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

3.0 Normal Operation
This instrument allows you to measure the concentration of free or total chlorine 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 free or total chlorine 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 Reagent to the sample
a. Remove the cuvette with the sample from the instrument.
b. Invert the PPD-2 Powder Pop Dispenser and shake gently to ensure that the proper
amount of reagent is available. Remove the “snap cap” from the Dispenser bottom;
place the Dispenser over the top of cuvette. Fully and firmly, depress the Dispenser
21885 (1/09)
Rev. 1.7
5