INFICON
Operating the Instrument | 9
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9 Operating the Instrument
9.1 Preparation
NOTICE
When the instrument is put into operation the sensor withstands temporary
exposure to hydrogen concentrations up to 100%.
Avoid long exposures to high concentrations.
During normal use, the blue LED light of the instrument should be steady.
► If the LED light is flashing go to Chapter “Troubleshooting”.
► Ensure that the environment where the leak detection takes place is not
contaminated or close to other hydrogen sources.
9.1.1 Conditions for Leak Detection
To use the instrument, the test object must be filled and pressurized with tracer gas
(95% N
2
- 5% H
2
) to achieve a gas flow through the leak.
Appropriate gas filling equipment can be obtained from your local supplier.
Exercise care in the handling of tracer gas after use. Released tracer gas
contaminates the surrounding air with hydrogen and can affect subsequent
measurements for some time. Ensure that the tracer gas is ventilated away from the
target area, preferably to the outside of the building.