Re: [volt-nuts] 3458A calibration
Hi Greg,
Do you have to use the Fluke battery? Can't you use a regular one?
When I looked at Newark for 4 to 5 AH @ 6V lead acid, I found 6
batteries priced from $8.17 to $38.65 each. Digikey has two in the $10
to $12 range. In any case, you might find that shipping costs make a
mail order purchase unattractive. You should definitely compare prices
at a local battery store.
Ed
Greg Burnett wrote:
Re: Fluke p/n 739961 6V 4.5AH lead-acid batteries for Fluke 732A DC
Reference Standard
Does anyone know of an affordable substitute for these batteries? Fluke's
web site doesn't even recognize their own part number for these batteries,
but Newark lists them at $67.49 each. The unit uses qty 4, so at Newark's
price a set of four would cost $269.96!
According to Newark their physical size is 70x45x107mm.
The old set that were in my 732A are marked, "PT56 6V 5AH Made in China". So
someone installed these as substitutes. I searched the internet for "PT56"
but didn't see anything linking that number to a standard or generic
battery.
Thanks,
Greg
Hello Greg
I am sure that you can find a suitable replacement "sealed lead acid"
battery from a number of sources for considerably less than your quoted
amount. Due to the content, most of these are made in China or other Far
Eastern Country - regardless of the "name" of the manufacturer. I have two
Fluke 731B's, and these use Ni-Cad batteries. As we can see, these were
"dropped" as a back-up" power source, due to the corrosive damage they
caused to the PCB.
Regardless, I still get a very good performance from these "ancient" DC
standards. Incidentally, if anyone finds it hard to obtain information from
the Fluke US and European websites, try Fluke in Australia - much more
generous in manuals for older items.
Roy
From: "Greg Burnett" gbusg@comcast.net
To: "Discussion of precise voltage measurement" volt-nuts@febo.com
Sent: Tuesday, August 11, 2009 4:29 AM
Subject: [volt-nuts] Affordable batteries for Fluke 732A DC
ReferenceStandard?
Re: Fluke p/n 739961 6V 4.5AH lead-acid batteries for Fluke 732A DC
Reference Standard
Does anyone know of an affordable substitute for these batteries? Fluke's
web site doesn't even recognize their own part number for these batteries,
but Newark lists them at $67.49 each. The unit uses qty 4, so at Newark's
price a set of four would cost $269.96!
According to Newark their physical size is 70x45x107mm.
The old set that were in my 732A are marked, "PT56 6V 5AH Made in China".
So
someone installed these as substitutes. I searched the internet for "PT56"
but didn't see anything linking that number to a standard or generic
battery.
Thanks,
Greg
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----- Original Message -----
From: "Greg Burnett" gbusg@comcast.net
To: "Discussion of precise voltage measurement" volt-nuts@febo.com
Sent: Monday, August 10, 2009 11:29 PM
Subject: [volt-nuts] Affordable batteries for Fluke 732A DC
ReferenceStandard?
Re: Fluke p/n 739961 6V 4.5AH lead-acid batteries for Fluke 732A DC
Reference Standard
Does anyone know of an affordable substitute for these batteries? Fluke's
web site doesn't even recognize their own part number for these batteries,
but Newark lists them at $67.49 each. The unit uses qty 4, so at Newark's
price a set of four would cost $269.96!
According to Newark their physical size is 70x45x107mm.
The old set that were in my 732A are marked, "PT56 6V 5AH Made in China".
So
someone installed these as substitutes. I searched the internet for "PT56"
but didn't see anything linking that number to a standard or generic
battery.
Thanks,
Greg
Greg,
These are plain 6-volt sealed lead-acid (SLA) batteries, with an obvious 5AH
rating. Just get on the web and find 6V/5AH SLA batteries with the same
dimensions and terminals, and you're all set.
Some battery vendors are:
http://www.batterywholesale.com/
http://www.batterystation.com/gelcell.htm
http://www.nicdladyonline.com/shop/?shop=1&cat=17
http://www.arizonabattery.com
Google for SLA Batteries
Dave M
masondg44 at comcast dot net
I went to a bookstore and asked the saleswoman, "Where's the
self-help section?" She said if she told me, it would defeat the
purpose.
If you are in the US, you might try Batteries Plus for a local option
(if they have one near you)
I've had good luck with them for replacements for my UPS batteries.
theyare not as cheap as online places, but there's no shipping and you
get instant gratification.
-Eric
On Tue, Aug 11, 2009 at 7:04 AM, Dave Mmasondg44@comcast.net wrote:
----- Original Message ----- From: "Greg Burnett" gbusg@comcast.net
To: "Discussion of precise voltage measurement" volt-nuts@febo.com
Sent: Monday, August 10, 2009 11:29 PM
Subject: [volt-nuts] Affordable batteries for Fluke 732A DC
ReferenceStandard?
Re: Fluke p/n 739961 6V 4.5AH lead-acid batteries for Fluke 732A DC
Reference Standard
Does anyone know of an affordable substitute for these batteries? Fluke's
web site doesn't even recognize their own part number for these batteries,
but Newark lists them at $67.49 each. The unit uses qty 4, so at Newark's
price a set of four would cost $269.96!
According to Newark their physical size is 70x45x107mm.
The old set that were in my 732A are marked, "PT56 6V 5AH Made in China".
So
someone installed these as substitutes. I searched the internet for "PT56"
but didn't see anything linking that number to a standard or generic
battery.
Thanks,
Greg
Greg,
These are plain 6-volt sealed lead-acid (SLA) batteries, with an obvious 5AH
rating. Just get on the web and find 6V/5AH SLA batteries with the same
dimensions and terminals, and you're all set.
Some battery vendors are:
http://www.batterywholesale.com/
http://www.batterystation.com/gelcell.htm
http://www.nicdladyonline.com/shop/?shop=1&cat=17
http://www.arizonabattery.com
Google for SLA Batteries
Dave M
masondg44 at comcast dot net
I went to a bookstore and asked the saleswoman, "Where's the
self-help section?" She said if she told me, it would defeat the
purpose.
volt-nuts mailing list -- volt-nuts@febo.com
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https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
--
--Eric
Eric Garner
...Great information and suggestions by everyone! (I'd not thought of all
those possibilities.)
Now the ball is in my court to measure the old batteries' outside
dimensions, tab dimensions and tab positions - and then narrow the choice
down to batteries that will fit. One thing I've learned from this so far is
that apparently each battery manufacturer (or re-seller) uses their own
custom battery part number designation. Too bad they didn't do a better job
of standardizing?
One important consideration is that the battery connection tabs must align
with the corresponding holes in Fluke's internal aluminum top plate. (This
wouldn't be a consideration for the vast majority of similar applications,
but in this case Fluke's internal aluminum plate "expects" the tabs to be
precisely positioned.)
Thanks John, Ed, Roy, Dave, Mark and Eric for all your help!
Greg
Many battery suppliers have cross-reference charts. That might make life
easier.
-John
============
...Great information and suggestions by everyone! (I'd not thought of all
those possibilities.)
Now the ball is in my court to measure the old batteries' outside
dimensions, tab dimensions and tab positions - and then narrow the choice
down to batteries that will fit. One thing I've learned from this so far
is
that apparently each battery manufacturer (or re-seller) uses their own
custom battery part number designation. Too bad they didn't do a better
job
of standardizing?
One important consideration is that the battery connection tabs must align
with the corresponding holes in Fluke's internal aluminum top plate. (This
wouldn't be a consideration for the vast majority of similar applications,
but in this case Fluke's internal aluminum plate "expects" the tabs to be
precisely positioned.)
Thanks John, Ed, Roy, Dave, Mark and Eric for all your help!
Greg
Two more things to keep in mind...
I was looking for a replacement for an old 12V 5AH gel cell. It turnes
out that newer batteries are specified differently than the old ones
were. To get a new battery the same physical size as the old one, I had
to look at 12V 7AH batteries!
If you're considering a local purchase, take the battery carrier,
holder, unit, whatever with you to the battery store so that you can
test the fit of the batteries.
Ed
Greg Burnett wrote:
...Great information and suggestions by everyone! (I'd not thought of all
those possibilities.)
Now the ball is in my court to measure the old batteries' outside
dimensions, tab dimensions and tab positions - and then narrow the choice
down to batteries that will fit. One thing I've learned from this so far is
that apparently each battery manufacturer (or re-seller) uses their own
custom battery part number designation. Too bad they didn't do a better job
of standardizing?
One important consideration is that the battery connection tabs must align
with the corresponding holes in Fluke's internal aluminum top plate. (This
wouldn't be a consideration for the vast majority of similar applications,
but in this case Fluke's internal aluminum plate "expects" the tabs to be
precisely positioned.)
Thanks John, Ed, Roy, Dave, Mark and Eric for all your help!
Greg
volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.