Determining Correct Wiring; Table 4 - Standard Single Gage - Geokon 8800-2-1A Instruction Manual

4) Insert the conductors of each cable into the terminal blocks of the multiplexer by
pressing down on the orange tab at the back of the terminal block, inserting the
conductor, and then releasing the orange tab. See Section 3.3.3 for information on
determining the correct wiring.
5) Tighten the nuts on the cable fittings. This must be done to ensure that water does
not enter the enclosure. Avoid overtightening as this may damage the plastic
threads.
6) Reinstall the cover. Ensure that the rubber gasket is properly seated in the groove on
the underside of the cover. Tighten the screws a little at a time, working in a diagonal
pattern; this ensures that the cover seals correctly.

3.3.3 Determining Correct Wiring

Geokon instruments with a single vibrating wire gage should be wired according to Table
4. (As shown on channels six, seven, and eight in Figure 14.)
Position
VW+
VW-
TH+
TH-
SHLD
To determine the correct wiring for Geokon instruments with multiple vibrating wire
gages, refer to the wiring chart(s) in the manual provided with the instrument. These
types of instruments will require the use of more than one channel in the Multiplexer. For
example, a five transducer Borehole Extensometer has been wired into channels one, two,
three, four, and five in Figure 14. For instruments that have multiple gages sharing a
single conductor, refer to Section 3.4, "Shared Channels".
Color
RED
BLACK
WHITE
GREEN
BARE Analog Ground (shields)
Table 4 - Standard Single Gage Wiring
Figure 14 - Sample Wiring
Description
Vibrating Wire +
Vibrating Wire -
Thermistor +
Thermistor -
13