Installation manual

GEM INSTALLATION MANUAL DOCUMENT No. 070906 REV. 1.3
INSIGHT
INSTRUMENT CORP. 13 BOX 122, FORT ERIE, ONTARIO, L2A 5M6
Installing the Vibration Sensor
The GEM is supplementary for Vibration Measurement. Insight provides a shielded cable pre-terminated with a
mating 7-pin circular plastic connector (CPC) for connection to an Insight Vibration Sensor (Insight P/N 1000-
004V). Refer to Drawing 610C-315 or G4-315 for electrical connections. Wire as shown for option "A".
Aircraft with 24 Volt (28 Volt) electrical systems require a 750 Ohm resistor installed in series with the vibration
sensors power supply wire.
The sensor should be mounted to an engine case bolt
on the top of the engine as close to the propeller as
practical. The sensor should be oriented with the nameplate up and the aircraft symbol pointing forward. The
sensor may be oriented otherwise if the preferred mounting is impractical, please consult Insight technical
support.
Installing the Outside Air Temperature Probe
The Outside Air Temperature (OAT) probe must be mounted in a location which is in free ambient air. Avoid
locating the probe adjacent to exhaust pipes, in a confined area, or on the top of the fuselage. Refer to
Drawing No. 1200-016 for the mounting dimensions and appropriate hole size to drill.
Any location where the probe is exposed to direct sunlight or radiant heat from the runway pavement will
cause increased temperature readings above ambient temperature.
Insight recommends mounting the probe near the engine induction air filter will often read well as soon as the
engine is started.
Mount the OAT probe in the prepared hole and secure the nylon nut being careful not to over-tighten.
If the OAT probe is installed on a pressurized aircraft where bulkhead penetration is necessary and/or potting
of the OAT probe is required, be certain to apply “Proseal” or equivalent potting substance prior to tightening.
NOTE: Be careful not to get potting substance on the connector.
Installing the Fuel Flow Sensor
Aircraft without existing FF sensors should have one Insight supplied sensor installed per engine except
for engines equipped with pressure-carburetors, which require two sensors.
Insight manufactures a variety of fuel flow sensors for injected and carbureted engines. See drawing
1000-303 (3 pages) for sensor details and part numbers.
Existing FF sensors may be connected directly to the GEM but compatibility with other manufactures' fuel
flow sensors cannot be assured. To connect a GEM to an existing fuel flow sensor/fuel computer system
use Insight Fuel Flow Signal Adapter P/N 610C-025. Use Insight wiring diagram #101116. Compatibility
cannot be assured.
Wire new Insight FF sensors in accordance with Insight Drawing 610C-315 or G4-315, Option "C".
Wire new Insight combination FF/Vibration sensors in accordance with Insight Drawing 610C-315 or G4-315,
Option "B".
For all fuel flow sensor installations refer to AC 43.13-1B, Chapter 8 Section 2, 8-30, 8-31, 8-37, 8-38.
The Insight fuel flow sensor case must be connected to airframe ground.