounting and an area for maintenancearound the periphery of the tank to maintain workability. The space must be secured
after mounting the detector, taking subsequent maintenance into consideration.
(Space corresponding to at least the total length of the product is required.)2)

When mounting the detector using a short pipe, be sure to have the ground electrodeprotrude from the inner wall of the tank by 10 mm or more.

3)

When using detectors placed side by side, mount the detectors apart at a distance of
250 mm or more.

4)

Mount the detection electrode at a distance of 100 mm or more from the tank wall.

5)

Mount a wire-type electrode at a position where the electrode does not touch the innerwall or a stay of the tank due to swinging of the wire or electrode upon input or outputof the measured object.

Caution: Failure to meet these conditions may result in abnormal use due to adhesion of
the measured object to the electrode, deterioration of sensitivity, and inability tomake adjustments.
6)

When mounting the product onto a tank, be sure to establish electrical conductivity
between the ground electrode (flange and mounting screw portion) and the tank. In thecase of a non-metallic tank, establish a grounding wire to ground the ground electrode(Class D grounding work, 100 Ω or less). In establishing a grounding wire, use the5amplifier panel plate, which is electrically conductive to the ground electrode or one of
the screws that secure the terminal block.
7)

Avoid mounting the product near the motor, pump, or inverter that generates noise or
an ultrasonic cleaner or a transceiver that generates high-frequency electrical fields.
Failure to do so may cause the product to malfunction.

8)

In detection of powder and grains, pay
attention to the angle of repose. Do notmount the detector in a position where
powder does not move around the detector
due to the angle of repose. Doing so may
cause the product to malfunction.

9)

Pay attention to dead stock. Do not mountthe detector in a place where powder
remains creating dead stock. Doing so may
cause the product to malfunction.

10) In detecting powder or grains, mount thedetector in a place where no bridge iscreated. Creation of a bridge may cause thedetector to malfunction and damage thesensor when the bridge collapses.
11) Do not mount the detector in a place wherea lump may hit the detector directly. Failure
not to do so may cause the product tomalfunction and damage the detection unitof the sensor. Protect the detection unit witha guard plate, as required. In establishing aguard plate, place it at a distance of 100 mm
or more from the detection electrode.
12) Do not mount the product in a place where it is exposed to vibration or impact.
Mounting the product close to a vibrator or an air knocker may damage or cause theproduct to malfunction .
13) When mounting the product in a place where the temperature may rise, be sure toobserve the allowable temperature range for the electrode (inside the tank) and theallowable temperature range for the instrument (60°C). Failure to do so may cause theproduct to malfunction.
14) Do not mount the product in a place where it is exposed to direct sunlight. When thetemperature exceeds the allowable range for the instrument, it may cause a
malfunction. Provide a protective cover as required.
15) Take the precautions described below when using the product in a place where thehousing may be exposed to water drops (such as rain water). The housing of the
product is provided with jet water protection (IP65 equivalent) for water intrusion.
However, inadequate tightening of the cover or improper handling of the conductor
outlet may allow water to enter, causing a malfunction or damage to the product. Be

6sure to handle each portion properly.
16) When mounting the detector in a horizontal position, be sure that the conductor outlet
is oriented downward.
6.2 How to mount the productCaution Do not try to screw in or take out the detector by holding the chassis. The
housing may come apart causing damage.
1)

In the case of a threaded mounting, secure the product by applying force to its
hexagonal portion with the appropriate tool. Provide sealing processing, as required,when pressure is generated inside the tank. Do not try to screw in or take out the
product by holding the chassis. The housing may come apart causing damage.

2)

In the case of a flange mounting, check that nominal designations for the companion
flange at the tank match those for the flange of the product. If the check result is inorder, put the gasket in-between and secure the product with a bolt conforming to thestandards using the appropriate tool. Bolts and gaskets are not attached to the product.
Please contact our sales representatives as required.

6.3 Product mounting orientation
1)

In the case of a horizontal (transverse) mounting, the electrode is parallel to themeasured object, providing a larger electrode area to for detection. This generates agreater change in capacitance even with a small change in the measured object,providing high-accuracy detection. However, if the measured object is an adherent, thestability of detection may deteriorate. Mounting electrodes downward will reduce
accumulation and adhesion of the measured object.

2)

In the case of a vertical (longitudinal) mounting, adhesion of the measured object to theelectrode is less likely, providing stable operation. However, the part of electrode thatis effective for detecting the measured object becomes smaller, resulting in reduced
accuracy. For detection of the lower limit of a tank, the lengthened electrode is a
disadvantage.
For conductive material, when both the detection and the ground electrodes contact
the measuring object, malfunctions may occur due to resistance compensation
function, considering that detection is executed only by the detection electrode. To
cope with this problem, first try to adjust the sensitivity. If this does not solve theproblem, coat the electrode with insulating material.

77 Wiring
7.1 Precautions on wiring
Warning When implementing wiring, be sure that the supply power sources andpower sources applied to the output are shut off. Failure to do so may resultin danger of electric shock, electric leaks, and short circuits or combustion.

Warning Do not connect 100V/200V. This may lead to breakage or personal
accident.

Warning Please do the wiring of 0-24V correctly.

Caution Do not connect a load that exceeds the ratings for the relay contacts. Thismay cause damage or deterioration of the relay contacts. In the case whereload capacity exceeds the ratings for contacts, install a relay that meets theload capacity between the load and the output terminal of the product. Do
not connect the relay output terminal with only the power source involved.
Do not connect the power supply directly to the relay output terminal without
connecting a load. Doing so may cause a short circuit or damage theproduct.

8

7.2 Wiring procedure
1) Remove the cover to make sure the connections to each terminal are correct before
starting the wiring. The terminals use M3 screws. Be sure to use a screwdrivercompatible with the screws. For crimp terminals, use one with the size equivalent to
R2 – 3. Cable with an outer diameter of φ6 – 12 mm is recommended.
2)

For the cable, use a cable gland or wire tube compatible with the size of the conductor
outlet (G1/2”) for the cable to run through.

3)

Do the wirings of 0-24V properly with attention to polar.

4)No-voltage contact output is provided by a relay. With terminal c shared, terminals c anda are open in a no-detection status and conducting in a detection status, whereas
terminals c and b are conducting in a no-detection status and open in a detection
status.

5)

After finishing the wiring, be sure to attach the cover. Be sure that the cover is tightly
mounted by screws.

0

24

(DC)

a

c

b

－9－

24V DC

Not
Use

Power source

N.O N.C

Relay output

Terminal alignment and wiring diagram

7.3 Conductor outlet
The cable runs through the conductor outlet of the product and is secured either with acable gland or with the cable tube that is connected to the housing. In either case, besure to prevent water running along the cable or cable tube from directly entering the
housing by configuring the connection of the cable and flexible tube downward first
and then upward. Improperly securing the cable with a cable gland or inadequate
connection of the cable tube may allow foreign material, such as dust and dirt, to enter
the housing or it may allow water to penetrate, resulting in malfunction of the product.
Be sure to mount the conductor outlet in the downward direction.

98.

Panel Description

Sub adjusting trimmer

Rough adjusting switch

Sensitivity selector switch
Delay timer
7 89

23
3

4

5

F01

2

6

CD E

AB

ＯＮ
1

Ｌ
456

Ｈ

Ｓ

DLY

Ｌ

Main adjusting dial
Pilot lamp

LEVEL SENSOR
Terminal block
POWER SOURCE

0

24

(DC)

OUT PUTacb

Panel diagram<Description of each unit>- Main adjusting dialThis dial is used to adjust the sensitivity according to the measuring objects. The
effective range of adjustment is “0 - 10” in scale with a half-turn of the dial. The dial itself
rotates without limit.
- Auxiliary adjustment trimmer (set by default)This is used during the initial setting of the main adjusting dial. The effective range ofadjustment is a half-turn from the horizontal position of the minus slot (the brown faceup and silver face down), but there is no limit on the rotation.
- Coarse adjustment switch (set by default)This switch is used when the adjustment exceeds the range covered by the auxiliary
adjustment trimmer. The switch turns in either direction, but at the initial setting, set theswitch to turn clockwise.
- Sensitivity selection switch (usually, the default is the general sensitivity setting)Sensitivity can be selected according to the measuring objects. For the method of
selection, refer to 10 “Initial Setting Procedure” on page 12.
- Pilot lamp (color in red)
The lamp turns on upon detection.
- Delay timer
Time from detection to output can vary between 0 and 10 seconds. The effective
adjustment range and rotation range is about 120° from S to L.
- Terminal block
Terminals for the power supply and relay output.

109. Adjusting Sensitivity
Use the main adjusting dial to adjust the sensitivity according to the property of themeasuring objects before using the product.
After finishing sensor mounting and wiring, follow the procedure below to adjust sensitivity.
Adjust sensitivity under actual measurement conditions when possible.
9.1 Checking the maximum adjustment position
Check this value when the tank is empty (no measuring object exists in the electrode
portion). Switch the power on and turn the main adjusting dial between “7.5 and 9.5”
until the pilot lamp turns on. This position corresponds to the maximum value of theadjustment range. The value is set to “8.0” by default but the set value may varydepending on the mounting conditions. For resetting the value outside the range
shown above, refer to section 10 “Initial Setting Procedure” on page 12.
9.2 Checking the minimum adjustment position
Check this value when the tank is filled with the measuring object up to the measuring
position. Be sure the electrode is buried in the measuring object. Check that the pilot
lamp has turned on. Turn the main adjusting dial to lower the value until the pilot lamp
turns off. This position corresponds to the minimum value of the adjustment range.
If the pilot lamp does not turn off after the main adjustment dial reaches “0,” then set
the minimum value to “0.” The minimum position varies depending on the property ofthe measuring objects and the sensitivity category. Check the value every time themeasuring object or sensitivity category changes.

9.3 Determining the adjustment position
The middle point between the two scalevalues checked in 1 and 2 described aboveis the sensitivity adjustment position. Turn

測定物に埋没させてThe
scale where the pilot lamp
パイロットランプがturns off with the electrode
消灯する目盛りburiedin the measuring object(minimumadjustment position)（最小調整位置）

感度調整位置Sensitivity adjustment position

the main adjustment dial to the sensitivity
adjusting position to finish the procedure. Do

The scale where the pilot

lamp turns on with no
測定物がない状態で
measuring object.
パイロットランプが(maximum adjustment
position)
点灯している目盛り（最大調整位置）not move the adjustment position up or
down more than necessary. Doing so may
cause the product to malfunction. Confirm
that the range of scale position checked at 1

11

Adjustment
example
調整例

and 2 described above exceeds the 1 scale.
If the range is 1 scale or less, the operation
may be unstable, and the product cannot be
used.
10. Initial Setting Procedure (Read this section if initial settings are required.)
The product settings have been configured at the factory as the default. The initial setting isrequired in the following cases:-The maximum adjustment position has shifted significantly due to mounting circumstances.
-The amplifier has been replaced with another that had been in use in another place or withanother electrode shape.
-Changes in the sensitivity category are required due to changes in the measuring objects
or other factors.
-The sensitivity category does not match the measuring object.
-Electrode dimensions have changed. (Such as wire length)-Others
Warning

The initial setting is performed with the power on. Pay special attention to
avoid touching the terminals. Touching terminals may cause electric shockor short circuits.

Caution: In the adjustment, pay attention to avoid applying excess stress on each part.
Make sure the tank is empty (no measuring object exists in the electrode portion).
You cannot make the adjustment if a measuring object exists in the tank. Keep thepower turned on. Pay attention to on-off operations of output that occur several times
during adjustment.
1)

Setting the sensitivity category: The product provides four sensitivity categories: Generalsensitivity, high sensitivity, low sensitivity, and ultra-low sensitivity. Use the sensitivity
selection switch to select a category.
General sensitivity:

Turn only “2” and “6” on.

SW1 SW2 SW3 SW4 SW5 SW6

ＯＮ

OFF

1

ON

OFF OFF OFF

ON

2

3

4

5

6

3

4

5

6

3

4

5

6

3

4

5

6

High sensitivity: Turn only "1” on.

SW1 SW2 SW3 SW4 SW5 SW6ON

OFF OFF OFF OFF OFF

ＯＮ
1

2

Low sensitivity: Turn only "3” and “6” on.

SW1 SW2 SW3 SW4 SW5 SW6OFF OFF
Ultra-low sensitivity:

ON

OFF OFFON

Turn only “4,” “5,” and “6” on.

SW1 SW2 SW3 SW4 SW5 SW6OFF OFF OFF

ON

ON

ＯＮ
1

2

ＯＮ

ON
1

2

感度切替スイッチ
Sensitivity
selection switch

12

About the rod-type electrode that the length is up to 200mm.
When you use it, turn on “5” of the sensitivity selection switch.

ＯＮ

General sensitivity:

Turn only “2” “5,” and “6” on.

SW1 SW2 SW3 SW4 SW5 SW6OFFON

OFF OFF

ON

1

2

3

4

5

6

3

4

5

6

3

4

5

6

3

4

5

6

ON

High sensitivity: Turn only "1” “5,” on.

ＯＮ

SW1 SW2 SW3 SW4 SW5 SW6ON

OFF OFF OFF

ON

OFF

1

2

Low sensitivity: Turn only "3” “5,” and “6” on.

SW1 SW2 SW3 SW4 SW5 SW6OFF OFF
Ultra-low sensitivity:

ON

OFF

ON

ON

ＯＮ
1

2

Turn only “4,” “5,” and “6” on.

SW1 SW2 SW3 SW4 SW5 SW6OFF OFF OFF

ON

ON

ON

ＯＮ
1

2

Sensitivity
selection switch
感度切替スイッチ

CautionThe product may malfunction,if you turn off “5” of the sensitivity selection
switch on the rod-type electrode that the length is up to 200mm.

"８．５"2) Adjust the main adjusting dial to the positionon the scale at “8.5.” This position is the
maximum value of the adjustment range.
主調整ダイヤル
Mainadjusting dial

3) Adjust the brown face of the auxiliaryＨ

adjustment trimmer to the “H” side and thesilver face (soldered face) to the “L” side.
Return the coarse adjustment switch once

Silver
銀色

Brown
茶色

Auxiliary 副調整トリマ
adjustment trimmer

to “0.” If the pilot lamp turns off in thisone at a time. Find the position where thepilot lamp changes from on to off. At thispoint, adjust the switch to the number
where the pilot lamp turns off.

13

45
23 6

pilot lamp turns on, increase the number

789

D
ABC E

situation, move to the next procedure. If the

F01

4)

Ｌ

粗調整ス
イッチ switch
Coarseadjustment

5)Turn the auxiliary adjustment trimmer
slowly toward the “H” side until it reaches

ＨＬ

the position where the pilot lamp changes
from off to on. If the pilot lamp does not turnon after turning the trimmer up by a

Auxiliary 副調整トリマ
adjustment trimmer

half-turn (the position where the brown faceＨand silver face are inverted), move to the

Ｌ Search
for a position
パイロットランプwhere
the pilot lampが消灯する位置を
turns
off.
探します。

next step.
6)

Return the auxiliary adjustment trimmer to

Auxiliary 副調整トリマ
adjustment trimmer

the status described in (3). Turn the coarseＨadjustment switch slowly counterclockwise

Ｌ Search
パイロットランプfor a position whereが消灯から点灯すthepilot lamp turns on from
る位置を探します。
theoff status.

to reduce the scale number by one. The
pilot lamp will turn on. Next, turn the

Auxiliary副調整トリマ
adjustment trimmer

auxiliary adjustment trimmer slowly to the“L” side until the pilot lamp turns off. Then,turn the trimmer slowly toward the “H” side
until it reaches the position where the pilot
lamp changes from off to on.

"８．０～８．５"

7) Reduce the scale number of the main
adjusting dial and check that the pilot lamp
主調整ダイヤル
Mainadjusting dial

turns off before it reaches “8.0.”

This completes the initial setting procedure. Implement the sensitivity adjustment
according to section 9 “How to Adjust Sensitivity” on page 11 before using the product.

11. Setting Delay Timer
This product provides a delay in time between detection of the measuring object and output
operation. Turning the trimmer of the delay timer in the direction of “L” increases the delay
time up to 10 seconds maximum for adjustment. The trimmer has stop positions in the S and
L directions. Do not turn the trimmer past these positions. Doing so may cause damage.
Rotation
range
回転範囲

Ｓ

Ｌ

Delay
timer
遅延タイマ

14

12. Troubleshooting
12.1 Trouble in adjustment
1)

In checking the maximum adjustment position, the pilot lamp does not turn on for themain adjusting dial scales between “7.5 and 9.5.”---Check that the power supply is on and the power supply side is properly wired.

2)

In checking the maximum adjustment position, the pilot lamp remains turned on anddoes not turn off.
---Check that any stay exists close to the electrode.
---Check for condensation.

3)

In checking the minimum adjustment position, the minimum position does not
become stabilized.
---Check that the tank and the electrode are properly grounded.
---Check that the electrode is properly buried in the measuring object.

4)

In checking the minimum adjustment position, the range between the maximum value
and the minimum value does not exceed 1 scale.
---Check the situation by raising the sensitivity category.
---Check whether precautions on mounting the electrode were properly observed;
the distance of the electrode from the tank wall should be 100 mm or more, andthe protrusion of the ground electrode from the short tube nozzle should be 10 mm
or more.

5)

Detection works but no output is obtained.
---Check whether wiring on the output side is properly implemented.

12.2 Trouble during use
1)

The product does not detect that the measured object has exceeded the measuring
position.
---Confirm the angle of repose and check for a bridge.
---Check whether the sensitivity adjustment position is too low for use.

2)

The product detects that the measured object has exceeded the measuring positioneven though the object is actually still under the measuring position.
---Check whether the sensitivity adjustment position is too high for use.

3)

The level of the measured object has reduced below the measuring position but thedetection status is not released.
---Check for residual measured object such as dead stock.

4)

Detection performance does not stabilize.
---Check the vicinity for noise sources such as a motor, pump, or inverter.

5) The product is frozen in the detection status.
---Check for adhesion of the measured object to the electrode portion.
---Check for condensation inside the chassis and the electrode.
6) The product stopped outputting signals or is frozen in the output status.
---Check the contact resistance between the output terminals. (The normal value is1Ω or less.)
If check actions described above do not improve the problem, please contact our sales
representatives.

1513. MaintenanceWarning In implementing maintenance and inspections, be sure to shut off thepower supply and the power to the output except for checking theoperations. Failure to do so may result in danger of electric shock, electricleaks, and short circuits or combustion.
Check
point

Check
periodWeeklyMonthly

Electrode

Check item

ActionCheck for adhesion of themeasured object

Cleaning

VisualCheck for parts displacement,

RepairParts

Visualcracks, and deformation

replacement

Without Amplifier,check that theEvery
6 months

detection electrode and the

RepairParts

ground electrode is 10 MΩ orreplacement

insulation resistance between themore.
WeeklyWeeklyCheck that the cover has beentightly fixed.
Check for intrusion of dirt, water,
dust and other objects.

ChassisMonthly

Check method

Check for corrosion,condensation, and deformation.

Tightening

DC 500 V
Insulationresistance
meter
Visualtouching

andCleaning
Actions against Visual
intrusion paths
RepairParts
replacement
VisualCheck of use
environment

MonthlyMonthly
AmplifierEvery
6 months

Check the O-ring for cracks or

Partsdeterioration.

replacement

Check for loosened screws.

Additionaltightening

Screw driver

Amplifierreplacement

DC500V
Insulationresistancemeter

Amplifierreplacement

Screw driverand others
TesterCheck that the insulation
resistance between each externalterminal(except 0,24 terminal) andthe chassis is 10MΩ or more.
Turn on the power and check that

Visualthe pilot lamp turns on and output
Operation

Monthlyswitching is operating when thescrew at the center of amplifierboard is touched with a metallic
object such as a screwdriver.

16