Ian. and All
We had a similar problem using a different gauge. The problem is that you
gauge is seeing a very high resistance to engine ground. That means, an open
circuit. The open can be caused by vibration of the sensor of my wiring and
connectors. We found both problems in fixing this problem on "Beep Beep".
Cliff Shaw
1041 Euclid ave.
Edmonds WA 98020
(425) 776-5555
N229WC "Wile E Coyote"
----- Original Message -----
From: "Ian Mansfeld" <ian_mansfeld@lineone.net>
Subject: oil pressure question...
I could use some advice here, for a 912 engine in a mono.
I recently changed the oil pressure gauge to cure a rapidly fluctuating
indication (far quicker than the oil pressure could feasibly change). I now
have a nice stable reading, excwpt that every so often the needle goes
off-scale at the high end, then slowly returns to normal. There does not yet
seem to be any set of flight conditions or power settings linked to this,
other than I have only ever seen it after 40 to 50 minutes of flight. This
is the only instrument that shows a bad reading. My suspicions are with the
wiring, and I would like to confirm this by using a DVM around the system.
Can anyone either tell me, or point me to the relevant source text, on how
the sensor and gauge operate? E.g. does the gauge measure the resistance of
the sensor, and how does this vary (e.g. voltage/resistance vs pressure)?
Thanks in advance,
Ian.
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