Electro-Chemical Devices (ECD) HCA1 - Manual (Page 9)

(in sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing
and Reading the sample.
7. The cursor will move across the display while the meter prepares to measure
the sample. Record result displayed (this result is automatically stored in O3
Menu). After testing is completed, rinse cell immediately.
MENU Cd4 Chlorine Dioxide Test Procedure
1. Remove (1) Micro Strip Cd (DPD-1) and (1) Micro Glycine Strip from the
bottles before beginning the test. Place them in a dry convenient place and
recap the test strip bottles.
2. Press the ZERO/ON button to power the meter on; the display will show all
annunciators, then the current MENU selection, followed by the last reading.
3. Press and re-press the MENU button until the display shows the parameter
Cd4.
4. Rinse the CELL at least 3 times with the water sample you will be testing -
rinsing minimizes the potential for cross contamination from a previous test.
Finally, fill cell to capacity (4mL) with the water sample.
5. Dip the Micro Glycine Strip into the CELL and immediately press READ. This
starts the 20 SECOND countdown timer. During this time move the strip in a
gentle back and forth motion (approx. 2 strokes/Sec). Remove and discard the
strip after “1” on the display disappears. The cursor will move across the
display while the meter prepares to measure the sample. Ignore the result.
6. Press the ZERO/ON button. The cursor will move across the display followed
by 0.00 PPM. Sample is ready for testing.
7. Dip the HCA1 Micro Strip Cd (DPD-1) into the CELL and immediately press
READ. This starts the 20 SECOND countdown timer. During this time move the
strip in a gentle back and forth motion (approx. 2 strokes/Sec). Remove and
discard the strip after “1” on the display disappears. When testing outdoors
(in sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing
and Reading the sample.
8. The cursor will move across the display while the meter prepares to measure
the sample. Record result displayed (this result is automatically stored in Cd4
Menu). After testing is completed, rinse cell immediately.
MENU PA5 Peracetic Acid Test Procedure
1. Remove (1) Micro PA (DPD-4) Strip from the bottle before beginning the test.
Place it in a dry convenient place and recap the test strip bottle.
2. Press the ZERO/ON button to power the meter on; the display will show all
annunciators, then the current MENU selection, followed by the last reading.
3. Press and re-press the MENU button until the display shows the parameter
PA5.
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