You can cut it off without grounding anything but of course the auto
tune function of the EM2 will not work without the O2 sensor
input. The mixture indicator on EM2 will drift around
unless you ground it. This is one example of where you can usually
parallel two instruments from one sensor and it will work.
Mixture monitors just look at voltage from the sensor and are usually very
high input impedance so they should not load down the sensor.
BTW Buly, when I looked at your EC2 map table prior to the snubber
update it was VERY erratic. I was surprised the engine ran well
enough to fly. Take a look at it with your EM2 and make sure it looks
reasonable after you do some tuning.
For instance, if two adjacent MAP addresses are at opposite ends
of the scale, it is not reasonable and you should investigate.
It is very instructive to fly with the MAP table screen up on the EM2 in
track mode and watch the table pointer (blinking bargraph bar) and the
mixture monitor. Move the throttle around so that the pointer moves
through the suspected problem areas and insure that the mixture monitor
stays in the middle. If it doesn't, adjust the MAP address that causes
mixture to go out of proper range.
Tracy
----- Original Message -----
Sent: Thursday, May 10, 2007 9:58
PM
Subject: [FlyRotary] Re: EC2
question
I'm not using the O2 sensor lead for the EM2. I wander
if I can just cut it off at the plug, or have to ground it? I have
installed a wide band O2 sensor with it's own processor and
display.
Buly
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