I have calibrated my meter, but when I attach the pH electrode, the reading is off. Whats wrong?
All pH electrodes will have a small amount of offset as manufactured. The zero adjustment on your meter is designed to correct this offset. Consequently, you must calibrate the meter and electrode together, as a system. Sensorex supplies a pH Checker to calibrate or isolate a problem to your meter or electrode. But final calibration must be performed with the electrode connected to the meter. Sensorex also supplies buffers for performing pH and REDOX system calibrations. Q: My new pH electrode is unstable and/or has an offset when installed in my system. A: The most common cause for this problem is an electrical ground loop in your system. To verify this problem, remove the electrode and calibrate it with a known buffer solution in a beaker. If the electrode measures within specification (stable and adjustable zero) when calibrated, place a copper wire in the beaker and the other end in your system. If the reading become unstable or shifts, a ground loop is your problem. The source of
All pH electrodes will have a small amount of offset as manufactured. The zero adjustment on your meter is designed to correct this offset. Consequently, you must calibrate the meter and electrode together, as a system. Sensorex supplies a pH Checker to calibrate or isolate a problem to your meter or electrode. But final calibration must be performed with the electrode connected to the meter. Sensorex also supplies buffers for performing pH and REDOX system calibrations.
