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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