... From setup menu, choose calibration and immerse electrode into indicatedcalibration solution, press ENTER key and meter is automatically calibrated.Auto ... theslope value, user decides whether to change the electrode.Automatic Temperature Compensation:Using the supplied temperature probe, ... (H)mmWeight: 1.7kgMeter Included:pH Electrode (Made in UK), ORP Electrode, pH Buffers, Temperature Probe, Power ...