52
DC80
S
TART
U
P
P
ROCEDURES
Complete all Installation steps in
Section 2
INSTALLATION. This includes mounting the panel, supplying power,
wiring the outputs and filling and installing the sensors. The DC80 was calibrated at the factory before shipping
as described in
Section 4.2
.
The Chlorine dosing pump is designed to supply approximately 5 ppm of chlorine to the measurement system
using a 10:1 dilution of standard household bleach, 6-8% sodium hypochlorite. The peristaltic pump speed is
scaled 0-100 with 40-50 providing the optimal speed to supply 5 ppm. The speed setting of 50 uses 1 liter of
diluted chlorine solution per day. That equates to 3 days and 21 hours per gallon of solution, 5 gallons is 19 days.
Dilute a volume of bleach and place it in an opaque plastic container. Protect the diluted solution from light.
Light degrades chlorine, turning it into sodium chloride. Insert the 4mm (0.167”) tubing from the peristaltic
pump into the bleach solution. It is best to drill a hole in the containers cap slightly larger than 4mm to keep the
tubing in place and to allow air to enter as the solution is pumped out.
Supply
chlorinated
water to the TC80 and allow the reading to stabilize for at least 2 hours. The analyzer should
display some non-zero value, 1-3 ppm is a good range. When the reading has stabilized record the reading and
start the chlorine feed by setting the pump speed to 50. It will take a minute or two for the chlorine to reach the
injection point. The reading will jump up to around 5 ppm + the 1-3 ppm background value. Adjust the pump
speed to generate a chlorine level exactly 5 ppm higher than the background value.
Remove the chlorinated sample stream from the TC80 and connect the dechlorinated water to the Constant
Head Flow Controller. The Analyzer will display a value near 5 ppm, higher if chlorine is present in the sample
stream or lower if sulfite is in excess.
To use the OFFSET feature go to MENU > CONFIG > MORE > OFFSET. Enter
-5 ppm
or negative whatever ppm
value you are adding, press OK > HOME > EXIT > SAVE > YES. The analyzer will now display 0.00 ppm plus any
chlorine present or –X.XX ppm if the reducing agent (sulfite) is in excess.