68
8024250/18HT/V2-0/2020-12| SICK
O P E R A T I N G I N S T R U C T I O N S | ZIRKOR200 Ex-G
Subject to change without notice
7
MENU OVERVIEW AND EXPLANATIONS
Fig. 31: The 3 phases of a 2-point adjustment; Test gas feed, test air feed and return to process.
7.2.18
1-point adjustment (manual)
The adjustment value
Offset
is determined during 1-point adjustment of the sensor. For this
purpose, test air (test gas 1) is fed to the sensor. For systems without integrated
pneumatics, the test air feed (test gas 1 feed) must be performed manually, i.e. by the
user, and the test gas flows must be checked and, if necessary, readjusted.
Sequence
1
System code entry
2
Maintenance signal is set
3
Prompt for test air feed
(only appears for systems without flow monitoring)
4
Adjustment with test air
5
Prompt to terminate test air feed
(only appears for systems without flow monitoring)
6
Display of the process return when the difference between the previously measured O
2
concentration in the process and the O
2
concentration with test air is more than 3.00%
7
Entry O
2
concentration test gas 1
(not applicable for test air)
8
Display of adjustment results
(max. 1 minute)
6
Cancel adjustment
7
Progress bar
Note:
The test gas concentration for test air is not entered because it is known (20.95% O
2
).
The test gas concentration(s) is (are) only entered after the test gas/process gas feed
processes.
