Inficon HLD6000, Translation Of The Original Operating Instructions

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4 | Description INFICON
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4 Description
4.1 Function
The HLD6000 is made up of a basic unit and a line with handle. This line is referred to
as the sniffer line.
To locate leaks, move the tip of the sniffer line over places from which gas may be
escaping. Depending on the design of the sniffer line, you can detect different gases.
In the handle of the sniffer line is an infrared source whose light hits an infrared
sensor. If a traceable gas enters the sniffer line with the suctioned air, the light
intensity reduces.
Based on the change in light intensity, the HLD6000 measures gases and shows the
result optically and acoustically. Measured values are represented on the touchscreen
of the basic unit.
Traces of the measured gases are frequently found in the atmosphere. The HLD6000
measures the air in the atmosphere and takes the background concentration of the
measured gas and other unwanted gases into account when calculating the measured
value.
To be able to find leaks that exceeds a specific gas concentration, set one or two
setpoints on the basic unit. If you work with two setpoints, you can toggle between
both values whilst measuring by pressing a button.
To reduce the undesired influence of solvents such as alcohol in cleaning agents,
glycol, adhesives, packaging materials or exhaust gases on measurement results
(cross-sensitivity), you can use a PLUS sniffer line. In a PLUS sniffer line such signals
are attenuated by a chemical filter. See also "Accessories and spare parts [ } 80]".
However, these sniffer lines have a lower sensitivity and need more time to become
operational.