7
Tests and Approvals
Intended Operating Area and Operating Conditions
Hazardous areas classified by zones
The device is intended to be used in hazardous areas or mines susceptible to firedamp clas-
sified zone 1 or zone 2, within a temperature range of –20
o
C to +50
o
C or –20
o
C to +50
o
C
(depending on battery pack and batteries), where gases of explosion groups IIA, IIB or IIC
and temperature class T3 or T4 (depending on battery pack and batteries) may be present.
If used in mines, the device is only to be used in areas known to have a low risk of mechanical
impact.
Hazardous areas classified by divisions
The device is intended to be used in hazardous areas or mines susceptible to firedamp clas-
sified Class I&II, Div. 1 or Div. 2, within a temperature range of –20
o
C to +50
o
C or
–20
o
C to +50
o
C (depending on battery pack and batteries), where gases or dusts of groups
A, B, C, D or E, F, G and temperature class T3 or T4 (depending on battery pack and batte-
ries) may be present.
Safety Instructions
Only the combustible gas detection portion of this instrument has been assessed for perfor-
mance.
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.
WARNING
Before each day's usage sensitivity must be tested on a known concentration of the gas to
be detected equivalent to 25 to 50% of full scale concentration. Accuracy must be within
0 to +20% of the actual value. Accuracy may be corrected by calibration.
