Pyxis 50352, Руководство пользователя

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Figure 25. Figure 26.
7.4.2 Blank (Zero) Calibration
The TMB Chlorine method has a non-zero intercept value in the calibration equation. A proper non-zero
intercept value has been calibrated prior to shipping. The following steps are used to carry out a reagent
blank calibration which changes this non-zero intercept value:
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 27).
4. Rinse the main module sample cell three times with deionized (DI) water. Fill the sample cell with DI
water.
5. Press Zero ( ). ZERO will appear on the top-left corner of the display (Figure 28).
6. Prepare the developed blank-zero sample:
(a) Add 3 drops of Free or Total Chlorine reagent into the sample cell (Figure 29).
(b) Draw out the DI 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.
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 30). If the real-time readings remain steady, press Stop ( ) to stop measurement timer
early or wait for the 2-minute timer to end.
9. Press Cal ( ) to launch the CHLORINE CALIBRATION screen (Figure 31).
10. Press Blank ( ) to start blank calibration.
11. The message “ Blank calibration success ” will appear on the bottom of the display (Figure 32).
12. Calibration is now complete. Long press Default ( )to return to the CHLORINE MEASUREMENT
screen.
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