Description

Calibrating the pH Electrode

pH electrodes should be calibrated fully at least once a week to ensure optimum accuracy. Full calibration involves calibrating at pH 7.00 first, then at pH 4.01 and/or pH 10.00. The
probes allow for both two and three point pH calibration. Should you decide to carry out just a two point calibration, the probe will automatically calculate and save a calibration
value for the uncalibrated third point in order to maintain the electrode’s linearity over the full range of 0 – 14.

PH/ORP Electrode Storage

The PH/ORP Electrode is a clear gel-filled and the electrode cap contains a sponge that should be kept moist with a few drops of pH Electrode Storage Solution (Part No, SS-25) when the probe isn’t being used. The storage cap is essential for maintaining the integrity and performance of the pH and ORP electrode. These electrodes contain a sensitive glass membrane and a reference junction that must remain hydrated. If they are allowed to dry out, the electrode can be permanently damaged, leading to inaccurate readings and premature failure.

ISE Electrodes

All ISE electrodes are supplied with a red rubber sealing cap. These caps should be fitted to all ISE Electrodes when using pH calibration solutions or other ISE calibration solutions other then that specific for the ISE being calibrated in order to protect the ISE electrodes from the effects of the buffer solution and interfering ions. Offsets should be temporary, but best avoided because they can cause significant errors during calibration and normal operations.