Products > Test Equipment
121GW Voltage Readings WAY WAY Off. Not a 121GW general issue
TrickyT:
So glad this thread exists! I just had the same problem: voltage readings way off but low battery indicator normal. Problem was low batteries. Replaced those and all is fine again. This forum is such a good source of information! :clap:
BeBuLamar:
--- Quote from: NoisyBoy on April 28, 2020, 06:59:45 pm ---With reading this far off, the first thing I would check is to put in a fresh set of batteries.
--- End quote ---
I think the 121GW is a decent meter and any meter that can be considered decent can't have wrong reading when the battery goes low. It should display a low battery sign first then quit working altogether but not giving wrong reading. If it were to give wrong reading when the battery is low then you always have a chance ot have bad reading.
Since the OP said it's the battery problem then I would never consider this meter. It's simply junk.
Kleinstein:
A not working low battery detection is a defect that may go unnoticed for quite some time. Not sure if it is actually tested in production.
Normally it should not make a real difference, but there are different ways batteries go bad: Dry cells and many LI primary cells pretty much keep the no load voltage, but the internal resistance goes up. Alkaline cells stay relatively low resistance, but gradually get a lower voltage even at low load.
There is a slight chance the low bat detection may fail with dry cells.
TomKatt:
If the meter can become that inaccurate resulting from low battery voltage - that doesn't trigger the low battery warning - I'd have a problem relying on that meter going forward... Because you'd basically have to verify some test measurements every time you used it.
Like the OP, I've chased rabbit holes based on bad test result before. And once you've been burned like that, you tend to be gun shy going forward - especially if you're using the same test gear.
Something seems like a poor design issue going on here. If low battery voltage causes measurement errors to that degree, it should most certainly light the warning light.
BeBuLamar:
--- Quote from: TomKatt on July 08, 2024, 12:43:30 pm ---If the meter can become that inaccurate resulting from low battery voltage - that doesn't trigger the low battery warning - I'd have a problem relying on that meter going forward... Because you'd basically have to verify some test measurements every time you used it.
Like the OP, I've chased rabbit holes based on bad test result before. And once you've been burned like that, you tend to be gun shy going forward - especially if you're using the same test gear.
Something seems like a poor design issue going on here. If low battery voltage causes measurement errors to that degree, it should most certainly light the warning light.
--- End quote ---
In fact it should turn itself off before giving inaccurate readings.
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