Geokon 6160, Руководство по установке

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6
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Plasma surge arrestors can be epoxy potted into the gage cable close to the sensor. A ground
strap would connect the surge arrestor to earth ground, either a grounding stake or other
suitable earth ground.
Figure 5 - Lightning Protection Scheme
3. TAKING READINGS
3.1 Dataloggers
In most cases the 6160 and 6161MEMS Tiltmeters will be monitored continuously and
automatically using a Datalogger. Connections to the Geokon Model 8021 Micro-1000
Datalogger, which uses a Campbell Scientific CR1000 MCU are shown in Appendix C Page 12.
3.2 RB-500 Readout Box
The RB-500 readout box is designed to take readings for manually transcribing into a field book;
it has no storage capabilities. This method is useful for reading systems that do not require
continuous monitoring. The RB-500 readout box is also useful during initial installations and for
setting up Datalogger systems.
3.3 Measuring Temperature
Although the temperature dependence of the MEMS tilt meter is tiny, and usually does not
require compensation, it sometimes happens that temperature effects can cause real changes of
tilt, therefore each MEMS tilt sensor is equipped with a thermistor for reading temperature. This
enables temperature-induced changes in tilt to be distinguished from tilts due to other sources.
The RB-500 will not read temperatures a separate digital ohmmeter is required. (or a GK403 or
GK 404)
The thermistor gives a varying resistance output as the temperature changes. See the wiring
diagram in Appendix C, page 14 for the wiring code. Appendix B shows the conversion of
resistance to temperature.
Terminal Box/Multiplexer
Instrument Cable
LAB-3 Enclosure
LAB-3 Board
Model 6350 Tiltmeter
Wall
Ground Connections
Surface
(usually buried)