Veris 3150 MSP3 Operating Instructions Manual page 27

Pub. # OM20-MSP3-3D
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 16
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 system check. If the readings are satisfactory, log pH 7 reading and press continue; if
the readings are suspect, press redo to return to pH 7 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 17
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. The electrode(s) responsible for
failed system check should be removed and either cleaned (See section 5-7) or replaced and the
system check procedure repeated.
Tip: It is still important to perform the system check at least daily, since this process is important to
test electrode quality.
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