01st Sep2011

How to Calibrate an Analog Hygrometer

by GoodFellasCigars

You will need:

  1.  An analog hygrometer
  2.  A bottle cap the size of a water bottle cap or bigger
  3.  Salt
  4.  Water
  5.  A sealable plastic container or sealable plastic bag

Complete the following steps calibrate your analog hygrometer:

  1. Take the cap and fill it with salt until it is just under level with the top of the cap
  2. Add a slight amount of water to the salt in the cap in order to just make a salt paste mixture. DO NOT over saturate.
  3. Place the cap with the pasty salt mixture in to the container or bag and be careful to not spill its contents
  4. Place the analog hygrometer into the container or bag as well
  5. Seal the container or sealable bag air tight
  6. Wait for twenty-four hours
  7. Take out the hygrometer from the container or plastic bag
  8. Check and note the reading on the analog hygrometer
  9. If the hygrometer does not read seventy-five degrees adjust by inserting a flat head screw driver in the back of the analog hygrometer in the center knob and turning either left or right until it reads seventy-five degrees.  Turning left will dial the hygrometer up and turning right will dial it down.

If you have followed these steps you have now successfully calibrated your analog hygrometer

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