PART THREE - OPERATION
SECTION 4 - TRANSMITTER CALIBRATION
PRO-series Model E3 Electrodeless Conductivity Transmitter
6
4.4 % Concentration
Calibration
CONC CAL Method
actual typical process value, press
ENTER key
again to
return the analog output to its active state (MEASURE
screen appears).
This completes SAMPLE CAL calibration.
After zeroing the sensor (first-time sensor calibration only),
calibrate the sensor span using one of these methods:
•
CONC CAL Method:
This method requires you to im-
merse the sensor into a prepared % concentration
reference solution of known value, or to keep the sen-
sor installed in the process while obtaining a process
sample. When keeping the sensor installed, determine
the process value by laboratory analysis or comparison
reading. In either case, enter the known reference solu-
tion or sample % concentration value.
•
COND CAL Method:
This method requires removing
the sensor from the process, immersing it into a con-
ductivity reference solution, entering a reference for
temperature compensation temperature, and entering
the known linear % per
°
C slope and conductivity value
of the reference solution. The conductivity reference
solution should have an equivalent, uncompensated
value that corresponds with the normal % concentration
value of the process.
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 Immersing Sensor in Reference Solution:
A. Prepare a % concentration reference solution
using your normal method.
To achieve accu-
rate calibration, the reference solution must
have the same chemical composition as the
process.
Also, its value should be near the
typical measured process value.
