The little 9V alkaline battery in my Fluke LCD multimeter lasts almost "forever". It turns itself off if it is idle for a few minutes. The low battery indicator uses the low power LCD display, not an LED.
A bright LED will burn about 10mA, which I would not want to be giving away on any portable 9V instrument. If the LCD display is lit anyway, there is no added power wasted showing a low battery indicator there, but external LEDs are just a dumb design idea.
A bright LED will burn about 10mA, which I would not want to be giving away on any portable 9V instrument. If the LCD display is lit anyway, there is no added power wasted showing a low battery indicator there, but external LEDs are just a dumb design idea.
Sure, a bright LED will do that, but any portable equipment wouldn't want to consume 10mA for a dinky little LED. That is why they have LED's that require much less current; specifically for those applications.
Well what a complete load of shite !
You think I didn't read the manual properly ? Of course I did that was the first place I want . Not a mention of it . Then I went to their web site -Vendor and Manufacturer-nothing
So I ask here
And what do I get
A discussion on LED current consumption
As I said - Shite
Have a look at your posts and then tell me you are right and helpful.
Of course a fellow is going to get a bad reputation from such as you simply because you need a kick up the bum !
After some thought for anyone who is even remotely interested is it may be related to frequency measurement as when I bring it near a strong frequency source it lights up and if I put 1 probe on a transformer lamination it will go on (while it is switched off) and then if I switch the MM on and set to frequency I can measure the 50Hz cycle.
You think I didn't read the manual properly ? Of course I did that was the first place I want . Not a mention of it . Then I went to their web site -Vendor and Manufacturer-nothing
So I ask here.
You did not tell us that you had looked in the manual and the manufacturers website (who does make it, that is not obvious) we probably would not have suggested to RTFM.
Given the number of lazy students who come here asking for info which is as easily found as this discussion board, this is sadly a conditioned reaction. (Pavlov would enjoy it here!).
After some thought for anyone who is even remotely interested is it may be related to frequency measurement as when I bring it near a strong frequency source it lights up and if I put 1 probe on a transformer lamination it will go on (while it is switched off) and then if I switch the MM on and set to frequency I can measure the 50Hz cycle.
Havent got one of these myself, so i'm just guessing.
You mentioned it will light up near an ac source,
even if its switched off, so it might be for showing
wiring hidden in the wall.
When you find out its proper function, i would like to know.
Maybe the warning LED indicates that there is a high voltage nearby or is being measured. Maybe it is actually a neon bulb since it lights even with the MM turned off.
Good stuff .Now were getting somewhere anyway. I held it against the power point switched off and the bulb lit and stayed lit . Moving it across the wall (Masonry block) above the power point where the cable runs and this did not light it . Tapping it on the wall does light it for half a sec. All with the MM switched off.
Edit- I also put it next to a power cord with power flowing and it lit up from about 2 inches out
Its a bit bright for a LED and may well be a neon.If I tap it with my finger it lights for a sec also -its got me beat
I was playing with an Arduino starter kit today and got to looking at a vibration sensor. They seem to give a voltage increase as vibrations increase and I wonder if this is what it is.Would they build these into a multimeter and if so why?
I have just bought one for a present for a family member. I don't think it measures electrical noise at all . The led comes on when it senses vibration . With the switch either on or off it will light up . The meter was on the table and when I threw my keys on the table the led lit up . If you move the leads it lights up , you bump the unit it lights up . The instructions do not mention it , they do not even have it on the diagram which shows you the components with discriptions . Any help will be appreciated .