Veris Technologies pH Detector - Operating Instructions - Manual (Page 16)

OM17-pH Detector
3-6
After accepting the pH 7 buffer readings, the
electronics firmware will determine if the electrode’s
response is sufficient to provide suitable readings. A score is displayed for the electrode; the
acceptable score range is between 75 and 102. If electrode is within this range, the instrument will
display the following screen:
Figure 18
If an ‘X’ is displayed beside the electrode’s score, this indicates that the electrode did not perform
well enough for continued reliable use. No calibration settings are changed if calibration is
unsuccessful. The electrode should be removed and either cleaned or replaced and the calibration
procedure repeated.
Figure 19
After calibration is complete, you will have the option to use the calibrated readings or reset to the
ideal settings. Tip: many operators use the ideal settings 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.
If electrode doesn’t calibrate, check for film that develops on antimony tip after long storage
periods; sand lightly with 80 grit sandpaper or emery cloth.
• Antimony is harmful if ingested into your skin, mouth, or lungs
-Do not touch antimony electrode tip
-Do not ingest antimony material when sanding tip