When installing the probe within a dirt or gravel driveway, first bury a 2 inch schedule 80 PVC pipe
in the center of the driveway, 6-8 inches deep, and diagonally at a 45 degree angle (see Figure 2 on
page 4). Slide the probe and cable to the end of this pipe, putting the probe in the middle of the
driveway. This will make it easily retrievable in the future.
When installing in new construction, bury the 2 inch PVC pipe under the driveway as described
above. Then pour cement or asphalt the drive. Insert the probe and cable after landscaping is
complete to prevent possible damage to the cable.
The probe cable is direct burial and does not require conduit. Depth of burial depends on lawn
conditions. In cultured grass, bury the cable 2-3 inches deep. The root system of the grass will
capture the cable for life. Use a lawn edger to slice a 1/4 inch wide trench across the lawn to the
location of the control unit. Push the cable to the bottom of the slice, fill, and tamp. In uncultured field
grass or in soil without cultured grass, bury the cable at least 6-8 inches deep.
When installing the cable through woods or above ground, run it in PVC pipe for mechanical
protection, as animals will chew through the cable if it is exposed.
When pulling the cable through conduit or PVC pipe, it is important that every inch of cable be
liberally lubricated. Use a wire lubricant, and pull only 100 feet or less at one time. The cable is
coated with polyurethane and therefore has extremely high traction. This can cause a tremendous
drag when not lubricated; enough to inconspicuously snap the wire inside the rubber casing.
Therefore, make sure you lubricate it when pulling it through conduit or PVC pipe.
Also, the polyurethane coating on the probe cable demands that extreme care be taken when
unrolling it. To unroll, put your arm through the center of the roll, remove the tape, and unravel the
roll one wrap at a time. Once you begin unrolling the cable, do not lay it down before you are
finished lest it becomes irreparably tangled.
SPECIAL NOTE:
The shielded cable can be buried in the same trench (not conduit) with power, telephone
and water lines, if codes permit. Consult local and national codes.
C
ONNECTING
CT-6 P
ROBE
TO
C
ONTROL
U
NIT
See Figure 1 on page 1. At the control unit, hook up the RED probe wire to terminal No. 10;
connect SHIELD (Drain) wire to terminal No. 11; connect the BLACK wire to terminal No. 12.
M
ULTI
-P
ROBE
A
SSEMBLIES
See Illustration at right. The CT-2B system can support up to four standard
sensor probes without loss of sensitivity when wired in series. The probes should
be hooked up as shown in the illustration at right. Solder and tape all inter-
connections Solder-tin the leads before connecting to terminals 10, 11, and 12.
P
HASING
P
ROBES
Phasing of multi-probe assemblies is important when a probe is placed on both sides of the same
driveway, or several probes are linked together to cover a large area. Phasing is not important in
installations where a vehicle does not pass between two probes, such as probes used on separate
driveways or when several probes are linked together at greater than 50 foot intervals. The phase
output of the probe is controlled at the time of manufacturing.
SD-6 S
HORT
D
RIVEWAY
D
UAL
-P
ROBE
S
YSTEM
The SD-6 double-probe system installation instructions are shipped with the SD-6 dual-probe set.
Only one SD-6 system can be used with the CT-2B control unit.
5
