Alternative Rainfall Calibration - If You are Patient

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  • Updated 3 years ago
I tried to find the post that I saw where someone was looking for an alternative method for calibrating rainfall because they were having a issue with the 8oz cup draining.

Anyway, failing to find it, I'll put this out for consumption.

Step 1) go and get an old fashioned rain gauge, they are fairy cheap.  Set it up in a similar setting of your sensor.

Step 2) wait for rain.  Here in Albuquerque that could be a wait, but fortunately we are in our monsoon season.

Step 3) Please remember that you have to be able to discern rain that occurred before and after midnight, but this is pretty simple, just remember this aspect.

Step 4) when an event occurs, read the manual rain gauge a compare it to the console.  Keep a chart of the two values.

Step 5) if they differ, then calculate the percentage difference, and based on the 2% per 1/8th turn, make the adjustment.  Repeat steps 2 through 5 until you are satisfied.

In my case, my unit was accurate out of the box, but another task caused me to inadvertently disturb this calibration.  It took 3 iterations to get it to reporting .24" when there was .22".  I will continue to calibrate, because it is actually easier - just take time and patience.

Just another way to skin the proverbial cat.
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Posted 3 years ago

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Photo of AcuRite Charlotte

AcuRite Charlotte

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Hi Ralph,

We appreciate your tip for the rain gauge. For accuracy, however, we do recommend the drip test outlined in the instruction manual and on our Knowledge Base.