Fluke DATAPAQ Tracker XL2 User Manual page 68

*LO* Temperature measured was below the range of the logger.
*HI* Temperature measured was above the range of the logger.
*** Calculation cannot be performed (not necessarily because the data are invalid). Does
not appear in View Data analysis mode.
Probes with an intermittent open circuit may produce spiky, erratic profiles.
Note that spikes are inevitable when probes are disconnected from a running
data logger. Typical causes of invalid or interrupted data are:
• Thermocouple becoming detached from the logger.
• Faulty connection.
Readings which are inconsistent with those of other probes may be caused by a
short circuit (see 'Logger Diagnostics', below). The probe concerned must be
replaced.
Logger Diagnostics
Running the data logger diagnostics (p. 14) provides information on the status
of the logger and the means to test the thermocouple probes. Short circuits
and open circuits may be revealed: these are sometimes intermittent, and can
be a function of temperature and/or rate of change of temperature, or caused
by bending the probe cable. See p. 43 for this and other means of testing the
thermocouples.
Datapaq Service Department
If you cannot resolve your problem, please contact the Service Department at
Datapaq (see title page for contact details).
68
Troubleshooting
OVEN TRACKER XL2