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OLCT 80 Fixed Gas Detection

Brand: Oldham

Features
  • Detectors-Transmitters for Flammable, Toxic Gases and Oxygen
  • Non-intrusive operation via intrinsically safe infrared remote control
  • Remote versions available XP, IS
  • Integrated relays
  • Direct link, 4-20 mA, loop and isolated sensor mode

Specifications

Brand

Accuracy

  • ± 0.05 to ± 20 ppm at Full Scale
  • 0.4 % Volume at Full Scale
  • 1 % LIE between 0 to 60 % LIE at Full Scale
  • 1 % Volume at Full Scale
  • 100 ppm at Full Scale

Alarm

  • 2 Programmable Thresholds Per Channel

Approvals & Certifications

  • ATEX II 2 GD, INERIS 03-ATEX-0240X
  • CE 0080
  • EMC EN 50270, EN 6052
  • EN 50054, 45544 & 50104

Communication

  • Signal Output (Digital): Two Independent Opto-Isolated RS-485 Ports (1,200 Bauds, 38 Kb Modbus ASCII for MX 62)

Display

  • Visualisation: 4-Digit LCD Display for Measurement & One Alphanumeric Line for Texts, Pictograms-Backlighting

Electrical Connectors

  • M20
  • M25

Electrical Contacts

  • RCT Changer-over

Electrical Rating

  • Breaking Capacity: 2 A at 250 Vac
  • Breaking Capacity: 2 A at 30 Vdc

Enclosure, Body Material

  • Aluminum
  • Sensor: 316L Stainless Steel

Environmental Protection

  • IP66

Humidity

  • 10 to 95 % RH, Non-Condensing

Input

  • Two Analog Inputs: 4-20 mA

Load Resistance

  • Input: 120 ohms
  • Relay (On the 4-20 mA): 500 ohms

Loop Resistance

  • Under Central Unit 21 Vdc: 128 ohms (Electrochemical Cell)
  • Under Central Unit 21 Vdc: 16 ohms (IR)
  • Under Central Unit 21 Vdc: 32 ohms (Catalytic/SM)

Measuring Range

  • 0 to 100 % LIE
  • 0 to 100 % Volume
  • 0 to 5,000 ppm

Operating Temperature

  • -20° to 200° C (-4° to 392° F)

Output

  • Analog: 4-20 mA
  • Signal Fault: I < 0.5 mA

Power

  • With Digital Link: 0.2 W, Max.
  • With Digital Link: 1.3 W, Max.
  • With Digital Link: 4.5 W, Max.
  • With I Output & Relays Activated: 2.4 W at 25 mA - Max.
  • With I Output & Relays Activated: 3.5 W at 25 mA - Max.
  • With I Output & Relays Activated: 6.7 W at 25 mA - Max.
  • With I Output: 0.9 W at 25 mA - Max.
  • With I Output: 2 W at 25 mA - Max.
  • With I Output: 5.2 W at 25 mA - Max.

Power Supply

  • Power Supply to Sensor Terminal: 12-28 Vdc (Electrochemical Cell)
  • Power Supply to Sensor Terminal: 16-28 Vdc (Catalytic/IR/SM Cells)

Sensor, Probe Type

  • Sensor: Catalytic
  • Sensor: Electrochemical
  • Sensor: Infrared (IR)
  • Sensor: Semiconductor

Switch Type

  • SPDT

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