Measuring High Oxygen Concentrations - Siemens SIPROCESS GA700 Compact Operating Instructions

Safety notes
2.4 Measuring high oxygen concentrations
Pollution degree class when using the explosion protection Ex e
There is a risk of certifications becoming invalid
When using the explosion protection Ex e, pollution degree 2 must be complied with inside the
device (in accordance with IEC 60664-1).
Improper device modifications
Risk of electrical shock and device damage. Fuses are not replaceable. Please contact Siemens
service.
2.4

Measuring high oxygen concentrations

Measuring gas mixtures with high oxygen concentration
Explosion hazard
Introducing non-flammable gas mixtures with an oxygen concentration of more than 21% can
result in an accumulation of oxygen in increased concentration in the enclosure. There is a
danger of explosion.
• Purge the enclosure with inert gas (nitrogen) during the analysis when introducing non-
Note
Measuring high oxygen concentrations
For the measurement of high O
that come in contact with the sample gas are free of oil and grease and do not contain any
particles that could react with O
We highly recommend you use specially cleaned analyzer modules with the "Cleaned for O2"
option for such measurements.
Note
Measuring high oxygen concentration in hazardous areas
The analysis of gas mixtures with an oxygen content of more than 21% does not form part of the
type test certificate. Therefore, the analysis of these gas mixtures is not permitted without
further consideration.
18
WARNING
WARNING
WARNING
flammable gas mixtures with an oxygen concentration of more than 21%.
concentrations in excess of 25%, it is necessary that all parts
2
.
2
SIPROCESS GA700 rack and wall mounted devices
Compact Operating Instructions, 06/2023, A5E35134047-AB