20
8.2
Metrological specifications for explosive gas and oxygen measurement
detectors
In case of exposure above the measuring range, it is mandatory to bump test
the instrument with gas and/or to perform a calibration.
In the event of a change of position, it is necessary to re-calibrate the detector.
The OLC/OLCT 20 transmitter sensors intended to measure explosive gasses and oxygen are
classified as safety devices and may therefore contribute to limiting the risk of explosion.
Detectors comply with the following European standards:
Explosive gas detectors:
-
OLC 20 explosive gas detectors comply with European standards EN 50054 and EN
50057 for Methane (calibration gas), Propane and Hydrogen (gasses following response
curves) where they are used with the following OLDHAM controllers SV 4B, MX 15,
MX 32, MX 42A, MX 43, MX 48 and MX 52.
-
OLCT 20 explosive gas detectors comply with European standards EN 50054 and EN
50057 for Methane (calibration gas), Propane and Hydrogen (gasses following response
curves), where they are used with SV 4B, MX 15, MX 32, MX 42A, MX 43, MX 48, MX
52 and MX 62 OLDHAM controllers, or where they are connected to measurement
devices with 4-20 mA inputs in accordance with paragraph 1.5 of Appendix II of the
ATEX 94/9/EC Directive and are compatible with their characteristics (cf. transfer curve).
Oxygen detectors:
-
OLCT 20 oxygen detectors
comply with European Standard EN 50104 where they are
used with MX 15, MX 32, MX 42A, MX 43, MX 48, MX 52 and MX 62 OLDHAM
controllers, or where they are connected to measurement devices with 4-20 mA inputs in
accordance with paragraph 1.5 of Appendix II of the ATEX 94/9/EC Directive and are
compatible with their characteristics (cf. transfer curve).
