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│ 3 Operation
3.10
Leak test when using probes
If the device is used with probes, the leak-tightness of the gas
path and the probe or probe hoses must be checked regularly.
The gas path at the gas inlet is sealed off for the test. The device
must respond to this with an error message.
Frequency
The leak test must be performed at least quarterly.
Special features
●
Flexible probe HG5, flexible hand probe
Before the test, the filter cap must be unscrewed and the filter
removed.
If the filter does not exhibit any visible contamination, it can
be reinserted after the test. The original orientation must be
maintained.
●
Floating probe
The test is performed not at the probe but at the end of the
probe hose connected to the device.
Check the leak-tightness
A probe or a probe hose is connected to the device. The de-
vice is in measuring mode.
1. Seal the probe or the probe hose at the free opening, e.g.
with a finger.
The gas path is leak-tight if the following error message ap-
pears after a maximum of 10 seconds:
Pump error. Check
suction path!
2. Unblock the sealed opening again.
