Siemens MicroSAM Operating Instructions Manual page 15

Explosion hazard
 The device is designed to analyze flammable and non-flammable gaseous media.
 For the analysis of flammable gases or use of hydrogen as a carrier gas, oxygen may
 Oxygen at concentrations up to 21% and pressure up to 1.1 bar (110 kPa) is permissible
 Oxygen at concentrations up to 21% and pressure > 1.1 bar (110 kPa) is not allowed
 The pneumatic conditions for the sample and the auxiliary gas must be strictly observed:
 If flammable gases are connected at a pressure > 1.1 bar (110 kPa), the chromatograph
 Flammable gases which are explosive under the analysis conditions even with the
 The permissible ambient temperature range is -30° to +55° C.
 The temperature range for continuous operation is -20 °C to +50 °C.
MicroSAM
Operating Instructions, 06/2012, C79000-G5376-C560-07
WARNING
Hydrogen or inert gases are used as auxiliary gases.
only be present in concentrations ≤ 2% in the sample.
for operation only if an additional constructive explosion protection measure is
implemented, for example, installation of a flame arrester between the process
connection and gas chromatograph.
under normal operating conditions for explosive mixtures.
– Sample gas ≤ 1.6 bar (160 kPa) absolute pressure
– Auxiliary gas ≤ 8 bar (800 kPa) absolute pressure
and the gas line must be purged with process gas prior to analysis.
exclusion of oxygen (acetylene and ethylene oxide), may only be present in the
analyzed mixture in concentrations that are uncritical for safety-related engineering.
Acetylene and ethylene oxide can be present in a concentration up to 100%.
General information
2.4 Protection against explosion
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