sewerin EX-TEC PM 4 - Maintenance; Function Control and Accuracy Testing

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5 Maintenance
5 Maintenance
In accordance with legal regulations, device maintenance com-
prises the following elements:
z Function control
z Indication accuracy test
z Adjustment
z Servicing
Note:
As specied in EN 60079-29-2 / BGI T 023, port-
able gas warning devices must be tested by the
user immediately prior to each use. The test scope
comprises the function control and the indication
accuracy test using test gas.
5.1 Function control
The function control must be carried out by the user before com-
mencing work.
The following elements must be tested:
z External condition of device incl. probe systems
z Function of controls
z Battery charge status
z Airow passages
z Pump function (Section 5.5)
z Zero point when switching device on (fresh air)
z Accessories
When switching the device on, if the zero point deviation is greater
than is permissible for the respective gas type (see appendix: Gas
types), you must readjust the zero point (see Section 5.3).
The following must also be tested:
z Indication accuracy with test gas (Section 5.2)