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Discussion Starter #1
I would like to know if you should connect the 12 volt input on the E-Meter
to the switched 12 vdc or straight to the 12 volt battery?



Thanks, Freddie

http://www.austinev.org/evalbum/899



http://www.southernev.com/dakotaev.htm







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Discussion Starter #3
Hello Freddie,

The E-meter 12 volt input should be un switch from any 12 volt source. If
you turn off the 12 volt to the E-meter, you will lose your data to it, just
like you have reset it.

There is a isolation module call a E-meter DC-DC converter that isolates the
12 volt input from a 12 volt battery or any other 12 volt source. You must
isolated both the positive and negative side of the 12 volt source. Some
prescalers for E-meters have this built in isolation module for a 12 volt
input.

Roland


----- Original Message -----
From: "Freddie Hartsell" <[email protected]>
To: <[email protected]>
Sent: Tuesday, October 16, 2007 10:49 AM
Subject: [EVDL] E-Meter question


> I would like to know if you should connect the 12 volt input on the
> E-Meter
> to the switched 12 vdc or straight to the 12 volt battery?
>
>
>
> Thanks, Freddie
>
> http://www.austinev.org/evalbum/899
>
>
>
> http://www.southernev.com/dakotaev.htm
>
>
>
>
>
>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>

_______________________________________________
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Discussion Starter #4
Depends on whether you have a high voltage pack, in
which case it is: neither, you have to connect the
E-meter to the *isolated* 12V supply that you use
dedicated for the E-meter, because the 12V negative
is connected to the pack negative on the E-meter,
so the entire E-meter is "hot" and you do not want
to ground your pack via your E-meter.
With either a 12V DC/DC or a cheap switching laptop
power supply for your E-meter, you have isolation to
avoid this problem.

Success,

Cor van de Water
Systems Architect
Proxim Wireless Corporation http://www.proxim.com
Email: [email protected] Private: http://www.cvandewater.com
Skype: cor_van_de_water IM: [email protected]
Tel: +1 408 542 5225 VoIP: +31 20 3987567 FWD# 25925
Fax: +1 408 731 3675 eFAX: +31-87-784-1130
Second Life: www.secondlife.com/?u=3b42cb3f4ae249319edb487991c30acb

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Freddie Hartsell
Sent: Tuesday, October 16, 2007 9:50 AM
To: [email protected]
Subject: [EVDL] E-Meter question

I would like to know if you should connect the 12 volt input on the E-Meter to the switched 12 vdc or straight to the 12 volt battery?



Thanks, Freddie

http://www.austinev.org/evalbum/899



http://www.southernev.com/dakotaev.htm







_______________________________________________
For subscription options, see
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Discussion Starter #5
Mine is powered off the bottom 2 batteries(24V) so it won't brown out. I
did this temporarily but it worked so well, i just left it.

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Discussion Starter #6
Ditto with my electric boat...

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of Jeff Shanab
Sent: Thursday, October 18, 2007 9:47 PM
To: [email protected]
Subject: Re: [EVDL] E-Meter question

Mine is powered off the bottom 2 batteries(24V) so it won't brown out. I
did this temporarily but it worked so well, i just left it.

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Discussion Starter #7
Yes, I have purchased the isolation module and I finally read the
instruction enough to find the correct answer. The meter has a sleep mode
that it will go in if I understand the instructions correctly. I was afraid
of leaving it connected and running my 12 volt battery dead.

Thanks, Freddie

http://www.austinev.org/evalbum/899
http://www.southernev.com/dakotaev.htm






-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of Roland Wiench
Sent: Thursday, October 18, 2007 9:14 AM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] E-Meter question

Hello Freddie,

The E-meter 12 volt input should be un switch from any 12 volt source. If
you turn off the 12 volt to the E-meter, you will lose your data to it, just

like you have reset it.

There is a isolation module call a E-meter DC-DC converter that isolates the

12 volt input from a 12 volt battery or any other 12 volt source. You must
isolated both the positive and negative side of the 12 volt source. Some
prescalers for E-meters have this built in isolation module for a 12 volt
input.

Roland


----- Original Message -----
From: "Freddie Hartsell" <[email protected]>
To: <[email protected]>
Sent: Tuesday, October 16, 2007 10:49 AM
Subject: [EVDL] E-Meter question


> I would like to know if you should connect the 12 volt input on the
> E-Meter
> to the switched 12 vdc or straight to the 12 volt battery?
>
>
>
> Thanks, Freddie
>
> http://www.austinev.org/evalbum/899
>
>
>
> http://www.southernev.com/dakotaev.htm
>
>
>
>
>
>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>

_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev



_______________________________________________
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Discussion Starter #8
It depends on how much drain you actually have with the meter and it's supply. It may be so insignificant that it hardly makes a difference.

My Saab has 6 computers, including the body computer which is on all the time. I throw a charger on every couple of weeks until I start driving itl, but it takes less than 5 minutes to fully recharge, so VERY low loss from anything I can see. You may be worried about something that is not an issue at all.

IMHO

Mark Ward
95 Saab 900 "Saabrina"
www.saabrina.blogspot.com



---- Freddie Hartsell <[email protected]> wrote:
> Yes, I have purchased the isolation module and I finally read the
> instruction enough to find the correct answer. The meter has a sleep mode
> that it will go in if I understand the instructions correctly. I was afraid
> of leaving it connected and running my 12 volt battery dead.
>
> Thanks, Freddie
>
> http://www.austinev.org/evalbum/899
> http://www.southernev.com/dakotaev.htm
>
>
>
>
>
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On Behalf
> Of Roland Wiench
> Sent: Thursday, October 18, 2007 9:14 AM
> To: Electric Vehicle Discussion List
> Subject: Re: [EVDL] E-Meter question
>
> Hello Freddie,
>
> The E-meter 12 volt input should be un switch from any 12 volt source. If
> you turn off the 12 volt to the E-meter, you will lose your data to it, just
>
> like you have reset it.
>
> There is a isolation module call a E-meter DC-DC converter that isolates the
>
> 12 volt input from a 12 volt battery or any other 12 volt source. You must
> isolated both the positive and negative side of the 12 volt source. Some
> prescalers for E-meters have this built in isolation module for a 12 volt
> input.
>
> Roland
>
>
> ----- Original Message -----
> From: "Freddie Hartsell" <[email protected]>
> To: <[email protected]>
> Sent: Tuesday, October 16, 2007 10:49 AM
> Subject: [EVDL] E-Meter question
>
>
> > I would like to know if you should connect the 12 volt input on the
> > E-Meter
> > to the switched 12 vdc or straight to the 12 volt battery?
> >
> >
> >
> > Thanks, Freddie
> >
> > http://www.austinev.org/evalbum/899
> >
> >
> >
> > http://www.southernev.com/dakotaev.htm
> >
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> > For subscription options, see
> > http://lists.sjsu.edu/mailman/listinfo/ev
> >
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev

_______________________________________________
For subscription options, see
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