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Sample Sequencer
Operation
BATCH The batch mode is for analyzers that take a "bite" or batch of sample and then spend some
time analyzing it before outputting a new fixed analog signal. Typical types are reagent
additive, chromatographs, etc. When these analyzers have completed an analysis there is
just one output value until the analyzer's next cycle is completed, (as opposed to a
continuous analyzer that shows the contemporary trend.) The Hach Series 5000 analyzer
operates in this manner.
See Appendix D for instructions about connecting a
Hach 5000 analyzer to the Sample Sequencer.
An "End-of-Analysis" contact closure signal is often provided at the conclusion of a batch
by the batch type analyzers. Note: The term, End of Measurement, is often used in place
of "End of Analysis". Following the end-of-analysis, the analyzer provides a specific
protocol of the analog output values to the Sequencer.
FIGURE 9 - Batch Mode Timing Diagram (For Batch-Type Analyzers)
SENTRY Equipment Corp • P. O. Box 127 • Oconomowoc, WI 53066 • 262/567-7256 • FAX: 262/567-4523
Web: www.sentry-equip.com • e-mail: sales@sentry-equip.com
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