Eagle Microsystems RA1000 - Manual (Page 7)

7
ANALYZER RANGE
10 grams for 0.5 mg/l
40 grams for 2.0 mg/l
60 grams for 3.0 mg/l
100 grams for 5.0, 10, 20 and 30 mg/l
c. Shake until crystals are completely dissolved.
d. Fill bottle to the top with distilled/deionized water; shake again.
Pour contents into the reagent bottle through a fine strainer. The
bottle will provide approximately a one week supply of reagent.
B. Carbon Dioxide Gas
When using carbon dioxide for pH buffering, a carbon dioxide gas flow
rate of 200 cc per minute is required. For free chlorine measurement,
carbon dioxide is used alone, and replaces the liquid buffer . When
measuring total chlorine using carbon dioxide, it is necessary to add
potassium iodide solution in the quantities listed above, 2.b., to de-
ionized water alone.
NOTE: For Chlorine Dioxide and Potassium Permanganate consult
factory.
V I . START-UP
A. Hold filled reagent bottle upright and pull the tapered plug upward until
the hole in cap is plugged. Turn bottle upside down and install into
reagent feeder body. The weight of the reagent bottle opens the
tapered plug and the bottle will rest on the o-ring on top of the feeder
body.
B. Start water sample flow at approximately 500 cc/minute . To drain, water
must be flowing over the overflow weir in the sample filter chamber.
The sample must be supplied continuously for reliable operation. If the
system requires occasional sample cutoff, provisions must be made to
keep the electrodes wet.
Sampling from a pressurized source may require a pressure regulating
valve to hold the flow constant. Maximum desired pressure: 5 psig (0.3
bar).
If sampling from sewage, a flushing “Y” strainer is necessary to prevent
sample line from plugging. Other types of filters are not recommended.
C. Turn the power on to the analyzer.
D. If air bubbles are present in the reagent or flow tubing, remove by
squeezing or tapping tubing or disconnecting tubing at the analyzer and
flushing momentarily.