HF scientific Chlorine Dioxide Pocket Photometer Field Portable - Manual (Page 9)

24055 (1/09)
Rev. 1.1
5
3.0 Normal Operation
This instrument allows you to measure the concentration of chlorine dioxide in a grab
sample of water. Readings are reported in milligrams per liter mg/l which are numerically
equivalent to parts per million (PPM). The stated range of the instrument is 0-6 mg/l
within the stated accuracy; however, the instrument will trend or read to 10 mg/l.
During normal operation, the instrument will display a variety of signals.
After Pressing ON/OFF Button
After Pressing Zero Button
3.1 Routine Measurement
The instrument measures and reports the concentration of chlorine dioxide of a sample in
milligrams per liter (mg/l).
Note: Milligrams per liter (mg/l) are numerically equivalent to parts per million (PPM).
1. Turn on the instrument by pressing the ON/OFF button continuously for 1 second
until the display light up.
STEP 1-ZERO the instrument
a. Rinse a sample cuvette tree times with a sample of the water to be measured. After
rinsing, fill the cuvette to within ½” of the top. Do not overfill. Wipe off any water
making sure that the sides and bottom of the cuvette are dry and that the optical sides
are clean.
b. Place the cuvette in the optical well with one of the clear optical sides facing the
indicating arrow.
c. Press the ZERO button.
STEP 2 – Add Glycine Reagent to the sample
a. Remove the cuvette with the sample from the instrument.
b. Add 4 drops of Glycine reagent to the sample cuvette.
c. Cap and invert to mix.
STEP 3 – Add DPD Reagent