Rice Lake Combination System - Precision Loads PL9700 Indicator - Manual (Page 17)

Installation 13
7.0 Installation
The PL9700 indicator system includes the indicator, two transmitters with cables to connect to the load cells, one
single-piece cable for the truck (channel 1), a two-piece cable for the trailer (channel 2), and a power cable. Items
to be supplied by the operator include a plug and socket for the trailer (channel 2) cable, mounting hardware for
the indicator and transmitters, and an inline fuse holder with a 3-amp slow-blow fuse.
Before starting the installation, tape over the ends of the connectors to keep them free of dirt and grease. Small
plastic bags, like sandwich bags, could also be used for protection.
Plan the location of the indicator to minimize exposure to direct sunlight on the indicator face. Even though the
weight display has super-bright numbers, direct sunlight makes them more difficult to view.
The transmitters should be mounted in a location protected from road debris and sticks and branches. The typical
mounting areas are inside the frame rails or on the back-side of a crossmember. Remember to keep cable loops to
a minimum to avoid having them snagged on debris or tools.
7.1 Installing the Indicator
1. Find a suitable location where the indicator
will be convenient to the operator.
2. Remove the U-bracket from the indicator and
use it as a template to mark the drilling
locations for the four mounting screws.
3. Use four #10 or #12 screws to mount the
U-bracket.
4. Install the indicator back into the U-bracket
and verify that the indicator is in a desirable
location.
5. Unplug the cable connector from the back of
the indicator by pulling straight away from
the indicator back. Set next to the indicator
for later installation.
7.2 Transmitter location
Once all load cells, transducers or load pins have been
i n s t a l l e d , s e l e c t a m o u n t i n g l o c a t i o n f o r t h e
transmitter. Typically all cable leads from the load
cells and load pins measure 30 inches (76 cm) in
length. Air and hydraulic pressure sensors have output
connectors mounted on the transducer enclosure and
do not have leads.
Standard transmitters have leads which measure as
follows:
• Single lead transmitter: 60 inches (152 cm)
• Dual lead transmitter: 48 inches (122 cm); 60
inches (152 cm)
• Four lead transmitter: 144 inch leads x 4 (366
cm each)
• Six lead transmitters: 144 inch leads x 4; 216
inch leads x 2 (548 cm)
Locate the transmitter(s) in areas protected from
handling equipment, exposure to moving parts, road
hazards, pivoting parts, tree branches, etc. Cabling
should never be taut.
7.3 Mounting the transmitter
Mount the transmitter using the two 0.275 inch (7mm)
mounting holes in the case flanges. The installer may
drill a 1/4" hole in the chassis or a crossmember, using
through bolts and locknuts to mount the transmitter, or
the transmitter may be mounted to a separate plate
(min 1/4" thick) which picks up existing chassis bolt
holes. Use 1/4" diameter mounting bolts. Do not over
tighten the mounting bolts.
7.4 Installing the Cables
Plug the transmitter leads into the load cell leads or
pressure transducer connectors. Run the two-wire
cable from the three-pin transmitter connector to the
truck cab or tractor/trailer connector. In routing the
two-wire cable, provide protection of the cable from
moving parts, road hazards, heat, corrosives, etc. Do
not attach the two-wire cable to air lines. Provide for a
small service loop in the two-wire cable at each end.
Tie all cables down using heavy duty cable ties at no
greater than 18 inch (45 cm) intervals.
The stainless steel transmitter is a sealed,
encapsulated and riveted unit and is NOT
field serviceable. Do not attempt to weld
on or open the transmitter, or to remove
the unit's connector or cable strain relief parts. Opening or
altering the unit will void warranty coverage.
7.5 Routing the Signal Cables
1. Route the two cables from the truck (channel
1) transmitter to the two truck load cells. Note
w h i c h l o a d c e l l ( l e f t o r r i g h t ) h a s t h e
red-banded cable. Secure the cables with
nylon cable ties or tape so the cables are
protected and exposed loops are minimized.
2. Similarly route and secure the two cables
from the trailer (channel 2) transmitter. As an
a i d i n t r o u b l e s h o o t i n g , c o n n e c t t h e
red-banded cable to the same side as on the
truck.