PART THREE - OPERATION
SECTION 5 - ANALYZER CALIBRATION
Rev. 6-501
Model P53 pH/ORP Analyzer (universal-mount 1/2 DIN)
65
1 POINT SAMPLE Method
Differential sensor and the slope remains low, replace
the salt bridge and standard cell solution (see sensor
instruction manual for details). If using a conventional
combination electrode, consider replacing it.
16. Press
ENTER key
to end calibration (“2 POINT
SAMPLE: CONFIRM CAL OK?” screen appears).
17. Re-install the sensor into the process.
18. Press
ENTER key
to display the active measurement
reading on the “2 POINT SAMPLE: CONFIRM ACTIVE?”
output status screen. When the reading corresponds to
the actual typical process value, press
ENTER key
again to return the analog outputs and relays to their
active states (MEASURE screen appears).
This completes “2 POINT SAMPLE” calibration.
This method is similar to the 2 POINT SAMPLE method ex-
cept that only one sample (or buffer) is used to calibrate
one point. This method requires you to enter the known pH
value of the sample (or pH buffer). Determine the sample
value using laboratory analysis or a comparison reading.
1.
Immerse the sensor in the sample (or buffer).
Impor-
tant: Allow the sensor and sample temperatures to
equalize.
Depending on their temperature differences,
this may take 30 minutes or more.
2.
Press
MENU key
to display
&21),*85(
7(670$,17
(;,7
.
3.
With the “CALIBRATE” line selected, press
ENTER key
to display
.
4.
With the “SENSOR” line selected, press
ENTER key
to
display
.
