Myron L 6Psi and 4P - Manual (Page 22)

18
reduce your variation from factory setting by pressing or .
6. Press to accept the new value. The pH Zero Calibration
is now complete. You may continue with pH gain Calibration or
exit by pressing any measurement key.
b. pH gain Calibration (6Psi)
Important: Always calibrate or verify your Ultrameter II with a pH 7
buffer solution before adjusting the gain with acid or base buffers, i.e., 4
and/or 10, etc. Either acid or base solution can be used for the 2nd point
“gain” calibration and then the opposite for the 3rd point. The display
will verify that a buffer is in the sensor well by displaying either “Acd” or
“bAS”.
1. The pH calibration mode is initiated by either completion of the
pH Zero Calibration, or verifying 7 buffer and pressing the
key twice while in pH measurement mode.
2. At this point the “CAL”, “BUFFER” and “Acd” or “bAS”
annunciators will be displayed (see Figures 7 and 8).
NOTE: If the “Acd” and “bAS” indicators are blinking, the unit is indicating
an error and needs either an acid or base solution present in the sensor
well.
3. Rinse sensor well 3 times with acid or base buffer solution.
4. Refill sensor well again with same buffer solution.
5. Press or until display agrees with buffer value.
Figure 7
BUFFER
pH
CAL
Figure 8
pH
BUFFER
CAL