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Mark Phillips in TN
Joined: 10 Jan 2006
Posts: 431
Location: Columbia, TN
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 Posted: Sat Jun 28, 2008 3:42 pm Post subject: Grand Rapids EIS & Hall Effect sonsor |
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In a message dated 6/28/2008 4:18:37 A.M. Central Daylight Time, ianwilson2(at)hotmail.com writes:
| Quote: | | What choice have any users of the EIS made on this sensor? |
My choice was to
Gas prices getting you down? Search AOL Autos for fuel-efficient used cars.
[quote][b]
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Mark Phillips in TN
Joined: 10 Jan 2006
Posts: 431
Location: Columbia, TN
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| Posted: Sat Jun 28, 2008 3:56 pm Post subject: Grand Rapids EIS & Hall Effect sonsor |
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In a message dated 6/28/2008 4:18:37 A.M. Central Daylight Time, ianwilson2(at)hotmail.com writes:
| Quote: | | What choice have any users of the EIS made on this sensor? |
(apologies for previous message- getting accustomed to new laptop!) 8-(
My choice was to run Main & E-bus feeds through current sensor. This way I can monitor loads during normal operation and educate myself on typical current requirements depending on equipment in use at any particular time. When & if it becomes necessary to operate on E-bus alone, I am familiar with requirements of various equipment and can adjust battery usage accordingly. I don't think that monitoring alternator output to be particularly useful as this is a system design issue which should be dealt with prior to operation. The EIS has its own low voltage alarm (to annunciate a failed alternator), so it would be redundant to use current sensor for this purpose.
Butcha never know- running the strobe leads through it might be kinda entertaining!
Mark
Gas prices getting you down? Search AOL Autos for fuel-efficient used cars.
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bferrell(at)123mail.net
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| Posted: Sat Jun 28, 2008 5:53 pm Post subject: Grand Rapids EIS & Hall Effect sonsor |
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How big is the doughnut on that hall-effect sensor? Can you get a #2
wire through there with the terminal on it?
Brett
Fiveonepw(at)aol.com wrote:
| Quote: | In a message dated 6/28/2008 4:18:37 A.M. Central Daylight Time,
ianwilson2(at)hotmail.com writes:
What choice have any users of the EIS made on this sensor?
(apologies for previous message- getting accustomed to new laptop!) 8-(
My choice was to run Main & E-bus feeds through current sensor. This
way I can monitor loads during normal operation and educate myself on
typical current requirements depending on equipment in use at any
particular time. When & if it becomes necessary to operate on E-bus
alone, I am familiar with requirements of various equipment and can
adjust battery usage accordingly. I don't think that monitoring
alternator output to be particularly useful as this is a system design
issue which should be dealt with prior to operation. The EIS has its
own low voltage alarm (to annunciate a failed alternator), so it would
be redundant to use current sensor for this purpose.
Butcha never know- running the strobe leads through it might be kinda
entertaining!
Mark
------------------------------------------------------------------------
Gas prices getting you down? Search AOL Autos for fuel-efficient used
cars <http://autos.aol.com/used?ncid=aolaut00050000000007>.
*
*
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klehman(at)albedo.net
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| Posted: Sat Jun 28, 2008 6:21 pm Post subject: Grand Rapids EIS & Hall Effect sonsor |
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Hello Ian
I put it in the alternator B+ line so it functions as a loadmeter. That
lets me see what any particular item draws as I switch it on or off, and
also how hard I'm working the alternator. There seems to be little value
in monitoring battery current especially if you have a low voltage
warning such as the one on your EIS. We know that the alternator is dead
if the voltage is below about 12.5 volts. That said, I did have an
occasion many years ago where a battery ammeter made it obvious that the
battery was being cooked by a failed carbon pile voltage regulator.
However the smell was probably the first indication noticed and these
days overvoltage protection is available to us and that will act
immediately resulting in - a low voltage warning. Your EIS also has
overvoltage warning.
Ken
ianwilson2 wrote:
| Quote: |
<ianwilson2(at)hotmail.com>
Hi All,
My GR EIS has the optional Hall Effect sensor that can be installed
in one of two locations and I'm after your advice about which would
be best on my Jab Z-20 installation. My firewall on the engine side
is as per Z-20.
The two options are either to monitor battery current (via the +
cable) or Alternator output. If I monitor the battery then if the
indication goes negative I'll know that my alternator has gone awol
and I have limited battery power to get back on the ground (this is
only a day/vfr machine). Would this be the best option as I can also
keep a track on battery charging?
What choice have any users of the EIS made on this sensor?
As the Jab has a PM alternator, does this influence anything here?
Many thanks in advance.
Ian
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nuckolls.bob(at)cox.net
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| Posted: Thu Jul 03, 2008 7:27 am Post subject: Grand Rapids EIS & Hall Effect sonsor |
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At 02:13 AM 6/28/2008 -0700, you wrote:
| Quote: |
Hi All,
My GR EIS has the optional Hall Effect sensor that can be installed in one
of two locations and I'm after your advice about which would be best on my
Jab Z-20 installation. My firewall on the engine side is as per Z-20.
The two options are either to monitor battery current (via the + cable) or
Alternator output. If I monitor the battery then if the indication goes
negative I'll know that my alternator has gone awol and I have limited
battery power to get back on the ground (this is only a day/vfr
machine). Would this be the best option as I can also keep a track on
battery charging?
What choice have any users of the EIS made on this sensor?
As the Jab has a PM alternator, does this influence anything here?
Many thanks in advance.
|
You make your choice and if you understand the
significance of the readings presented, then
ANY location is okay.
Ammeter readings are of no value to the pilot
in flight. The system is designed to support
all anticipated loads. Therefore, being able
to watch current draw is only a validation
of the design exercise that you should have
accomplished and trimmed up by the time your
fly-off period is completed.
After this time, the most critical feature to
monitor for the purpose of making in-flight
decisions is bus voltage. Some reading of actual
voltage in the cockpit is useful but the BEST
indicator is a low-volts warning system of
some variety that demands immediate attention
if the bus falls below 13.0 volts.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
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ianwilson2
Joined: 06 Jan 2008
Posts: 33
Location: France
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| Posted: Thu Jul 03, 2008 11:50 pm Post subject: Re: Grand Rapids EIS & Hall Effect sonsor |
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Thanks Ken, Bob and yes Brett, the sensor is just short of an inch round so a #2 wire & connector will fit.
Bob, if I say that I'm also installing the B&C Over/Under voltage sensor (BC207-1) and my GR EIS also has voltage warnings, would that lead you to a more definite conclusion as to where you would place the sensor?
Many thanks for all of your continued help, without which I'd be all at sea!
Ian
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