Campbell Scientific 223-L Delmhorst Cylindrical Soil Moisture Block - Manual (Page 14)

223 Delmhorst Cylindrical Soil Moisture Block
7. Operation
The black outer jacket of the cable is Santoprene ® rubber.
This compound was chosen for its resistance to
temperature extremes, moisture, and UV degradation.
However, this jacket will support combustion in air. It is
rated as slow burning when tested according to U.L. 94
H.B. and will pass FMVSS302. Local fire codes may
preclude its use inside buildings.
CAUTION
7.1 Wiring
The 223 is shown in FIGURE 7-1 and TABLE 7-1. The leads from the block
electrodes are connected directly to the H and L inputs on the AM16/32-series,
AM32, or AM416 multiplexer. The lead from the center electrode (white
stripe or solid white) connects to H and the lead from the outer electrode
(black) to L. A 1k resistor at the datalogger is used to complete the half bridge
measurement.
Black with
White Stripe
(or White) to H
Black
to L
FIGURE 7-1. 223 wiring
TABLE 7-1. 223 Wiring
Color Function Multiplexer
Black w/ White Stripe or White Excitation H
Black Signal Ground L
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