Figure 3. Probe Installation
3
If batteries are accidently installed in the wrong polarity, a positive
temperature coeffi cient (PTC) thermistor will protect the instrument’s
electronic circuitry. The instrument will operate once batteries are
properly installed and the PTC thermistor is allowed to cool.
3.2 Probe Installation
Install the probe by sliding the end of its tubing over the gas inlet
port on the top right side of the instrument as shown in Figure 3. The
tubing may be diffi cult to slide over the gas inlet port of the unit for
the fi rst time. This was done intentionally to allow for a snug fi t. If
necessary, use a little dish washing liquid diluted in water or heat the
end of the tube with hot tap water to help it slide onto the port.
GAS INLET PORT
LINE
DRYER
PROBE
HANDLE
When changing
probe tubes,
hand tighten nut,
and then use a
wrench to tighten
≈
1
fl
at to seal.
