Geokon 6160, Installation Manual

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13
APPENDIX D 6160 Standard Addressable Systems
Description:
The standard 6160 addressable system incorporates a Distributed Multiplexer Circuit Board that
allows multiple MEMS type tiltmeters, uniaxial or biaxial, to be connected as “drops” off of a
single bus.
The tiltmeter “string” is addressed via ENABLE and CLOCK signals in the same manner as the
Geokon Model 8032-16 Channel Multiplexer.
The addressable tiltmeter string is “enabled” by raising the appropriate Datalogger Control
Port to 5V. After the string has been enabled, a delay of 125 mS is required before executing
the 1
st
of the two clock pulses required to activate the 1
st
channel. Once the channel is
selected, a delay of 100 mS is required for the sensor to warm-up. The sensor’s A-axis is read
100 times and then the average of these readings is stored. The sensors B-axis is then read.
Finally, the sensor’s thermistor is read through a bridge completion circuit and the
temperature is calculated using a polynomial formula. Examples of CRBASIC programming
can be found in Appendix F.
Wiring:
06-312V0
Cable Color
Connector Pin
Designation
Addressable MEMS System
(Logic Level Style)
Yellow A A-axis Output Differ
Yellow’s Black
B A-axis Output Differential -
Brown C B-axis Output Differ
Brown’s Black
D B-axis Output Differential -
Red E 12VDC
Red’s Black
F Ground
White G Reset
White’s Black
H Ground
Green J Clock
Green’s Black
K Ground
Blue L Thermistor*
Blue’s Black
M Thermistor*