From: "Al Gietzen" <ALVentures@cox.net>
Date: 2004/08/25 Wed PM 05:38:55 GMT
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] EM2 users

Now that I have returned from vacation, recovered from an Airline induced
cold, and caught up on other tasks; I can get back to the airplane.  Tracy
was prompt in diagnosing and adding a filter to solve the EM2 display
problem, and I have it back up and running.  That leads to a lot of other
questions - lucky for him he's on vacation, so I thought I'd get some
comments from other users.

So far just sitting with engine off, I'm observing some anomalies, and
wondered whether other users see the same.  Local barometric pressure is 30.02, so I expect it to give me this number as
MP.  With EC2 turned off it reads MP as 29.2 - I assume it is reading this
with the sensor in the EM2.  With EC2 on (data feed from EC2) it reads 32.3.
Neither of the readings is correct.  Should I be concerned?

Battery voltage reads about .75 lower than my voltmeter reads at the
breaker.

The RWS air temp sensors (I have 3) all read 6-8 degrees lower than actual
air temp (75F at the time).  I expect these should be accurate.  The J-type
TCs read right on air temp. The K-type TCs are about 5-7 low at ambient
temps, that doesn't really matter.

Oil and coolant temps were somewhat off, but I adjusted calibration factors
to get them about right.  But didn't quite know whether to change 'Low end
offset' or the 'Sensor offset'.  I assume for the VDO sensors the scale
factors are correct.  The more general question on temp calibration is,
short of taking out the sensor and putting it in boiling water, what's a
good (read easy) way to get another reference point at something like
operating temp?

Anybody using 'Aux Liquid temps' 2&3?   Mine aren't working right.

Al (anxious to make some more noise)