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Re: LIVP Oil Pressure Question (TSIO550E)...Problem
Solved
Report on Results:
I scored the surface of the sender and soldered a ground wire to
the surface.
The grounding wire from the Sender unit to a point on the engine
did not effect a change to the fluctuating oil pressure discussed
previously. Moving the grounding wire to the battery/buss ground
terminal on the firewall normalized the oil pressure reading,
stabilized the value, and removed the fluctuations.
Problem solved with appropriate ground for the OP
Sender.
Jeff L
N334P
Perhaps the rigged grounding wire to the
engine (at one aft outcropping) was insufficient. A solid ground
to a terminal post would be sensible.
The transducer is a "single wire
standard ground" VDO 150 psi Oil pressure Sender obtained from
Grand Rapids for the Chelton EAU. It obtains its ground through
the NPT threads (supposedly).
http://usa.siemensvdo.com/products_solutions/marine/marine-instruments/ocean-line-engine-monitoring/sensors-and-senders/pressure-sender/individual-pressure-senders/Individual-Pressure-Senders.htm
0-150 PSI
1/8-27 NPT 29/12 360 00
"Please note: VDO senders have tapered threads. DO NOT
use teflon tape or pipe sealant. This will interfere with
grounding. "
It is mounted on the firewall via an
insulated (rubber grommet) Adell clamp, so no grounding through the
metal sensor casing.
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