If batteries are accidently installed in the wrong polarity, a positive temperature coefficient (PTC) thermistor will protect the instrument’s electronic circuity. The instrument will operate once batteries are properly installed and the PTC thermistor is allowed to cool.
3.2 Probe Installation
The probe comes disassembled. To add the probe tip:
a. Loosen but DO NOT REMOVE the Knurled Nut
b. Insert probe tube into Extended Adapter Block
snug probe to the rest of the probe assembly.
NOTE: In order to prevent the possibility of misplacing the Front
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 difficult to slide over the gas inlet port of the unit for the first time. This was done intentionally to allow for a snug fit. Use a little dish washing liquid diluted in water or heat the end of the tube in hot tap water to help it slide onto the port.
Figure 3. Probe Installation
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