J.P. Instruments Slim Line Gauges Installation Guide - Manual

INSTALLING THE SLIM LINE® INSTRUMENT SERIES PAGE 1 OF 14
REV B
Applicable to
Slim Line® Temperature, Pressure, and
Volt-Amp Instruments.
READ THIS FIRST
The following notes apply to a new installation. Read this section before proceeding.
a) The JPI warranty found in the back of this manual clearly states that JPI will replace defective parts under
warranty, but does NOT cover labor to remove or install any parts from or to the aircraft.
b) This installation will require some parts unique to your aircraft that are not supplied with the kit, (including
but not limited to tie-wraps, hoses and fittings). Acquire all the necessary parts prior to beginning the
installation.
c) This manual is applicable to temperature, pressure and volt-amp instruments. Refer only to those sections
that pertain to your particular instrument(s).
d) Determine the locations of all holes before drilling to ensure that nothing interferes with the probe, clamp,
clamp screw or wire.
e) Provide service loops at the instrument.
f) Power up and test the instrument before installing it in the instrument panel.
g) Thermocouple wire length is not critical. Trim to required length, allowing for service loops at the engine so
that the probe can be swapped to adjacent cylinder positions for troubleshooting purposes.
h) Dress all wires away from high temperature components such as exhaust stacks.
i) Never splice thermocouple wire using copper wire. Use only K-type thermocouple wire. Soldering
thermocouple wire is not recommended, but if you must, solder using zinc chloride flux such as Nokorode
brand – rosin flux won’t work.
j) Observe correct polarity on all probe wires. Connect like colors together (red to red [-], yellow to yellow
[+]). Two-terminal pressure sensors have no polarity restrictions.
k) The most common cause of probe problems is poor terminal crimps. Crimp ring terminals with AMP part
48518 crimp tool or equivalent.
l)
1) Installation Overview
The overall installation procedure is as follows:
1. Power the instrument on the bench to verify it was received in working order. Set the alarm limits, if
necessary.
2. Install the instrument in the instrument panel.
3. Install the probe or sensor in the engine compartment.
4. Connect the connectors to the instrument.
5. Run the wires from the instrument in the instrument panel through the fire wall to the engine
compartment. Dress the wires to the probe or sensor.
6. Cut the excess length off the wires and connect to the probe or sensor.
7. Verify instrument operation.
January, 1998
JPI
I 3 5 5
EGT °F