Installation manual

610C-001 INSTALLATION MANUAL DOCUMENT No. 070906 REV. 1.2
INSIGHT INSTRUMENT CORP. BOX 122, FORT ERIE, ONTARIO, L2A 5M6
Installing The Turbine Inlet Temperature Probes (Model G3)
There are three types of Turbine Inlet Temperature (TIT) probes which can be used with the GEM G3 series
system.
• Clamp-Type TIT Probe (Part number 2871) - is identical to the EGT probe except that
the clamp diameter is larger
• Threaded-Type TIT Probe, including a weld-on boss (Part Number 2872)
• Threaded-Type, 1/4” NPT TIT probe (Part Number 2873)
For aircraft with a threaded fitting boss already welded to the turbine inlet, the two threaded type probes are
used - part number 2872 (7/16”-20 Thread) and part number 2873 (1/4 NPT Thread), as applicable. The 2872
Threaded fitting can be installed on any aircraft when a more permanent installation is desired, or when space
for the clamp-type probe is limited.
Probe Type 2872 fits in a 1/2” inch hole and should be welded by an approved exhaust repair facility.
Locate and drill the probe hole as described in Section “INSTALLING THE EXHAUST GAS TEMPERATURE
PROBES”, and refer to Drawing No. 8254 for the recommended location.
NOTE: If you have questions as to the correct type or location of TIT probes, call Insight Product Support for
technical assistance.
Installing The Manifold Tee
The G3 is supplementary for manifold pressure. The G3’s manifold pressure sensor is located internally inside
the G3 display. Refer to Drawing 610C-315 for the location of the G3 Manifold Pressure port (5/16”-24 #2 Flare
fitting). The installer must supply the tubing and a “Tee” fitting to connect the G3 to the existing manifold pres-
sure indicator.
Installing The Oil Temperature Probe
The G3 is supplementary for oil temperature. Install the Insight Oil Temperature probe into an existing tapped
hole in an oil gallery in the engine. Insight can supply Oil Temperature probes in a variety of thread sizes to
suite most engine types. Consult with the engine manufacturer to determine the probe-hole location and thread
size. Ensure the probe does not interfere with any internal engine components. Refer to Drawing 610C-315 for
electrical connections.
Installing The Oil Pressure Probe
The G3 is supplementary for oil pressure. Install the Insight Oil Pressure Sensor (1/8 NPT) on a length of flex-
hose “Tee-ed” into the existing oil pressure sensor. The Installer must supply the “Tee” fitting, flexible hose and
mounting hardware. Refer to Drawing 610C-315 for electrical connections.
Installing The Tachometer Cable for RPM
The G3 is supplementary for Tachometer. Insight provides a shielded cable with included protection-resistor for
connection to a magneto. Refer to Drawing 610C-315 for electrical connections.
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