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Fluke 28 II Battery life

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roli_bark:
Does anybody have access to the 28-II Service Manual ?

retiredcaps:

--- Quote from: roli_bark on September 06, 2016, 09:48:26 am ---Does anybody have access to the 28-II Service Manual ?

--- End quote ---
If by service manual, you mean schematics, bill of materials, theory of operation, etc like the olden days of the original Fluke 70 and 80 series, then NO.

AFAIK, Fluke has never released a service manual with any of those attributes listed above for any of their modern handheld meters.

roli_bark:
I have the same "bAtt" Alarm & DMM Total Freeze problem with a 28-II bought brand new in mid-2013.

It freezes over after either of the following:
1. Doing Continuity test after pressing the 'SOUND Beep' button, or
2. After pressing TWICE the 'SOUND Beep' button, or
3. After pressing the "Min/Max" button.

The only way to get it out of this catatonic state is to turn the DMM Off & then On again.
Fluke doesn't respond to my emails to Customer Service.

I was thinking about installing a 9v Li-Ion rechargeable battery to replace the 3 AA in the compartment.
A 9v Li-Ion consists of 2 Li-Ion cells, with 3.7v to 4.2v nominal voltage level each.
So the DMM will see a 7.4v to 8.4v on its DC supply.

Question is - Am I risking any damage to my 28-II DMM doing that ?
TIA


retiredcaps:

--- Quote from: roli_bark on September 07, 2016, 06:36:06 am ---I have the same "bAtt" Alarm & DMM Total Freeze problem with a 28-II bought brand new in mid-2013.
--- End quote ---
If you bought it brand new from an authorized dealer, you should get it replaced under Fluke warranty.  From other posts, Fluke will change out the PCB and do a calibration check.


--- Quote ---Fluke doesn't respond to my emails to Customer Service.
--- End quote ---
You should give them a phone call.  Perhaps your email ends up in the junk folder or is filtered out as spam?


--- Quote ---So the DMM will see a 7.4v to 8.4v on its DC supply.

Question is - Am I risking any damage to my 28-II DMM doing that ?

--- End quote ---
Don't know for sure, but the meter is expecting 4.5V from 3 AA and feeding it 7.4V or higher seems like a potentially bad idea.  If you do damage it with this modification, your chances for getting it repaired under warranty for free is close to zero.

The best course of action is to phone Fluke's support number.

roli_bark:
I see here several reports of the same.
Is there an official Fluke 28-II DMM recall for this specific problem ?

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