12 SECTION 1: INSTALLATION
EPI800 Manual.doc EPI 800 MANUAL 2001 Vision Microsystems Inc.
1.14 O.A.T. TRANSDUCER INST.
Before installing the transducer, twist the red and black leads together,
so there is a twist approximately every ½ inch or so. Mount the
transducer in an area of outside air that is undisturbed and not affected
by engine or cabin heat. Avoid placing the transducer and wiring near
any transmitter cables or antennas as they can radiate enough energy
to temporarily disturb the readings. The transducer thread is 1/4-28
UNF-2A. Do not over tighten the transducer or damage will result.
Connect to the DPU harness as shown in ‘APPENDIX B: DPU P1
Connector Harness Fabrication’. You may either connect using the
supplied terminals or with an equivalent or better method.
1.15 C.A.T. TRANSDUCER INST.
Before installing the transducer, twist the red and black leads together,
so there is a twist approximately every ½ inch or so. The transducer is
mounted in the forward side of the carburetor via an access hole that is
cast into the carb body as shown in ‘FIGURE 2: C.A.T. PROBE
MOUNTING’. If this hole is filled with a lead ball plug, it will have to be
removed, counter-bored and tapped. The transducer thread size is 1/4-
28 UNF-2A. Consult a licensed A&P mechanic for this operation. If it
has a threaded plug, remove it. Install an internal lock washer over the
transducer (not included) and insert the transducer. Insure that it turns
completely into the threads and 'bottoms out' against the flat surface on
the carburetor. Remove again and apply a thread sealant with light
locking properties on only the last three threads nearest the hex head of
the probe and re-install. Do not over tighten the transducer or damage
will result. We recommend finger tightening the transducer and then
carefully tightening a max of 1/6 to 1/4 additional turn. Avoid placing the
transducer wiring near any transmitter cables or antennas as they may
radiate enough energy to temporarily disturb the readings. Connect to
the DPU harness as shown in ‘APPENDIX B: DPU P1 Connector
Harness Fabrication’. You may either connect using the supplied
terminals or with an equivalent or better method.
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