Well the idea behind these more powerfull RS models is that they have fan,
so they are supposed to work for extended periods without overheating (and
exploding). Though the RS is prone to failing, blasting transistors, even
with just the basic internal pack (as it is just not robust enough and the
protection circuitry is often too slow to survive what Smart-UPS survives
over and over).
As for meters, there are very basic meters, pretty much childs toy, and than
there are very expensive pro meters. I only know about one taiwanese meter
comparable to the japanese ones and it costs 2/5 their price, but is still
expensive. There is no reason why this should not be accurate, accumulator
is not that much far from capacitor (dry one, but wet behave very much the
same) and the technique to measure them is often similar. What's more
important is that ESR is only one of few important parameters and alone it
won't tell that much.
--
S uctivÃœm pozdravem/best regards,
Pavel BoÄek
Jabber: ***@jabber.cz
+420 739 190 151
http://www.hwworld.cz (kondenzátory, akumulátory, baterie aj./capacitors and
more)
http://www.hardwareinsights.com (power supply reviews and more)
---------- Původnà e-mail ----------
Od: Ted Mittelstaedt <***@mittelstaedt.us>
Komu: apcupsd-***@lists.sourceforge.net
Datum: 19. 5. 2017 9:41:14
PÅedmÄt: Re: [Apcupsd-users] BR1500G with BR24BPG not being recognized.
"
Hi All,
OK let's have some discussion on APC ups models.
The BR24BPG battery pack appears to only be for use with the APC Backups
1500 RS. This is buried in the user manual here:
http://www.apc.com/salestools/EALN-7V5MXA/EALN-7V5MXA_R2_EN.pdf
(http://www.apc.com/salestools/EALN-7V5MXA/EALN-7V5MXA_R2_EN.pdf)
Here is a picture of a BackUPS 1500 RS:
http://www.apc.com/shop/us/en/products/APC-BACK-UPS-RS-1500VA-LCD-120V/P-BR
1500LCD?isCurrentSite=true
(http://www.apc.com/shop/us/en/products/APC-BACK-UPS-RS-1500VA-LCD-120V/P-BR1500LCD?isCurrentSite=true)
Here is a picture of a BackUPS 1500 G:
http://www.apc.com/shop/us/en/products/APC-Power-Saving-Back-UPS-Pro-1500/P-
BR1500G
(http://www.apc.com/shop/us/en/products/APC-Power-Saving-Back-UPS-Pro-1500/P-BR1500G)
Now, with that said, the 1500RS is listed as discontinued and the 1500G is
listed as it's replacement. SO, supposedly it would work - except that it's
own sales docs say that it won't - so I really think you need to contact
APC's technical support.
IMHO, if the runtime on your BR1500G does NOT increase when you plug in a BR
24BPG external battery pack then it won't work.Â
OVERALL, I DO NOT EVER recommend attempting to plug in additional or
external battery packs to a BackUPS. The BackUPS line is, as Pavel said,
not much better built than the older dumb BackUPS. My own experience with
the BackUPS line is that when it comes to apcupsd, sometimes they work -
sometimes they don't. I have had BX1500Gs work, and BackUPS ESs work, with
apcupsd. I've also had BackUPS ES's -not- work.
Now as for the batteries themselves-
The BT24BPG uses a RBC11 battery pack. But, all that this is, is 2 12v 18ah
lead acid gel cells stuck together with mounting tape and the front
terminals connected together and the back terminals connected to a plug.
12v is resting battery voltage. Not 13, not 12.7, not 14.  12.0v! I have
had MANY YEARS experience with lead-acid batteries and I assure you YOU
CANNOT tell how good a battery is by measuring terminal voltage. I also do
NOT trust those "internal resistance" digital battery testers. In my
experience the only way to test is with a resistance pile. For $20USD you
can buy a 100 amp tester for testing car batteries with a meter and
resistance pile in it. Take a fresh lead acid gel cell, make sure it's
fully charged, and apply the tester, then tap the test switch for a second
and observe the meter needle. Then do the same test to your used/charged
batteries. If you don't get substantively the same meter deflection - the
battery is shot.
You can also easily use an ordinary auto resistance light bulb for battery
testing along with a volt-ohm meter.
Ted
On 5/18/2017 9:08 PM, Pavel BoÄek wrote:
"
Not sure about this G version, but Back-UPS RS used to be just a dumb line-
interactive unit. I think this series only has display, the electronics is
slightly different but I did not get the impression it is any more
inteligent or better build. After all, especially the BR1500G model drops
like flies with F02 error IIRC.
Maybe, just maybe, if you do runtime calibration, or full discharge, than
something would change. But the Back RS indeed had no such capability as the
Smart series, it was more or less just guessing runtime from the wind
blowing than actually measuring anything.
That BR24BPG pack is original? I can imagine they don't sell whole lot of
them, APC is about 2-3times overpriced as those are just Long (or something
similar) batteries with expensive cable and sticker hiding the true
manufacturer. I would never ever buy something like that myself when all you
need is to get the cable and even if you buy Panasonic than, you usually
still save considerable amount. Could indeed be bad from old age, lead-acid
should hold the charger over 13 V (open-circuit) for a "little" while after
full recharge. The other question is if it is actually fully chargerd
already, the charger PSU in these units is not particularly powerfull and it
takes ages to charge both internal and external batteries.
--
S uctivÃœm pozdravem/best regards,
Pavel BoÄek
Jabber: ***@jabber.cz(mailto:***@jabber.cz)
+420 739 190 151
http://www.hwworld.cz(http://www.hwworld.cz) (kondenzátory, akumulátory,
baterie aj./capacitors and more)
http://www.hardwareinsights.com(http://www.hardwareinsights.com) (power
supply reviews and more)
---------- Původnà e-mail ----------
Od: whitekn3 <***@fessenden.com>(mailto:***@fessenden.com)
Komu: apcupsd-***@lists.sourceforge.net
(mailto:apcupsd-***@lists.sourceforge.net)
Datum: 18. 5. 2017 23:10:42
PÅedmÄt: [Apcupsd-users] BR1500G with BR24BPG not being recognized.
"I have an APC BR1500G with an external BR24BPG backup pack. Even after
doing
the "Brain Dead" on the main unit the run time does not change when I plug
in the external battery pack.
Is this normal? If not, could it be a bad battery pack?
I am not seeing any errors or indications of battery problems. (Manual Self
test passes, Auto-test passes.) However, when the power recently went off
run time was very short! (8 minutes at 200 watts load).
I did buy a new APC replacement pack for the main unit, and that did not
help. I am also testing the batteries from the external unit and they seem
weak to me. (12.3v to 12.4v when I first got the case open after unplugging
it from BR1500. 13.3v just off charger, dropping to 12.7v after a short
time.)
--
View this message in context: http://apcupsd-ups-control-software.10985.n7.
nabble.com/BR1500G-with-BR24BPG-not-being-recognized-tp10044.html
(http://apcupsd-ups-control-software.10985.n7.nabble.com/BR1500G-with-BR24BPG-not-being-recognized-tp10044.html)
Sent from the Users mailing list archive at Nabble.com.
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