6 Maintenance
│
57
●
Zero point
Check whether the zero point is within the permitted toleranc-
es. Test gas is supplied for this purpose.
●
Indication accuracy
(for standard device inspection)
Check whether the indication accuracy lies within the permis-
sible tolerances. Test gas is supplied for this purpose.
●
Bump test
(for
ECO
device inspection)
Check whether the display is working and whether alarms are
triggered. Test gas is supplied for this purpose.
6.4.5
Presentation of results
The results of subtests and the overall results of a device inspec-
tion are displayed using the following symbols:
Device inspection passed
Loading a passed device inspection
Device inspection failed
Fig. 43: Device inspection - overview of results (
here:
Device inspection
with ExTox IR)
Left image: Zero point
Right image: Indication accuracy (
here:
H
2
S failed and the device
inspection as a whole failed.)
