PART THREE - OPERATION
SECTION 5 - ANALYZER CALIBRATION
Rev. 6-501
Model P53 pH/ORP Analyzer (universal-mount 1/2 DIN)
67
5.3 ORP Calibration
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instruction manual for details). If using a conventional
combination electrode, consider replacing it.
11. Press
ENTER key
to end calibration (“1 POINT
SAMPLE: CONFIRM CAL OK?” screen appears).
12. Re-install the sensor into the process.
13. Press
ENTER key
to display the active measurement
reading on the “1 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 “1 POINT SAMPLE” calibration.
Calibrate for ORP measurement using only this “1 POINT
SAMPLE” method.
CAUTION:
WHEN USING A NEW SENSOR OR REPLACING THE
SALT BRIDGE AND STANDARD CELL SOLUTION
ON AN EXISTING SENSOR, ALWAYS PERFORM A
“RESET CAL” USING THE TEST/MAINT MENU (PART
THREE, SECTION 6.10) BEFORE CALIBRATING.
NOTE:
A two-point calibration method is purposely ex-
cluded since it could provide bad results. Immersing
the sensor into one reference solution and then into
the other could contaminate electrochemical com-
ponents of the sensor.
This method requires you to enter the known mV value of a
sample (or reference solution). Determine the sample mV
value using laboratory analysis or a comparison reading.
1.
Immerse the sensor in the sample (or reference solution).
