Volt meter- Bat. test under load. What does this mean?

[Charlz]

My volt meter has a function for testing under load. It had two settings. 1.5v and 9v. The nine volt does nothing. The 1.5v takes .05v off the current reading my Kgo is showing of 3.94v, Showing 3.89. It does the same on a battery closer to 3.7. It always shaves .05v off. Wondering if there is an equation or what resistence it might be using as I've pitched the manual.

 

[Mylt1]

do you have a way to actually test with a load? pbisardo(sp?) uses a home made box that has DMM lead contacts along with a battery connector and 510 connector with a switch. switch off gives the battery voltage to the DMM leads and the switch on gives the voltage under the load of a carto. if you really want to know what the load is pulling i suggest you buy/build one of these test boxes.

 

[Sicarius]

Sounds like a simple battery testing function for Alkaline cells and at 1.5V setting you are out-of-ranging it. At 9V it will give incorrect readings as well I'm afraid.

 

[billo]

If you have, or can borrow, another meter that measures ohms. Simply put your meter in the "testing under load" position and measure its resistance between the meter leads with another meter. That will tell you the load resistance.

I can almost guarantee that it is not 2 or 3 ohms like an atomizer since that resistor would heat up (just like your atomizer does) a lot, and cause too much heat in the meter case. So they probably use a much higher-value resistor for the load.

 

[Charlz]

Interesting. Too bad my other meter isn't digital and only measures higher ohms but yeah. Figured it really was useless for my purposes. Thanks