5 Maintenance
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5.1.1.5 Order
You can carry out the tests that make up the device inspection
in any order you wish. You can repeat the tests as often as you
wish provided you have not yet concluded the device inspection.
5.1.1.6 Test gases for the device inspection
The following variables depend on the application:
●
Number of tests with test gas
●
Test gases to be used
The following test gases can be used to check the indication ac-
curacy when supplying test gas:
Application (group) Test
Recommended
test gases
Interspace
1 % vol. CH
4
1 % vol. CH
4
*
Bar holes/measuring Gas mixture measuring Bio IR
Test gas CO
40 ppm CO
* in synthetic air
Note:
Use of test gases not provided by SEWERIN can cause interfer-
ence.
The concentration of the test gas used must match the specified
test gas concentration.
Changing the test gas concentration
If no test gas with the specified concentrations is available for the
test, the values can be changed to the test gas used under
Test
gas
in the adjustment menu.
