Fluke 5020A Temperature and Humidity Measurement Errors, Temperature and Humidity Adjustments

5020A

Users Manual

20%	25 °C
45%	25 °C
70%	25°C
Table 7-3. 5026A-H Temperature Calibration Points
Temperature	at Relative Humidity
16 °C	45%
20 °C	45%
24 °C	45%
Table 7-4. 5026A-H Relative Humidity Calibration Points
Relative Humidity	at Temperature
20%	20 °C
45%	20 °C
70%	20 °C

Temperature and Humidity Measurement Errors

The temperature and humidity measurement errors for the sensor are obtained at each of the calibration points. This test is performed to obtain as found data for the calibration report, if necessary, and adjustment data, and then repeated after adjustments are made to obtain as left data for the calibration report. Temperature measurements are in degrees Celsius. For each calibration point Tn and RHn, do the following:

1.Set the temperature and humidity set-point.

2.Allow four hours for settling after the temperature and humidity set-points are reached before collecting data.

3.Measure the temperature with the 5026A-x probe and compare it with the temperature read from the reference thermometer in the chamber to obtain the temperature measurement error:

Terror(Tn) = T 2626 − x(Tn) − Treference(Tn)

or

Measure the relative humidity using the 5026A-x probe and compare it with the relative humidity read from the chamber to obtain the humidity measurement error:

RHerror(RHn) = RH 2626 − x(RHn) − RHchamber(RHn)

Temperature and Humidity Adjustments

Adjustments to the 5026A-x calibration parameters are required when measurement errors are excessive or outside of the specification. The calibration parameters can be accessed using the SENSOR CAL function in the CHANNEL menu. The password is required to change the parameters. Calculation of new calibration parameters requires

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