YOKOGAWA PH8ERP User manual

User’s
Manual
Model PH8ERP
KCl Rellable type pH Sensor
IM 12B7K1-02E
IM 12B7K1-02E
11th Edition

IM 12B7K1-02E
<INTRODUCTION><INTRODUCTION> ii
INTRODUCTION
This manual covers the PH8ERP KCl Rellable type pH Sensor.
Other related items are described in the following manuals.
Model Title IM No.
PH8HG Drop-in Guide Pipe IM 12B7M2-01E
PH8HF, PH8HFF Flow-Through Type Holder IM 12B07N01-01E
PH8HS, PH8HSF Submersion Type Holder IM 12B07M01-01E
HH350G Well Bucket Type Holder IM 19H1B1-01E
PB350G Float Type Holder IM 19H1E1-01E
PB360G Vertical Type Float Holder IM 19H1E2-01E
FLXA402 4-Wire Converter IM 12A01F01-02EN
IM 12A01F02-01EN etc.
PH450G pH/ORP Converter IM 12B07C05-01E
PH202 pH/ORP Transmitter IM 12B07D02-01E
PH202SJ TIIS Intrinsic safe pH/ORP Transmitter IM 12B07D02-11E
FLXA202, FLXA21 2-Wire Liquid Analyzer IM 12A01A02-01E
WTB10-PH¨Terminal Box IM 19D01B01-01E
PH8TBG Terminal Box IM 12B07W01-01E
PH8AX Accessories for pH Meter IM 12B07W03-01E
SA11 SA11 Smart Adapter IM 1206S01-00EN-(P)
IM 1206S01-01Z1-(P)
n Trademark Acknowledgments
• FLEXA, FLXA, SENCOM and FieldMate are trademarks or registered trademarks of
Yokogawa Electric Corporation.
• All other company and product names mentioned in this user’s manual are trademarks or
registered trademarks of their respective companies.
• We do not use TM or ® mark to indicate those trademarks or registered trademarks in this
user’s manual.
Media No. IM 12B7K1-02E 11th Edition : Dec. 2018 (YK)
All Rights Reserved Copyright © 1996, Yokogawa Electric Corporation
11th Edition : Dec.14,2018-00

IM 12B7K1-02E
<INTRODUCTION> ii
 For the safe use of this equipment
n Notes on Handling User’s Manuals
• Please hand over the user’s manuals to your end users so that they can keep the user’s
manuals on hand for convenient reference.
• Please read the information thoroughly before using the product.
• The purpose of these user’s manuals is not to warrant that the product is well suited to any
particular purpose but rather to describe the functional details of the product.
• No part of the user’s manuals may be transferred or reproduced without prior written
consent from YOKOGAWA.
• YOKOGAWA reserves the right to make improvements in the user’s manuals and product at
any time, without notice or obligation.
• If you have any questions, or you nd mistakes or omissions in the user’s manuals, please
contact our sales representative or your local distributor.
n Safety, Protection, and Modication of the Product
• In order to protect the system controlled by the product and the product itself and ensure
safe operation, observe the safety precautions described in this user’s manual. We assume
no liability for safety if users fail to observe these instructions when operating the product.
• If this instrument is used in a manner not specied in this user’s manual, the protection
provided by this instrument may be impaired.
• If any protection or safety circuit is required for the system controlled by the product or for
the product itself, prepare it separately.
• Be sure to use the spare parts approved by Yokogawa Electric Corporation (hereafter
simply referred to as YOKOGAWA) when replacing parts or consumables.
• Modication of the product is strictly prohibited.
• The following safety symbols are used on the product as well as in this manual.
WARNING
This symbol indicates that an operator must follow the instructions laid out in this manual in order
to avoid the risks, for the human body, of injury, electric shock, or fatalities. The manual describes
what special care the operator must take to avoid such risks.
CAUTION
This symbol indicates that the operator must refer to the instructions in this manual in order to
prevent the instrument (hardware) or software from being damaged, or a system failure from
occurring.
CAUTION
This symbol gives information essential for understanding the operations and functions.
NOTE
This symbol indicates information that complements the present topic.
n Warning and Disclaimer
The product is provided on an “as is” basis. YOKOGAWA shall have neither liability nor
responsibility to any person or entity with respect to any direct or indirect loss or damage arising
from using the product or any defect of the product that YOKOGAWA can not predict in advance.
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IM 12B7K1-02E
<INTRODUCTION><INTRODUCTION> iiiiii
n Compliance with the simple apparatus requirements
PH8ERP meet the simple apparatus requirements dened in the following standards.
Note: TIIS certied types cannot be connected.
Use the sensors under the conditions of use required by the standards.
Applicable standards:
ANSI/ISA-60079-11 (2014)
ANSI/ISA-60079-0 (2009)
CAN/CSA-C22.2 NO. 60079-11:14
CAN/CSA-C22.2 NO. 60079-0:11
방호장치 의무안전인증 고시
GB 3836.4-2010
Conditions of use:
(1) Use in combination with an internally isolated transmitter, or use with, a transmitter in
combination with isolated barrier.
The FLXA21 is internally isolated.
(2) Upper limit of the process temperature.
The upper limit of process temperature is indicated below when the sensor is used in
combination with a YOKOGAWA transmitter.
For FLXA21, model and su󰀩x code below is available.
FLXA21-D-□-D-EA-P1-○-A-N-LA-N-NN
□ can be any value.
○ must be NN or P1.
Any option code is available.
For PH202S, model and su󰀩x code below is available.
PH202S-○-E
○ must be C or U.
There are no PH202S models that meet the Korean explosion proof standards.
Any option code is available.
Upper limit of process temperature on the PH8ERP
Transmitter used in combination FLXA21 PH202S
Ambient temperature Ta
Temperature class 40°C 60°C 40°C 60°C
T6 16 16 28 28
T5 80 31 80 43
T4 80 66 80 78
T3 80 80 80 80
T2 80 80 80 80
T1 80 80 80 80
Other warnings are provided in the following.
WARNING
Handling precautions:
(1) Potential electrostatic charging hazard Electrostatic charge may cause an explosion hazard.
Avoid any actions that cause the generation of electrostatic charge, e.g., rubbing with a dry
cloth.
(2) With sensors that have a solution ground tip made of titanium (-TN), ignition sources due to
impact and friction sparks are excluded.
(3) IEC60079-14 (Electrical installations in hazardous areas) requires a label indicating ‘simple
apparatus’, stick this label to this sensor if necessary.
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IM 12B7K1-02E
<INTRODUCTION> iv
 After-sales Warranty
n Do not modify the product.
n During the warranty period, for repair under warranty consult the local sales
representative or service o󰀩ce. Yokogawa will replace or repair any damaged
parts. Before consulting for repair under warranty, provide us with the model
name and serial number and a description of the problem. Any diagrams or
data explaining the problem would also be appreciated.
l If we replace the product with a new one, we won’t provide you with a repair report.
l Yokogawa warrants the product for the period stated in the pre-purchase quotation
Yokogawa shall conduct dened warranty service based on its standard. When the
customer site is located outside of the service area, a fee for dispatching the maintenance
engineer will be charged to the customer.
n In the following cases, customer will be charged repair fee regardless of
warranty period.
• Failure of components which are out of scope of warranty stated in instruction manual.
• Failure caused by usage of software, hardware or auxiliary equipment, which Yokogawa
Electric did not supply.
• Failure due to improper or insu󰀩cient maintenance by user.
• Failure due to modication, misuse or outside-of-specications operation which Yokogawa
does not authorize.
• Failure due to power supply (voltage, frequency) being outside specications or abnormal.
• Failure caused by any usage out of scope of recommended usage.
• Any damage from re, earthquake, storms and oods, lightning, disturbances, riots, warfare,
radiation and other natural changes.
n Yokogawa does not warrant conformance with the specic application at the
user site. Yokogawa will not bear direct/indirect responsibility for damage due
to a specic application.
n Yokogawa Electric will not bear responsibility when the user congures the
product into systems or resells the product.
n Maintenance service and supplying repair parts will be covered for ve years
after the production ends. For repair for this product, please contact the
nearest sales o󰀩ce described in this instruction manual.
11th Edition : Dec.14,2018-00

IM 12B7K1-02E
<CONTENTS> v
Model PH8ERP
KCl Rellable type pH Sensor
CONTENTS
IM 12B7K1-02E 11th Edition
INTRODUCTION.............................................................................................i
 For the safe use of this equipment.............................................................ii
 After-sales Warranty ...................................................................................iv
1. Specication ............................................................................................. 1-1
1.1 Standard Specications................................................................................... 1-1
1.2 Model and Su󰀩x codes.................................................................................... 1-2
1.3 External Dimensions ........................................................................................ 1-4
2. Installation................................................................................................. 2-1
2.1 Preparation for Installation .............................................................................. 2-1
2.1.1 Unpacking and Inspection ................................................................. 2-1
2.1.2 Installing Holder ................................................................................. 2-1
2.1.3 Installing Associated Instruments ...................................................... 2-1
2.2 Requirements for mounting the pH sensor ................................................... 2-2
2.2.1 In case of installing the PH8HG Guide-pipe Holder .......................... 2-2
2.2.2 Installing Sensor in PH8HS Submersion Holder ............................... 2-3
2.2.3 Installing Sensor in PH8HF Flow-through Holder .............................. 2-6
2.3 pH Sensor Cable Wiring Procedure................................................................ 2-7
2.3.1 Connecting Sensor Cable to Terminal Box ........................................ 2-7
2.3.2 Connecting Sensor Cable to Two-wire pH Transmitter ................... 2-10
2.3.3 Connecting Sensor Cable to Four-wire pH Converter ..................... 2-11
2.3.4 Connecting to FLXA202/FLXA21 .................................................... 2-11
2.3.5 Connecting to FLXA402 ................................................................... 2-11
3. Maintenance on operation....................................................................... 3-1
3.1 Operation and Periodic Maintenance ............................................................. 3-1
3.1.1 Calibrating pH Sensor Using Bu󰀨er Solutions ................................... 3-1
3.1.2 Cleaning Glass Electrode and Liquid Junction .................................. 3-1
3.1.3 Relling Sensor with KCl Solution ..................................................... 3-1
3.2 Replacing Consumable Parts.......................................................................... 3-3
3.2.1 Replacing Glass Electrode ................................................................ 3-3
3.2.2 Replacing Liquid Junction .................................................................. 3-3
3.2.3 Replacing O-rings for Glass Electrode .............................................. 3-4
Customer Maintenance Parts List......................................CMPL 12B07K01-02E
Revision Information ...............................................................................................i
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IM 12B7K1-02E
  <1.Specication> 1-1
1. Specication
The Model PH8ERP KCl Rellable pH Sensor features maintainability which involves no KCl
solution coming out of the liquid junction.
This sensor can be mounted on either an PH8HF ow-through holder or an PH8HS submersion
holder. The sensor can be submerged up to a maximum of 3 meters, depending on the
specication.
1.1 Standard Specications
Measurement: Hydrogen ion concentration (pH) of a solution
Measurement principle: Glass electrode method
Measuring range: pH 2 to 12
Installation: Mounting in PH8HS submersion holder
Mounting in PH8HG guide-pipe holder
Mounting in PH8HF ow-through holder
Note: If any of the following solutions are measured, install the sensor either in a ow-through or submersion holder.
• A strong acid solution is to be measured (e.g., aqua regia, chromic acid, hypochlorous acid or perchloric acid, etc.).
• The solution contains corrosive gases (e.g., ammomia, chlorine, hydrogen sulfide, etc).
• The solution contains a small percentage of organic solvent or oil.
Solution temperature: -5 to 80°C (refer to Table 1)
Table 1. Process Temperature Range
Holder Type Holder
Material Cleaner Solution
pH Range
Solution
Temperature
(°C)
Guide-pipe
(PH8HG) (*2)
PVC None
2 to 12
-5 to 50
PP None -5 to 80
Submersion (PH8HS)
Flow-through (PH8HF) PP, SS (*1) None
Provided -5 to 80
Well Bucket (HH350G)
(*2) SS (*1) None
Provided -5 to 80
Float
(PB350G, PB360G) (*2) PP, SS (*1) None -5 to 50
Note: PVC: Rigid Polyvinyl, PP: Polypropylene, SS: Stainless Steel
*1: Stainless steel holder and Stainless steel adapter should be used when the pH value of the solution is pH3 or more acidic.
*2 Cannot be used with pH sensors connected to Variopin connecter.
Temperature detection element: Pt1000
Solution pressure: under atmospheric pressure to 50 kPa, when using a holder,
refer to Table 2.
Table 2. Process Pressure Range
Holder Process Pressure Range
Submersion Atmospheric pressure (Submersion depth: Max. 3 m)
Guide-pipe
Suspension Float
Atmospheric pressure
(Submersion depth: Max.3 m)
Flow-through (*1) Atmospheric pressure to 50 kPa
*1: For ow-through types, refer also to the solution temperature and pressure diagram of Holder IM.
Operating solution depth: 3 m water pressure (max.) under atmospheric pressure
Solution ow velocity: 2 m/s max.
Solution ow rate: 3 to 11 L/min
(when the sensor is installed in a ow-through type holder).
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IM 12B7K1-02E
  <1.Specication> 1-2
Solution conductivity 50 µS/cm or higher
Wetted part materials:
Body; Ryton (PPS resin), glass, titanium or Hastelloy C, ceramics, Fluoro rubber (FKM)
or Peruoroelastomer (FFKM)
Cable; Chlorinated polyethylene rubber (Cable sheath)
Weight: Approx. 0.4 kg (Body)
Output Response:
Response time (for 90% response): 10 seconds maximum
(when the sensor, stabilized at 20°C, measures a solution at 20°C).
CAUTION
Select the material of wetted parts with careful consideration of process characteristics. Inappropriate
selection may cause leakage of process fluids, which greatly affects facilities. Considerable care must be
taken particularly in the case of strongly corrosive process fluid such as hydrochloric acid, sulfuric acid,
hydrogen sulfide, and sodium hypochlorite. If you have any questions about the wetted part construction
of the product, be sure to contact Yokogawa.
1.2 Model and Su󰀩x codes
l pH Sensor
Model Su󰀩x Code Option
Code Description
PH8ERP ................................... ................... KCl Rellable Type pH Sensor
Cable Length -03
-05
-07
-10
-15
-20
-NN
...................
...................
...................
...................
...................
...................
...................
3m
5m
7m
10m
15m
20m
No cable (*7)
Solution Ground Tip -TN
-HC
...................
...................
Titanium
Hastelloy C
- -N ................... Always -N
pH Measuring System -T
-E
-F
-B
-G
-V
...................
...................
...................
...................
...................
...................
For PH200/PH400 (*1)
For PH202/FLXA202/FLXA21 (*2)
For FLXA202/FLXA21 (*6)
For PH100 (*3)
For FLXA402, PH450G,PH202/TB (*5)
Variopin connector (*8)
Style *A ................... Style A
Option O-ring /PF Daielperfrow (*4)
*1: Mark band is shown by alphanumeric and fork terminals are used.
*2: Mark band is shown by numeral and pin terminals are used. When terminal box is used, select WTB10-PH1.
*3: The tag which indicated the color, the sign, and the number is attached to the cable of a sensor.
*4: Choose Daielperfrow when this is used in organic solvent, high alkali or high temperature solution.
*5: Mark band is shown by numeral and M3 ring terminals are used. When terminal box is used, select WTB10-PH3.
*6: Mark band is shown by numeral and M4 ring terminals are used. When terminal box is used, select WTB10-PH5.
*7: Select -V for a measuring system.
*8: Select -NN for the cable length. Submersion type or Flow-through type holders can be combined with Variopin connector.
Do not allow the part above the sensor ange to contact with the solution.
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IM 12B7K1-02E
  <1.Specication> 1-3
l Accessories
Model Su󰀩x
Code
Option
Code Description
PH8AX .................. ................... Accessories for pH meter (*1)
Calibration
Reagents
-L
-P
...................
...................
Two bottles, each containing 250mL solution (pH7 and pH4)
24 bags, each bag containing powder for 500mL solution (pH7 X
12 bags and pH4 X 12 bags) and two 500mL polyethylene bottles.
Style *A ................... Style A
Option /STD
/TMP
Sensor stand (with mounting bracket for 50A 2-inch pipe)
Thermometer (0 to 100 °C)
*1: Including the following:
Two 200 mL polyethylene cups
One cleaning bottle
l Consumables
Part Name Part
Number Remarks
Glass electrode General purpose K9142TN One
K9319NA One for /PF option
Junction
General purpose K9142TH One
K9319QA One for /PF option
Teon K9142HW One for /TF option
K9319QB One for /TF /PF option
Bu󰀨er solution for calibration (pH 4) K9084LL Six 250 mL polyethylene bottles
Bu󰀨er solution for calibration (pH 7) K9084LM Six 250 mL polyethylene bottles
Bu󰀨er solution for calibration (pH 9) K9084LN Six 250 mL polyethylene bottles
Powder for bu󰀨er solution (pH 4) K9020XA 12 bags, each for preparation of 500 mL
Powder for bu󰀨er solution (pH 7) K9020XB 12 bags, each for preparation of 500 mL
Powder for bu󰀨er solution (pH 9) K9020XC 12 bags, each for preparation of 500 mL
KCl powder (for PH8ERP) K9142UT 2 bags, 1 bottle of 3.3 mol/L KCl, 1 syringe
Note: The pH value of the calibrating bu󰀨er solution may vary depending on storage conditions.
Prepare a new solution from powder for accurate instrument calibration
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IM 12B7K1-02E
  <1.Specication> 1-4
1.3 External Dimensions
64103
Ø27.5
Ø38
197
For FLXA202, FLXA21
(PH8ERP-��-��-�-F*A)
For FLXA402, PH450, PH202/TB
(PH8ERP-��-��-�-N-G*A)
Ring terminal (-F, -G)
Sensor cable
Unit : mm
For PH202, FLXA202, FLXA21
(PH8ERP-��-��-N-E*A)
For PH200, PH400
(PH8ERP-��-��-N-T*A)
For PH100
(PH8ERP-��-��-N-B*A)
Cable length (Standard: 3m, 5m, 7m, 10m 15m, 20m)
Fork terminal (-T, -B)
Pin terminal (-E)
Variopin connecter
(PH8ERP-NN-��-N-V*A)
Figure 1.1 PH8ERP Rellable type pH Sensor
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IM 12B7K1-02E
< 2. Installation > 2-1
2. Installation
2.1 Preparation for Installation
2.1.1 Unpacking and Inspection
The Model PH8ERP pH sensor is packed at the factory to prevent damage during transportation.
Upon receipt of the sensor, unpack the shipping container and then visually inspect it for damage.
Check the instrument nameplate on the sensor body to make sure that you received the correct
sensor.
NOTE
Do not attempt to remove the liquid junction (see Figure 2.2 below), Otherwise, the sensor
internal solution will leak out. To prevent the liquid junction and glass electrode from being dried
out, place the protective cap covering the top of the sensor in its original position until the sensor
is installed.
Made in Japan
No.
PH8ERP -
MODEL
F2.1.ai
03-TN-N-T*A
Figure 2.1 An Example of Model Number Entering to Nameplate
F2.2.ai
Glass Electrode
Liquid Junction
Solution Ground tip
Sensor Body
Figure 2.2 Names of PH8ERP pH Sensor Components
2.1.2 Installing Holder
Usually, the pH sensor is suspended in a guide pipe or installed in a ow-through or submersion
holder. First install the holder.
2.1.3 Installing Associated Instruments
Make sure that the associated instrument (a pH transmitter/converter or a junction terminal box)
to which the pH sensor cable is connected has already been installed.
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< 2. Installation >
2-2
IM 12B7K1-02E
< 2. Installation > 2-2
2.2 Requirements for mounting the pH sensor
2.2.1 In case of installing the PH8HG Guide-pipe Holder
To install the sensor in the guide pipe, proceed as follows:
(1) Connect the sensor cable to the associated instrument correctly by referring to Section 2.3
provided later.
(2) Attach the "stopper" supplied with the guide pipe to the sensor cable.
Fix the sensor cable so that the sensor tip projects 20 to 30 mm out from the pipe end when
the pH sensor is suspended in the guide pipe as shown in Figure 2.3.
NOTE
If the sensor tip does not project out from the pipe end, the measured value may not respond
promptly to the pH variations of the measured solution. This may cause problems for pH
measurement and control. On the other hand, if the sensor tip projects too far from the pipe end,
the force on the sensor may damage the sensor cable from scraping it against the pipe.
Sensor Cable
Sensor Cable
pH Sensor
Arm Pipe
Guide Pipe
Cable Clamp
Attaching "Stopper"
Stopper
20 to 30 mm
2-inch (60.5 mm O.D)
Mounting Pipe
Figure 2.3 Mounting Sensor in Guide Pipe
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IM 12B7K1-02E
< 2. Installation > 2-3
2.2.2 Installing Sensor in PH8HS Submersion Holder
To install the sensor in the submersion holder, proceed as follows:
(1) Pass the sensor cable through the sensor holder. If the submersion holder remains installed,
remove the sensor holder in any case.
For a pipe-mounting submersion holder without a cleaner, loosen the sensor holder nut to
remove the holder.
F2.4.ai
Right-angled Pipe Clamp
Sensor Holder
Sensor Holder
Sensor Holder Nut
Arm Pipe
Removal of Sensor Holder (Arm Pipe used with option /MS1 or /MS2)
Removal of Sensor Holder (Stainless Bracket used with option /MS3 or /MS4)
Bracket
Nut
Figure 2.4 Removal of Sensor Holder (for Pipe Mounting Sensor without Cleaner)
For a ange mounting submersion holder without a cleaner, remove the sensor holder by
loosening the two bolts securing the sensor holder to the ange (see Figure 2.5).
F2.5.ai
Flange
Fixing Bolt
Figure 2.5 Removal of Sensor Holder (for Flange Mounting Sensor without Cleaners)
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< 2. Installation >
2-4
IM 12B7K1-02E
< 2. Installation > 2-4
F2.6.ai
Clamp (Screw)
Cleaner Holder
Sensor Holder
Figure 2.6 Removal of Sensor Holder (with Cleaner)
To install the sensor cable in the sensor holder, rst remove the protector screwed onto the
sensor holder end and then remove the protective foam piece (for shipping; thus, it is not
necessary after the sensor is installed in the holder). Pass the sensor cable through the
O-ring then attach the O-ring to the sensor ange (see Figure 2.7).
When passing the sensor cable through the holder, if the inside of the holder is dirty or wet,
take special care to keep the cable dry by covering the sensor cable end with a polyethylene
bag or the like. Pull out the sensor cable and KCI solution supply tube downward through
the holes of Waterproof Cap.(see Figure 2.7)
For details to install the sensor onto a holder, refer to relevant User’s Manuals.
When Variopin connecter is attached to a sensor, conncect the sensor to SSA and WU11 cable
rst, then insert the sensor into the holder pipe. For further information on sensor connection,
read IM 1206S01-00EN-(P), IM 1206S01-01Z1-(P).
CAUTION
DO NOT hold the lower part of the sensor when screwing it into a Variopin connecter. Otherwise
the excessive force may damage the sensor.
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IM 12B7K1-02E
< 2. Installation > 2-5
Waterproof Cap Cover
Waterproof Cap
Sensor Holder Pipe
Sensor Cable
Pull out the sensor cable
Sensor Body
O-ring
Flange
Protector
Sponge
(Remove)
Insert the sensor and cable
Figure 2.7 Installing the Sensor Cable
(2) Connect the sensor cable to the associated instrument correctly by referring to Section 2.3.
(3) Screw the protector to x the sensor to the holder. In this case, remove the protective cap
and secure the protector so that the ange of the sensor compresses the O-ring rmly.
about the installation method.
11th Edition : Dec.14,2018-00

< 2. Installation >
2-6
IM 12B7K1-02E
< 2. Installation > 2-6
F2.8.ai
Protector
O-ring
pH Sensor
Figure 2.8 Installing Sensor in Submersion Holder
(4) Close the waterproof cap, and attach the holder to the arm pipe, ange or cleaner holder
completely.
2.2.3 Installing Sensor in PH8HF Flow-through Holder
To install the sensor in a ow-through holder, proceed as follows:
(1) Connect the sensor cable to the associated instrument. First, remove the sensor xing nut
and pass the sensor cable through the nut.
pH Sensor
Sensor Fixing Nut
Figure 2.9 Preparation for Sensor Cable Connection
Properly connect the sensor cable by referring to Section 2.3.
(2) Connect the pH sensor to its holder. Remove the protective cap from the sensor. Also
remove the protective foam piece (for shipping - this is not necessary after installing the
sensor) from the holder. Be sure that the liquid junction and glass electrode are mounted
properly. Insert the sensor tip into the holder and tighten the sensor xing nut securely (see
Figure 2.10).
When Variopin connecter is attached to a sensor, conncect the sensor to SSA and WU11 cable
rst, then insert the sensor into the holder pipe. For further information on sensor connection,
read IM 12A01F01-02EN.
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IM 12B7K1-02E
< 2. Installation > 2-7
CAUTION
DO NOT hold the lower part of the sensor when screwing it into a Variopin connecter. Otherwise
the excessive force may damage the sensor.
F2.10.ai
Fixing Nut
pH Sensor
O-ring
Flow-through Holder 2-inch Mounting Pipe
Figure 2.10 Installing Sensor in Flow-through Holder
How to install the HH350G, PB350G, and PB360G holders, refer to relevant IMs.
2.3 pH Sensor Cable Wiring Procedure
2.3.1 Connecting Sensor Cable to Terminal Box
(1) Open the cable inlet hole in terminal box using the supplied punch tool. The location of
the cable inlet hole is shown by the circle-shaped groove under the case. The end of the
supplied punch tool is put in the center of this circle and it is tapped with appropriate force.
You can punch out the hole along the groove.
11th Edition : Dec.14,2018-00

< 2. Installation >
2-8
IM 12B7K1-02E
< 2. Installation > 2-8
F2.11.ai
Hole punching tool for wiring
(supplied as accessory)
Figure 2.11 How to punch out the wiring hole
(2) Loosen two screws which are at front of terminal box and detach the cover.
(3) After detaching the nut from the cable gland of sensor cable, pull the cable into the terminal
box from sensor cable inlet hole.
Connect the sensor cable to the terminals.
After passing the cable through the nut, check the symbol on each core wire, then connect
each core wire to the corresponding terminal.
CONVERTER
SENSOR
F2.12.ai
Figure 2.12 Connecting Sensor Cable (In case of the PH8TBG)
(4) Mount the cable gland in the cable inlet hole.
Put the nut in place, and screw it onto the main body su󰀩ciently. At this time, loosen the cap
so that the cable is not twisted. After xing the main body, tighten the cap to keep moisture
out of the equipment. However if the cap is screwed up too tight, the cable will be damaged.
11th Edition : Dec.14,2018-00

IM 12B7K1-02E
< 2. Installation > 2-9
F2.13.ai
Attach the nut in the
direction shown here
(so that it engages
the detent groove).
Nut
Gasket
Main unit
Cap
Figure 2.13 Cable Gland
(5) After completing the cable connections, replace the box cover securely, thus preventing
moisture from getting into the case.
11th Edition : Dec.14,2018-00