33
17.
Press CAL to accept.
The unit will automatically power off.
7.
pH Calibration
IMPORTANT: Always “zero” your Ultrameter
III
with a pH 7 buffer
solution before adjusting the gain with acid or base buffers, i.e., 4 and/
or 10, etc.
a.
pH Zero Calibration
1.
Rinse sensor well and cell cup 3 times with 7 buffer solution.
2.
Refill both sensor well and cell cup with 7 buffer solution.
3.
Press
to verify the pH calibration. If the display shows
7.00, skip the pH Zero Calibration and proceed to section b.
pH Gain Calibration.
4.
Press
to enter calibration mode. The “CAL”, “BUFFER”
and “7” annunciators will appear (see Figure 6). Displayed
value will be the uncalibrated sensor.
NOTE: If a wrong buffer is added (outside of 6-8 pH), “7”and “BUFFER”
will flash, and the Ultrameter
III
will not adjust. The uncalibrated pH value
displayed in Step 4 will assist in determining the accuracy of the pH sensor.
If the pH reading is above 8 with pH 7 buffer solution, the sensor well needs
additional rinsing or the pH sensor is defective and needs to be replaced.
5.
Press
or
until the display reads “7.00”.
NOTE: Attempted calibration of >1 pH point from factory calibration will
cause “FAC” to appear. This indicates the need for sensor replacement
(ref. Troubleshooting pg. 52) or fresh buffer solution. The “FAC” internal
electronic calibration is not intended to replace calibration with pH
buffers. It assumes an ideal pH sensor Each “FAC” indicates a factory
setting for that calibration step (i.e., 7, acid, base).
Summary of Contents for POOLPRO PS9TKB
Page 1: ...ULTRAMETER III Operation Manual MODEL 9PTKB 24 July 2019 ...
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