Installation manual

GEM INSTALLATION MANUAL DOCUMENT No. 070906 REV. 1.4
INSIGHT
INSTRUMENT CORP. 14 BOX 122, FORT ERIE, ONTARIO, L2A 5M6
may be installed to allow connection of a 7-pin cable to a 6-pin Vibration Sensor, or 7-pin connectors may be
removed from service and new 6-pin connectors installed, consult Insight for details.
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.
If the Vibration Sensor's Connector assembly is located so as to be subject to rain or other fluids, the connector
assembly should be protected with liquid-resistant wrap or tubing suitable for location in the engine
compartment.
Installing The Outside Air Temperature Probe
The GEM is supplementary for 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. 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 in the engine induction air inlet near the engine induction air filter.
Probes located there will read well as soon as the engine is started.
Refer to Drawing No. 1200-016 for the mounting dimensions and appropriate hole size to drill.
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 (for Aircraft without an existing Flow Sensor)
The GEM is supplementary for fuel flow. Aircraft without existing Fuel Flow (FF) sensors should have one
Insight-supplied sensor installed per engine except for engines equipped with pressure-carburetors, which
require two sensors per engine. The GEM model G4-002 (twin) does not support pressure-carburetors.
Aircraft equipped with TAS-1000 Air Data Systems may share the FF sensor signals with the GEM. Refer to the
following installation drawings and the TAS-1000 Installation Manual Doc No. 1000-402.
Insight manufactures a variety of FF sensors for injected and carbureted engines. See drawing 1000-303
(3 pages) for sensor details and part numbers.
For single-engine aircraft or twins with two GEM instruments, wire the Insight FF sensor in accordance with
Insight Drawing #610C-315, Option "C".
For G4-002 (Twin) installations use Drawing G4-315.
In all installations the Insight FF sensor(s) case must be connected to airframe ground.
The installer must determine the correct type and location for the FF Sensor, and supply the plumbing and
fittings to hook up the FF Sensor to the fuel lines.
For all fuel flow sensor installations refer to FAA AC 43.13-1B, Chapter 8 Section 2, 8-30, 8-31, 8-37, 8-38.