Swann AMI Codes-II CC Operator's Manual page 16

AMI Codes-II CC
Product Description
General
Time
sequence of an
overall
measurement
14
It is distinguished between two different kinds of measurement:
 Free available chlorine (fac) measurement
 Overall measurement including free available chlorine (fac),
total 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).
NOTICE: 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 mea-
surement 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-ener-
gized 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
"Oxycon 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 sam-
ple flow through the potometer is stopped. Immediately after that,
the tc 1 is measured.
The "calculated monochloramine" (cmc) is calculated and dis-
played.
After about 120 sec the tc 2 is measured and then the "calculated
dichloramine" (cdc) and the "calculated combined chlorine" (ccc)
are calculated and displayed.
After the measurement is finished, the solenoid valve [J] is de-ener-
gized and sample flows through the photometer and a flush time of
2 minutes follows.
A-96.250.581 / 220616