Campbell Scientific CR1000 Measurement and Control System - Manual (Page 303)

Section 8. Operation
303
outside the chamber. The temperature of this bar was also measured by another
datalogger. Differences between the temperature measured by one of the
thermocouples and the actual temperature of the bar are due to the temperature
difference between the terminals the thermocouple is connected to and the
thermistor reference (the figures have been corrected for thermistor errors). Figure
Panel-Temperature Gradients (Low Temperature to High)
(p. 304)
shows the errors
when the chamber was changed from low temperature to high in approximately 15
minutes. Figure Panel-Temperature Gradients (High Temperature to Low)
(p. 304)
shows the results when going from high temperature to low. During rapid
temperature changes, the panel thermistor will tend to lag behind terminal
temperature because it is mounted deeper in the CR1000.
Figure 92: Panel-temperature error summary