One of the things I've inherited from my late grandfather is an old Radio Shack analog multimeter. From the few things I've measured and understood, it seems to be surprisingly accurate. However, I'm a little confused as to some aspects of reading current. R and V seem pretty easy, but for some reason, current hasn't fully "clicked" yet.
The manual is sparse, and does not explain which scale on the VU to look at when using different ranges. I'm sorta' getting it piece by piece, but there are still a couple gaps in fully understanding this thing.
Here are the 4 DC scales (used for both I and V):
0 - 50 - 100 - 150 - 200 - 250
0 - 25 - 50 - 75 - 100 - 125
0 - 10 - 20 - 30 - 40 - 50
0 - 2 - 4 - 6 - 8 - 10
The ranges for DC current are:
10A (has a seperate + input for this range), 500mA, 50mA, 5mA, and 50uA.
There is also a range doubling switch.
Here's my understanding thus far, and a couple questions:
Say for example, to read up to 10A, naturally I'd use the 10A range, and look at the 0 - 10 scale on the meter.
Reading up to 50mA, I assume use the 50mA range, and look at the 0 - 50 scale.
BUT, how do I read everything else from 50 - 500mA? I know it's easy as pie, and the answers are staring me in the face, but it just hasn't "clicked" yet. Any help would be greatly appreciated.
The manual is sparse, and does not explain which scale on the VU to look at when using different ranges. I'm sorta' getting it piece by piece, but there are still a couple gaps in fully understanding this thing.
Here are the 4 DC scales (used for both I and V):
0 - 50 - 100 - 150 - 200 - 250
0 - 25 - 50 - 75 - 100 - 125
0 - 10 - 20 - 30 - 40 - 50
0 - 2 - 4 - 6 - 8 - 10
The ranges for DC current are:
10A (has a seperate + input for this range), 500mA, 50mA, 5mA, and 50uA.
There is also a range doubling switch.
Here's my understanding thus far, and a couple questions:
Say for example, to read up to 10A, naturally I'd use the 10A range, and look at the 0 - 10 scale on the meter.
Reading up to 50mA, I assume use the 50mA range, and look at the 0 - 50 scale.
BUT, how do I read everything else from 50 - 500mA? I know it's easy as pie, and the answers are staring me in the face, but it just hasn't "clicked" yet. Any help would be greatly appreciated.