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Sample Sequencer
Operation
I/O Board DIP Switches
Figure 7 shows the location of the four DIP switches at SW1 on the I/O board. The I/O board is
normally supplied in the Sample Sequencer and plugs into the display board with the long dual-row 42
pin connector. The SW1 DIP switch functions are described in Table 2 below.
Table 2 I/O Board DIP Switch (SW1) Functions
SW1
No.
Description
Function
OFF ON
1
2
3
4
Programming
Type of plug-in output board
Calibration
Operation Mode
Lock-out
Plug-in electronic track &
hold board
Normal Operation
Cycle Mode
Enable
Signal switching output,
0-1 volt or Remote
track & hold boards
Calibrate Mode
Batch Mode
SW1-1
allows one to lock-out front panel programming by putting this switch in the lock-out (OFF)
position. The ON position enables programming form the front panel.
SW1-2
configures the Sample Sequencer for the type of plug-in output board which has been
installed. The switch should be in the off position if the Plug-in electronic track & hold board(s) is
used. Select the ON position if either the Signal switching, 0-1 Volt DC output or remote
track &
hold board are used.
SW1-3
enables the calibration mode. Turn the switch On when the ANALOG mA signal display
must be calibrated. This forces the Sequencer into a fixed state to conveniently calibrate the
Sample Sequencer via the gain and offset potentiometers on the display board. (See the
Calibration section in this manual for more information.) Turning the switch OFF turns off the
calibration mode and permits normal operation. The START/RESET control switch on the front
display must be pushed to start sequencing after completing calibration and turning SW1-3 OFF.
Note: The Sample Sequencer is shipped factory-calibrated.
SW1-4
configures the Sample Sequencer for the desired mode of operation. The OFF position
enables the cycle mode for continuous type analyzers. The ON position enables the batch mode
for batch type analyzers, such as Hach Series 5000.
See Appendix D if using the Sample Sequencer
with Hach Series 5000 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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