Pyxis SP-210 - 7 Calibration; Bleach Calibration (Three-Point with Zero)

7 Calibraon
7.1 Bleach Calibraon (Three-Point with Zero)
The SP-210 is calibrated using a three-point calibraon, i.e., the zero-point is calibrated with deionized water
rst, and then the slope is calibrated using a concentraon of 1% and 10% sodium hypochlorite standard
soluon.
1. Rinse and ll the sample cell with deionized water.
*
NOTE
*
In case of emergency, you can use ”no sodium hypochlorite” clean sample
water, such as drink water, but please use deionized water to redo the zero calibraon
as soon as possible.
2. Power on the SP-210 by pressing
.
3. The SP-210 displays and measures the concentraon of bleach. If deionized water is used, the mea-
sured value will be very low; the value of sodium hypochlorite should be close to zero. A relavely
low non-zero reading (e.g., 0.01 etc.) is not a problem.
4. Press Cal/Sys ( ) to launch the Bleach CALIBRATION screen (Figure 3).
5. Press Zero (
) to set the zero point.
6. If the calibraon succeeds, a checkmark (
) and instrucons for the slope calibraon will appear
(Figure 4).
7. Rinse the sample cell three mes with the 1% sodium hypochlorite standard. Fill the sample cell with
the 1% standard.
8. Press Slope (
or ) to start the low-point slope calibraon.
9. If the calibraon succeeds, a checkmark (
) and a ”Calibraon Success” message will appear (Figure
5). Otherwise, a warning message is displayed.
10. Press Connue (
or ) to connue to the high-point slope calibraon (Figure 6).
11. Rinse the sample cell
three mes with the 10% sodium hypochlorite standard. Fill the sample cell
with the 10% standard.
12. Press Slope (
or ) to start the high-point slope calibraon.
13. If the calibraon succeeds, a checkmark (
) and a ”Calibraon Success” message will appear (Figure
7). Otherwise, a warning message is displayed.
14. Calibraon is now complete. Press Exit (
) to return to Bleach measurement mode.
*
NOTE
*
Aer calibraon is completed, the SP-210 will not automacally return to
Bleach measurement mode. If you press and hold Exit, the SP-210 will shut down
instead of returning to the measurement mode.
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