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72
BM 25A/AW
Instruction Manual
ATEX areas and general rules
If the device is used in a contaminated atmosphere, the catalytic sensor must be
calibrated it before its next use.
Silicon vapors or other contaminants may have an adverse effect on
catalytic sensors (slot 1) for combustible gas detection, and may distort
measurements (under-estimated measurements).
The gas monitor can be used in explosive atmospheres in Group II surface industries
and Group I mines containing firedamp.
The ambient temperature range for use is from
–20° C to + 55° C.
Depending on the type of sensors used on the device, categories covered by the gas
monitor are:
a) BM 25A/AW without infrared sensors
■
Surface industries: Category 2G, use in zones 1 or 2
■
Mines containing firedamp: Category M1, for use in all gas levels
b)
BM 25A/AW with infrared sensors
■
Surface industries: Category 2G, use in zones 1 or 2
■
Mines containing firedamp: Category M2, for use below a certain concentration of
gas
The following operations are prohibited in explosive atmospheres:
■
Opening of the instrument: sensors cover or rear cover.
■
Charge the batteries using a universal or vehicle charger.
■
Link-up with a computer.
All servicing, adjustment and maintenance operations must be performed by duly
approved personnel.
The battery pack must be replaced by the original part specified by the manufacturer
–
OLDHAM SIMTRONICS P/N 6311082.
Input/output parameters
Gas monitor recharge connector
The charger provided by OLDHAM SIMTRONICS should only be used outside of the
ATEX areas. When the recharging is done by a charger other than the one provided by
OLDHAM SIMTRONICS, its characteristics must not exceed a voltage of 30VDC and a
current of 30 A.
Summary of Contents for BM 25A/AW
Page 1: ...BM 25A AW Area Gas Monitor Part Number NP25AEN Version C 4 User Manual ...
Page 10: ...10 BM 25A AW Instruction Manual Product Overview Figure 2 Product Overview ...
Page 18: ...18 BM 25A AW Instruction Manual ...
Page 34: ...34 BM 25A AW Instruction Manual ...
Page 70: ...70 BM 25A AW Instruction Manual ...
Page 75: ...9 Special Instructions 75 CSA Control Drawing for BM 25A AW Connections ...
Page 78: ...78 BM 25A AW Instruction Manual ...