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Heat-Prober
Platinum-RTD Thermometers User Manual
2.1 Meter Operation
The Heat-Prober instrument has an accurate measuring range as stated on the front label.
The probes, however, may not be capable of this entire range of use. Wahl probes are
typically capable of -40°C to 500°C (or -40°F to 900°F).
The digital readout will show resolution to 0.1° increments from -180.0°C to +190°C (or -290°F
to 375°F). At approximately 190°C (or 375°F) the instrument automatically ranges to one
degree C or F resolution. When returning from higher temperatures to below 190°C (or
375°F), the instrument will automatically begin to read in 0.1° increments again.
2.2 Automatic Polarity
When the temperature sensed is below zero, a minus sign will automatically show on the
digital display. Absence of a sign indicates positive temperature.
2.3 Digital Display and Accuracy
The characteristic of digital readouts is a flicker in the least significant digit. In this instrument,
you can expect to see a 1-digit flicker, particularly when reading 0.1 increments.
Variations over 0.1 will be attributable to sensor temperature changes.
Figure 2-1. Digital Heat Prober Major Features
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