PART THREE - OPERATION
SECTION 5 - ANALYZER CALIBRATION
Rev. 5-1000
Model C53 Conductivity Analyzer (universal-mount 1/2 DIN)
67
5.4 1 POINT SAMPLE
Method
(wet calibration)
4.
After the
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screen re-appears, press
MENU key
once and then
ESC key
once to display the
MEASURE screen.
This completes GLI’s DRY-CAL calibration.
This “wet” calibration method requires you to immerse the
sensor into a properly prepared conductivity reference solu-
tion of known value, or to keep the sensor installed in the
process while obtaining a process sample. When keeping
the sensor installed, determine the process value by labo-
ratory analysis or comparison reading. In either case, enter
the known reference solution or sample conductivity value.
1.
Depending on the situation, do one of the following:
When Keeping Sensor Installed:
Obtain a sample of the process solution and deter-
mine its value using laboratory analysis or a
recently calibrated portable meter.
When Using a Reference Solution:
A. Prepare a conductivity reference solution using
your normal method. Its value should be near
the typical measured process value for best
accuracy. When the value is relatively low
(between 200 and 100,000 microSiemens/cm),
you may want to use the data in Table D to
prepare the reference solution. Add the listed
grams of pure, dried NaCl to one liter of high
purity, de-ionized, CO
2
-free water that is 25
°
C
to obtain the listed conductivity. Solution con-
ductivity can be decreased by dilution with de-
ionized water.
