Instruction manual

15
4 CALIBRATION MODE
4.1 About Calibration
Calibration should be carried out each time a new electrode is attached to the
controller or when you suspect that the controller/electrode is out of calibration. The
controller allows you to perform temperature calibration and conductivity calibration.
About Temperature Calibration
It is important to ensure that temperature calibration is carried out prior to
conductivity calibration since temperature readings affect the accuracy of
conductivity measurements. It is recommended that temperature calibration should
be carried out only if the temperature value displayed on the controller is different
from that of a calibrated thermometer. A temperature offset calibration of ± 10 °C/±
18 °F from the default reading is allowed. Once a temperature calibration is
performed, conductivity calibration should be carried out to ensure the accuracy of
conductivity measurements.
About Measuring Ranges & Conductivity Calibration
The controller has six selectable conductivity measuring ranges. You can only
calibrate one-point in the measuring range that you have selected for your process
application. You have to recalibrate the controller every time you change the
measuring range since the calibration data of the controller will be reset every time
a new measuring range is selected.
About Conductivity Calibration
During conductivity calibration, the controller allows a calibration window of ± 40%
from the measured default reading of the calibration standard. The minimum
allowable calibration point is 10% of the full scale reading of the measuring range
selected.
For best results, select a standard conductivity solution close to the sample value
you are measuring.