34
│ 5 Maintenance
After approximately 5 seconds, the error message should dis-
appear again. Otherwise there is a fault (section 6
5.1.4
Testing indication accuracy with supply of fresh air
The indication accuracy with supply of fresh air test is part of the
device inspection (section 5.1.1.1
).
The device inspection has been opened. An application
has been selected. The
Dev. Test …
menu is visible (sec-
1. Make sure that only fresh air is being drawn in.
2. Select
Fresh air
from the
Dev. Test ...
menu.
3. Wait until the displayed readings are stable. A
Status: OK
message will appear.
4. Press
OK
to confirm.
Fresh air OK
will appear on the display.
This concludes the
Fresh air
test.
If the
Status: OK
message does not appear within a reason-
able amount of time, the air inflow does not correspond to the
limit values stored in the device (section 7.3
). Move the device
somewhere else and repeat the test.
If the
Status: OK
message still does not appear when the test is
repeated, the device must be re-adjusted (section 5.2
5.1.5
Testing indication accuracy with supply of test gas
The indication accuracy with supply of test gas test is part of the
device inspection (section 5.1.1.1
).
All test gases specified in the device must be tested. The number
of specified test gases depends on the model and the optional
additional equipment.
The following resources are needed for the test:
●
Test gas (e.g. 1.00 % vol. CH
4
, gas mixture)
SEWERIN recommends the test gas
Bio IR
as the gas mixture.
It contains 60 % vol. CH
4
, 40 % vol. CO
2
and 180 ppm H
2
S.
●
Test set for the supply of test gas (e.g.
SPE VOL
)
