Calibration - Swan Analytical Instruments AMI Codes-II O3 Operator's Manual

AMI Codes-II O3
Maintenance
6.5.
Process
Calibration of
DIS
Zero
50

Calibration

Note: Perform process calibration 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
A process calibration is only possible with a process value higher
than 10 ppb ozone. Please note that due to the low stability of the
ozone, a process calibration with an elevated concentration is pre-
ferred.
Use CHEMATEST (or equivalent photometer) to determine the sam-
ple disinfectant concentration. Determine the sample disinfectant
value by 3 manual DPD measurements. Calculate the average val-
ue. Compare this value to the value indicated by the AMI.
Enter process value (0.050 mg/l = 50 ppb) under menu
for Process DIS
Possible error message see
A zero is automatically done before each measurement.
Error List, p. 59.
3.1.1, p. 71
A-96.250.881 / 070622