Hydro Instruments 210 Series, Инструкция по эксплуатации

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IV. SETUP, REAGENTS, & CONDITIONING THE ANALYZER
IMPORTANT NOTE: Prior to starting the analyzer, turn the striker with your thumb (from left to right) to
be sure the motor turns freely. If the motor becomes stuck or is diffi
cult to turn by hand, the problem
must be identifi ed and corrected prior to starting the analyzer. See Section X (Troubleshooting).
1. Reagent Chemical Setup and Requirements: This section pertains to systems using the reagent
feed system. The following explains what reagents are to be used depending on the measurement
method.
a. Free Chlorine with pH compensation in software – No reagents required.
b. Free Chlorine without pH compensation – Requires pH buff er solution.
c. Total Chlorine – Requires pH buff er and potassium iodide.
d. Chlorine Dioxide – Requires pH buff er and glycine.
e. Bromine Chloride – Requires pH buff er and potassium iodide.
f. Iodine – Requires pH buff er.
NOTE: The 2 liter reagent bottle will last for approximately one week of continuous use.
Use of pH bu ff er: It should be noted that the pH buff er feed system is designed to reduce pH in the
sample cell in order to minimize or eliminate the eff ects of dissociation.
The following pH buff er is recommended:
Sodium acetate trihydrate and glacial acetic acid can be mixed with distilled deionized water as
follows:
a. Add 850 mL of distilled deionized water to a 1 ⁄
2
gallon (2L) bottle.
b. Add 486 grams sodium acetate trihydrate crystals and mix until all the crystals are dissolved.
c. Add 952 grams or 907 mL of glacial acetic acid to the bottle.
d. Fill the bottle to the top with distilled deionized water. Mix thoroughly.
e. If necessary check the pH of the solution (pH = 4). If not, add more acetic acid to lower the pH.
f. To conserve buff er you may also dilute 50:50 with distilled deionized water in a separate 1 ⁄
2
gal (2 L)
container and store the remaining solution for later use. However, please be aware that doing this
will lower the buff ering capacity of the solution.
Use of Potassium Iodide reagent: This reagent is always used together with the above mentioned
pH buff ers. To prepare the combined reagent solution, follow this procedure:
a. Fill a 1⁄2 gallon (2 L) bottle half way with distilled deionized water.
b. Add potassium iodide crystals as follows to the 1⁄2 gallon bottle.
c. Shake the bottle until the crystals are all dissolved completely.
d. Fill the
1
⁄2 gallon bottle to the top with the pH buff er solution.
TABLE 1
Potassium Iodide (KI) (grams) Analyzer Range (ppm) (mg/l)
2.65 0 to 0.2
5.3 0 to 0.5
21 0 to 2.0
32 0 to 3.0
53 0 to 5.0
105 10 or 20
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