Ionics Instruments 2004 Page 9-10 DLM 30007-08 Rev. A
Make sure the end of the tubing is several inches below the liquid
level.
17. From the GRAB SAMPLING menu, use the
arrows ( or ) to scroll
to START and press ENTER. The analyzer will make 10
measurements. When the measurements are finished, the average
TC value and relative standard deviation for the last three TC
measurements of the Reagent Water Blank will be displayed.
18. Record the average value from the last three TC measurements of
the Reagent Water Blank on the Calibration Worksheet.
Step 2 – Measure the 25 mg/L Carbon as KHP TC/TOC Calibration Standard:
1. Record the concentration of the certified TC/TOC standard on the
Calibration Worksheet. Add the average value obtained in Part One
for the Reagent Water Blank to the certified TC/TOC Standard
concentration to obtain the Adjusted Standard Concentration; record
the value on the worksheet.
2. From the GRAB SAMPLING menu, scroll to SETUP and press
ENTER.
3. Scroll to REAGENTS and press ENTER. Scroll to ACID FLOW
RATE and press ENTER. Verify that the rate is set to 0.75 µL/min.
Press CLEAR to return to the REAGENTS menu. Scroll to
OXIDIZER FLOW RATE and press ENTER. Set the Oxidizer Flow
Rate to 2.50 µL/min or 2.0 µL/min (to determine which value is
correct for the analyzer, view the S4-25ppm TOC Standard PRESET
by selecting PRESETS from the SETUP menu). Type in the
appropriate rate, press ENTER to save the value, and press ENTER
a second time to verify the value. Press CLEAR twice to return to
the SETUP menu.
4. Under the REPETITIONS and REJECTIONS respectively, verify that
the repetitions are set to 10 and the rejects are set to 7. Press
CLEAR to return to the the GRAB SAMLING MODE Menu.
5. Place the 1/16"-OD INLET Teflon tube in the flask of site-prepared
standard or in the vial of Ionics Instruments-prepared standard
(labeled TOC Calibration Standard) that contains the TC standard.
Make sure the end of the tubing is several inches below the liquid
level.
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