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Dräger Polytron 7000
Calibration
●
Connect hoses. Integrate flowmeter with hose distributor.
Using a test gas ampoule
Test gas ampoules are only used for the sensitivity adjustment for the target gas.
Equipment:
– calibration flask (order no. 68 03 407)
– adapter (order no. 68 04 620)
– Test gas ampoule
– hose, type appropriate to the gas properties (e.g. FKM hose order
no. 12 07 068)
1. Plug the adapter onto the calibration flask.
2. Connect hoses.
6.3
Adjusting the zero-point
Prerequisite:
– The warm-up phase of the sensor is completed (see section 5.5).
– Test gas supply is prepared (see section 6.2).
Zero adjustment can be aborted at any time. To abort during calibration, select
Previous
.
If no entries are made, the gas detector automatically switches over to measuring
mode after 15 minutes.
Procedure, using an EC-H
2
S sensor as an example
1. Select
Calibration
>
Zero calibration
>
EC-H
2
S
.
The 4-20 mA interface issues the maintenance signal.
2. Supply zero gas or fresh air, respectively:
31495
OK
+
2SWLRQ
291
19
OK
68 07 407
68 04 620
+
