Waltron 9072 User manual

101-054-A.1
EXPERTS IN WATER CHEMISTRY SINCE 1903
9072 Hydrazine Analyzer
User Manual

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Waltron User Manual 101-054-A.1
9072 Hydrazine Analyzer
WALTRON CUSTOMER COMMITMENT
This instruction manual is a technical guide to aid the customer in the set-up, operation,
and maintenance of their new Waltron measuring system. Waltron provides continuous
product improvement and reserves the right to make any modifications to the information
contained herein without notice.
Copyright © Waltron Bull & Roberts, LLC, 2019
All Rights Reserved
Technical questions concerning this product should be addressed to:
Waltron Technical Service Department
Flemington, New Jersey
Phone: [phone]
Fax: [phone]
www.waltron.net
Please be ready to provide the following information:
Date analyzer was purchased
Analyzer model and serial number
Recent maintenance history
Calibration slope values and detailed description of problem
Waltron’s technical expertise and extensive experience provides personalized solutions to
the water quality industry. It is Waltron’s commitment to provide the customer with
timely and accurate technical service and support.
Waltron fully expects the customer to be satisfied with the quality, performance, and cost
of this product.
If there are any questions or concerns regarding this product, please feel free to contact
Waltron at (908)-534-5100.
Thank you for choosing Waltron!
Please note the Waltron mailing and shipping address:
Waltron Bull & Roberts, LLC
25 Minneakoning Road, Suite 101
Flemington, NJ 08822

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Waltron User Manual 101-054-A.1
9072 Hydrazine Analyzer
SAFETY
Please observe proper safety and handling precautions when installing, operating,
maintaining, and servicing this product. The following should be noted and adhered to:
Read and understand manual before working with analyzer.
Pay special attention to warning labels on enclosures, containers, packages and
chemicals.
Only qualified personnel should be involved in the installation, operation, and
servicing of the analyzer.
Follow safety precautions when operating analyzer in conditions of high pressure
and/or temperature.
Keep analyzer chemicals away from heat and extreme temperatures. Reagent
powders must be kept dry.
Follow all regulations and warning labels when disposing of chemicals. Do not
mix chemicals.
To obtain analyzer safety information or Safety Data Sheets (SDS), please contact
Waltron or logon to www.waltron.net.

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Waltron User Manual 101-054-A.1
9072 Hydrazine Analyzer
WARRANTY AGREEMENT
If, within one year from the date of shipment, the customer experiences any equipment
defects or is not satisfied with the analyzer manufacturing, Waltron will repair, or at its
option, replace any defective part(s) free of charge. This warranty requires that the
defective part(s) be returned to Waltron with shipping charges prepaid.
At Waltron discretion, a Technical Service Specialist may be sent out to repair or replace
the defective part(s) on location. Traveling time and expenses of the Technical Service
Specialist is at the customer’s expense.
Equipment sent to Waltron must be appropriately packaged and the following
information must be provided prior to returning to Waltron:
The Return Authorization (RA) number assigned to the customer by the Waltron
Technical Service Department
Customer name, address and department
Name and telephone number of the individual responsible for returning items for
repair
Brief problem description
Ship to Waltron service center:
Waltron Bull & Roberts, LLC
25 Minneakoning Road, Suite 101
Flemington, NJ 08822
The Waltron Warranty Agreement:
Covers expendable sensors for one month after shipment and reusable electrodes
for six months after shipment.
Does not apply to damages occurred during shipping.
Warranty will be nullified if goods have been used for purposes other than those
for which they are intended or if any seal has been removed, broken or tampered
with or if the Waltron trademark or serial number has be removed, defaced, or
altered.
Does not cover expendable supply items such as reagents, tubing and
electrolytes.
Does not cover misuse or mistreatment by the user.
Does not cover previous repair or alteration by unauthorized individuals.
Waltron does not assume responsibility for contingent liability through alleged failure or
failures of products or product accessories.

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Waltron User Manual 101-054-A.1
9072 Hydrazine Analyzer
CHECKLIST OF MATERIALS
In order to ensure customer satisfaction, Waltron does its best to provide
adequate and timely packaging and shipping services. Please perform the
following after receiving a shipment:
Inspect all shipping containers upon receipt and record any visible damage. If
there are any outward signs of damage, please retain all containers and packages
for inspection by carrier. Please retain all packing material so that it can be used
for future moving and shipping needs.
Check all items received against those on the packing list. Chemicals are usually
shipped in a separate package and will be itemized accordingly.
Verify that the number of packages received agrees with the packing list and
shipping papers.
Notify both Waltron and the carrier if any problems occur.
Important Notice:
All analyzers are inspected and tested prior to shipment.
In normal use, the unit should require only minor maintenance and should
operate correctly and without fault over a long period of time.
Please note that if electronic components need to be replaced, it may be
necessary to adjust and/or calibrate the analyzer.
Failure to carry out correct maintenance procedures may result in inaccurate
analyzer readings.

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Waltron User Manual 101-054-A.1
9072 Hydrazine Analyzer
Table of Contents
1 INTRODUCTION..................................................................................................... 6
1.1 AREAS OF APPLICATION.............................................................................. 6
1.2 DESCRIPTION OF DEVICE............................................................................. 7
1.3 THE MEASURING SYSTEM........................................................................... 8
1.4 BLOCK DIAGRAM OF SENSOR SYSTEM.................................................... 9
2 INSTALLATION.................................................................................................... 10
2.1 DELIVERED PARTS....................................................................................... 10
2.2 ACCESSORIES................................................................................................ 14
2.3 TERMINAL SCHEMATIC.............................................................................. 14
2.4 TECHNICAL DATA........................................................................................ 15
3 OPERATING PROCEDURES.............................................................................. 16
3.1 PRINCIPLES OF MEASREMENT ................................................................. 16
4 START-UP............................................................................................................... 16
4.1 MENU STRUCTURE ...................................................................................... 16
4.2 PREPARING TO MEASURE.......................................................................... 18
4.3 CHOICE OF OPERATING PARAMETERS .................................................. 18
5 MEASURING MODE............................................................................................ 20
5.1 OPERATING CONDITIONS .......................................................................... 20
5.2 ANALYZER CALIBRATION......................................................................... 20
6 MAINTENANCE.................................................................................................... 22
6.1 CLEANING OF ELECTRODES ..................................................................... 22
6.2 CLEANING OF CELLS................................................................................... 22
7 TROUBLESHOOTING......................................................................................... 23
8 SPARE PARTS AND ACCESSORIES ................................................................ 24

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Waltron User Manual 101-054-A.1
9072 Hydrazine Analyzer
INTRODUCTION
1INTRODUCTION
1.1 AREAS OF APPLICATION
The Waltron 9072 Hydrazine Analyzer is used for the automatic, continuous
measurement and control of hydrazine concentration in aqueous solutions. Examples of
the applications of the unit include the determination of residual hydrazine concentration
in boiler feedwater in power plants, the monitoring of hydrazine concentration in the
primary loop of a nuclear power plant, the monitoring of hydrazine concentration during,
or the indication of the hydrazine concentration during the reduction of oxygen in water
treatment plants etc.
Hydrazine is used as a reducing agent and oxygen scavenger in fossil fueled boiler
systems, generally in AVT (All Volatile Treatment) process streams. The hydrazine
creates a reducing environment to protect copper containing metallurgy and serves to
reduce the dissolved oxygen concentrations to protect iron containing metallurgy.
Hydrazine concentration needs to be continuously monitored to provide feedback to the
chemical injection systems and to ensure that the correct concentrations are present in the
system.
In the primary loop of a nuclear power plant the hydrazine should reduce or mitigate the
oxygen which is produced by radiolysis. As a result the electro-chemical corrosion
potential (ECP) of the tube material is reduced. In nuclear power plant applications,
hydrazine is added to scavenge oxygen or recombine with the oxygen that is produce by
radiolysis. In the pressurized water reactor (PWR) primary loop, hydrazine is measured
in the range 25-50cc/kg. Hydrazine in boiling water reactors (BWR) feedwater and
reactor coolant is measured in ppm’s. Hydrazine in feedwater is typically 0-2ppm and
hydrazine in reactor coolant water will vary between 0.1-0.5ppm.
For boilers that operate with a pressure higher than 62 bar (900 psi), hydrazine is often dosed
to scavenge oxygen. Hydrazine (N2H4) reacts with oxygen as follows:
N2H4 + O2 => H2O + N2

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Waltron User Manual 101-054-A.1
9072 Hydrazine Analyzer
INTRODUCTION
1.2 DESCRIPTION OF DEVICE
The Waltron 9072 Hydrazine Analyzer measures reliably and quickly the hydrazine
concentration in aqueous media from the trace areas (<10.0 µg/l) up to concentrations of
higher than 1000 µg/l under normal conditions.
The Waltron 9072 Hydrazine Analyzer can be divided into two primary function parts.
The first is the electronic component which consists of the display and input elements as
well as the measuring data collection and data processing elements.
The second is the analytical component which is composed of the inlet valve, filter
device and flow meter which serve the sample and probe preparation. The measuring cell
is joined with the temperature sensor and the reference cell with its reference electrode.
For the measurement of the hydrazine (N2H4), the sample flows through the components of
the device which relate to the sample and probe preparation and through the calibration cell
into the coaxial measurement cell (grooved measurement cell), passing by the gold
measuring electrode. If the measuring electrode has the characteristic potential for the
hydrazine oxidation in the boundary layer (interphase) between the electrode surface and
medium, the measurement reaction takes place.
Waltron 9072 Hydrazine Analyzer

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Waltron User Manual 101-054-A.1
9072 Hydrazine Analyzer
INTRODUCTION
1.3 THE MEASURING SYSTEM

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Waltron User Manual 101-054-A.1
9072 Hydrazine Analyzer
INTRODUCTION
1.4 BLOCK DIAGRAM OF SENSOR SYSTEM