62 of 220 Anatel A643a Setup - Anatel A643a
RPS - June 2007 - Edition 12
Operator Manual Anatel
If TOC analysis is complete before the set Cycle Time has elapsed, the instrument goes into
an Idle State and awaits the start of the next analysis. During this Idle Time, Sample Valve 1
either allows or prevents sample water flow, depending on the Analyzer’s Sample Mode
setting (see “Sampling Mode” on page 66). When the setting is Continuous, the measurement
cell is continuously purged until the conclusion of the Cycle Time; when Water Saver is
selected, sample flow through the Analyzer is suspended until initialization of the subsequent
Sample Time. If the Cycle Time is less than the duration of the analysis, the next analysis
begins immediately. Thus, in order to perform continuous analyses, the Analyzer's Cycle Time
should be set to the default of 0 minutes. This setting is recommended unless a fixed and
lengthy (hourly) analysis is required.
5.5.1 Auto TOC Software Setup
There are several parameters which define Anatel A643a operation in the Auto TOC Mode.
These variables include setting the Sample and Cycle Times, as well as the instrument’s
Sample Mode setting. These time parameters are accessed through the instrument’s Times
& Cycle Menu and determine the duration of its analysis. As noted, the analysis Cycle Time
is comprised of Sample, Oxidation and, in some instances, an Idle Time.
To access the Anatel A643a’s Times & Cycle Menu:
1) With the desired Analyzer selected in any View, press the Setup Key to display its
submenu.
2) Use the Up and Down Keys to specify Sensor Setup.
3) Press Enter to access it submenu.
4) Specify Analysis Setup from among the available selections and press Enter to
display its options.
The Times & Cycle Menu offers the following instrument-specific analysis parameters:
• Sample Time is the period of time water flows through the Analyzer before its internal
sample valve closes and sample analysis begins.
• Cycle Time is the minimum length of time from the beginning of one analysis to the
beginning of the subsequent analysis.
Fig 5-20 : Auto TOC Software Setup
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