DURTEX HC
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Detector for explosive gases using catalytic technology Detector for explosive gases using catalytic technology –pellistor-. Available formats: • RS485 addressable 4 wires connection, compatible with EUROSONDELCO & DURGAS, and could be installed in parallel up to 16 detectors in the same loop. • 4-20mA 3 wires connection, compatible with any system provided of 4-20mA inputs. Detection range from 0 to 100% L.E.L. Optical indicators of loop and sensor fault Selecting the gas to be detected by jumper (RS485) Optional programmable alarm relay (4-20mA) and optional output relay (RS485) Resistant to silicone vapours (HDMS) AVAILABLE GASES Methane, natural gas, butane, propane and hydrogen. Appropriated 4-20mA detectors calibration at factory requires prior information about the gas to be detected. DURTEX HC allows the automatic selection of the gas to detect by using a jumper –RS485 detectors- PLACE / HEIGHT OF INSTALLATION In those areas where the gas is accumulated, at 1,5 meters away from gas appliances and avoiding air flows. Coverage area is 16m2 approx. Recommended height of installation: 30 cm. from ceiling: Methane, natural gas, hydrogen 30 cm. from floor: Butane 100 cm. from floor: Propane MAINTENANCE DURTEX HC detectors have been calibrated at factory with target gas therefore do not need to be calibrated at installation again. Check DURTEX HC detectors at least once per year, and follow the instructions of the installation manual for testing and recalibrating operations if required. WARNING Do not use these detectors in presence of hydrogen sulphur, fluorine, methyl chloride, trichloroethylene, sulphur dioxide, silicon vapours or sulphydric acid, as presence of these gases can inhibit sensor response or been damaged. Use wire hose of the correct section for the cable input. Do not immerse the detector in water or any other liquid. Do not drill detector box otherwise it will lose its protection grade (IP65) DURTEX HC has been designed for atmospheres with lower value than 100% L.E.L. of the gas which are calibrated for and with a normal presence of ox

TECHNICAL CHARACTERISTICS Technology Voltage supply Maximum consumption Max. loop resistance (4-20mA) Max. current output (4-20mA) Fault loop current Catalytic sensor and microprocessor 10V – 30V DC 95mA at 12V DC/ 141 relay activated 250Ω 21.3 mA (Tip) < 2mA 0-100% L.E.L. (5% Vol. .Methane) -linear full range±1% L.E.L. of measurement range ± 10mV/year ± 10% L.E.L./year < 15 min –all specifications6s & 10s respectively 4 years approx. Recommended once per year -10ºC to +50ºC 0 to 90% HR with no condensation Measurement range Resolution Zero deviation Span deviation Stabilization time...