Installation manual

GEM INSTALLATION MANUAL DOCUMENT No. 070906 REV. 1.4
INSIGHT
INSTRUMENT CORP. 10 BOX 122, FORT ERIE, ONTARIO, L2A 5M6
Unpacking the Graphic Engine Monitor Display
·Carefully inspect the contents of this package for damage. If damage is found, save all
packaging so that a claim can be made against the carrier.
· Inspect the contents of the shipment to ensure that all component parts and materials have
been supplied.
· Visually inspect all components for proper identification or damage.
·Immediately report any discrepancies to the Insight Customer Service Department.
INSTALLING THE GRAPHIC ENGINE MONITOR DISPLAY
Models G1, G2 and G3 displays mount in a 2.25 inch diameter panel cutout. A new GEM installation will require
four mounting holes and two holes for the control knobs in addition to the 2.25 inch hole. See Drawing #610C-
001for a display outline. Insight can supply an adapter plate (P/N 610C-033) to allow mounting a 2.25 inch GEM
in a 3.125 inch hole. Beware of third-party adapter plates that may not provide correctly sized or tapped holes.
The G1, G2 and G3 will fit directly into the holes from a previously installed GEM Model 610. Upgrading from
GEM 602 or 603 will require a single new hole for the upper control knob.
G4 models fit into a 3.125 inch diameter hole.
See Insight drawing 930309 for 2.25 and 3.125 inch panel mounting holes.
Connections to the GEM G-series displays shall be made in accordance with Drawing No’s. 610C-315 and
1200-018. Care should be given to provide sufficient depth allowance for harness and cable routing at the rear
of the display. Plan for service loops in all the wiring to ease service or adjustments after the installation.
NOTE: Check for the possible existence of a “double” ground, particularly if the GEM is a replacement for a
previously installed GEM display. The GEM must have only one ground connection.
Installing The Exhaust Gas Temperature Probes
The Exhaust Gas Temperature (EGT) probe is designed fit into a hole in each exhaust stack and be secured
with an integral stainless steel clamp.
It is important that each probe is mounted a uniform distance from the exhaust stack flange. For normally aspi-
rated engines, a nominal distance of 2 to 3 inches from the flange is recommended.
For turbo-charged engines, a nominal distance of 4 to 5 inches is recommended. See Drawing No. 8254.
If the recommended distance is impractical because of obstructions, slip joints, or bends in the exhaust sys-
tem, position all the probes a uniform distance from the flange as space permits.
It is more important that all probes be positioned at a uniform distance from the flange rather than meeting the
preferred dimension. Probe locations closer to the flange may result in slightly higher (inconsequential)
temperature indications. (Careful matching of probe position will provide best temperature readings.)