Title: No calibration ability?
Product review: Purchased this unit from Amazon and thought that all these units were able to be calibrated. So I purchased a one-step calibration Humidipak. After placing the unit in the pack for 24 hours, the reading was off by +3%. Went to the PlanetWaves website searching the instructions and their site on how to calibrate - nothing. Apparently there is no way to calibrate it and there is nowhere in the limited instructions, where it states it is not able to be calibrated.Oh well, I should of read the reviews further. For now I'll just subtract 3% from whatever the reading is. Otherwise the unit does what it says it does.
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