Veris U3 Operating Instructions Manual page 26

Pub# OM20-U3-pH
The software will read the electrodes for 10 seconds, displaying the output (as it counts seconds):
Figure 30
After 10 seconds, the software will display the final pH reading and offer the options to Accept pH 4
buffer readings; Redo pH 4 buffer readings; or Cancel pH electrode system check. If the readings
are satisfactory, press Accept; if the readings are suspect, press Redo to return to re-do pH 4.
Figure 31
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 from the cup. Rinse the electrodes,
electrode holder, and solution cup using the manual wash for at least 10 seconds. Lower the pH
electrodes into solution cup containing pH buffer 7 solution.
Figure 32 and 33
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.
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