Chino IR-M22 SERIES, IR-M21 SERIES Instructions Manual

INST No INE -403-0P0

IR-M2

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Series

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INFRARED MOISTURE METER
DESIGNED AS A FIBER OPTIC

(Model : IR-M21

□□

,IR-M22

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)

Please be sure to deliver these instructions
with the unit to the end user.

Always keep these instruction with the unit.

INST No INE -403-0P0

 −C1−

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Request to designers, instrument controllers, and sale agents

Delivery this instruction manual to the operator of this instrument without fail.

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Request to the operator of this instrument

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This instruction manual is necessary for maintenance, too. Keep this manual with due
care until the instrument is discarded.

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FOR SAFE USE

For the purpose of using this unit safely, observe the following cautions for safety during
the operation, maintenance, and repair of this unit without fail.
Take safety measures separately against wrong operation, troubles, and other circumstances
of this unit.

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●The following warning mark is struck to this unit to enable users to use

this unit safely. 

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●This instruction manual uses the following symbol marks for safe use. 

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PREFACERequests and notices

Thank you for your purchase of IR-M21□□□□, IR-M22□□□□series Infrared
m oisture meter designed as a fiber optic. Please read this instruction manual without fail
for using this instrument correctly and safely and also preventing troubles in advance.

1.For the contents of this manual, alteration is reserved without notice in the future.

2.This manual has been prepared by making assurance doubly sure about its contents.

However, if any question arises or if any error, an omission, or other deficiencies
were found, please inform your nearest CHINO’s sales agent of them.

3.Y ou are requested to understand that CHINO is not responsible for any operation

results.

Note

This warning mark is struck to the portions being subject to an electric shock

acc

ident. Turn off the power supply of the feed source without fail before starting

wiring, maintenance, and repair.

Observe this caution item strictly for avoiding a danger, otherwise
negligence of this caution may possibly cause troubles of this unit and
accidents

Observe this caution item strictly, otherwise negligence of this caution
may cause the damage of the unit or measuring errors.

This mark is described in each title covering      or  
instructions.

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War ning

Caution

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Warning

DANGER

Refere nce

Information that you can use as a reference.

INST No INE -403-0P0

 −C2−

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Power supply

Make sure that the power voltage of this unit meets the feed power voltage without fail
before feeding power to this unit.

●

Protective grounding

Perform the protective grounding without fail before turning on the power supply of this
unit for the purpose of preventing an electric shock accident.

●

Necessity of protective grounding

Don’t cut the internal or external protective grounding wire of this unit nor disconnect
the wiring at the protective grounding terminal.

●

A defect of protective functions

Don’t operate this unit, if the protective grounding, fuse, or other protective functions
seem to be defective. Check the protective functions for defects before operating this
unit.

●

Use in a gaseous atmosphere

Never operate this unit at a place where a combustible gas, an explosive gas or their
vapors exist., otherwise a very dangerous accident will occur.

●

Never touch the interior by hand.

This unit is internally provided with high-voltage circuits. Never touch the interior by
hand when the voltage is applied to this unit.

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External connections

Perform the protective grounding securely without fail before connecting this unit to a
measuring object and/or an external control circuit.

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CAUTIONS FOR SAFETY

INST No INE -403-0P0           

−C3−

CONTENTS

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1.General

････････････････････････････

1

1.1Summary

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･

1

1.2Configuration

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･

1

2 .Model s and accessories

･････････････････

2

2.1Models･････････････････････････････ 2

2.1.1 Detector unit

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･

2

2.1.2 Reflective type fiver

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･

2

2.1.3 Output checker plate for reflective
type fiver optics

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･

2

2.1.4 Reflective type fiver opt ics with lens attachment 2

2.1.5 Output checker plate for reflective
type fiver optics with lens attachment

･ ･･･ ･･･ ･

2

2.1.6 Transparent type fiver optics

･ ･･･ ･･･ ･･･ ･･･

2

2.1.7 Measuring cell for liquids

･ ･･･ ･･･ ･･･ ･･･ ･･

2

2.1.8 Connection cable

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･

2

2.2Accessories

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･

2

3.Setting

･････････････････････････････

3

3.1Settin g of dispswitches ･･････････････････ 3

3.2Installation of reflective type fiver optics ･･････ 5

3.2.1 Installation of tip part･･･････････････････ 5

3.2.2 Air purge(Only IR-WCRN)･･････････････ 6

3.2.3 Connections with detector unit ････････････ 6

3.2.4 Optical path ･････････････････････････ 7

3.2.5 Measuring place

(for objects of pulverized or granul ar substance) 7

3.2.6 For the objects in sheet state such as paper, etc．7

3.3Installation of transparent type fiver optics ････ 8

3.3.1 Installation of cell for liquids ･･････････････ 8

3.3.2 Connections with detector unit ････････････ 9

3.3.3 Disassemble cleaning ･･･････････････････ 9

3.4Installation of detector unit ･･･････････････10

3.4.1 Outside and mounting dimensions of

detector unit ･････････････････････････10

4. Connections

･････････････････････････

11

4.1Connections

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･

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4.2Layout of connection cable

･ ･･･ ･･･ ･･･ ･･･ ･･

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4.3Multi -detector connections

･ ･･･ ･･･ ･･･ ･･･ ･･

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4.3.1 Connections through relay box

･ ･･･ ･･･ ･･･ ･･･

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4.3.2 Connections without rela y box

･ ･･･ ･･･ ･･･ ･･･

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5．Names and functions of component parts

･･･

14

5.1Names and functions of detector unit

･ ･･･ ･･･ ･

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5.2Names and functions of setting display part

･ ･･･

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6. Operation

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6.1Confirmation before operation

･ ･･･ ･･･ ･･･ ･･

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6.2Setting of detector unit number

･ ･･･ ･･･ ･･･ ･･

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6.3Setting of calibration curve data

･ ･･･ ･･･ ･･･ ･･

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6.3.1 Setting data

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･

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6.3.2 Setting of calibration curve data

･ ･･･ ･･･ ･･･ ･

18

6.4Preparation of calibration curbe
by knee point line approximation

･ ･･･ ･･･ ･･･ ･

18

6.4.1 Setting of knee point data

･ ･･･ ･･･ ･･･ ･･･ ･･･

18

6.4.2 Knee point line setting data

･ ･･･ ･･･ ･･･ ･･･ ･･

19

6.4.3 Setting of calibration curbe data

for knee point line approximation

･ ･･･ ･･･ ･･･

20

6.5 Setting of operating conditions

･ ･･･ ･･･ ･･･ ･･･

21

6.5.1 Setting data

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･

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6.5.2 Setting

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･

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6.6Calibration

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･

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6.7Setting of calibration curve number･････････24

6.8Correction of calibration curve

･ ･･･ ･･･ ･･･ ･･

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7.Preparation of calibration curve

･･････････

25

7.1Sample preparation ････････････････････ 25

7.1.1 Powder or guranular

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･

25

7.1.2 Paper(sheet substance)

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･

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INST No INE -403-     

−C4− 

7.1.3 Liquid

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･

26

7.2Sample measuremernt ･･････････････････ 27

7.2.1 Powder or granular

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･

27

7.2.2 Paper(sheet substance)

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･

28

7.2.3 Liquid

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･

28

7.3Preparation of calibration curves･･･････････ 29

7.3.1 Computation of regression expression

･ ･･･ ･･･ ･

29

7.3.2 Confirmation of regression expression

･ ･･･ ･･･

30

8.Correction function by sample temprature
from external input (option)

････････････

31

8.1Summary ･･･････････････････････････ 31

8.2Model･･････････････････････････････ 31

8.3Wiring of detector unit ･･････････････････ 31

8.4S etting of dipswitch ････････････････････ 31

8.5Setting of correction enabled/disabled

by sample temperature ･････････････････ 32

8.5.1 Setting at the detector unit

･ ･･･ ･･･ ･･･ ･･･ ･･･

32

8.5.1 Setting at the display unit

･ ･･･ ･･･ ･･･ ･･･ ･･･

32

8.6Setting of sample temperature scaling
(Only 4 to 20mA DC) ･･･････････････････ 33

8.6.1 Setting at the det ector unit

･ ･･･ ･･･ ･･･ ･･･ ･･･

33

8.6.2 Setting at the display unit

･ ･･･ ･･･ ･･･ ･･･ ･･･

33

8.7Setting of sample temperature ････････････ 33

8.8Setting of calibration curve data ･･･････････ 34

8.9Measurement ････････････････････････ 35

8.10Display of sample temperature Ts ･････････ 35

8.10.1 Display at the detector unit

･ ･･･ ･･･ ･･･ ･･･ ･

35

8.10.2 Display at the set ting display unit

･ ･･･ ･･･ ･･･

35

9.Inspection and maintenance

･････････････

35

9.1Periodical inspection ･･･････････････････ 35

9.2Self-diagnosis function ･･････････････････ 36

9.3 Measures against troubles not included in

self-diagnosis ･････････････････････････ 37

9.4Maintenance parts･････････････････････ 38

9.4.1 List of maintenance parts

･ ･･･ ･･･ ･･･ ･･･ ･･･

38

9.4.2 Repla cement of light source lamp

･ ･････････ ･

38

9.4.3 Replacement of motor

･ ･････････ ･････････

39

9.4.4 Replacement of lithium batterty

･ ･･･ ･･･ ･･･ ･･

40

9.4.5 Replacement of power supply unit

･ ･･･ ･･･ ･･･

41

9.4.5 Ram clearing

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･ ･･･

41

10.Specifications

･･･････････････････････

42

10.1Detector unit ････････････････････････42

10.2Fiver optics ･････････････････････････43

10.2.1 Reflective type fiver optics IR-WCRN

･ ･･･ ･･･

43

10.2.2 Output checker plate for reflective type
fiver optics IR-WCNB

･ ･･･ ･･･ ･･･ ･･･ ･･･ ･

43

10.2.3 Raflective type fiver optics with lens IR-WCRE 43

10.2.4 Output checker plate for reflective type

fiver optics with lens IR-WCREB

･ ･･･ ･･･ ･･･

43

10.2.5 Measuring cell for liquid IR-WCC1

･ ･･･ ･･･ ･

44

10.2.6 Transparent type fiver optics IR-WCT

･ ･･･ ･･

44

10.3Accessories ･････････････････････････44

10.3.1 Power supply unit (conforming to CE) IR-WEP 44

10.3.2 Connection cable IR-WERT

･ ･･･ ･･･ ･･･ ･･･

44

CONTENTS

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INST No. INE -403-0P0

−1−

1.1 Summary

The infrared moisture meter IR-M2 series is designed as a fiber optic moisture meter for
on-line moisture meter utilizing infrared absorption of moisture, and it consists of a detector
unit, a fiber optics, a setting display unit and accessories.
The detector unit is provided with 99 built-in calibration curves to output linear analog
signals according to the moisture.
Since the detector unit provides keys, digital displays and communications function, it can be
used as a single unit or combined with a personal computer.
Two kinds of fiber optics, reflective type and transparent type, are available. The reflective
type fiber optics is for moisture measurement in powder state or in sheet state objects and the
transparent type fiber optics is for moisture measurement in liquids by combining with a
measuring cell for liquids.
Up to 9 detector unit can be connected with the setting display unit which can set various
parameters of the detector unit and displays the moisture value digitally.
Accessories including cables and output checker plate are available for various applications.
This manual describes about the detector unit, the fiber optics (reflective type and transparent
type), the measuring cell for liquids and accessories.
For the setting display unit, refer to a separate instruction manual for it.

1.2 Configuration

1. General

C H DATA

Transpa rent type fib er op tics

IR-WCT

Reflective type fiber opticswith lens attachment IR-WCRE

Reflective type fiber opticsIR- WCRN

Measuring
cell fo rliquids

IR-WCC1

Detector:Model for IR-M2

Analog output

IR-WERT
(connection
cable)

24V DC

IR-WEP
(power supply unit)

IR- GMEG1
(settin g displayunit)

Optical
fiber

RS- 485

Communication and
Analogoutput

INST No. INE -403-0P0

−2−

2.1 Models

2.1.1 Detector unit IR-M2    

Measurement object

1 : Universal type
2 : High moisture type

Fiber optics combined

0 : Reflective type
5 : Transparent type

External input/output

0 : Moisture output 4 to 20mA (Standard)
5 : Correction input 4 to 20mA (Option) *1

8 ：Correction input Pt100 (Option) *1

Communications interface

S : RS-485 (Standard) *2
R : RS-232C (Option)
A : RS-422A (Option) *1

Special specification

Blank: None

x: Other special specification

2.1.2 Reflective type fiber IR-WCRN

   

2.1.3 Output checker plate for IR-WCRNB

reflective type fiber optics

2.1.4 Reflective type fiber optics with lens attachment  IR-WCRE

2.1.5 Output checker plate for reflective

type fiber optics with lens attachment      IR-WCREB

2.1.6 Transparent type fiber optics          IR-WCT

2.1.7 Measuring cell for liquids     IR-WCC1

2.1.8 Connection cable          IR-WERT

2.2 Accessories

Component name Quantity



Remarks

Power supply unit (IR-WEP) 1no. S82K-05024 (Omron)
Fuse 2 nos. SMP20 (Daito)
Instruction manual 1 copy This document
Communications instruction manual 1 copy Attached to IR-M2R/A only
Inspection certificate 1 copy

2. Models and accessories

*1:

Combination of “5”

or “8” of

optional

external I/O and
communications
interface “A” is not

possible.

*2:Specify “S” for

combination with the
setting display unit.

INST No. INE -403-0P0

−3−

3.1 Setting of dipswitch es

Set the internal dipswitches before installation of the detector unit.

1) Open a door, remove 4 screws for fixing a setting display part and then remove the setting
display part.

2) The setting display part is connected to the interior through cables. Lift the setting display
part with due care so as not to damage the cable and disconnect the connector for the
setting display part at the position shown in the figure.

3) Set the dipswitches according to the working conditions.

3. Setting

Turn off the power supply before removing the setting display part. War ning

Loosen the se fou rscrews

CH

DATA

△

△▽

SEL

ENT

CH/

□

DIP switch 1

Connector fordisplay

！

INST No. INE -403-0P0

−4−

3.1 Setting of dipswitch es

SW Dipswitch

No

Function

OFF ON

Defaults

1 Measurement/

Calibration mode

Measurement
mode

Calibration
mode

OFF (Don’t change.)

2 Mathematical

operation format

Logarithm
operation

Ratio operation ON (Don’t change.)

3 No.2 calibration

enable/disable

Disable Enable OFF

4 Connection

destination

Setting display

unit

PC

OFF : IR-M2 S
ON : IR-M2R
  IR-M2A

5 Key/display

enable/disable

Enable Disable OFF

6 Not used OFF
7

Correction input

enable/disable

Disable Enable OFF

8 Correction input 4 to 20mADC Pt100 OFF

3. Setting

1 2 3 4 5 6 7 8

O
N

DIP switch 1

INST No. INE -403-0P0

−5−

3.2 Installation of reflective type fiber optics

There are two types of reflective type fiber optics. One is “Without lens (IR-WCRN)” and
the other is “With lens (IR-WCRE)”.

3.2.1 Installation of tip part

Set an attached holder to the installation place first. Insert the tip of fiber optics into the hole
of the holder and fix it by tightening the tip fixing screw. Two types of holder, horizontal
mounting type and flange type are attached.

The tip of reflection
type fiberoptics with
lens attachment

The tip of reflection type

fiber opticswith lens attachment

23 27

84

64

(

Ø

3

0

)

(

Ø

3

0

)

64
80

12

30

42

12

70

28

2-Ø9Mountinghole

2-Ø9Mounting hole

Tipfixing screw

Tipfixing
screw

Place the tip of fiber optics with t

he following measurement distance from

an object. ・Reflective type fiber optics 15 to 50mm

・Reflective type fiber optics with lens 25 to 100mm

War ning

Fix the fiber optics with appropriate metal tools at several places

for

avoiding affect with vibrations, etc. Make sure not to bend the fiber

optics

below its minimum bending radius (100R).

Warning

[ Model for IR-WCRN ]

15mm

Ø

50

Ø

20

Ø

6

[ Model for IR-WCRE ]

100m

25mm

Ø

40

Ø

25

Ø

20

Tipfixing screw

17

14

40
50 16

7

The tip of reflectiontype fiberoptic s

(

Ø

1

6

)

2-Ø6.6Mountingho le

(

Ø

1

6

)

2-

Ø5.5

Mountinghole

The tipof reflection

typefiber optics

44

8

27

16

48

38

25

Tipfixingsc rew

1)Reflection-typefiber

2)Reflectiontypefiberoptics
withlensattachment

3. Setting

！

INST No. INE -403-0P0

−6−

Purgeair
inlet

Purge air flow:50 to 200Nl/min
Purge air pressure:Lower than200kPa

3.2.2 Air purge (Only IR -WCRN)

When air purging is required, supply dry air not
containing oil, dust, etc. from a purge air inlet.
Connect a nylon tube of φ6mm in outer diameter and
φ4mm in inner diameter to the purge air inlet.
(When the reflection type fiber optics is used in
ambient temperature more than 60°C, remove the
purge air inlet and pipe to the screw hole of RC1/8
directly .

Purge air flow: 5 to 20NI/min
Purge air pressure: Less than 200kPa (2kgf/cm2)

3.2.3 Connection s with detector unit

Connect the side being separated into two parts of light projecting side and light receiving
side with the fiber optics connectors of the detector unit.

The fiber optics has “Light project ing

side (D)”and “Light receiving side

(E)”and each one has a carved mark. Connect the fiber optics through the
rubber bush as shown in the following figure.

War ning

3. Setting

！

Connector forfiber
[Light projecting side]

Connector forfiber
[Light receivingside]

Dent department

Protrusiondepartment

D E

Rubberbush

Bushfittingring

Connector ring

Optical fiber

D:Connect tolight projectingside E:Connectto light receivingside

INST No. INE -403-0P0

−7−



3.2.4 Optical path

Select a place where water drops, dust particles, smoke, water steam, etc. will not enter
between the tip of fiber optics and an object. If these substances cannot be prevented and
their influences are negligible, purge them with air, or other remedial measure is necessary.
If direct current (DC) light like the natural light, which does not change its intensity
momentarily , comes to an object, it does not cause any disturbance in measurement, but
alternate current (AC) light like as electric bulb, flame, etc., causes disturbance. Further,
strong light such as direct sunlight also causes disturbance. In such cases, it is necessary to
shade the disturbing light to prevent it from direct shining on an object.

3.2.5 Measuring place (for objects of pulverized or granular substance)

For installation of the tip of fiber optics on on-line, select a place where the moisture
difference is small between the surface and the inside of an object, like as at a hopper outlet
or just behind the conveyor belt transfer place. If such a place cannot be selected, face the
inside to the surface by using a baffle plate during measurement as shown in the figure.

3.2.6 For the objects in sheet state such as paper, etc.

Tilt the tip of fiber optics by 15° from the vertical face as shown in the figure.

3. Setting

Baffle plate

Measuringobject

Belt conveyor

Paperor
othersheets

15°

INST No. INE -403-0P0

−8−

3. Installation of transparent type fiber optics

3.3.1 Installation of cell for liquids

Install a measuring cell to flow a sample liquid from down to up. Connect with the fiber optics
between the detector unit and the measuring cell. Make sure to connect the light projecting side
and the light receiving side of the fiber optics to the correct sides of the detector unit and the
measuring cell.

Fix the fiber optics with appropriate metal tools at several places for

avoiding affect with vibrations, etc.
Make sure not to bend the fiber optics below its minimum bending

radius

(250R).

War ning

C H D ATA

Detector:Mode l for IR-M2

Power supply unit:

Model for IR-WEP

Setting display unit:

Model for IR- GMEG1

Measuring cell

Output

Input of
sample liquid

Light receiving side fiber optics

Light projecting side fiber optics

Fixthe fiberoptics with appropriatemetaltools atseveral places.

3. Setting

！

INST No. INE -403-0P0

−9−

3.3.2 Connection with detector unit

Connect the fiber optics, as shown in the following figure, through the rubber bush attached
to the detector unit .

3.3.3 Disassemble cleaning

For accurate measurements, recommend periodical cleaning of the cover glass in a liquid
contacting part of the measur ing cell.

1) Remove the fiber optics (both of light
projecting side and light receiving side),
from the measuring cell.

2) Next, remove 4 screws fixing a connecting
part and remove the connecting part from
the liquid-contacting part.

3) Remove a fitting ring by using the tool A.
Then after screwing the tool B into the
cover glass, pull out the cover glass from
the liquid-contacting part.

4) Wipe off dirt on the glass surface with a
gauze, etc.

5) Confirm that an O ring is inserted in
liquid-contacting part and push in the
cover glass to the liquid-contacting part.

6) Match the positions of E and D characters
of the connecting part and the liquid
contacting part, and fix the connecting
part.

7) After the cleaning of the cover glass, make
sure to re-calibrate your moisture meter.

3. Setting

OUT

I N

Connectingpart

4- Fixingscew

Liquidcontacting
part

Tool A

ToolB

Fittingring

Curler

Cover glass

Oring

Connector for fiber
[Lightprojectingside ]

Connector for fiber
[Lightreceiving side]

Dent department

Protrusion department

D

E

Rubberbush

Bushfittingring

Connector ring

Optical fiber

D:Connect to light projectingside E:Connectto light receivingside

INST No. INE -403-0P0

−10−

3.4 Installation of detector unit

The detector unit is a wall-mounting type with 4 mounting holes. Fix the detector unit to wall
surface, etc. with 4 pieces of M8 screw. The outside and mounting dimensions are shown in
the figure.

3.4.1 Outside and mounting dimensions of detector unit

115

2

270

180

3 03 0

98

10

12

2323

74.5

47

47

165

145

125

4-M8Mountin g hole

Vibrations and impacts

Use the detector unit in a place where is free of any noticeable

vibrations

or impacts.

War ning

Induction

The detector unit is designed for anti-induction. However separate

the

detector unit from induction heating oscillators or power

lines as far as

possible.

War ning

Ambient temperature and humidity
The ideal ambient temperature of the detector unit is 10 to 30°C

and the

ambient humidity as low as possible is recommended. In high

humidity

environment,

you may have error in measurement due to condensation of

steam by change in temperature.

War ning

3. Setting

！