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OLC(T)100
Technical manual
Metrological performance for the detection of
flammable gases
Standard C1000 OLC/OLCT100 filament version detectors conform to IEC / EN
60079-29-1 standards, Suitability requirements for the operation of flammable gas
detectors, category 0 to 100% LIE Group II, reference gas 0-100% LIE Methane
and Propane.
These detectors are classed as safety devices according to ATEX 94/9/CE
Directive and may, therefore, contribute to limiting the risks of explosion. For this
to be so, they must be connected to Oldham type MX15, MX32, MX42A, MX48,
MX43, MX52 or MX62 detection units, or otherwise connected to measurement
units with 4-20 mA inputs conforming to section 1.5 of Annex II of Atex Directive
94/9/CE and compatible with their characteristics (see transfer curve).
Cable inlets
These shall be of a type certified for use in explosive atmospheres. They shall be
protected to (or better than) IP66 and shall be installed in accordance with
standard ICE/EN 60079-14 (whatever edition is in force), and possibly in
accordance with further requirements related to the local or national regulations.
The cables should be capable of use at a temperature equal to or greater than
80°C.
Threaded joints
The threaded joints on the OLC(T)100 may be lubricated to maintain fire-proof
protection. Only non-hardening lubricants or non-corrosive agents having no
volatile solvents may be used. Warning: silicone based lubricants are strictly
forbidden, since they contaminate the OLC(T)100 detector elements.
Operational safety
The detector is certified by INERIS (in process) to be in conformity with the
requirements of standard EN 50402 for SIL capability 1 and 2 for the CH
4
and HC
versions. Applicable since 2005, this standard is concerned with electrical
apparatuses for the detection and measurement of oxygen or toxic or flammable
gases or vapors, and defines the requirements relating to the safety function of
fixed gas detection systems.
The detector has been developed in conformity with standard EN/CEI 61508.
