USF Wallace & Tiernan DEPOLOX 4 User Manual

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DEPOLOX 4

®

BA - 40 004 E

MICROPROCESSOR BASED

ANALYSING AND CONTROL

SYSTEM FOR CHLORINE,

pH AND REDOX IN POTABLE

WATER AND SWIMMING POOLS

Wallace & Tiernan GmbH

D-89305 Günzburg

Telefon (08221) 904-0

Telefax (08221) 904-203

e-mail: wtger@chemfeed.org

www.wallace-tiernan.de

Table of Contents

Questions and Answers:

E
erik27Aug 2, 2025
How to fix insufficient sensitivity in USF Wallace & Tiernan Measuring Instruments?
- E
  Elizabeth KingAug 2, 2025
  If your USF Wallace & Tiernan Measuring Instruments show insufficient sensitivity, several factors could be the cause. First, check the water flow and remove any contaminants in the sample water line or measuring cell, and clean the strainer. Also, contaminated electrodes can cause this issue, so ensure you clean them. If the grit color has changed to yellow or brown, replace the grit. Finally, an excessive pH-value can also lead to insufficient sensitivity; in this case, adjust the pH-valve.
J
jferrellAug 11, 2025
What to do if the indicated value oscillates considerably at constant chlorine concentration in USF Wallace & Tiernan Measuring Instruments?
- N
  Nicole PriceAug 11, 2025
  If the indicated value oscillates considerably at a constant chlorine concentration in your USF Wallace & Tiernan Measuring Instruments, several issues could be responsible. Check the water pressure for considerable fluctuations. Fluctuating pH-values can also cause this, so clean the pH electrodes. Additionally, inspect the inlet to the cell body or flow regulator for clogs and clean if necessary. A defective diaphragm can also cause oscillations, so consider replacing it. Finally, air bubbles can cause this issue, so install a vent line.

USF Wallace & Tiernan DEPOLOX 4 Specifications

General

Model	DEPOLOX 4
Manufacturer	USF Wallace & Tiernan
Category	Measuring Instruments
Measurement Type	Chlorine Dioxide
Output	4-20 mA
Power Supply	24 VDC
Operating Temperature	0-50°C
Weight	1.5 kg
Display	LCD
Dimensions	144 x 144 x 144 mm

Summary

DEPOLOX 4 INSTALLATION AND OPERATION THEORY

INSTALLATION OF CHLORINE RESIDUAL ANALYSER

Step-by-step installation of the complete chlorine residual analyser.

THEORY OF OPERATION

Explains the 3-electrode system, potentiostatic control, and current measurement.

INSTALLATION GUIDELINES

LOCATION OF INSTALLATION

Recommendations for choosing the installation location.

SAMPLE WATER TAKE-OFF PROCEDURE

Proper methods for taking sample water, including hose and pipe selection.

STARTUP PROCEDURES

DEPOLOX 4 ANALYZER (PRESSURELESS TYPE) STARTUP

Step-by-step startup for the pressureless type analyzer.

DEPOLOX 4 ANALYZER (PRESSURE TYPE) STARTUP

Step-by-step startup for the pressure type analyzer.

AMPLIFIER FOR CHLORINE MEASURING CELL STARTUP

Initial startup procedure for the amplifier module.

CALIBRATION OF DEPOLOX 4 AMPLIFIER

CALIBRATION OF MEASUREMENT RANGE

How to program and set the measurement range for the amplifier.

CALIBRATION OF BIAS VOLTAGE

Procedure for calibrating the bias voltage of the amplifier.

ZERO CALIBRATION PROCEDURE

Steps to perform zero point calibration for the amplifier.

MEASURED VALUE CALIBRATION PROCEDURE

How to calibrate the amplifier using measured values from a DPD method.

SYSTEM MAINTENANCE

ZERO POINT AND MEASURED VALUE CHECK

Periodic checks of the zero point and measured values.

TROUBLESHOOTING GUIDE

pH-VALUE ANALYSER SYSTEM

pH-PROBE WITH SPECIAL CABLE DETAILS

Details of the pH probe, its membrane, electrolyte, and connector.

pH-VALUE ANALYSER START-UP PROCEDURE

Step-by-step procedure for starting up the pH-value analyser.

pH PROBE MAINTENANCE

Cleaning and maintenance procedures for the pH probe.

REDOX ANALYSER SYSTEM

REDOX PROBE WITH SPECIAL CABLE DETAILS

Details of the Redox probe, its membrane, electrolyte, and connector.

REDOX ANALYSER START-UP PROCEDURE

Procedure for starting up the Redox analyser.

REDOX PROBE MAINTENANCE

Cleaning and maintenance procedures for the Redox probe.

AMPLIFIER SYSTEM OVERVIEW

AMPLIFIER INSTALLATION

How to mount the basic unit and plug-in amplifiers.

ELECTRICAL INSTALLATION PROCEDURES

Details on connecting the mains power supply and wiring the amplifier modules.

PARAMETER AND FUNCTION MENUS OPERATION

How to navigate and change settings in parameter and function menus.

BASIC AMPLIFIER CONFIGURATION

CHLORINE MEASUREMENT AMPLIFIER

PARAMETER MENUS (STANDARD CL2 AMPLIFIER)

FUNCTION MENUS (CL2 AMPLIFIER)

INITIAL OPERATION PARAMETER SET-UP

pH MEASUREMENT AMPLIFIER

PARAMETER MENU (STANDARD pH AMPLIFIER)

FUNCTION MENU (pH-AMPLIFIER)

INITIAL OPERATION CONTROL PARAMETER SET-UP

REDOX MEASUREMENT AMPLIFIER

PARAMETER MENU (STANDARD REDOX AMPLIFIER)

FUNCTION MENU (REDOX-AMPLIFIER)

ERROR MESSAGES AND CAUSES

INTEGRAL CONTROLLER OPTION

THREE-STEP CONTROLLER FOR SERVOMOTOR

METERING PUMP CONTROLLER (PULSE DURATION)

SOLENOID PUMP CONTROLLER (PULSE FREQUENCY)

CONTROLLER WITH CONTINUOUS OUTPUT

CONTROL PARAMETERS INFLUENCE ON CONTROL LOOP

CHLORINE AMPLIFIER ADAPTATION

USE OF THE ADAPTATION PROCESS

PRECONDITIONS FOR ADAPTATION

ADAPTATION MENUS AND SETTINGS

SEQUENCE OF THE ADAPTATION PROCESS

ENDING THE ADAPTATION SEQUENCE

ENDING ADAPTATION WITHOUT ERROR

ENDING ADAPTATION WITH ERROR

DETERMINING CONTROLLER PARAMETERS (Tu AND Ts)