Veris-technologies pH Detector - Operating Instructions Manuel d'utilisateur télécharger pdf (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

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Veris-technologies pH Detector - Operating Instructions Manuel d'utilisateur Page 16