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Sample Sequencer
Appendix D
Older Hach Series 5000 Analyzers
If you have an analyzer with a catalog model number 5000X-XX, contact Hach Service Dept. at 1-
800/227-4224 regarding using the Sample Sequencer with your analyzer. An updated software
EEPROM may be required to operate correctly with the Sample Sequencer.
If you have an analyzer with a catalog model number 5500X-XX, configure your unit as follows:
Model 5500X-XX Configuration
1. The wiring is different for the model 5500X-XX then shown in Figure D1. The changes are: (a)
Connect the Sample Sequencer I/O board terminals J4-3 and J4-4 to the Hach terminals labeled NO
and COM on ALRM 2. (b) Connect the Sample Sequencer I/O board terminals J4-2 and J4-5 to the
Hach terminals labeled NO and COM on SYS ALRM.
2. Open the control module door and loosen the screw to allow access to the rear of the display board.
Remove the back cover.
3. Turn ON the #1 DIP switch (S1) by pressing it. This puts the analyzer in the Extended Diagnostic
menu.
4. Press the TEST key.
5. Using the NEXT key, scroll through the diagnostic menu to "MARK END of MEAS", then, press
ENTER. This will cause the number 2 alarm contact to close at the end of each analysis cycle. The
Series 5000 now provides a contact closure to advance the Sample Sequencer to the next sample
point each time alarm 2 contact closes. The alarm 2 contact can no longer be used for an alarm
signal.
6. After pressing ENTER, return the #1 DIP switch (S1) to the OFF position. Replace the cover and
close the meter panel. This returns the analyzer to normal operation. Note: If a "cold start" is initiated
or the backup battery fails during a power failure, you must reset the Mark End of Meas as outlined
above.
7. Verify the switches (SW1) on Sample Sequencer I/O board are positioned per Figure D1.
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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