Pulse Instruments
System 4 Manual
Version 1.6
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7. Maintenance
7.1 Electrode
Cleaning
pH and ORP electrodes are cleaned the same way. Remove the electrodes from the flow cell.
Take a 1:100 diluted solution of acid to water in a cup, and place the electrode front tip in the
solution at least two inches deep, for a minimum of five to fifteen minutes. Rinse the tip and re-
check the calibration.
7.2 Calibration
7.2.1 pH
Calibration
1. Place the pH probe in buffer solution 7.00 and
allow sufficient time for the electrode to reach the
buffer solution value.
2. Press and hold the “CAL” button for three seconds
to initialize the calibration process.
3. The “CAL” indicator light will turn on and the top
display will start blinking. The second display will
show “4-7” for a few seconds.
4. The controller will automatically calibrate to the
buffer solution value (pH 7.00). The first and
second display will stop blinking after the
controller is calibrated to pH 7.00. The second
display will show “- 7”.
