Hach NA5600 sc Na+ Mode D'emploi page 25

1. Prepare 500 mL of 1-g/L Na calibration standard as follows:
a. Rinse the volumetric flask with ultra pure water three times.
b. Add 1.272 g NaCl to the volumetric flask.
c. Add 100 mL of ultra pure water to the volumetric flask.
d. Shake the volumetric flask until the powder is fully dissolved.
e. Add ultra pure water to the 500-mL mark.
f. Shake the volumetric flask to fully mix the solution.
2. Prepare 500 mL of 100-ppm Na calibration standard as follows:
a. Rinse the other volumetric flask with ultra pure water three times.
b. Use a pipet to add 5 mL of the 1-g/L Na standard to the volumetric flask. Put the pipet in the
flask to add the solution.
c. Add ultra pure water to the 500-mL mark.
d. Shake the volumetric flask to fully mix the solution.
3. Prepare 500 mL of 100-ppb Na calibration standard as follows:
a. Rinse the other volumetric flask with ultra pure water three times.
b. Use a pipet to add 5 mL of the 100-ppm Na standard to the volumetric flask. Put the pipet in
the flask to add the solution.
c. Add ultra pure water to the 500-mL mark.
d. Shake the volumetric flask to fully mix the solution.
4. Prepare 500 mL of 1000-ppb Na calibration standard as follows:
a. Rinse the other volumetric flask with ultra pure water three times.
b. Use a pipet to add 50 mL of the 100-ppm Na standard to the volumetric flask. Put the pipet in
the flask to add the solution.
c. Add ultra pure water to the 500-mL mark.
d. Shake the volumetric flask to fully mix the solution.
5. Keep the solutions that are not used in a clean plastic bottle. Rinse the bottle with ultra-pure
water and then with a small amount of the calibration standard. Put a label on the bottle that
identifies the solution and the date it was made.
5.3 Show the calibration data
To see the results of the last calibration, push cal and select CALIBRATION DATA.
To see the results of the last ten calibrations, push menu and select VIEW DATA > LOG DATA >
VIEW CALIBRATION LOG.
5.4 Do a calibration verification
Do a calibration verification to identify if the analyzer is still calibrated.
1. Push menu, then select GRAB SAMPLE/VERIFICATION.
2. Select VERIFICATION, then push enter.
3. Follow the instructions on the display.
4. When prompted, add 200 mL of the calibration standard to the overflow vessel. The
recommended standard is 100 ppb.
Note: Do not use a standard solution that is less than 100 ppb because it can quickly become contaminated,
which changes the concentration.
Important: The temperature of the calibration standard must not be more than ± 5 °C (9 °F)
different than the calibration standard that was used to calibrate the analyzer.
5. When the calibration verification is completed, do a calibration immediately if "FAIL" shows. If
"PASS" shows, no action is necessary.
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