Did not provide valid reading

Arrived with dead batteries and no protective plastic over display. it did calibrate according to the written procedure, however, the PH reading of distilled water or tap water was 6 instead of 7 or close to 7. Therefore I consider it defective. The instructions said to "call us" if there are problems but there was no phone number or website listed. It said to repeat the calibration when stored for a long time, however, it did not say how one gets the one time use calibration liquid packets.

###

