Calibrating An Analogue Input, Ai1 Or Ai 2, At 1 Point (Slope): Example With The Chlorine Sensor Type 8232 - Burkert 8619 Operating Instructions Manual

Type 8619
Calibration menu
10.10 Calibrating an analogue input, AI1 or AI 2, at 1 point
(slope): example with the chlorine sensor Type 8232
This function is used to determine the slope of the straight line of the measurement signal.
Refer to section 8.10 to access the "Calibration" menu.
→ Install the chlorine sensor in the process with respect to the related Operating instructions.
→ Connect the chlorine sensor to an analogue input, AI1 or AI2.
Calibration Mx:Inputs
1)
A warning/error message signals a slope < 25 % or > 400 %.
• Replace the electrolyte and/or the membrane.
Fig. 99: Example for the calibration of an analogue input with respect to the chlorine measured by an instrument
having a 4...20 mA output
AI1/AI2 Mode:general
Mode:chlorine
→ Activate the 1-point calibration function: The device saves the
current value on the analogue input.
→ The device shows the measured value of chlorine.
→ Take a sample of the solution to be measured.
→ With the DPD1 method, determine the chlorine concentration of
the sample.
OK
1st point
4.50 ppm
5.00 ppm
→ Enter the value of the chlorine concentration of the sample, that
has been determined with the DPD1 method.
OK
Calibration result
Slope:0.876 mA/ppm
SAVE
The device associates the calculated slope with the analogue input
signal selected 1)
PV Slope Calibration
Solution measured value.
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