Fluke 8050A - MPU failure

[Jeff Liebermann]

On Mon, 26 Nov 2012 06:23:02 -0500, JW <none@dev.null> wrote:

One of the earlier fluke meters (I don't remember which one) had a battery
that was required to be installed in order to regulate the power supply.
If you took out the battery pack and tried to operate the meter on AC
power, you'd blow the damn thing! Was the 8050A that meter?

It's not any of the one's that I have. I've run all of them without
batteries and none seem to have blown up. The 8050A doesn't work
without the battery, but I don't think I've done any damage. The
replacement batteries haven't arrived yet so I can't test them fully.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[JW]

On Mon, 26 Nov 2012 10:06:31 -0800 Jeff Liebermann <jeffl@cruzio.com>
wrote in Message id: <7qb7b896o9h8b147stq7gferpll05mtjau@4ax.com>:

On Mon, 26 Nov 2012 06:23:02 -0500, JW <none@dev.null> wrote:

One of the earlier fluke meters (I don't remember which one) had a battery
that was required to be installed in order to regulate the power supply.
If you took out the battery pack and tried to operate the meter on AC
power, you'd blow the damn thing! Was the 8050A that meter?

It's not any of the one's that I have. I've run all of them without
batteries and none seem to have blown up. The 8050A doesn't work
without the battery, but I don't think I've done any damage. The
replacement batteries haven't arrived yet so I can't test them fully.

Huh. I thought it was the 8050A. In my manual there's a "WARNING DO NOT
OPERATE YOUR 8050A-01 WITH THE BATTERIES REMOVED."

 

[Jeff Liebermann]

On Tue, 27 Nov 2012 06:03:28 -0500, JW <none@dev.null> wrote:

On Mon, 26 Nov 2012 10:06:31 -0800 Jeff Liebermann <jeffl@cruzio.com
wrote in Message id: <7qb7b896o9h8b147stq7gferpll05mtjau@4ax.com>:

On Mon, 26 Nov 2012 06:23:02 -0500, JW <none@dev.null> wrote:

One of the earlier fluke meters (I don't remember which one) had a battery
that was required to be installed in order to regulate the power supply.
If you took out the battery pack and tried to operate the meter on AC
power, you'd blow the damn thing! Was the 8050A that meter?

It's not any of the one's that I have. I've run all of them without
batteries and none seem to have blown up. The 8050A doesn't work
without the battery, but I don't think I've done any damage. The
replacement batteries haven't arrived yet so I can't test them fully.

Huh. I thought it was the 8050A. In my manual there's a "WARNING DO NOT
OPERATE YOUR 8050A-01 WITH THE BATTERIES REMOVED."

I never read the manual until after I get into trouble. I tried one
of mine without the batteries, and as expected, it didn't work. The
batteries arrived yesterday. I accidentally ordered smaller size
batteries, which were cheaper, and made them fit. One 8050a now works
fine. No damage. I'll test the other 8050A in the next few days.

In case you missed it, modifications to run the 8050A without
batteries:
<http://www.eevblog.com/forum/projects-designs-and-technical-stuff/fluke-8050a-repair/msg79394/?PHPSESSID=922877c77efd0bbeb2ab4f906b1369ac#msg79394>


--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[JW]

On Tue, 27 Nov 2012 08:50:08 -0800 Jeff Liebermann <jeffl@cruzio.com>
wrote in Message id: <gdr9b81a4ggervuq6h1osr5dfom2fi41la@4ax.com>:

On Tue, 27 Nov 2012 06:03:28 -0500, JW <none@dev.null> wrote:

On Mon, 26 Nov 2012 10:06:31 -0800 Jeff Liebermann <jeffl@cruzio.com
wrote in Message id: <7qb7b896o9h8b147stq7gferpll05mtjau@4ax.com>:

On Mon, 26 Nov 2012 06:23:02 -0500, JW <none@dev.null> wrote:

One of the earlier fluke meters (I don't remember which one) had a battery
that was required to be installed in order to regulate the power supply.
If you took out the battery pack and tried to operate the meter on AC
power, you'd blow the damn thing! Was the 8050A that meter?

It's not any of the one's that I have. I've run all of them without
batteries and none seem to have blown up. The 8050A doesn't work
without the battery, but I don't think I've done any damage. The
replacement batteries haven't arrived yet so I can't test them fully.

Huh. I thought it was the 8050A. In my manual there's a "WARNING DO NOT
OPERATE YOUR 8050A-01 WITH THE BATTERIES REMOVED."

I never read the manual until after I get into trouble.

Same with me, unless there's a chance of damage *and* it's worth over
$500.

I tried one
of mine without the batteries, and as expected, it didn't work. The
batteries arrived yesterday. I accidentally ordered smaller size
batteries, which were cheaper, and made them fit. One 8050a now works
fine. No damage. I'll test the other 8050A in the next few days.

In case you missed it, modifications to run the 8050A without
batteries:
http://www.eevblog.com/forum/projects-designs-and-technical-stuff/fluke-8050a-repair/msg79394/?PHPSESSID=922877c77efd0bbeb2ab4f906b1369ac#msg79394

Thanks, but I wouldn't be bothered. They aren't worth squat, and I already
have a Keithley 2000.