Product Calibration - Burkert 8285 El. COND Mode D'emploi

Product calibration

Calibration / adjustment
Product calibration
Product calibration
When the sensor cannot be removed, e.g. for sterility reasons (for biotechni-
cal processes), its cell constant can be determined with "sampling".
To do so, the currently measured process value is stored by the analyzer.
Immediately afterwards, you take a sample from the process. The sample
value should be measured at process conditions (same temperature!). The
determined value is entered in the measuring system. From the difference
between process value and sample value, the analyzer calculates the cell
constant of the conductivity sensor.
During calibration the analyzer is in function check mode.
Current outputs and relay contacts behave as configured.
Product calibration without TC correction
Take a sample from the process. Measure its value at the temperature at
which the sample has been taken ("Sample temp", see display). To do so,
it may be necessary to thermostat the sample correspondingly in the lab.
Temperature compensation must be turned off at the comparison meters
(TC = 0 %/K).
Product calibration with TC correction T = 25 °C
ref
Take a sample from the process. When measuring in the lab (TC linear), be
sure that the same values are set for reference temperature and temperature
coefficient in the comparison meter and in the analyzer. Furthermore, the
measuring temperature should correspond to the sample temperature
(see display). Transport the sample in an insulated container (Dewar).
Caution!
Product calibration can only be performed if the process medium is stable
(no chemical reactions which have an effect on the conductivity). At higher
temperatures, the sample values can also be invalidated due to evaporation.
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