Thank you for spending so much time on my problem=2C Gary. I will try and m
ake the suggested measurements. I have another little problem in that I can
't find my documentation. I will have a good search tomorrow=2C and maybe g
et it off the internet.
The unit is a EIS 2000=2C installed around 2000. It never gave a problem. J
udging by the symptons it looks like a loose connection or broken wire. It
would also explain why it is acting up especially when the engine is runnin
g with a little vibration.
The EIS cable with multipin connector ends in a box on the front of the fir
ewall=2C so access should be no problem. The old battery cables=2C which we
re actually new Perihelion
4 gauge aluminum =2C were completely removed=2C and I made up two new very
short leads from the same material.
Cheers=2C Karl
From: gregoryf.flyboy@comcast.net
Subject: RE: Europa-List: Voltage reading of 25V
Date: Thu=2C 29 Jul 2010 16:16:17 -0700
Karl=2C
>The problem is with the EIS=2C only why did it coincide with a battery mov
e ?
It shouldn't=2C unless something else changed.
Ok=2C so the focus is on the Grand Rapids unit. I don't know much about the
unit itself.
What is the model number? Could you steer me to information on it=2C so tha
t I might find out more about it?Not knowing anything about the GR unit=2C
here are some general ideas (all measurements taken with the engine off and
master on).
1. Check supply voltage and ground connections to the remote measuring
system (if there is one). You know=2C the box that sometimes exists under t
he cowl with all the sensor wires running to it.
2. Check supply voltage and ground connections to the EIS unit=2C itsel
f.
3. Check if there are any 'sense' lines that need to be connected that h
ave become open. (Leave this one for later=2C until after looking at the un
its documentation).
#1 and 2 above can be checked with a handheld meter set to volts. Red probe
to (+ supply) and Black probe to (- supply) on the EIS and repeated for re
mote measuring box.
If all is ok so far=2C you can now check that the ground and power connecti
ons are valid and stable=2C i.e.. not getting partial power or a partial gr
ound through another device that isn't the battery.
1a. Verifying that the ground is stable and valid: Black probe on handheld
meter(set to volts) to the battery ground post. Red probe to the negative
supply (GND) on the EIS. Repeat for the box under the cowl.
Both readings should effectively be zero. If not=2C it will show a connecti
on problem to the ground of the unit.
2a. Verify positive Supply is stable and valid. Red probe on handheld to
the battery positive terminal. Black probe on the handheld to the VCC/Suppl
y on the remote measuring box.
Repeat for EIS. Again=2C both readings should effectively be zero=2C since
a zero reading will show up the correct connection to the battery (readings
taken across the wire). Any measurements producing more than a few milliv
olts (maybe 10's of millivolts) are suspect. If invalid reading=2C it will
show a bad supply connection.
Note that if the voltage measurements in #1 and #2 gave the full battery vo
ltage=2C then 1a and 2a will probably be zero=2C unless something is changi
ng dynamically.
I hope some of this makes sense=2C
Greg
P.S. Is the old battery ground wire separate from the new ground wire? If
they are not connected to each other but still in place=2C try shorting the
two together to see if the readings go back to normal. NOT + to - or VCC t
o ground for goodness sakes=2C unless you want to see a lot of sparks! Just
connect new ground to the old ground=2C and the new vcc to the old vcc. Y
ou might try this one first=2C since it is easier. If the old battery wires
are taken out=2C then never mind.
From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-serv
er@matronics.com] On Behalf Of Karl Heindl
Sent: Thursday=2C July 29=2C 2010 2:28 PM
Subject: RE: Europa-List: Voltage reading of 25V
Greg=2C
The problem is with the EIS=2C only why did it coincide with a battery move
?
I checked the voltage in the panel and everything looks fine with the main
system.
The EIS gives good readings with the engine off. Thde only anomaly is the v
oltage which says 11.0=2C when it should be 12.5.
When I start the engine the readings go haywire: oil temp is below of what
is possible=2C pressure is 99=2C cht is 900C. After switching the EIS off a
nd on a few times the readings are good. But then the numbers start bouncin
g around again. Of course Grand Rapids are closed for Oshkosh until Monday
=2C and I am not sure what to do.
Any other ideas ?
Karl
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