Filter
Top Products
Sample Sequencer
Appendix D
Recommended Sample Sequencer Timing Settings
It is recommended the following times be programmed into the Sample Sequencer when using the Hach
Series 5000 analyzers:
Cycle Time.......... 59:59 minutes [1]
Delay Time......... 00:02 seconds minimum
Dwell Time..........00:30 seconds for 8.8 or 15 minute Hach measurement cycle time
Reference the Programming section of this manual for instructions about programming the Sample
Sequencer.
Note, that if the Hach 5000 does not issue an End-of-Measurement contact closure before cycle time
counts down to zero, the analyzer alarm light on the Sample Sequencer annunciates and the
Sequencer turns OFF. This is the reason for the above large cycle time recommendation.
[1] The cycle time is programmed significantly longer than actual analyzer batch analysis duration in
order to allow sufficient time for the 15 minute auto-calibration to occur without the Sample Sequencer
timing out. See the Hach manual for instructions about making the Hach perform auto-calibration on a
regular basis.
See batch mode timing description, "Timing Considerations for Batch Mode" in the operations section
of this manual for additional description of timing.
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
67