Pyxis SP-710B, User Manual

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7 Calibration
7.1 PTSA Calibration (Two-Point with Zero)
1. Rinse the main module sample cell three times with DI water. Fill the sample cell with DI water.
*
NOTE
*
In emergency, “non-PTSA” water, such as city water, may be used, but re-
calibrate using DI water for the zero step as soon as it is available.
2. Power on the SP-710B by pressing . Allow 5–10 seconds for the SP-710B to stabilize.
3. The unit is actively reading and displaying both PTSA and Conductivity. The values will be very low if
DI water is used; conductivity value is not critical but PTSA value should be near zero. A low non-zero
value (e.g. 0.2 or 0.4, etc.) is not problematic.
4. Press Calib ( ) as needed to highlight PTSA in the selection menu.
5. Press to launch the PTSA CALIBRATION screen (Figure 10).
6. Press Zero ( ) to start the zero (blank) calibration.
7. If the calibration succeeds, a checkmark ( ) and instructions for the slope calibration will appear
(Figure 11).
8. Rinse the main module sample cell three times with the desired PTSA standard. Fill the sample cell
with the desired PTSA standard.
9. Press Cycle ( ) to cycle between the PTSA standards 100, 200, and 300 ppb (it repeats). Ensure
the value selected matches the desired PSTA standard in the sample cell.
10. Press Slope ( ) to start the slope calibration.
11. If the calibration succeeds, a checkmark ( ), a ” Calibration Success ” message will appear (Figure
12). Otherwise, a warning message is displayed.
12. Calibration is now complete. Press Exit ( ) to return to measurement mode.
*
NOTE
*
If Exit is pressed before the second checkmark appears, the calibration will
not be completed and must be re-done.
Figure 10. Figure 11. Figure 12.
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