Measuring The Blank - GE Sievers InnovOx Operation And Maintenance Manual

Chapter 6: Analyzer Operation
Blank Correction is intended to be used only with samples that are <10 ppm TOC.
N :
The automated Blank Correction feature can only be used after the Analyzer has been calibrated
OTE
TOC mode
level (<10 ppm) TOC mode calibration with blank correction set to Off. Measure the Blank using that
calibration (see the following section for details). After the blank is measured, you can then perform
analyses with Blank Correction set to On.

Measuring the Blank

The Analyzer can measure the carbon concentrations in the acid, oxidizer, and dilution water, and subsequently
blank-correct results. During a blank measurement, the Analyzer flushes the reagents and dilution water, and
then measures the TC and IC in the acid, oxidizer, and dilution water. From those measurements, the Analyzer
calculates the TOC concentrations in the acid, oxidizer, and dilution water.
To measure the Blank
1. Ensure that the Analyzer is rinsed down.
2. Select the Cal/Ver tab.
3. Press the Blank button.
4. Press the Calibration button to select the TOC mode calibration to use when measuring the blank. If
you do not specify a calibration, the Analyzer will use the default TOC calibration for the 1000 ppm
range. Highlight a calibration and then press the Select button.
5. Press the Start Blank button to begin measuring the blank.
6. When the analysis is complete, the Analyzer displays a results screen that lists the measured TC, IC and
TOC concentrations of dilution water, acid, and oxidizer.
7. To save the measured blank values, press the Apply button.
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. If you want to use the automated blank correction at initial installation, perform a low-
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DLM 68100-06 EN Rev. A