AMI Codes-II CC
Maintenance
A-96.250.581 / 220616
51
6.5.
Calibration
Process
Calibration
of tc & fc
Let the instrument run for 1 h.
NOTICE:
Perform process calibration for free chlorine or total
residual chlorine only if:
• the sample concentration is close to the desired process
value (stable value).
• you are sure that the reagents are mixed completely and
correctly.
• if the difference to the manual measurement is significant.
• Keep in mind the accuracy of your manual measurement.
Use CHEMATEST 25 (or equivalent photometer) to determine the
sample disinfectant concentration. Determine the sample disinfec-
tant value by 3 manual DPD measurements. Take the sample direct
form the constant head. Calculate the average value. Compare this
value to the value, indicated by the AMI transmitter. Keep in mind
the accuracy of your manual measurement. Only correct the instru-
ment if the difference is significant.
Possible error messages see
Enter the correct value
with the [
] or [
]
key.
Press 3 x [Exit]
3.1.1
Total chlorine 2
Free av. chlorine
Calibration
Process pH
Standard pH
Enter
3.1.1.4
Free av. chlorine
Current Value
x.xx ppm
Slope
x.xxx
Save
<Enter>
Process Value
x.xx ppm
3.1.1.4
Free av. chlorine
Current Value
x.xx ppm
Slope
x.xxx
Save
<Enter>
Process Value
x.xx ppm
3.1.1.5
Free av. chlorine
Current Value
x.xx ppm
Slope
x.xxx
Calibration Successful