AMI Codes-II
Instrument Setup
A-96.250.571 / 050517 37
4.6. Calibration
1 Calibrate pH sensor (if option pH is installed).
See Standard pH, p. 52.
2 Perform process calibration.
See Process Calibration of DIS, p. 50
If ordered:
Calibration of
pH sensor
The instrument should be operating for 1h before performing a pH
calibration.
Program the two buffers you want to use for calibration (Installation/
Sensors/Standards). Calibrate the pH sensor with two buffers, e.g.
pH 7.00 and pH 9.00. See chapter Calibration, p. 50 for details.
Process DIS Let the instrument run for 1 h.
Use CHEMATEST 25 (or equivalent photometer) to determine the
sample disinfectant concentration. Take the sample directly from
the flow cell. Determine the sample disinfectant value by 3 manual
DPD measurements. Calculate the average value. Compare this
value to the value, indicated by the AMI.
Keep in mind the accuracy of your manual measurement. Only cor-
rect the instrument if the difference is significant.
Perform process DIS if necessary. See chapter Calibration, p. 50
for details.
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