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Dräger Regard 3910 - User Manual

Dräger Regard 3910
52 pages
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REGARD
®
3900
Instructions for use
REGARD
®
3900

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Questions and Answers

  • A
    Ashley CastilloSep 23, 2025
    What does a calibration failure message on my Dräger Controller mean?
    • K
      Kara MartinezSep 23, 2025
      If you see a calibration failure message on the screen of your Dräger Controller, it indicates a potential fault with the remote sensor transmitter. Check and repair the transmitter wiring and recalibrate.
  • E
    eflowersAug 23, 2025
    What to do if I am unable to transfer configuration to or from the Dräger Controller?
    • J
      Joseph SmithAug 23, 2025
      If you're unable to transfer the configuration to or from the Dräger Controller, this could be due to a lack of power supply to the controller or a fault with the interface unit (RS-232). You should check and repair the external supply and wiring. If the issue persists, check and repair or replace the interface unit.
  • L
    Lee WebsterAug 25, 2025
    Why is the Fault (F) LED illuminated for a single channel on my Dräger Controller?
    • O
      Omar JamesAug 26, 2025
      If the Fault (F) LED is illuminated for a single channel on your Dräger Controller, it could be due to a transmitter wiring fault, incorrect loop current, a faulty transmitter, or a faulty input module. To resolve this: * Check and repair the transmitter wiring. * Recalibrate the loop current if it's incorrect. * Replace the transmitter if it's faulty. * Replace the input module if necessary.
  • C
    christopherandersonAug 26, 2025
    What to do if Dräger Controller display screen shows: Under-range?
    • S
      Sydney CarrAug 26, 2025
      If the display screen of your Dräger Controller shows 'Under-range', it could be due to a faulty transmitter connection, incorrect loop current, or a faulty transmitter. You should check and repair the transmitter wiring. If the wiring is correct, recalibrate the loop current. If the problem persists, replace the transmitter.
  • C
    Craig LittleAug 27, 2025
    What to do if Dräger Controller display screen shows: Over-range?
    • R
      Robert RichardAug 27, 2025
      If the display screen on your Dräger Controller displays 'Over-range', the issue likely stems from a short-circuit in the remote sensor transmitter wiring or a fault with the remote sensor transmitter itself. To fix this, you should check and repair the transmitter wiring. If the wiring is not the issue, check and repair the transmitter.
  • M
    Matthew MayoSep 18, 2025
    What to do if there is water ingress in my Dräger Controller?
    • N
      Nathan PhillipsSep 18, 2025
      If there is water ingress in your Dräger Controller, it is probably due to a faulty seal. You should check and repair the cover sealing ring, cable entries, and the front cover information label.
  • J
    Jamie JacksonSep 15, 2025
    What to do if the LED and display screen test fails on my Dräger Controller?
    • S
      scottbutlerSep 15, 2025
      If the LED and display screen test fails on your Dräger Controller, the problem is probably a faulty display board. Replace the display board.
  • B
    Brittany BaileySep 16, 2025
    Why is the output signal too low on my Dräger Controller?
    • S
      Steven CookSep 16, 2025
      If the output signal is too low or will not reach 20 mA on your Dräger Controller, the load resistance may be too high. Reduce the load resistance.
  • J
    Jamie RobinsonSep 6, 2025
    Why is the output constant at 1 ± 0.3 mA on my Dräger Controller?
    • B
      Brian CarterSep 6, 2025
      If the output is constant at 1 ± 0.3 mA on your Dräger Controller, it could be due to no signal from the input modules or a faulty output module. Check and connect or repair the ribbon cable. If the issue persists, replace the output module.
  • U
    ugarciaSep 3, 2025
    Why is the Power DC / LED not illuminated but the display screen is on on my Dräger Controller?
    • S
      Sheena MartinSep 4, 2025
      If the Power DC / LED is not illuminated, but the display screen is on for your Dräger Controller, the issue might be a controller supply fault or a faulty display board. Check and repair the external or internal 24 Vdc supply. If the LED still doesn't illuminate, replace the display board.

Summary

Safety-related Information

Product Description

REGARD 3900 Series Features

Overview of the control units, their series components, and primary monitoring capabilities.

System Components

Installation and Commissioning

Mounting and Cable Management

Guidance on unit positioning, mounting, cable entry, and grounding.

Power Supply and Module Installation

Details AC/DC power, module installation, combining, and numbering control modules.

Transmitter and External Connections

Instructions for connecting remote transmitters and other external sources to the system.

Operation Guide

Troubleshooting and Error Resolution

General Fault Diagnosis and Remedies

Lists common faults, causes, and solutions for display and LED issues.

Maintenance and Calibration

Control Unit Configuration and Calibration

Guide to configuring and calibrating the control unit using software or built-in menus.

Technical Specifications

Dräger Regard 3910 Specifications

General IconGeneral
DisplayLCD
Input Voltage24 V DC
WeightApprox. 1.5 kg
Number of sensor inputsUp to 8
Input signal4-20 mA
Power supply24 V DC
TypeGas detection controller
Detection PrincipleElectrochemical, Catalytic, Infrared
Protection RatingIP 65
Operating Temperature-20 to +50 °C
Relay outputs2 relays
Measuring RangesVaries by sensor type
OutputsRelay, 4-20 mA

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