TCSMA Conductivity System
Part 6 - Calibration
O & M Manual
20
REV G, 7/2009
Due to the nature of the sensor design, it is
recommended to use the largest range possible for
the application. The higher instrument ranges are
easier to user calibrate, as they require less back-
and-forth zero/span adjustments.
6.25
Temperature
Compensation
Adjustment
The TC % PER C adjustment sets the specific linear
temperature compensation factor for the measured
solution. The range of adjustment is from 0-4%/C.
Since the majority of aqueous solutions are
compensated at approximately 2%/C, leave this
setting at the default 2%/C setting if the exact
compensation requirement is not known. The
following list contains some common factor settings:
1.9
Sodium
Hydroxide
1.5
Hydrochloric
Acid
1.5
Sulfuric
Acid
1.5
Nitric
Acid
1.1
Phosphoric
Acid
2.1
Sodium
Chloride
2.4
Sodium
Sulfate
2.2
Sodium
Nitrate
2.0
Potassium
Chloride
6.26
REV/DIR
Switch
This switch sets the direction of output change for the
system. In the direct mode (DIR), the output current
will increase to 20 mA as the conductivity increases.
In the reverse mode (REV), the output current will
decrease to 4 mA as conductivity increases.
6.27
Loop
Current
This indicator glows when the transmitter is powered
and operating correctly. The intensity of the light will
increase with increasing output current.
6.28
Cell
Drive
This switch sets the sensor drive potential and is used
to set the instrument range of operation (see section
6.24.)
