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| 121GW Voltage Readings WAY WAY Off. Not a 121GW general issue |
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| BILLPOD:
Pressing the yellow 'Setup' button several times will give you several different results displayed in the upper-right corner of the display. One of the results is the voltage of the batteries in the meter. :horse: |
| TomKatt:
--- Quote from: BILLPOD on July 08, 2024, 01:57:55 pm ---Pressing the yellow 'Setup' button several times will give you several different results displayed in the upper-right corner of the display. One of the results is the voltage of the batteries in the meter. :horse: --- End quote --- Beyond putting the liability on the user rather than the device, at what battery voltage do you deem the readings produced by the meter inaccurate? The ability to view battery voltage is not an acceptable solution to me. |
| AVGresponding:
--- Quote from: Kleinstein on July 08, 2024, 06:58:11 am ---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. --- End quote --- The only way I can see this happening is if the battery monitoring either isn't real time, or is just not fit for purpose; if the no-load voltage is good, when you switch the device on the internal cell resistance will cause the terminal voltage to fall (in proportion to the current draw, obviously), and I can't understand how it could be simultaneously high enough to fool the low battery warning, and low enough to cause malfunction, unless the battery monitor is very badly implemented. |
| Kleinstein:
I am also not convinced that a wrong battery type is causing the problem. There is at least the possibility, if the current consumption is not constant, but higher during part of the conversion, compared to the battery check. It case this is an hardware issue (e.g. the battery testing part failing at really low battery) it may be worth testing the reaction to low battery voltage with a few different meters. It looks like most meters work OK. |
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