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Thermocouple wiring polarity must be
correct. If readings decrease as the
temperature increases, the thermocouple
wires may be reversed. The red wire is
negative for thermocouple wires
manufactured in North America.
If no probe is connected the display will
read “open”.
Thermocouples are sensitive at the tip or
measuring
junction. When
taking
measurements, allow time for the reading
to stabilize. Multiplying the time constant
of the probe by 5 will give you the
approximate time required.
