User Manual

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