Correction Of Trides Sensor - Swann AMI Trides Operator's Manual

AMI Trides
Instrument Setup
4.4.
36

Correction of Trides sensor

If you measure concentrations > 0.1 ppm chlorine or 0.01 ppm
ozone correct the instrument after 24 h running-in. A zero point cal-
ibration is not necessary.
The standard method to correct the AMI Trides sensor is the DPD
photometric method. Use a high quality photometer (e.g. Swan
Chematest), to determine the reference value. Perform 3 manual
measurements and calculate the average value.
The manual sample must be taken from the grab sample outlet of
the flow cell.
If you measure concentrations < 0.1 ppm chlorine or 0.01 ppm
ozone, let the instrument run continuously for at least 5 days in nor-
mal operation before performing a zero point calibration!
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