6
Tests and Approvals
Intended operating area and operating conditions
Areas subject to explosion hazards, classified by zones
The instrument is intended for the use in explosion-hazard areas of Zone 0, Zone 1 or
Zone 2 or in mines at risk due to fire damp. It is intended for use within a temperature
range of -20 °C to +50 °C, and for areas in which gases of explosion groups IIA, IIB or
IIC and temperature class T3 or T4 (depending on the batteries and rechargeable
battery) may be present. If used in mines, the instrument is only to be used in areas
known to have a low risk of mechanical impact.
Areas subject to explosion hazards, classified by divisions.
The instrument is intended for use in explosion-hazard areas according to Class I&II,
Div. 1 or Div. 2 within a temperature range of -20 °C to +50 °C, and for areas where
gases or dusts of groups A, B, C, D, E, F, G and temperature class T3 or T4 may be
present (depending on the rechargeable battery and batteries).
Safety instructions
WARNING:
CSA requirement: The sensitivity must be tested on a daily basis before first use with
a known concentration of the gas to be measured in accordance with 25 to 50 % of
the concentration limit value. The accuracy must be 0 to +20 % of the actual value.
The accuracy can be corrected via calibration.
WARNING
To reduce the danger of explosion, do not mix new batteries with old batteries and do
not mix batteries made by different manufacturers.
WARNING
Always disconnect the device from the power pack before carrying out any
maintenance operations.
WARNING
Substitution of components may impair intrinsic safety.
CAUTION
Not tested in an oxygen-enriched atmosphere (>21 % O
2
).
WARNING
High off-scale readings may indicate an explosive concentration.
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