78
8.19. COLOR OF WATER
SPECIFICATIONS
Range 0 to 500 PCU (Platinum Cobalt Units)
Resolution 1 PCU
Accuracy ±10 PCU ±5% of reading at 25 °C
Light Source LED with narrow band interference filter @ 420 nm
Method Adaptation of the Standard Methods for the Examination of Water and
Wastewater, 18th edition, Colorimetric Platinum Cobalt method.
REQUIRED ACCESSORIES
0.45 µm membrane for true color measurement.
For other accessories see page 200.
MEASUREMENT PROCEDURE
• Select the Color of Water method using the procedure described in
the Method Selection section (see page 18).
• Fill the first cuvette (#1) up to the mark with deionized water and
replace the cap.
• Place the blank (#1) into the holder and close the lid.
• Press the Zero key. The display will show “‑0.0‑” when the meter is zeroed and ready for
measurement.
• Remove the cuvette
10 mL
#1
#1
COLOR OF WATER
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