Thermo Scientific ALPHA COND 550, Manual

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Instruction Manual
Alpha-
COND 550
14
4. Calibration Mode
4.1 About Calibration
Calibration should be carried out each time a new electrode is attached to the
monitor or when you suspect that the monitor/electrode is out of calibration.
The monitor 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 monitor
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 monitor has five 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 monitor every time you
change the measuring range since the calibration data of the monitor will be
reset every time a new measuring range is selected.
About Conductivity Calibration
During conductivity calibration, the monitor 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.