GE Analytical Instruments ©2016 114 of 270 DLM 68100-09 EN Rev. A
Chapter 5: Calibration and Verification
The dilution ratios available for use in Auto Dilution are shown by range in Table 8.
Blank Correction
Use the blank correction feature if you want the Analyzer to automatically calculate the TOC contribution from
the acid, oxidizer, and dilution water used with the Analyzer and exclude TOC contributions from these sources
when calculating calibration values. For additional information, see “
Blank Correction” on page 150.
Only calibrate the Analyzer with blank correction turned on if your samples contain less than 10 ppm TOC, IC, TC
or NPOC and you also plan to measure your unknown samples with the blank correction feature turned on. If
you run a 'zero' or blank as your first point in a calibration curve, it is not recommended to use the blank
correction feature.
In order to perform a calibration with blank correction on, first calibrate the Analyzer in TOC mode in the
Up to 1,000 ppm range with blank correction off. Then perform the blank measurement using that calibration.
See “
Measuring the Blank” on page 151 for the procedure.
Calibration Groups
If you are using the Analyzer’s Auto Range function, you will need to specify at least one calibration group. The
calibration group tells the Analyzer which calibration to use in each range. The Analyzer can store up to 20
calibration groups.
To set up a calibration group
1. From the Menu screen, select Cal/Ver.
2. Select Calibration Groups.
3. Press the New button.
Table 8: Maximum Dilution Allowed Using Auto Dilution Feature
Range
Maximum
Dilution
Up to 100 ppm 14:1
Up to 1,000 ppm 10:1
Up to 5,000 ppm 4:1
Up to 20,000 ppm Not available
Up to 50,000 ppm Not available
NOTE:
All Auto Dilution ranges are available to include in a calibration group, with the exception of the
Up to 100 ppm range.
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