User Guide

DigiTemp Digital Thermometer - Intrinsically Safe Version
Instruction Manual
Page 4
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3. Fully immerse the stem in a bath containing a mixture of clean crushed ice and water. Allow time for the stem to settle at
the ice bath temperature, stirring occasionally. Adjust the zero trimmer if necessary until a reading of 0.0°C (or 32.0°F) is
obtained. (Remember that soluble salt impurities can result in a bath temperature below 0.0°C.)
4. Transfer the stem to a high temperature calibration bath (e.g. 100.0°C) containing a reference thermometer if available.
The tip of the DigiTemp's stem should be placed close to that of the reference thermometer. Allow time for the stem to
reach bath temperature, then adjust the span trimmer until the display reading matches the reference.
5. Return the DigiTemp stem to the ice bath and check the 0°C reading. It may be necessary to repeat the above zero and
span adjustments several times until both readings are satisfactory.
6. Refit the dial using its two screws taking care to re-position the bonding strap eyelet on top of the 3 o'clock dial pillar.
The dial screw goes through the dial, then through the eyelet, then into the pillar. Refit the gasket, window and bezel and
tighten with firm hand pressure.
CAUTION!
Observe correct safety procedures when working with high temperature calibration baths.
Fuse replacement
The 100mA encapsulated fuse is a safety-critical approved component and should only be replaced with one of the same type.
Suitable replacements, part number 28467/04, are available from British Rototherm. Should the fuse fail during normal operation
the reason for failure must be identified and any faults corrected before the fuse is replaced.
Warranty
The Rototherm DT1/2X Digital Thermometer is guaranteed to be free of manufacturing defects for a period of one year from the
date of purchase. To obtain service under this warranty the instrument should be returned in its original packaging either to British
Rototherm or its distributors.
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Figure 3 - Calibration trimmer positions
Thermocouple Varients
Platinum RTD Varients