Physitemp Instruments TH5 - Manual (Page 6)

6.6 Checking high end of temperature range:
Prepare a water bath at approximately 45°C. Follow measurement instructions given in
Section 6.5.
6.7 Allowing for some reading error in the mercury thermometer (there can be none in reading the
digital instrument display) and possible probe error, readings should agree within the limits noted in
Section 9.7) This means, as an approximate rule-of-thumb, that differences between standard and
instrument readings should not exceed 0.2°C. The exact error limits depend on the actual temperature at
which the calibration is checked.
6.8 If the instrument appears to be out of calibration based on the foregoing checks, it should be
returned for service (see Section 10).
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