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 (03-2023) on
the main part of the Probe Assembly (19-3076).
b. Insert probe tube into Extended Adapter Block (19-3072).
c. Hand tighten the Knurled Nut (03-2023) then add 1/4 turn to
snug probe to the rest of the probe assembly.
NOTE: In order to prevent the possibility of misplacing the
Front (03-2024) and Back (03-2025) Ferrules, loosen but
DO NOT REMOVE the Knurled Nut (03-2023) before
inserting or removing the Probe Tube (19-3073).
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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