Veris Technologies pH Manager - Operating Instructions - Manual (Page 25)

Pub.# OM17-MSP-pH
3-17
After accepting the pH 4 buffer readings, the software will prompt for the electrodes to be inserted
into pH 7 buffer solution. Remove the pH 4 buffer solution cup from the electrode holder. Rinse
the electrodes, electrode holder, and solution cup using the manual wash for at least 10 seconds.
Slide the pH buffer 7 solution cup onto the electrode holder.
Figure 13
Press continue to proceed with the calibration. The software will read the electrodes for 10
seconds, displaying the output. After 10 seconds, the software will display the final pH reading and
offer the options to Accept pH 7 buffer readings; Redo pH buffer 7 readings; or Cancel pH
electrode calibration. If the readings are satisfactory, log pH 7 reading and press continue; if the
readings are suspect, press redo to return to pH 7 calibration step.
After accepting the pH 7 buffer readings, the software will determine
if each electrode’s response
is sufficient to provide suitable readings. A score is displayed for each electrode; the acceptable
score range is between 75 and 102. If both electrodes are within this range, the software will
display the following screen:
Figure 14
If an ‘X’ is displayed beside one or both electrodes’ scores, this indicates that one or both of the
electrodes did not perform well enough for continued reliable use. No calibration settings are
changed if calibration is unsuccessful. The electrode(s) responsible for failed calibration should be
removed and either cleaned or replaced and the calibration procedure repeated.
Figure 15
After calibration is complete, you will have the option to use the calibrated readings or reset to the
default parameters. Tip: many operators use the default parameters rather than calibration
settings. One reason is this enables readings from one day to be compared to another. It is still
important to perform the calibration step at least daily, even if ideal settings are used. The
calibration process is important to test electrode quality.