6.2.1
Measurement Procedure
Follow the steps below to measure free and total chlorine:
1. Power on the SP-710 by pressing
. Allow 5–10 seconds for the SP-710 to stabilize.
2. Press
Measure
(
) as needed to highlight
Chlorine
in the selection menu.
3. Press
to launch the
CHLORINE MEASUREMENT
screen (Figure 7).
4. Rinse the main module sample cell three times with the sample to be tested. Fill the sample cell with
the sample.
5. Press
Zero
(
).
ZERO
will then appear on the top-left corner of the display (Figure 8).
6. Prepare the developed sample:
(a) Add 3 drops of Free or Total Chlorine reagent into the sample cell (Figure 9).
(b) Draw out the sample water and reagent from the sample cell using the disposable pipette to
provide mixing.
(c) Once the sample has been drawn into the reagent pipette, shake the pipette or squeeze the
sample back into the sample cell allowing the reagent to fully dissolve. A yellow color should
develop if chlorine is present.
7. Press
Timer
(
). A 2-minute timer will begin.
8. The SP-710 will continuously display the free or total chlorine concentration as the timer counts down
(Figure 10). If the real-time readings remain steady, press
Stop
(
) to stop measurement timer
early or wait for the 2-minute timer to end.
9. Record the final value as ppm Free or Total Chlorine.
Figure 7.
Figure 8.
SP-710 User Manual
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