YOKOGAWA WE430 User manual

User’s
Manual Model WE430
Hydrazine Analyzer
IM 12Y18A03-01EN
IM 12Y18A03-01EN
1st Edition

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IM 12Y18A03-01EN 1st Edition : Oct. 04, 2019-00
uIntroduction
Thank you for purchasing the WE430 Hydrazine Analyzer.
This Instructor’s Manual contains all essential information for the user to make full use of WE430.
Please read the following respective documents before installing and using the WE430.
The related documents are listed as follows.
General Specications
Contents Document number Note
Model WE430 Hydrazine Analyzer GS 12Y18A03-01EN Online manual
“EN” in the document number is the language code.
User’s Manual
Contents Document number Note
WE410, WE420, WE430, WE440
WET CHEMISTRY ANALYZER
Safety Precautions and Protection of Environment
IM 12Y18A00-01EN Attached to the product
(printed manual)
Model WE430 Hydrazine Analyzer IM 12Y18A03-01EN Online manual (This manual)
“EN” in the document number is the language code.
An exclusive User’s Manual might be attached to the products whose su󰀩x codes or option
codes contain the code “Z” (made to customers’ specications). Please read it along with this
manual.
You can download the latest documents from our website. Scan QR code.
http://www.yokogawa.com/an/WE400/download/
Media No. IM 12Y18A03-01EN 1st Edition : Oct. 2019 (YK)
All Rights Reserved Copyright © 2019, Yokogawa Electric Corporation

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IM 12Y18A03-01EN 1st Edition : Oct. 04, 2019-00
n Notes on Handling User’s Manuals
• Please provide the user’s manuals to your end users so that they can keep the user’s
manuals 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 Drawing Conventions
Some drawings may be partially emphasized, simplied, or omitted, for the convenience of
description.
Some screen images depicted in the user’s manual may have di󰀨erent display positions or
character types (e.g., the upper / lower case). Also note that some of the images contained in this
user’s manual are display examples.
n Trademark Acknowledgments
• 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.

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u Safety Precautions
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.
This symbol indicates Protective Ground Terminal.
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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u CE marking products
n Authorized Representative in EEA
The Authorized Representative for this product in EEA is Yokogawa Europe B.V. (Euroweg 2,
3825 HD Amersfoort, The Netherlands).
n Identication Tag
This manual and the identication tag attached on packing box are essential parts of the product.
Keep them together in a safe place for future reference.
n Users
This product is designed to be used by a person with specialized knowledge.
n How to dispose the batteries:
This is an explanation about the EU Battery Directive. This directive is only valid in the EU.
Batteries are included in this product. Batteries incorporated into this product cannot be removed
by yourself. Dispose them together with this product.
When you dispose this product in the EU, contact your local Yokogawa Europe B.V.o󰀩ce.
Do not dispose them as domestic household waste.
Battery type: Manganese dioxide lithium battery
Notice: The symbol (see above) means they shall be sorted out and collected as ordained in the
EU Battery Directive.

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Model WE430
Hydrazine Analyzer
CONTENTS
IM 12Y18A03-01EN 1st Edition
uIntroduction....................................................................................................i
u Safety Precautions ......................................................................................iii
u CE marking products..................................................................................iv
1. General Information ................................................................................. 1-1
1.1 Principles of Operation .................................................................................... 1-2
1.2 Principles of Calibration................................................................................... 1-4
1.2.1 Dynamic Two Point Calibration (DYN)............................................... 1-4
1.2.2 O󰀪ine Calibration .............................................................................. 1-4
1.3 Fluidics Diagram ............................................................................................... 1-5
1.4 Glossary............................................................................................................. 1-5
2. Analyzer Preparation ............................................................................... 2-1
2.1 Mounting and Plumbing Instructions............................................................. 2-1
2.2 Electrical Wiring................................................................................................ 2-3
2.3 Wiring the Analyzer........................................................................................... 2-4
2.3.1 Terminal Assignments........................................................................ 2-6
2.3.2 Electrode Wiring Assignments........................................................... 2-6
2.4 Installation of Reagent and Di󰀨usion Tubing ................................................ 2-6
2.5 Installation of New Electrode Cables.............................................................. 2-7
2.6 Installation of a New Iodide Electrode ............................................................ 2-7
2.7 Installation of ATC Probe ................................................................................. 2-8
2.8 Installation of a New Reference Electrode ..................................................... 2-9
3. Analyzer Operation .................................................................................. 3-1
3.1 Use of the Setup Mode ..................................................................................... 3-3
3.2 Setup Mode Overview ...................................................................................... 3-4
3.3 Shutdown and Start-Up Procedure............................................................... 3-25
4. Calibration................................................................................................. 4-1
4.1 Calibration Setup .............................................................................................. 4-1
4.2 Dynamic Calibrator Operation......................................................................... 4-2
4.3 Dynamic Calibrator and Syringe Setup.......................................................... 4-3
4.4 Performing a DYN Calibration ......................................................................... 4-3
4.5 Calibration Error Codes ................................................................................... 4-5
4.6 Calibration At Custom Concentrations Using DYN ...................................... 4-6
4.7 Dynamic Calibrator Check ............................................................................... 4-7

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4.8 O󰀪ine Calibration Procedure.......................................................................... 4-7
5. Analyzer Maintenance ............................................................................. 5-1
5.1 Maintenance Schedule..................................................................................... 5-1
5.2 Weekly Maintenance......................................................................................... 5-1
5.3 Bi-Weekly Maintenance.................................................................................... 5-1
5.4 Monthly Maintenance ....................................................................................... 5-2
5.4.1 Calibration.......................................................................................... 5-2
5.4.2 Replacement of Sample Inlet Filter.................................................... 5-2
5.4.3 Polish Iodide Electrode ...................................................................... 5-2
5.4.4 Air Pump Check ................................................................................. 5-2
5.4.5 Replacement of Reagent and Di󰀨usion Tubing Assembly ................ 5-2
5.5 Yearly Preventive Maintenance ....................................................................... 5-4
5.5.1 Electrodes .......................................................................................... 5-4
5.5.2 O-ring Replacement........................................................................... 5-4
5.5.3 Replacement of Restrictor Tubing ..................................................... 5-4
6. Troubleshooting ....................................................................................... 6-1
6.1 Diagnostics Mode ............................................................................................. 6-1
6.1.1 Calibration Log................................................................................... 6-1
6.1.2 Error List............................................................................................. 6-2
6.1.3 Measurement Log.............................................................................. 6-2
6.1.4 Status Log .......................................................................................... 6-3
6.1.5 Software Revision.............................................................................. 6-3
6.1.6 Electronics Serial Number ................................................................. 6-3
6.1.7 mV and Noise Measurements ........................................................... 6-3
6.1.8 mA Output Values .............................................................................. 6-3
6.1.9 Display Test........................................................................................ 6-3
6.1.10 Keypad Test ....................................................................................... 6-4
6.2 Slope Problems................................................................................................. 6-5
6.2.1 Low Slope .......................................................................................... 6-5
6.2.2 High Slope.......................................................................................... 6-5
6.2.3 Troubleshooting Matrix ...................................................................... 6-6
6.3 Error/Event Codes ............................................................................................ 6-7
6.4 Resetting the Analyzer ..................................................................................... 6-9
6.4.1 Hard Reset....................................................................................... 6-10
6.4.2 Serial Number and Software Revision............................................. 6-10
Revision Record.......................................................................................................i

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1. General Information
This user guide covers the operation, maintenance and troubleshooting for the WE430 Hydrazine
analyzer, which o󰀨ers unmatched reliability in analyzing oxygen scavengers in feedwater, boiler
water or at the economizer inlet.
nIntroduction
Analyzer the oxygen scavenger content at points in the steam/water circuit where dissolved
oxygen control is critical. Residual oxygen scavengers must be carefully monitored to prevent
costly overdosing, yet allow enough of the reductant in the system for metal passivation.
Excess levels of certain oxygen scavengers decompose into ammonia, which increases system
alkalinity. E󰀩cient control of oxygen scavengers depends on maintaining a predetermined safety
zone. The WE430 Hydrazine analyzer optimizes the uidic design with the sensing technology
to provide accurate and precise results with an almost instantaneous indication of oxygen
scavenger concentration changes.
The WE430 Hydrazine analyzer meets all of the criteria for accurate and dependable oxygen
scavenger monitoring and more. The WE430 analyzer incorporates innovative technologies that
include:
• Premium electrodes
• Marquee help screen
• Pump-less reagent addition and dynamic calibration system
l Markets
• Power
• Pulp and paper
• Chemical / petrochemical
l Applications
• Boiler water
• Feedwater
• Hydrazine
• Carbohydrazide
• DEHA and others
n Features and Benets
The WE430 Hydrazine analyzer is ideal for measuring and monitoring the critical oxygen
scavenger levels in feedwater, boiler water or economizer inlet. With limited maintenance
requirements and low reagent usage, the WE430 analyzer provides the highest level of
performance with easy of use.
• Measurement of oxygen scavenger concentrations in water using premium ion selective
electrode (ISE) technology.
• Accurate and precise measurements in the range of 0 ppb to 200 ppb for hydrazine:
• Reliable measurements and a wide measurement range with selectable resolution.
• Measures oxygen scavenger activity in aqueous solutions quickly, accurately and
economically.
• Premium reference and sensing electrodes:
• Superior accuracy and stability over a wide temperature range.
• Advanced ow cell design:
• Automatic sample handling and contamination control with no moving parts.
• Patented scrolling marquee:
• Intuitive menu-driven, digital user interface.
• Data log of previous measurements and calibration:
• View measurement, calibration and error history.

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• Self diagnostics:
• Ease of maintainability.
• Password protection:
• Security and peace of mind for your operation.
• Auto-ranging electronics with an easy to read backlit LCD display:
• Analyzer determines the best range.
n Application Modes
The versatility of the WE430 Hydrazine analyzer allows the operator to set the analyzer to read
hydrazine, depending on the oxygen scavenger to be measured. Refer to Section 3.1, Use of the
Setup Mode for instructions on how to set the analyzer to read hydrazine.
lHydrazine Application
Hydrazine Measuring Range: 0 ppb to 200 ppb as hydrazine
In high pressure boiler systems, hydrazine is added to react with dissolved oxygen present in the
system and a small amount of residual hydrazine is left behind. The residual hydrazine ensures
that small amounts of dissolved oxygen that enters the system through leakage will be removed.
Residual hydrazine should be carefully monitored to prevent costly overdosing.
Excess hydrazine may also decompose into ammonia, which increases sample alkalinity and
attacks copper alloy components. E󰀩cient control of hydrazine depends on maintaining a
predetermined safety zone – typically 10 to 50 ppb.
1.1 Principles of Operation
The sample enters the WE430 Hydrazine analyzer and passes through the inlet valve, bypass/
needle valve, inlet lter, pressure regulator, ow meter and into the restrictor tubing. The sample
then passes through the uid connector block into a reagent bottle and through a di󰀨usion tubing
assembly where pH adjustment takes place and iodine is added. The pH-adjusted sample then
ows back through the connector block into the reagent mixing loop where the oxygen scavenger
in the sample mixes with iodine reagent to form iodide. The sample then passes the iodide
electrode, reference electrode and temperature probe and ows into an atmospheric drain via the
diverter valve.

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Figure 1.1 WE430 Schematic
The oxygen scavenger present in the sample reacts with the iodine to form iodide ion:
OSred + X • I2 → 2X • I-+ OSox
Where:
OSred = oxygen scavenger reduced
OSox = oxygen scavenger oxidized
The iodide sensing electrode responds logarithmically to changes in the resulting iodide ion
concentration. This response is described by the Nernst equation:
E = Eo+ 2.3 (RT/nF) log (C/Ciso)
Where:
E = measured electrode potential, mV
Eo= potential, when C equals Ciso, mV
R = ideal gas constant
T = temperature of sample, degrees K
n = valence of ionic species (-1 for iodide ion)
F = Faraday’s constant
C = e󰀨ective iodide concentration (activity)
Ciso= concentration (activity) of iodide ion where potential E is temperature independent
(isopotential point)
E0default: 44 mV
Low limit of E0: - 50 mV
High limit of E0: + 150 mV
Slope default: - 64.0 mV/decade
Slope range: - 75.0 mV/decade to - 40.0 mV/decade

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The above equation indicates that the measured potential varies with both temperature and
the concentration of the ion of the interest. In order to eliminate error caused by uctuations in
sample temperature, the WE430 microprocessor constantly updates temperature corrections
from data supplied by the ATC probe.
From the Nernst equation, the theoretical response of a iodide ion selective electrode to a ten-
fold change in concentration at 25 °C is -59.16 mV. This is referred to as the electrode slope (S).
Most electrodes, however, do not exhibit a theoretical slope. Therefore, the analyzer is calibrated
to determine its actual value. Two standards are used to provide information necessary for the
microprocessor to compute the actual slope and E0for use during sample analysis.
Acid is added to the sample to prevent a competing reaction from occurring:
3I2+ H2O → 5I-+ IO3-+ 6H+
Maintaining acidic conditions prevents the release of iodide which would cause high apparent
reductant readings.
The pH adjustment and iodine addition are accomplished by the patented passive-di󰀨usion
process wherein the sample passes through a length of tubing in the reagent bottle that contains
the acid reagent and iodine. The reagent and iodine di󰀨use through the tube wall and mix with
the sample. This passive method eliminates sample contamination problems due to reagent
contamination and makes the uid handling apparatus simple and reliable.
1.2 Principles of Calibration
Calibration procedures for analytical instruments are important and must be performed carefully.
The WE430 Hydrazine analyzer uses a dynamic two point calibration that utilizes advanced
electrode technology in combination with a dynamic calibrator.
1.2.1 Dynamic Two Point Calibration (DYN)
The dynamic two point calibration procedure provides maximum calibration accuracy and
requires the use of the dynamic calibrator. In addition to calculating the Eovalue of the electrode,
as is done in an o󰀪ine calibration procedure, this procedure determines electrode slope. To
perform a dynamic two point calibration, the WE430 analyzer is rst connected to a reductant-
free sample stream. An appropriate diluted standard is prepared and then a syringe is lled
with the diluted standard and mounted on the calibrator. The calibrator is then mounted near
the analyzer and the syringe tubing is connected to the standard injection port. By adjusting the
calibrator pump settings, two di󰀨erent ow rates produce two known standards that are diluted
into the sample background. By pressing the appropriate keys on the analyzer when prompted,
the analyzer’s microprocessor completes the calibration. After allowing approximately 30 minutes
for the calibration solution to be ushed from the system, the WE430 analyzer can begin sample
measurement again.
1.2.2 O󰀪ine Calibration
In addition to a dynamic two point calibration, an o󰀪ine calibration can be performed with
some oxygen scavengers. Since the oxygen scavenger concentration in feedwater is normally
controlled over a rather narrow range, usually an o󰀪ine calibration procedure is su󰀩cient to
provide accurate results. The o󰀪ine calibration procedure has the advantage of being quick and
easy to perform. If sample reductant concentrations are expected to vary widely from day to day
or if online verication of analyzer readings is desired, a dynamic two point calibration should be
performed.
The o󰀪ine calibration feature of the WE430 analyzer allows the operator to adjust the analyzer to
values determined by alternate methods used in their laboratory such as a standard colorimetric
method.

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The o󰀪ine calibration is essentially a one point calibration. To perform an o󰀪ine calibration, a
sample is taken from the bypass of the analyzer; the sample concentration value is stored in
memory; the sample is analyzed by an alternate method of choice; the previously stored reading
is adjusted to the lab method result; and the analyzer is then returned to the analysis mode. The
term “o󰀪ine calibration” refers only to the fact that a sample from WE430 analyzer bypass is
taken “o󰀪ine” for laboratory analysis; in fact, no downtime is experienced during the procedure
and the analyzer remains online throughout.
1.3 Fluidics Diagram
Figure 1.2 Fluidics Diagram
1.4 Glossary
Refer to Figure 1.2.
Inlet Valve
Accepts the sample stream via 1/4 inch NPTF connector. The operator must supply the
sample with a pressure between 8 and 100 psig.
Inlet Filter
60 micron stainless steel lter traps particulate matter in the sample stream.
Bypass/Needle Valve
Used to redirect ow in the bypass system.

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Pressure Regulator
Adjusts ow of the incoming sample stream.
Flow Valve
Used to turn o󰀨 ow to the ow cell.
Flow Meter
Measures the sample ow rate.
Restrictor Tube Assembly
Used in conjunction with the pressure regulator to maintain a steady sample ow rate.
Fluid Connector Block
Connects the reagent bottle to the sample stream and ow cell assembly.
Di󰀨usion Tubing Assembly
Semi-permeable tubing through which the reagent and iodine di󰀨use into the sample.
Reagent Bottle
Contains the iodine solution and acid reagent that adjusts the sample pH.
Thumbscrew
Supports the reagent bottle.
Reagent Bottle Clamp
Holds the reagent bottle securely in place.
Reagent Mixing Loop
Mixes the iodine reagent with the oxygen scavenger in the sample to form iodide, which is
measured by the iodide sensing electrode.
Flow Cell
Contains the iodide sensing electrode, reference electrode and ATC probe.
Iodide Electrode
Senses iodide ions in the sample stream and produces an electrical potential dependent on
the oxygen scavenger concentration.
Reference Electrode
Provides a constant reference potential and completes the measurement circuit.
Pressurized Reference Electrode Filling Solution Bottle
Provides a constant ow of electrolyte solution through the reference electrode for
maximum stability.
Check Valve
Prevents the backow of electrolyte from the pressurized reservoir.
ATC Probe
Measures the sample temperature and inputs the data to the microprocessor for automatic
temperature compensation (ATC).
Standard Injection Port
Allows the connection of the dynamic calibrator tubing to the uid connector block during a
dynamic two point calibration.
Air Pump
Provides air to pressurize the lling solution bottle.
LCD Display
Provides digital readouts of concentration, temperature, millivolts and error codes.
Keypad
Consists of ve mode keys, four prompt indicator lights, two scroll keys and one key for
entering data. Mode and error indicators are also incorporated on keypad.
Status Indicator
Two LED lights that illuminate according to current status of the analyzer.
Green Light: Indicates that system is in correct working condition.
Yellow Light: Indicates a warning, system in hold or that maintenance is required.
Red Light: Indicates that something is seriously wrong.
NOTE
When either the yellow or red LED is lit, there may be an entry in the diagnostics mode that
indicates the error. The logging feature must be initiated in the setup mode. Refer to Section 3.1,
Use of the Setup Mode for instructions.

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2. Analyzer Preparation
WARNING
The instructions provided in this userguide are recommendations from the manufacturer to
ensure safe and correct operation of the analyzer. If the analyzer is not used as recommended by
the manufacturer this can lead to incorrect operation or injury.
n Unpacking the Analyzer
YOKOGAWA analyzers are assembled, tested and packaged with great care.
1. Open the outer box. Remove the top four foam corner support pieces.
2. Open the inner box. This box should contain the analyzer and accessories. (Refer to IM
12Y18A00-01EN)
3. Remove the cardboard retaining shell by sliding it over the entire mounting board and the
analyzer.
4. Carefully remove the entire mounting board with analyzer from the inner box.
NOTE
Do not lift or pull the analyzer by the uidics or the electronic components.
Use the back panel to lift the analyzer system.
5. Unbolt the analyzer from the mounting board by removing the four mounting bolts with a
9/16’’ wrench. These bolts may be discarded.
6. Carefully place the analyzer at a convenient location until proper installation can be
completed.
2.1 Mounting and Plumbing Instructions
WARNING
Do not connect power prior to the mounting and plumbing of the analyzer.

<2. Analyzer Preparation> 2-2
IM 12Y18A03-01EN 1st Edition : Oct. 04, 2019-00
711
(28)
628.7
(24.75)
472 (18.6) 218 (8.6)
Mounting holes 4-ø12.7 (0.5)
Unit: mm (inch)
177.8 (7.0) 44 (1.75)
17
(0.68)
Figure 2.1 Mounting Dimensions
NOTE
• Select a site for the analyzer that allows it to be permanently bolted with ample height for
atmospheric drain operation. Be sure that there is ready access to the electronic controls,
calibration port and electrodes.
• A clearance of 15 inch (about 40 cm) must be allowed above the ow cell calibration port.
Insert the pipet vertically (not angled) during the calibration.
• The analyzer location must permit connections to a sample line, drain and AC power supply
and any connections for output devices.
• The analyzer should be mounted as close to the sampling point as possible. This ensures
the fastest possible response to a changing sample condition. Refer to the Appendix,
Sample Conditions section.
• For proper ow cell operation, the analyzer must be installed straight and level upon its
mounting location. Failure to level the analyzer may cause poor siphoning in the ow cell.
n Instructions
1. Prepare the mounting holes. Carefully lift the analyzer and bolt it into place. Do not lift the
analyzer by holding on to any of the plumbing or uid handling components.
2. Connect a waste line to the outlet of the analyzer, which is 3⁄4’’ NPT male. The waste
line should be connected to a drain of su󰀩cient capacity, 0.5 inch (1.27 cm) OD is
recommended.
3. Connect a sample line to the inlet of the analyzer, which is 1⁄4’’ NPT female. It is
recommended that a shuto󰀨 valve be installed at the sampling point.
4. The analyzer must be mounted and leveled vertically for proper operation.

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n Sample Requirements
Additional information is listed in the Appendix, Specications section.
Sample inlet connection
1/4” NPTF. If particulate matter is present in the sample, pre-ltration is necessary. The
60 micron stainless steel lter located after inlet valve will remove moderate amounts of
particulates.
Flow rate
40 mL/minute (nominal).
Pressure
8 to 100 psig.
Temperature
Temperature must be between 5 and 45°C.
Oxygen scavenger level
Oxygen scavenger levels are read directly in ppb or ppm, when calibrated with standard.
Sample alkalinity
Sample alkalinity should be less than 50 ppm CaCO3equivalent.
2.2 Electrical Wiring
The warning icon highlights important information that should be strictly followed when using the
analyzer for your own safety. Failure to follow these instructions may result in injuries.
WARNING
Read and observe the following safety recommendations.
n Safety Requirements
• Prior to wiring, a switch or circuit breaker for disconnecting the analyzer from power supply
should be installed.
• The switch should be in close proximity to the analyzer and with easy reach of the
user.
• The switch should be marked as the disconnecting device for the analyzer.
• To reduce the risk of shock hazard, disconnect the power prior to opening the analyzer.
• Before connecting the analyzer to the main, make sure that the voltage lies within either
range: 100-120V 200mA / 200-240V 100mA; 50/60 Hz AC.
• Cutting o󰀨 the power by disconnecting power source will not reset the analyzer. This
analyzer incorporates a non-volatile memory and will maintain calibration and settings after
power failure. Battery power is supplied to the display for the date and time functions.
• If a repair is required, or to arrange Return Material Authorization, call Response Center or
contact your local authorized dealer.
• Installation and wiring of the analyzer may only be carried out in accordance with applicable
local and national codes per this user guide.
• Be sure to observe the technical specications and input ratings.
n Warning Labels and Locations
WARNING
The following section provides important information that should be strictly followed when using
the analyzer for your own safety. Failure to follow these instructions may result in injuries.

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The safety warning icons are used in two locations on the analyzer.
• Faceplate – Refer to Figure 2.2.
Figure 2.2 Faceplate
• Power supply – Refer to Figure 2.3.
Figure 2.3 Power Supply
NOTE
Replace the fuse only with a fuse of same rating.
2.3 Wiring the Analyzer
WARNING
Read and observe the following requirements. If you install the wrong fuse for your system, you
could damage the analyzer. Make sure that you select the correct fuse rating and discard the
additional fuses supplied in the fuse kit.
n Required Tools
• Options kit – includes fuses, cable glands, conduit tting and green screw terminal.
• Phillips head screwdriver.
• 2 mm blade at-head screwdriver.

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Power Cable
Hole Locations
Cable Glands
Electrode Cables
4 Captive Screws
Hinge Pin
Figure 2.4 Electronics Enclosure with Cable Glands
1. Open the faceplate – loosen the four screws using a Phillips head screwdriver. The
electronics faceplate will open via the hinge pin connection.
2. Remove one or two of the two unused cable glands as required for wiring power cable or
auxiliary connections. Power cable optional hole locations are shown in Figure 2.4.
3. Select and install the appropriate size cable gland or conduit tting as required.
4. Feed the power cable through the conduit or cable glands as required.
Terminal connector
Figure 2.5 Terminal Connector Location
5. Wire the power cable to the green screw terminal connector from the options kit. Select
correct terminal for hot conductor depending on line voltage, insert ground wire into the
correct terminal and connect the other cable to the neutral terminal. Refer to Figure 2.5 for
terminal connector location.
6. Plug the terminal connector into the power supply. Refer to Figure 2.3.
7. The universal power supply uses both fuses in the fuse kit. Install by inserting the fuse in the
fuse holder and secure it using the twist and lock method. The fuses are clearly labeled with
the appropriate voltages for your system. Refer to Figure 2.3 and Figure 2.5 for the correct
fuse holder positions. Refer to the table below for fuses required.
AC Voltage Fuse Rating
115V 200mA, 250V, Fast Acting
230V 100mA, 250V Fast Acting

<2. Analyzer Preparation> 2-6
IM 12Y18A03-01EN 1st Edition : Oct. 04, 2019-00
2.3.1 Terminal Assignments
Terminal Layout Terminal Layout Terminal Layout Terminal Layout
1mA1 output 9Relay 1 26 Sensing electrode 28 Do not connect
2GND common ground 10 Relay 1 27 Do not connect 29 Do not connect
3mA2 output 11 Relay 2 30 Preamp power
4Air pump (ISE only) 12 Relay 2 31 Preamp ground
5Air pump (ISE only) 13 Relay 3 32 Shield
6Shield ground for
conductivity
14 Relay 3 33 Shield
7Do not connect 15 Do not connect 34 Jumper to pin 26
when using preamp
8Do not connect 16 Temperature ground
17 Temperature drive
18 Temperature sense
19 Solution ground
20 Conductivity drive +
21 Conductivity sense +
22 Conductivity sense -
23 Conductivity drive -
24 Reference electrode
25 Jumper to pin 24
when using preamp
9 10 11 12 13 14 15 16 17
1 2 3 4 5 6 7 8 28 29 30 31 32 33 34
26 27
18 19 20 21 22 23 24 25
Figure 2.6 Terminal Assignments
2.3.2 Electrode Wiring Assignments
Iodide Electrode
26 Sensing electrode Connect clear wire
33 Shield Connect black wire
Reference Electrode
24 Reference electrode Connect clear wire
32 Shield Connect black wire
2.4 Installation of Reagent and Di󰀨usion Tubing
WARNING
The reagent is hazardous. Use protective glasses and gloves. Refer to the bottle label for
precautions and work in a fume hood or well-ventilated area. Avoid contact with skin or clothes. In
case of skin contact, ush skin immediately with water to prevent burns.

<2. Analyzer Preparation> 2-7
IM 12Y18A03-01EN 1st Edition : Oct. 04, 2019-00
1. Support the bottom of the reagent bottle and release the holding clamp with one hand. Turn
the thumbscrew counterclockwise to release the reagent bottle. Unscrew the white bottle
cap and gray tubing connector assembly. The bottle that is supplied with the analyzer can
be used as a spare.
2. Take a new bottle of the reagent (Cat. No. 181811) to a well ventilated area, such as a
laboratory fume hood. Unscrew and remove the white cap on the bottle.
3. Connect the di󰀨usion tubing (Cat. No. 181860) to the tubing connector assembly. Place the
tubing assembly and cap into the bottle.
4. Replace the gray cap and screw the white cap on tightly.
5. Insert the four nipples on the top of the reagent bottle into the uid connector block.
6. Support the bottom of the reagent bottle with one hand and tighten the thumbscrew
clockwise.
7. Clamp the bottle to the uidics panel to secure it.
Figure 2.7 Reagent Bottle Assembly
2.5 Installation of New Electrode Cables
1. Unpack the electrode cables.
2. Feed the tinned wires through the cable gland assemblies with the holes (2 or 1).
3. Follow the terminal assignments shown in Figure 2.6 for the proper electrode cable wiring
location.
2.6 Installation of a New Iodide Electrode
The Iodide electrode (Part number: K9705CG) must be used in conjunction with the reference
electrode (Part number: K9705CH).
1. Unpack the iodide electrode (Part number: K9705CG) and carefully remove the protective
cap. Save the cap for future storage of the electrode. Use the electrode polishing strip to
gently polish the sensing surface of the iodide electrode for about 30 seconds.
2. Insert the Iodide electrode into its port in the ow cell cap. Refer to Figure 2.8 for the
location. Installation in the incorrect hole will cause calibration issues.
3. Plug the electrode cable marked “Sensing” into the top of the electrode. Be sure to
push back the black cap to verify a secure connection between the male and female pin
connection prior to tightening.
4. Tighten the screw cap connection to the cable.