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Calibration / Adjustment
Automatic Calibration with Standard Calibration Solution
Automatic with Standard Calibration Solution
For automatic calibration, the conductivity sensor is immersed in a standard
calibration solution (NaCl or KCl, selected during parameter setting).
From the measured conductance and temperature, the Protos automatically
calculates the cell factor.
The temperature dependence of the calibration solution is taken into account.
During calibration the module is in HOLD mode.
Current outputs and relay contacts of the module behave as configured
(Module BASE).
NOTICE!
• Use fresh calibration solutions only!
• The calibration solution used must have been selected during parameter set-
ting.
• Calibration accuracy decisively depends on the exact detection of the cali-
bration solution’s temperature. Using the measured or entered temperature,
the Protos determines the nominal value for the calibration solution from a
stored table.
• Observe response time of temperature probe!
• For exact determination of the cell factor, wait until the temperature probe
and calibration solution have the same temperature.
Be sure to observe during calibration:
• If the measured conductance or the measured temperature fluctuate greatly,
the calibration procedure is aborted after 2 min.
• If an error message appears, you have to repeat calibration.
Adjustment: Taking over the values determined by calibration
• When the values determined by calibration are correct, they must be taken
over to adjust the analyzer.
Automatic calibration
