15
Low range, direct reading chlorine dioxide, 0 to 35.0 ppm
The maximum absorption bank of aqueous chlorine dioxide is around 360nm. The SP-800 has a 365nm
UV LED and can be used to directly measure chlorine dioxide. It offers a much lower detection limit (0.2
ppm) than direct methods available from other portable colorimeters having only light sources in the visible
range.
Select ClO2D in the method selection page and carry out the following steps to measure chlorine dioxide:
1. Place a vial filled with deionized water into the vial compartment and press the ZERO button
to zero the SP-800.
2. Discard the deionized water and fill the same vial with the sample. Place the vial into the vial
compartment and press READ button to read. The measured chlorine dioxide concentration
will be displayed in the top of the method page.
Turbidimetric Anionic Polymer Method
1. Add polymer reagent 1 to 10 ml sample and inverse the sample vial 5 times to mix the reagent
with the sample. Place the sample via to the sample vial compartment.
2. Press on ZERO.
3. Add polymer reagent 2 and press on TMR1 to start the five minutes timer.
4. Gently inverse the sample via for 10 times and place the sample vial to the sample vial
compartment.
5. Polymer concentration will be measured and displayed when the five-minute timer is reached.
The polymer concentration is shown as ppm PAA (polyacrylic acid) equivalent.
Direct Reading Bleach Percent Method, 0 to 15%
The SP-800 has a 365nm UV LED and other deep blue LEDs that can be used to directly measure bleach
concentration in the range of 0 to 15%. No reagent is required for the method and the displayed result is
the sodium hypochlorite concentration in percentage.
Select BLCH in the method selection page and carry out the following steps:
1. Place a vial filled with deionized water into the vial compartment and press the ZERO button
to zero the SP-800.
2. Discard the deionized water and fill the same vial with the bleach sample. Place the vial into
the vial compartment and press READ button to read. The measured bleach concentration will
be displayed in the top of the method page.
3.8 Method Setup and Calibration
Press the SETUP button in the method result page to launch the method setup and calibration page.
Set up the method parameters
Press the FORM button to select a concentration form from the list of forms that are available for this specific
method (Figure 10).
Press the UNIT button to select a concentration unit among the list of ppb, ppm, mg/L, ug/L and No Unit
(Figure 11).
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