SECTION 1: INSTALLATION 7
EPI800 Manual.doc EPI 800 MANUAL 2001 Vision Microsystems Inc.
1.8 FUEL FLOW TRANSDUCER INST.
The fuel flow transducer is mounted in the pressurized side of the fuel
delivery line of the engine, not on the suction side. Contact us if your
engine does not have an engine driven fuel pump. The transducer inlet
and outlet are tapped ¼” NPT. Use only aircraft grade components
appropriate for the plumbing. Connect to the DPU harness as shown in
‘APPENDIX B: DPU P1 Connector Harness Fabrication’ using the
supplied terminals or with an equivalent or better method.
For carburetors the transducer is typically located between the engine
driven pump and carburetor. For injected applications it is typically
located between the fuel flow servo and flow divider or, between the
engine driven pump and fuel flow servo. Check with the airframe/engine
manufacturer for the proper location.
IMPORTANT NOTES:
DO NOT: mount the transducer where 'upstream turbulence'
may exist, such as sharp bends or other disturbances in the
fuel line. A desired minimum straight run of 5 inches of inlet
fuel line is recommended.
DO NOT: ground the transducer body to any part of the aircraft,
if possible. Otherwise INSURE that the engine is EXTREMELY
well grounded.
TRANSDUCER ORIENTATION: If the transducer is not
oriented properly (with respect to level) a significant accuracy
error can occur. See ‘FIGURE 7: Fuel Flow Transducer
Orientation’ for the proper orientation.
After installation, we recommend wrapping the transducer with
a blanket of heat barrier material such as 'FIRE SLEEVE'.
Make sure the material is properly secured using standard
aircraft practices and procedures.
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