Industrial Scientific OLDHAM 300 Series, Operating And Maintenance Manual

Page: 30 / 49

31
V. Particular Specifications for use in Explosive Atmospheres in
Accordance with the European ATEX 94/9/CE Directive.
The CEX 300 detector meets all requirements of the European ATEX 94/9/EC Directive
pertaining to explosive atmospheres.
With performance test tested by INERIS (
the French National Institute for Industrial
Environment and Risks ), the CEX 300 is designed to measure explosive gases and is categorized as
a security device and is used to limit the risks of explosion.
Information in following paragraphs must be taken into account and followed by the person
responsible for the equipment installation site. Refer to the provisions of European ATEX Directive
99/9/EC, concerning the improvement of safety protection and the health of workers exposed to the
risks of explosive atmospheres.
1. Specifications for mechanical and electrical installations in Explosive
Zones.
All installations must be in compliance with currently enforced standards, notably standards
EN 60079-14, EN 60079-17, and EN 50281-1-2.
- This equipment is intended for surface industries in Group II, Category 2, Zone 1 and 2
(Gas) and for Zone 21 or 22 (Dust) for ambient temperatures between -20°C to 60°C for
a T6 temperature class and between -20°C to 70°C for a T5 temperature class.
- The cables will be mechanically protected.
- The transmitter body will be grounded with an external or internal terminal, both being
protected against corrosion. The operator should regularly clean the equipment to
prevent the build-up of dust on equipment surfaces.
- Detectors will be mechanically installed in such a way that the sensor will be oriented on
the underside of the detector. Tilting the detector at an angle of 45° or more past vertical
can cause measurement errors.
- Power supply: voltage at sensor terminals = 2.8 V max., Max. power = 0.8 Watts
- Consumption: 400 mA max.
2. Performance Specifications for the CEX 300 Explosive Gas Detector
The CEX 300 sensor is classified as a safety device and can help to mitigate the risks of
explosion.
The detector conforms to the following European standards:
- European standards EN 50054 and EN 50057 for Methane gas (test gas), Propane and
Hydrogen (gas following response curves), when used with INDUSTRIAL SCIENTIFIC
central detection controllers types SV4B, MX 15, MX 32, MX 42A, MX 48, and MX 52.
- Explosive gas detectors are conform with the European standard EN50402. These
detectors have SIL-capability level 1 with a calibration period of six months and SIL-
capability level 2 with a calibration period of three months.