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Author Topic: low voltage tester  (Read 764 times)

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Offline wurzal

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low voltage tester
« on: May 14, 2018, 21:10:11 PM »
hi chaps

I have been given a low voltage tester with buzzer alarm but when I plug it into a lipo the buzzer goes and the
all voltage is zero and the cells show zero.

There is a button on the end for setting it (push key to start setting mode)

Please help on how do you do this.

The lipo has got good voltage

Offline pooh

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Re: low voltage tester
« Reply #1 on: May 15, 2018, 17:33:41 PM »
a bit more product detail would help, perhaps a web page, instruction sheet, photo

I have an absurd test screwdriver, it has battery built in and an LED comes on at unexpected situations - for example if I touch the tip, touch the tip on a piece of metal, touch it on a "live" circuit. Totally useless!

The old "neon" screwdriver did at least reliably show voltages in excess of around 90 volts, so was good for checking if a circuit was live. Now I only trust my (expensive professional) digital multimeter, and never take the word of someone else to say a circuit is "live". On two occasions I have been told, by an electrician, that the box I wanted to work on was switched off - only to find in one case 230vac and the other 415vac well and truly turned on !

Remember a LiPo is good for several amps, if you don't know what the test unit does, either find out from the instructions, or bin it. You can buy hobby-grade multimeters for less than 10, and they will come with instructions (though perhaps in Chinese...)
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Offline Bad Raven

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Re: low voltage tester
« Reply #2 on: May 17, 2018, 06:10:34 AM »
I'm assuming this is the Great Power unit with a transluscent grey case.

Every time the end button is pressed it goes into alarm setting on the first press, then further presses made quickly (or it times out) cycle round the actual alarm setting in .1v steps from OFF upwards.  When the level you want is reached, pause and it will revert to live monitoring with your alarm in background.
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