Just bought a consumer grade multimeter, read carefully the instructions and tried some things. I know some very basic things about electricity, but I am unsure whether what I did was safe and didn't damage my multimeter or make it not work properly whatsoever.
After reading many forums I know it is relatively safe to measure voltage. As for current, I know you must be cautious.
What I did was this:
- connect the red probe to the 10A plug (2)
- put the dial switch of the multimeter to 200m (3)
- turn it on
- touch the red probe to the positive and black - to the negative of the AAA battery Nothing blew up. :)
So, here are my questions:
- Is it safe what i did for the multimeter?
- What does the reading 54.0 on the display mean?
- The red probe is in the 10A plug (2), so how am I supposed to interpret the scale to the switch? I mean, there is a position that says 20m/10A (4), so I assume that is 10A. But what about the next position 200m (3)? Is it 20A? Because, you know, they say when you don't know what you're measuring it's best to start with the largest scale and work your way down. So, what is the largest scale? Is it 20m/10A (4) or 200m (3)?
- What about the measurement when the dial switch is in position (4)?
- After all, I can't seem to understand how many miliamps is the current that my battery gives.
- Is it safe to measure if the probe is in port (1)?
- I know the multimeter didn't blow any fuse, but my OCD wants to know whether the tool suffers from these measurements.
- If that measurement is so bad for the battery and the multimeter, as many people say, then is it also bad (for the battery and for the tester) to measure batteries with this battery tester that I bought for a couple of bucks:
This concrete meter has a function "Battery test". See in the photos - the dial switch has a "BATT" section for 1.5V and 9V and the red probe must be in plug (1). However, when I test this same battery, it shows 1.27 - just the same as when I measure its voltage. The manual says (copy/paste): "In the measuring ranges BATT 1.5V and BATT 9V, the battery to be measured is charged by an internal resistance, thus you obtain practical information on the condition and functionality of the tested battery". I don't know if the translation of the manual to English is correct, but that's what it says. I still wonder if it does anything different, though. May be it just doubles the voltage meter for people who couldn't figure it out.
That being said, I wonder why don't all multimeters costing more than a few dollars have the same features that the Battery Tester 3 (costing $5) has.