Geokon 6300, Instruction Manual, Page: 22 / 24

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APPENDIX C. EXCITATION AND READOUT PARAMETERS
The Micro-10 Datalogger which uses the Campbell Scientific Measurement and Control Module
can be used to continuously monitor the Model 6300.
The following parameters are recommended:
C.1 Excitation
The 2.5-volt excitation directly off the wiring panel is ideal for these sensors. The 5-volt supply
from the AVW-1 and AVW-4 modules is also usable, but the 12-volt excitation should be
avoided as it tends to overdrive the sensor.
C.2 Excitation Frequency
The starting and ending frequencies of the excitation sweep should be kept in a relatively narrow
band for these sensors to maximize the stability and resolution of the output.
The frequency band for the full range is shown on the calibration reports.
The frequencies can be determined from these. The highest and lowest frequencies shown can be
used to determine the sweep parameters. After initial readings are obtained, parameters should be
set to 200 Hz below the resonant frequency and 1-200 Hz above.
C.3 Offset
To maximize the five-digit, high resolution output, the offset parameter can be used to remove
the zero offset of the sensor.
In other words, if the installed reading is 4,300, the offset parameter could be set at -4300 which
would theoretically change the resolution from 0.1 digit to 0.0001 digit.
For assistance in programming these parameters contact Geokon, Inc.