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PART THREE - OPERATION
SECTION 4 - CALIBRATE MENU
Model P63 pH Analyzer
Rev. 7-1201
48
☞
3.
Determine the pH value of the sample using laboratory
analysis or a calibrated portable pH meter.
4.
Press the
CAL key
(display indicates that sample cali-
bration is in progress).
5.
Press the
ENTER key
to continue. The next screen
(example shown below) prompts you to key in the
known value of the sample (determined in step 3).
NOTE:
There probably will be some difference be-
tween the “Smpl” (sample) value and the
known “Lab Val.” The entered lab value be-
comes the calibration value. Example: Suppose
the analyzer recorded a sample value of 6.80
pH but the grab sample lab value was deter-
mined to be 6.92 pH. Also, the actual process
value may have changed while determining the
sample value. You enter 6.92 pH to complete
calibration. The measured reading will change
to reflect the new calibration.
If the process pH has a tendency to change
rather quickly, it is very important that you take
the sample and simultaneously initiate the
analyzer to record the process pH value. Gen-
erally, the more time that elapses between
doing these two things, the more calibration er-
ror there will be.
6.
After keying in the known value, press the
ENTER key
to store the value and select the “CALIBRATE” line.
Press the
ENTER key
again to complete the calibra-
tion.
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