Ionics Instruments 2004 Page 9-2 DLM 30007-08 Rev. A
WARNING
Improper calibration of the analyzer will produce inaccurate results. Before
calibrating the analyzer, carefully read the calibration procedure below. For
questions regarding the calibration, contact Ionics Instruments.
NOTE
For on-line measurement of low TOC water (<10 ppb) there may be a need to
recalibrate the TC Zero Offset during the first few months of operation. Check
the offset after ~1 week, ~4 weeks and ~2 months of operation as described in
this chapter.
NOTE
If the Oxidizer Reagent is more than 2 months old, it may be necessary to use a
higher oxidizer flow rate than the 2.5 or 2.0 µL/min. flow rate selected with the
S4-25 ppm Standard Preset.
NOTE
For instrument firmware with the DataGuard feature, enter a QA-level (or
higher) password when prompted. Check with your system administrator for an
appropriate password. See the DataGuard Operation chapter for more
information regarding the DataGuard feature.
Supplies for TC and IC Standards
Ionics Instruments offers prepared standards:
STD 30001 25 mg/L Carbon as KHP TOC Calibration Standard (40mL vial)
STD 30002 25 mg/L Carbon as Na
2
CO
3
IC Calibration Standard (40mL vial)
STD 30003 Reagent water (40mL vial)
STD 31001 Grab Mode Calibration Set (1-40mL Reagent Water, 2-40mL
25mg/L KHP, and 2-40mL 25mg/L Na
2
CO
3
)
Additional standards will be required if the calibration procedure is not
successful initially and the procedure must be repeated.
To prepare calibration standards on site, refer to Appendix E.
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