OLCT IR
• Infrared combustible gas monitor
• SIL2 approved, MTBF more than 28 years
• Heated optics, dirty optics compensation, double sources
• Maintenance free ideal for onshore and offshore applications
Offshore platforms, petrochemical and chemical industries, naval installations, waste water treatment plants… in these types of environments, infrared technology is very often the only solution. The OLCT IR is built to withstand these harsh environments, which require the most efficient gas and flame detection.
Proven Leading-Edge Technology
“Zero Maintenance” Efficiency
• The semi-conductor electronics of the OLCT IR guarantee extreme accuracy and constant stability.
• Costs are considerably reduced:
- Lifetime detector stability after initial calibration
- Requires minimal maintenance
The answer to false alarms
• The economic implications of false alarms have led us to design the OLCT IR with the ability to ignore external elements that
trigger false alarms.
Non-intrusive calibration
• Equipped with a non-intrusive system allowing a single operator to access a protected menu.
• The detector can therefore be calibrated in an explosive area in total compliance with safety rules.
Two Confi gurations for Adapting to Your Site
Standalone Version
• Includes a case fitted with a mounting system and a wiring compartment for electrical connections in explosive zones.
• Magnetic system for calibrating in explosive zones without opening the compartment cover.
Free-Fitting Version
• Includes a case fitted with a 3-wire output for connection to any approved junction box.
Unrivaled Performance
Reliability
• Highly resistant to sensor poisoning
• High gas concentration does not saturate the transmitted signal
• All vital functions are maintained even if an accumulation of dust or other substances reduces transmission by 70%.
• Heated mirror and window to prevent misting or icing of the optics
• Operates in an oxygen deficient atmosphere
Durability
• Stainless steel explosion-proof compartment, secure connection compartment
• The mirror is made of quartz
• External optics are made of quartz capable of withstanding high pressure and abrasive substances.
Special Version
• Simultaneously optimizes the response to various hydrocarbons, meeting the requirements for multihazard sites.
Type:
|
OLCT IR |
Detection Principle:
|
Optics: Infrared absorption |
Gases Detected:
|
Hydrocarbons, Methane, propane/butane as standard, CO2, Others on request |
Measuring Range:
|
0-100 % LEL, 0-100% Vol (methane), 0-3% CO2 |
Housing: |
Stainless steel 316L |
Ingress Protection:
|
IP 66 |
Sensitivity:
|
1 % LEL |
Accuracy:
|
+/-1 % LEL CH4 or +/-10 % of the indication (or measurement) at ambiant temperature (-25°C to +55°) |
Response Time:
|
T50 < 7sec |
Selftest:
|
Continuous |
Calibration:
|
In factory or locally for standalone version |
Relative Humidity:
|
0 to 99 % (without condensation) |
Output Signal:
|
4-20 mA |
Max. Load Resistance:
|
300 Ω |
Trouble Signals:
|
Line fault (0 mA)
Optics fault or T° outside limit (1 mA)
Calibration mode (2 mA)
Scale overrun (23 mA) |
Power Supply:
|
15 to 30 VDC at detector terminals |
Power Consumption:
|
< 5W |
Connection:
|
Shielded cable, 3 active wires |
Maximum Resistance per
Conductor of Detector
/ Central unit Cable:
|
8 Ω (0.5 Km of 1.5mm2) under central unit 21 VDC |
Type of Cable Inlet: |
Standalone version OLCT IR-E : cable gland PG9, cable diameter 7 to 11 mm
Free-fitting version : version OLCT IR-M25: permanently secured cable |
Operating Temperature: |
-25°C to +55°C (-13°F to 131°F) |
Storage Temperature:
|
-40°C to +55 °C (-40°F to 131°F) (dry place) |
Weight and Dimensions:
|
Standalone version OLCT IR E: L 212 x H 105 x W 120mm - 3.1 kg
Free-fitting version OLCT IR M25: L177.5 x D 100 - 2.3 kg |
CE Electromagnetic Compatibility:
|
Complies with EN50270 |
CE ATEX Explosive Atmospheres:
|
For the standalone version OLCT IR-E:
- Ex II 2G
- EEx e d ia IIC T4 (T135°C) Tamb -20°C +65°C (-22°F to 149°F)
- INERIS 03ATEX0141X
- Ex II 2GD
- EEx e d ia IIC T4 tamb -30°C+65°C (-22°F to 149°F)
- INERIS 03ATEX0141X
IECEx:
- Ex d e IIC
For free-fitting version OLCT IR-M25:
- Ex II 2GD
- EEx e d IIC T4 (T135°C) Tamb -30°C +70°C (-22°F to 158°F)
- INERIS 03ATEX0141X
IECEx:
- Ex d e ia IIC
|
Oldham OLCT IR Transmitter Documents
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