Why is my rain reading low or high?
Low Rain Readings:
Several things could be causing an inaccurate low rain reading.
- Check that the rocker tips freely.
- Check the funnel and the inside of the rain sensor for insect nests or debris that may cause loss of rocker motion.
- Be sure to mount the rain sensor level.
High Rain Readings:
- Check the placement of the rain sensor. Ensure it is in an open area away from roof lines or water runoff.
- Be sure to mount the rain sensor level.
- Check for sources of RF (radio frequency) interference such as other wireless rain sensors, ham radios or electric transformers.
If you have confirmed all the above, try a Tip Test:
Manual Tip test:
While the sensor is unmounted, write down the Total Rain reading or reset the Rain Total to 0.00. Use the eraser end of a pencil to manually tip the rocker of the rain sensor 10 times. Wait at least 2 minutes for all the rain to collect.
Water Tip Test:
After mounting the sensor, write down the Total Rain reading or reset the Rain Total to 0.00 then slowly pour water into the funnel to tip the rocker of the rain sensor 10 times. Wait at least 2 minutes for all the rain to collect.
Compare Tests:
If they are the same, then the rain is reading correctly. If the rain readings are different, repeat the test 3 times to avoid human error. Then look for causes such as mounting too tight or debris clogging the funnel.