Swan Analytical Instruments AMI Codes-II CC Operator's Manual page 16

AMI Codes-II CC
Product Description
General
Time
sequence of an
overall
measurement
16
Two different types of measurements are distinguished:
 Free available chlorine (fac) measurement
 Overall measurement including free available chlorine (fac), to-
tal chlorine 1 (tc1) and total chlorine 2 (tc2).
The Interval fac and the Interval tc2 can be set individually:
 Interval fac between 0 and 12 min.
 Interval tc2 between 0 and 60 min (overall measurement).
Note: If the fac interval is set to zero, it is nevertheless measured
in the overall measurement.
The default setting for fac measurement interval is 5 min and for
overall measurement interval 20 min.
The blue bar represents the sample flow through the photometer. At
the beginning the solenoid valve [J] is de-energized and the sample
flows through the photometer. A short time before the measurement
starts, a zero point measurement is performed. Then the peristaltic
pump starts and a small portion of the reagents "Oxycon on-line
DPD" and "OXYCON ON-LINE Buffer" is pumped into the mixing
chamber. During this time, the solenoid valve [G] is de-energized
and the "Oxycon On-line KI" circulates between the peristaltic pump
and the valve block.
A short time after, if the mixture is in the photometer, the free avail-
able chlorine (fac) of the sample is measured.
After about 25 sec the peristaltic pump starts again. Now the sole-
noid valve [G] is energized and a small portion of the reagents "Oxy-
con on-line DPD", "OXYCON ON-LINE Buffer" and "Oxycon On-line
KI" is pumped into the mixing chamber.
A short time after, the solenoid valve [J] is energized and the sample
flow through the potometer is stopped. Immediately after that, the tc
1 is measured.
The "calculated monochloramine" (cmc) is calculated and displayed.
After about 120 sec the tc 2 is measured and then the "calculated di-
chloramine" (cdc) and the "calculated combined chlorine" (ccc) are
calculated and displayed. After the measurement is finished, the so-
lenoid valve [J] is de-energized and sample flows through the pho-
tometer and a flush time of 2 minutes follows.
A-96.250.581 / 181120