How to calibrate digital thermometer Voltcraft PL-125-T4USB?
My digital thermometer Voltcraft PL-125-T4USB lost its calibration after staying about a week with fully discharged batteries. All channels show different crazy temperatures, by 10-15 degrees higher than the real ones, even with the sane new K-type thermocouple. The "instruction" found by chance - http://www.produktinfo.conrad.com/datenblaetter/100000-124999/123413-an-01-en-KALIBRIERANLEITUNG_VOLTCRAFT_PL_125_T4US.pdf - does not seem to work and is not quite consistent (button MIN/MAX cannot be "released" without being pressed first"). It seems to be a bad translation from another language (German?)
Peter, CERN, Geneva, Switzerland