7.4.3
Slope Calibration using Pyxis TMB Chlorine Secondary Standard
The TMB Chlorine method has been calibrated prior to shipping; there is no need to calibrate unless a cali-
bration check (see the
Calibration Check using Pyxis TMB Chlorine Secondary Standard
section) indicates
that the method needs to be re-calibrated. The following steps are used to carry out a slope calibration
using the Pyxis TMB Chlorine Secondary Standard 1.0 ppm:
*
NOTE
*
It is recommended to have a chlorine concentration between 0.33 ppm and 2.2
ppm.
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 33).
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 34).
6. Rinse the sample cell three times with Pyxis TMB Chlorine Secondary Standard. Fill the sample cell
with the standard.
7. Press
Read
(
).
8. Press
Cal
(
) to launch the
CHLORINE CALIBRATION
screen (Figure 35).
9. Press
Slope
(
).
10. Use
+
(
) and
-
(
) to adjust the chlorine concentration to the value of 1.00 ppm (Figure 36).
11. Press
Calib
(
) to start slope calibration.
12. The message “
Slope calibration success
” will appear on the bottom of the display (Figure 37).
13. Calibration is now complete. Long press
Calib
(
) to return to the
CHLORINE MEASUREMENT
screen.
Figure 33.
Figure 34.
Figure 35.
SP-710 User Manual
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