LACO USER MANUAL - GASCHECK G SERIES
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© 2018 FLUIDX Equipment, Inc.
Variation in temperature, humidity, and background gas may result in a
constant level being detected on the instrument. To reset to Zero, hold
the instrument away from the source of contamination and then press the
ZERO key. The instrument’s display will return to a near Zero reading.
The following things will affect the instrument’s reading:
• CO
2
and moisture from the breath of the instrument user
• Barometric air pressure and background temperature
• Sources of cold and heat
4.3
PROBE OPTIONS
In some applications the gray probe cover may restrict access to the area
under test. The gray probe cover can be removed by pulling it off the
instrument. When the gray cover is removed, great care should be taken
when using the instrument. Note the following precautions:
• Do not remove the semi-transparent probe sleeve. This sleeve ensures
that the metal inner probe remains 1 mm from the surface of the test
area, avoiding accidental dirt and moisture ingress.
• Do not touch the probe, especially the brass sensor housing. Heat from
fingers can result in significant changes in signal causing false readings.
• Avoid placing the probe on wet or dirty surfaces. Blockage of the probe
will result in instrument failure.
Figure 2: Changing Probes
Some applications may require a longer probe to gain access to pneumatic
joints and seams to be tested. The GasCheck is also supplied with a 300mm
probe that can be changed by the user.
To change probes, carefully do the following:
1. Switch the instrument to OFF.
2. Remove the outer gray probe cover (see 1).
3. Place the box wrench (supplied with the instrument) over the existing
probe so the spanner fits over the brass nut (see 2), and unscrew the
probe in a counterclockwise direction (see 3).
4. Withdraw the wrench and probe assembly (see 4).
To refit the short or the long probe, follow the steps above but in reverse
order.
CAUTION
When using the box wrench to tighten the probe nut,
ensure the nut is firmly tightened. Do not use additional
tools; they may damage the tread.
