gmcjetpilot(at)yahoo.com
Guest
|
 Posted: Thu Mar 30, 2006 4:37 am Post subject: current sensor (GRT hall effect current sensor) |
 |
|
Allan:
I can assure you the lack of reply has nothing to do with wanting to sell
you something. They are slow to respond sometimes and it is Sun and
Fun time. However if you must get them, CALL them and email them both.
Sandy may be out sick or helping Greg get ready for S&F. I do NOT work
for them or personally know them. I have just had a eis4000 and several
earlier models going back at least 15 years. Great products and super nice
folks.
They make the best products at very good prices. Nuff said on GRT, that
is the reason they have not responded yet.
Now for your Hall effect. The three wires are output, ground and power
supply.
You should be able to get it to work. There is no guarantee it will work,
but the EIS is pretty flexible and hall effect sensor have pretty standard
specs. Once you get it figured out GRT can give you the settings or I.
You have to tell me or GRT what its output and range is. With that info
you can figure out the Offset factor (OF) and Scale factor (SF) to make it
work (read correctly). As you know the Aux inputs have these two factors.
You also have to set the EIS resolution (decimal place) and if its forward
sensing (see your EIS manual).
So contact the company that sold you the hall effect and find out the
specs, or you could test it. The supply power to the hall effect,
is usually nominally 5 volts, not sure about the one you have. The
power input to most hall effect sensors is +4.5v to + 8.0v DC. The EIS
has an on-board 4.8volt power supply to power aux sensors. (see your
EIS manual).
Depending on the capacity of your hall effect (25, 50 or 100 amps) it will
produce a linear voltage, mill volts, on the output based on how much
current is passing thru the wire you are measuring. I am guessing you
have an AMPLOC brand. Model? AMP100 or ZAP50? Both sensors
read to 100 amps linearly. (total guess call them).
This mV output is read and converted to a reading on the EIS4000.
Warning the max Aux input to the eis4000 is 5.5 volts. Any more than
that will damage it. Depending on the Hall Effect sensor, the typical out
put will be between 0.9V to 1.9V so this is not an issue. However NEVER
pump 12volts direct into an aux input. I never did it but the manual says it
is a bad thing.
Write me off list if you want more info. You NEED:
Rated current capacity capacity
Peek voltage at rated current
What range you are trying to measure
You need to know supply voltage, the EIS 4.8 volts will likely do fine.
Depending on what model EIS (software version) may affect settings.
George
Subject: current sensor
From: "Allan Aaron" <aaaron(at)tvp.com.au>
<aaaron(at)tvp.com.au>
I have a GRT EIS4000 and want to add the ammeter function. I
forgot to buy the sensor from GRT but I do have a spare hall effect
sensor from the previous Rocky Mountains EIS I was using. I'm
wondering what the voltage (I assume) output of these devices is?
The RkyMtns one has three input wires - is anyone familiar with
these and how I might connect the sensor to read volts into the
GRT?
I've emailed GRT a couple of times but got no reply - I guess its
understandable that they want to sell me the $60 sensor rather than
have me use the one I have.
Thanks for your suggestions.
Allan
---------------------------------
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
