Ionics Instruments 2004 Page 4-24 DLM 30007-08 Rev. A
Preset Flow Rates
To simplify selection of acid and oxidizer flow rates for on-line monitoring water
purification systems, preset values stored in the analyzer can be used. These
flow rates are based upon the typical TOC concentration found in such
samples. Preset flow rates are available for on-line mode only. Though the
rates are applicable to grab mode, grab mode flow rates must be entered from
the reagent menu as described in the Manual Grab/Flow Rates section that
follows. Four preset flow rates are available; the corresponding acid and
oxidizer flow rates are listed in Table 3.
Table 3. Preset Acid and Oxidizer Flow Rates
PRESET Acid Flow Rate Oxidizer Flow Rate
S1-Deionized Water 0.20 µL/min. 0 (Off)
S2-Post GAC/RO 0.40 µL/min. 0.20 µL/min.
S3-Raw Water 0.75 µL/min. 0.50 µL/min.
S4-25 ppm Standard 0.75 µL/min.
2.0 or 2.50 µL/min.
Preset S1 is used for TOC measurements in low TOC, deionized water.
Preset S2 is used for TOC measurements in low TOC water before
deionization but after granular activated carbon (GAC) treatment and/or
reverse osmosis (RO) treatment.
Preset S3 is for measurements in non-deionized water containing ≤5 ppm
TOC (for example tap water).
Preset S4 is for measurements in non-deionized water containing ~25 ppm
TOC and for calibration of the analyzer using a 25 ppm TOC standard.
To select one of the preset reagent flow rates from the SETUP menu:
1. Press the down arrow () to scroll to PRESETS and press ENTER.
The PRESETS menu is displayed:
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