Thermo Fisher Scientific Alpha COND 500 - Manual (Page 15)

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5.2 Temperature Calibration
You need to perform temperature calibration if your transmitter temperature reading
is inaccurate or if the transmitter’s cell constant setting is changed. It is because the
transmitter’s temperature offset calibration will be erased once a new cell constant
is selected.
It is important to ensure that temperature calibration is carried out first prior to
conductivity calibration since temperature readings affect the accuracy of
conductivity measurements. Your transmitter allows a one point temperature
calibration using reference of a thermometer known to be accurate. Please refer to
Section 6.2 - Temperature Compensation Setting for temperature calibration
procedure.