Gas detection probes certified with ATEX, 4- 20mA, for control units P81 and P82
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DESCRIPTION
General features0
Combustible gas detection probes, certified with ATEX II 2G Ex d IIC T6, to be used with the electronic control units P81 and P82.
The probes are available in 3 versions: S84 for methane gas and city gas, S85 for LPG and S86 for carbon monoxide.
- Sensor type: catalytic, standard.
- Measurement range 0…100% LEL.
- Sensor precision ± 5% of the probe scale, ± 10% of reading.
- Precision (semiconductor) ± 10% of full scale (the calibration point).
- Repeatability ± 5% of full scale, ± 10% of reading.
- Measurement resolution 1% LEL.
- Digital processing of Kalman filter measurement.
- Preheating time < 2m.
- Stabilization time < 2m.
- Maximum response time < 20s (T50), < 60s (T90).
- Average life time of the sensor in air 255 weeks.
- Environment temperatures:
– operating -20 ÷ 50 °C;
– storage -20 ÷ 70 °C. - Environment humidity without condensation:
– operating 15 ÷ 90 %UR;
– storage 45 ÷ 75 %UR. - Operating pressure (KPa) 80 ÷ 110.
- Air speed (m/s): ± 6.
- Optical signals – red LED visible on the powered probe.
- Dimensions: 164 x 100 x 82 mm.
- Unit weight 0.8 Kg.
Electric features- Power supply: 11 ÷ 28 Vdc.
- Absorption: maximum 3.2 W.
Output logic 4…20mA:
- proportional logic 4mA = 0% LEL; 0 ppm
(default) 20mA = 100% LEL; 500 ppm - absorption logic 0mA = no alarm
(applications with 1 or 2 thresholds) 10mA = 1st threshold alarm – 20mA = 2nd threshold alarm - reference selection
of the signal 4…20mA to 1/2 of jumpers with reference to power supply negative or positive signs
4…20mA output load resistance up to 200Ω at 12Vdc power supply and up to 200Ω¸ 700Ω at 24Vdc power supply
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ADVANTAGES
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Combustible gas detection probes, certified with ATEX II 2G Ex d IIC T6, to be used with the electronic control units P81 and P82.
The probes are available in 3 versions: S84 for methane gas and city gas, S85 for LPG and S86 for carbon monoxide.
Advantages -
TECHNICAL SPECIFICATION
CODE GAS TYPE OPERATING AMBIENT TEMPERATURE PROTECTION DEGREE S84 Methane gas, or other light gases - 10 ÷ 50 °C IP65 S85 LPG gas (cylinder liquid gas) or other heavy gases - 10 ÷ 50 °C IP65 S86 CO carbon monoxide - 10 ÷ 50 °C IP65 -
HOMOLOGATION AND INSTALLATION
Homologation
- Complies with the directives/norms EMC 89/336/CEE, norm EN 50270.
- Certified with ATEX II 2G Ex d IIC T6.
Installation and use- Sensor installation must be done in accordance with EN 60079-14 standard. As cable entry use the cable gland nipple of 1“ NPT certified with ATEX and complies with the standards EN 60079-0 and EN 60079-1 (Ex d protection type).
- The sensor must be connected to earth through the appropriate system (provided).
- S84-85-86 probes are used to detect the presence of methane gas, LPG, carbon monoxide (CO), gasoline fumes and upon request, acetylene, hydrogen, ammonia, propane, octane and ethyl alcohol in areas classified in industrial environments and heating plants.
- S84-85-86 probes shall be provided for a stand-alone operation with 4 … 20mA output, and optionally, with no 4 relay outputs with voltage free changeover contacts, respectively for:
– previous warning (pre-alarm),
– 1st alarm threshold,
– 2nd alarm threshold,
– faulty sensor. - In case of gas leak the probe compares the value of the measured concentration with the intervention thresholds, set by activating the relays associated with them. The information about the value of the measured concentration is always present on the output 4 …20mA.
ACCESSORIES
- 1590080: 4-relay board
- S80: Emergency signaling device with fixed light and continuous sound.
- TECHNICAL LITERATURE
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FAQS
