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OLCT 60
FIXED POINTGAS MONITOR
USER MANUAL
done in accordance with current version of EN 60079-14 and eventually with any local or
national additional requirements that may apply in the country of installation.
The cables should be suitable for use at a temperature equal to or greater than 80°C.
10.5
Threaded joints
Threaded joints have different values than those specified in EN60079-1 standard. Oldham does
not allow the repair of the threaded joints and shall not be held responsible for any damage to
the equipment or for any physical injury or death resulting from any product modification.
The threaded joints on the OLCT 60 may be lubricated to ensure protection against explosions.
Only non-hardening lubricants or non-corrosive agents without volatile solvents may be used.
Warning: silicone-based lubricants are strictly prohibited since they contaminate some of the gas
sensing elements used in the OLCT 60.
10.6
Electrostatic Risk
Plastic accessories (see page 39) can present a risk of static discharge. Do not rub with a dry
cloth. Clean with water and wipe only with a damp cloth.
10.7
Limitations of use
Gas detection cells have certain limitations that shall be known and understood by the user.
10.8
Overange and exposition to specific components
• A bump test and/or a calibration is recommended each time the detector has been
exposed to high gas concentration and moreover if the detector went to overange
condition.
• Vapour from silicone or sulphur-containing components can affect the catalytic gas
detector sensors and thereby distort the measurements. If the sensors have been exposed
to these types of compounds, an inspection or calibration will become necessary.
• High concentrations of organic solvents (e.g. alcohols, aromatic solvents, etc.) or
exposure to quantities of gas greater than the specified range of measurement can
damage the electrochemical sensors. Inspection or calibration is then recommended.
• In the presence of high concentrations of carbon dioxide (CO2 > 1% vol.), the oxygen-
measuring electrochemical sensors can slightly overestimate the concentration of oxygen
(0.1 to 0.5% O2 overestimate).
54
NPO60GB
Revision F.2
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