YOKOGAWA OR8ERG Series User manual

User’s
Manual
Model OR8ERG
KCl Rellable type ORP Sensor
IM 12C04K01-01E
IM 12C04K01-01E
7th Edition

IM 12C04K01-01E
<INTRODUCTION> i
INTRODUCTION
This manual covers the OR8ERG KCl Rellable type ORP Sensor.
Other related items are described in the following manuals.
Model Title IM No.
PH8HG Guide-pipe Holder 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
PH202G, S 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
OR8TBG Terminal Box IM 12C04W01-01E
OR8AX Accessories for ORP Meter IM 12C04W02-01E
Media No. IM 12C04K01-01E 7th Edition : Feb. 2020 (YK)
All Rights Reserved Copyright © 1996, Yokogawa Electric Corporation
7th Edition : Feb.20,2020-00

IM 12C04K01-01E
<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.
7th Edition : Feb.20,2020-00

IM 12C04K01-01E
<INTRODUCTION> iii
 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.
7th Edition : Feb.20,2020-00

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IM 12C04K01-01E
<CONTENTS> v
Model OR8ERG
KCl Rellable type ORP Sensor
CONTENTS
IM 12C04K01-01E 7th Edition
INTRODUCTION.............................................................................................i
 For the safe use of this equipment.............................................................ii
 After-sales Warranty ...................................................................................iii
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 ........................................................................................ 1-3
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 ORP 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 ORP 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 ORP Transmitter .................. 2-8
2.3.3 Connecting Sensor Cable to Four-wire ORP Converter ................... 2-9
3. Maintenance on operation....................................................................... 3-1
3.1 Operation and Periodic Maintenance ............................................................. 3-1
3.1.1 Calibrating ORP Sensor Using Checking Solutions .......................... 3-1
3.1.2 Cleaning Indicator 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 Liquid Junction .................................................................. 3-3
3.2.2 Replacing O-rings for Indicator Electrode .......................................... 3-4
Customer Maintenance Parts List.......................................CMPL12C03K01-01E
Revision Information ...............................................................................................i
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  <1.Specication> 1-1
IM 12C04K01-01E
1. Specication
The Model OR8ERG KCl Rellable ORP 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.
1.1 Standard Specications
Measurement: Oxidation-reduction potential of a solution
Measurement principle: Metallic electrode method
Measuring range: -1500 to 1500 mV
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., ammonia, chlorine, hydrogen sulde, 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)
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) SS (*1) None, Provided -5 to 80
Float
(PB350G, PB360G) 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.
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 Atmospheric pressure to 50 kPa
Note： 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).
Wetted part materials:
Body; Ryton (PPS resin), platinum-glass or gold-epoxy resin, titanium, ceramics, Fluoro rubber (FKM)
Cable; Chlorinated polyethylene rubber (Cable sheath)
Weight: Approx. 0.4 kg (Body)
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.
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IM 12C04K01-01E
  <1.Specication> 1-2
1.2 Model and Su󰀩x codes
l ORP Sensor
Model Su󰀩x Code Option Code Description
OR8ERG ...................................... ...................... KCl Rellable Type ORP Sensor
Electrode -AU
-PT
.....................
.....................
Gold
Platinum
Cable Length -03
-05
-07
-10
-15
-20
.....................
.....................
.....................
.....................
.....................
.....................
3 m
5 m
7 m
10 m
15 m
20 m
Measuring System -N
-E
-F
-B
-G
.....................
.....................
.....................
.....................
.....................
For OR200, OR400 (*1)
For FLXA402, PH202, FLXA202, FLXA21 (*2)
For FLXA202, FLXA21 (*3)
For OR100 (*4)
For FLXA402, PH450G, PH202/TB (*5)
Style *A ..................... Style A
*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: Mark band is shown by numeral and M4 ring terminals are used. When terminal box is used, select WTB10-PH5.
*4: The tag which indicated the color, the sign, and the number is attached to the cable of a sensor.
*5: Mark band is shown by numeral and M3 ring terminals are used. When terminal box is used, select WTB10-PH3.
l Accessories
Model Su󰀩x Code Option Code Description
OR8AX .................... ..................... Accessories for ORP meter (*1)
Style *A ..................... Style A
Option /STD
/KCLL
/KCLP
/TMP
Sensor stand (with mounting bracket for 2-inch pipe)
KCl solution (one 250 mL polyethylene bottle)
KCl powder (three bags, 250 mL solution each)
Thermometer (0 to 100°C)
*1: Including the following:
Two 200 mL polyethylene cups
One cleaning bottle
One pack of quinhydrone reagent powder (three bags, 250 mL solution each)
One 250 mL polyethylene bottle
l Consumables
Part Name Part Number Remarks
Indicator
electrode
Platinum K9142TS One for OR8ERG, OR8EFG
Gold K9142TT One for OR8ERG, OR8EFG
Junction K9142TH One for OR8ERG, OR8EFG
KCl solution (3.3mol/L) K9084LP Six 250 mL polyethylene bottles
KCl powder (for OR8ERG) K9020UT 2 bags, 1 bottle of 3.3mol/L KCl, 1 syringe
Reagent for
check
Quinhydrone K9024EC 3 bags, each for preparation of 250mL
Iron K9024ED 3 bags, each for preparation of 250mL
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  <1.Specication> 1-3
IM 12C04K01-01E
1.3 External Dimensions
Cable length: L
64
103
Ø27.5
Ø38
("-B", "-N": Fork terminal) ("-E": Pin terminal)
F1.1.eps
Unit: mm
Terminal No. and colors
GE
RE
SE
G
15 (Red)
13 (Brown)
14 (Black)
16 (Green)
Cable gland is not included.
Reuse existing gland, or replace.
("-G", "-F": Ring terminal)
Model and codes L (mm) Weight (kg)
OR8ERG -  - 03 - *A Approx. 3000 Approx. 0.4
OR8ERG -  - 05 - *A Approx. 5000 Approx. 0.6
OR8ERG -  - 07 - *A Approx. 7000 Approx. 0.7
OR8ERG -  - 10 - *A Approx. 10000 Approx. 1.0
OR8ERG -  - 15 - *A Approx. 15000 Approx. 1.4
OR8ERG -  - 20 - *A Approx. 20000 Approx. 1.8
15 13 14 16 15 13 14 16
GE RE SE G
Figure 1.1 OR8ERG Rellable type ORP Sensor
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IM 12C04K01-01E
< 2. Installation > 2-1
2. Installation
2.1 Preparation for Installation
2.1.1 Unpacking and Inspection
The Model OR8ERG ORP 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. Also check the instrument nameplate on the sensor cable 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. Do not let the liquid junction and indicator electrode dry out. To
prevent this, place the protective cap covering the top of the sensor in its original position until the
sensor is installed.
Made in Japan
No.
OR8ERG -
MODEL
F2.1.ai
PT- 03 - N*A
Figure 2.1 An Example of Model Number Entering to Nameplate
F2.2.ai
Indicator Electrode
Liquid Junction
Grounding Electrode
Sensor Body
Figure 2.2 Names of OR8ERG ORP Sensor Components
2.1.2 Installing Holder
Usually, the ORP 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 ORP transmitter/converter or a junction terminal
box) to which the ORP Sensor cable is connected has already been installed.
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IM 12C04K01-01E
< 2. Installation > 2-2
2.2 Requirements for mounting the ORP 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 ORP 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 ORP variations of the measured solution. This may cause problems for ORP
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
ORP 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 12C04K01-01E
< 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)
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IM 12C04K01-01E
< 2. Installation > 2-4
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)
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.
For details to install the sensor onto a holder, refer to relevant IMs.
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IM 12C04K01-01E
< 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.
7th Edition : Feb.20,2020-00

IM 12C04K01-01E
< 2. Installation > 2-6
F2.8.ai
Protector
O-ring
ORP 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.
ORP 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 ORP 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 indicator electrode are mounted
properly. Insert the sensor tip into the holder and tighten the sensor xing nut securely (see
Figure 2.10).
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IM 12C04K01-01E
< 2. Installation > 2-7
F2.10.ai
Fixing Nut
ORP Sensor
O-ring
Flow-through Holder 2-inch Mounting Pipe
Figure 2.10 Installing Sensor in Flow-through Holder
2.3 ORP 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.
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.
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IM 12C04K01-01E
< 2. Installation > 2-8
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 OR8TBG)
(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.
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.
2.3.2 Connecting Sensor Cable to Two-wire ORP Transmitter
To connect the sensor cable to the two-wire ORP transmitter, proceed as follows:
(1) Loosen the four screws that tighten the transmitter cover. Then remove the transmitter
cover.
(2) Connect the sensor cables to the relevant terminals of the transmitter:
First, remove the nut from the cable gland. Insert the cable into the right opening for the
wiring. Then pass the cable through the nut, Connect the individual cable conductors to the
relevant terminals correctly by referring to the markings on the individual conductors.
For details, refer to relevant transmitter IMs.
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IM 12C04K01-01E
< 2. Installation > 2-9
Sensor cable
Figure 2.14 Connecting Sensor Cable to Two-wire ORP Transmitter
(3) Install the cable gland in the wiring hole as follows:
Pass the tip of the cable gland into the opening and completely tighten the gland with the nut
inside the case.
After tightening the gland, secure the cap properly to prevent moisture from getting into the
case.
Caution: Do not overly tighten the cap. Otherwise, the cable may be damaged.
(4) After completing the cable connections, replace the transmitter cover securely, thus
preventing moisture from getting into the case.
2.3.3 Connecting Sensor Cable to Four-wire ORP Converter
To connect the sensor cable to a Four-wire ORP converter, proceed as follows:
(1) Loosen the four screws that tighten the converter cover. Then open the converter cover.
(2) Connect the sensor cables to the relevant terminals of the converter:
First, remove the nut from the cable gland. Insert the cable into the right opening for the
wiring. Then pass the cable through the nut, Connect the individual cable conductors to the
relevant terminals correctly by referring to the markings on the individual conductors.
For details, refer to relevant converter IMs.
7th Edition : Feb.20,2020-00