USFilter DEPOLOX 3 PLUS

Questions and Answers

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sdeckerAug 4, 2025
What to do if there is insufficient sample water flow in USFilter DEPOLOX 3 PLUS Measuring Instruments?
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  Brian OrtegaAug 4, 2025
  If you're experiencing insufficient sample water flow, several factors could be responsible. First, ensure a 1500mm free fall for the drain hose. Check for and clean any dirt in the cell unit or blockages in the strainer. Make sure the shut-off valve is open and that the regulating valve is functioning correctly; if not, strip and clean it. Also, examine the lines for air bubbles.
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Joshua SullivanAug 9, 2025
Why indicated value oscillates considerably at constant chlorine concentration in USFilter Measuring Instruments?
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  Teresa HallAug 9, 2025
  If the indicated value oscillates considerably at a constant chlorine concentration, it could be due to considerable fluctuations in water pressure. Check the pressure. Another possible cause is fluctuation in pH value; check the pH value. Also, the inlet to the cell body or the flow regulator might be clogged, so clean the inlet or flow regulator. Finally, the flow regulator itself may be defective, so check or replace it.
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Yolanda AcevedoAug 13, 2025
What to do if USFilter DEPOLOX 3 PLUS have air leaks?
- A
  Ashley FranklinAug 14, 2025
  If you notice air leaks, it could be due to faulty o-rings. Try greasing or replacing them. Also, check the pipe connections and repair them as needed. Finally, check the booster and repair it as needed.
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John GrayAug 18, 2025
How to fix unsteady output from electrodes in USFilter DEPOLOX 3 PLUS Measuring Instruments?
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  Brandon DeanAug 19, 2025
  If you're experiencing unsteady output from the electrodes, the membrane may be clogged and needs replacement. Another possibility is air bubbles on the inner surface of the membrane, requiring adjustment.
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Amy RamirezAug 25, 2025
What to do if electrode current is too low in USFilter Measuring Instruments?
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  Jose WebbAug 25, 2025
  If the electrode current is too low, the electrodes may be dirty. Clean them with fine sandpaper and add more grit. Alternatively, the electrodes could be worn and need replacement, or they might be touching and need adjustment.
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Summer CarterAug 29, 2025
Why zero or range is not adjustable in USFilter Measuring Instruments?
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  yhollandAug 29, 2025
  If the zero or range is not adjustable, it might be because the zero current is too high or too low, requiring replacement. Another reason could be that the running-in period is not completed, so wait until it is completed. Also, measure the electrode current in the "Diagnosis" menu. Zero current must be

Summary

Ordering Information and Warranty

Limitation of Buyers Remedies

Defines exclusive remedy for warranty breach, excluding consequential damages.

Introduction to the Depolox 3 Plus Analyzer

Compliance and Intended Use

Electromagnetic Compatibility and Other Requirements

Details conformity with EMC standards and design sectors.

Declaration of Conformity

States compliance with EU directives for machinery, low voltage, and EMC.

Intended Use of the System

Describes the system's purpose: measuring and monitoring disinfectants and pH/fluoride.

Very Important Safety Precautions

Regional Offices

SECTION 1 - TECHNICAL DATA

1.1 DEPOLOX 3 plus Electronics Specifications

Details electronic specifications like power supply, inputs, outputs, and ambient temperature.

1.2 Sensor Feature List Comparison

Compares features of different sensor types (Bare Electrode, FC1, TC1, CD7, OZ7) for various parameters.

1.3 pH Sensor Kit Specifications

Specifies range, temperature, and conductivity for the pH sensor kit.

1.4 Fluoride Sensor Kit Specifications

Details range, pH range, and temperature range for the fluoride sensor kit.

SECTION 2 - INSTALLATION

2.1 DEPOLOX 3 plus Installation Procedures

Covers unpacking, voltage checks, line voltage adjustment, fuse replacement, and module installation.

2.2 Bare Electrode Sensor Kit Installation

Describes installation requirements for the bare electrode sensor kit.

2.3 Membrane Sensor Kit Installation

Details installation of membrane sensors, including flow block assembly.

2.4 pH Sensor Kit Installation

Explains how to install the pH sensor kit.

2.5 Fluoride Sensor Kit Installation

Explains how to install the fluoride sensor kit.

2.6 Flow Switch (Optional) Installation

Describes the connection and rating of the optional flow switch.

2.7 Stop Valve (Optional) Installation

Describes the optional stop valve.

SECTION 3 - OPERATION

3.1 DEPOLOX 3 plus Operation Basics

Covers general description, display, keypad functions, menu selection, and settings.

3.2 Calibration Procedures

Details calibration procedures for Free Chlorine, Membrane, pH, and Fluoride sensors.

3.3 Free Chlorine Sensor Kit Operation

Covers cell start-up, flow regulator adjustment, and theory of operation.

3.4 Membrane Sensor Kits Operation

Details start-up, shut-down, and theory of operation for membrane sensors.

3.5 pH Sensor Kit Operation

Covers the description of the pH sensor kit.

3.6 Fluoride Sensor Kit Operation

Covers description and preparation of the fluoride sensor.

3.7 RS485 Interface Communication

Details the RS485 interface, cable, connection, protocol, and frame description.

SECTION 4 - SERVICE AND MAINTENANCE

4.1 DEPOLOX 3 plus Errors and Troubleshooting

Lists error messages, causes, remedies, and relay/display operations during alarms.

4.2 Free Chlorine Sensor Kit Service

Covers maintenance, troubleshooting, and grit replacement for the bare electrode sensor.

4.3 Membrane Sensor Kit Service

Details maintenance and troubleshooting for membrane sensors and probes.

4.4 pH Sensor Kit Maintenance

Describes cleaning and calibration recommendations for the pH probe.

4.5 Fluoride Sensor Kit Maintenance

Refers to the instruction sheet provided with the fluoride sensor.

SECTION 5 - ILLUSTRATIONS

SECTION 6 - SPARE PARTS LIST

6.1 Free Chlorine Sensor Kit Parts

Lists spare parts and part numbers for the bare electrode sensor kit.

6.2 Membrane Sensor Kit Parts

Lists spare parts and part numbers for membrane sensor kits and cables.

6.3 pH Sensor Kit Parts

Lists spare parts and part numbers for the pH sensor kit.

6.4 Fluoride Sensor Kit Parts

Lists spare parts and part numbers for the fluoride sensor kit.

6.5 Electronics Parts

Lists spare electronic components and their part numbers.