Siemens 7MB2531 Operating Instructions Manual page 50

Continuous gas analysis
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Commissioning
5.3 Additional measures for devices in hazardous areas
Commissioning with the key switch always requires permission of the owner or a person
authorized by him. It may only be granted if it is certain that there is no explosive atmosphere
for the duration of the planned work or if the necessary precautions against the risk of explosion
have been taken (fire permission certificate).
At the end of maintenance work, make absolutely sure that the key switch is turned off again
through removal of the key.
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Compact Operating Instructions in accordance with EN 61010-1 and EN 60079-0
Compact Operating Instructions, 09/2018, A5E45779389002-01

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