Hygrometer Calibration Instructions

[chickie_mama]

I need to calibrate mine to check for accuracy. Found these instructions. Thought they would be helpful to someone else.

Good Luck everyone!

To calibrate a hygrometer you will need:
1/2 cup table salt
approximately 1/4 cup water
coffee cup
hygrometer
large re-sealable freezer bag

1. Place 1/2 cup of salt in the coffee cup, and add the water. Stir for a bit to totally saturate the salt (the salt won't dissolve, it will be more like really wet sand).

2. Place the salt/water mix in a re-sealable plastic bag, along with the hygrometer, and seal the bag. Note: make sure none of the salt/water mix comes in direct contact with the hygrometer.

3. Let this bag aside at room temperature for 8-12 hours, in a location where the temperature is fairly constant.

4. After 8-12 hours, check the reading of the hygrometer. It is best to read it while still in the bag.

The relative humidity in the sealed bag with the salt/water mix should be 75 percent (mine read about 72 percent).

5. For adjustable hygrometers, adjust to read 75 percent. You will have to do this very quickly, or remember how much you need to adjust the setting

 

[Mahonri]

Is this stickied somewhere? It should be.

 

[chickie_mama]

Just hope they help someone besides myself.

 

[walkswithdog]

I'm pretty sure it's under the Read Me's on Hatching somewhere. That's where I found it.

Good luck with the calibration...

 

[chickie_mama]

I Googled it.... this came from about.com

 

[Kayles Quail Farm]

I need to calibrate mine to check for accuracy. Found these instructions. Thought they would be helpful to someone else.

Good Luck everyone!

To calibrate a hygrometer you will need:
1/2 cup table salt
approximately 1/4 cup water
coffee cup
hygrometer
large re-sealable freezer bag

1. Place 1/2 cup of salt in the coffee cup, and add the water. Stir for a bit to totally saturate the salt (the salt won't dissolve, it will be more like really wet sand).

2. Place the salt/water mix in a re-sealable plastic bag, along with the hygrometer, and seal the bag. Note: make sure none of the salt/water mix comes in direct contact with the hygrometer.

3. Let this bag aside at room temperature for 8-12 hours, in a location where the temperature is fairly constant.

4. After 8-12 hours, check the reading of the hygrometer. It is best to read it while still in the bag.

The relative humidity in the sealed bag with the salt/water mix should be 75 percent (mine read about 72 percent).

5. For adjustable hygrometers, adjust to read 75 percent. You will have to do this very quickly, or remember how much you need to adjust the setting

Thank You VERY much for posting these instructions. I'd never hear of salt calibration until today and after my current hatch is completed, I will check to see what my hygrometers read using that test.

 

[Kayles Quail Farm]

I need to calibrate mine to check for accuracy. Found these instructions. Thought they would be helpful to someone else.

Good Luck everyone!

To calibrate a hygrometer you will need:
1/2 cup table salt
approximately 1/4 cup water
coffee cup
hygrometer
large re-sealable freezer bag

1. Place 1/2 cup of salt in the coffee cup, and add the water. Stir for a bit to totally saturate the salt (the salt won't dissolve, it will be more like really wet sand).

2. Place the salt/water mix in a re-sealable plastic bag, along with the hygrometer, and seal the bag. Note: make sure none of the salt/water mix comes in direct contact with the hygrometer.

3. Let this bag aside at room temperature for 8-12 hours, in a location where the temperature is fairly constant.

4. After 8-12 hours, check the reading of the hygrometer. It is best to read it while still in the bag.

The relative humidity in the sealed bag with the salt/water mix should be 75 percent (mine read about 72 percent).

5. For adjustable hygrometers, adjust to read 75 percent. You will have to do this very quickly, or remember how much you need to adjust the setting

Did you use luke warm water or cold water to do this test?