Hanna HI98107 - pH Tester

The pH electrode uses a unique reference cell design that utilizes a removable tissue junction. A clogged junction will usually give erratic readings that will not stabilise. Simply extracting a small portion of tissue from the water pH meter will remove any clogging by exposing a clean, fresh surface. The ability to remove any clogging will extend the life of the pH electrode.

Calibration is performed by pressing the dedicated calibration button. Once in calibration mode, the pH electrode can be calibrated at 1 or 2 points using the pre-programmed standard buffers (pH 4.01, 7.01, 10.01). When the standard value is recognised and stability is achieved, the instrument automatically accepts and stores the calibration value.

Configuration options include the auto shut-off delay and the temperature unit displayed. The auto shut off options are to turn the water meter off after 8 minutes, 60 minutes or disabled. To enter the setup mode, the user presses a button located in the battery compartment.