What can go wrong - troubleshooting humidity measurements
If you suspect hygrometer readings may be incorrect:
- make sure all equipment is switched on and all cables are connected
- consider whether the hygrometer and the conditions have had long enough to stabilise
- check that the temperature is as expected (particularly for relative humidity measurement)
- check the most recent calibration certificate, in case the hygrometer simply has a large calibration error. If so, applying a suitable calibration correction should bring the result to a realistic value.
- consider comparing against another hygrometer as a check
- beware of human error ... mistakes in recording, mis-reading, wrongly numbering sets of sensors ...
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