Hygrometer Open
Some sample opening procedures of hygrometers to adjust

Sample A

Sample B

Step 1

Step 2

This hygrometer is a little tricky. Please use just the point of the knife to lifz the lid off. Lever at several points around the lid. The lid will come off in some steps.

Step 3

The hygrometer is now open and ready to be set. The needed time to reach step 3 shouldn't exceed some seconds.
Please see our FAQ on Hygrometer Adjustment and Calibration to set the gauge.