Wasn't sure where to put this so please move this if it is wrong. This is my first post, haha.
Anyway, I'm at a loss with what to do with my multimeter. I have a Greenlee DM-45. I've been trying to do simple example circuits but I've lost hope in building them because I can't get good readings from my multimeter.
Basically, I have a 9V battery (measures 9.12V at the moment) connected in series with a 470 ohm resistor. By ohm's law I should be drawing 19 mA of current at any given time.
If I place the multimeter in series with the circuit I get a reading of 0.016A using the A function and a reading of 0.16 mA using the mA function. Nothing is right. the A function shows 16 mA but the mA shows a 16/100s of a milliamp? That makes no sense.
Figuring I blew a fuse at one point or another I decided to switch over to resistance measurement and touch the probes together. 0.8 ohms. Seems like the fuse is okay.
My next test was to put an LED in series with the resistor. Without the multimeter in series the LED will light up just fine, if I place the multimeter in series with the resistor and the LED the LED will not light up. That's odd.
My final test was to try a 2.2 KOhm resistor alone in series with a 9V battery. I should be getting around 0.004A. Instead I get the same reading as above - 0.016A.
So all I've got from this is that my multimeter is acting like there's some internal resistance, but when I measure the internal resistance using the probe-touching technique I don't get a "fuse blown" reading. I wouldn't think a fuse was bad anyway because I'm getting something out of the current measuring function.
I'm at a loss. All other functions work (voltage, resistance, etc). This thing is junk as far as I'm concerned. I'm about ready to just shell out for a new multimeter because this thing is ruining any fun I was ever planning on having with my breadboard. Can anyone help me here? I don't know where to go from here.
Thank you!
Anyway, I'm at a loss with what to do with my multimeter. I have a Greenlee DM-45. I've been trying to do simple example circuits but I've lost hope in building them because I can't get good readings from my multimeter.
Basically, I have a 9V battery (measures 9.12V at the moment) connected in series with a 470 ohm resistor. By ohm's law I should be drawing 19 mA of current at any given time.
If I place the multimeter in series with the circuit I get a reading of 0.016A using the A function and a reading of 0.16 mA using the mA function. Nothing is right. the A function shows 16 mA but the mA shows a 16/100s of a milliamp? That makes no sense.
Figuring I blew a fuse at one point or another I decided to switch over to resistance measurement and touch the probes together. 0.8 ohms. Seems like the fuse is okay.
My next test was to put an LED in series with the resistor. Without the multimeter in series the LED will light up just fine, if I place the multimeter in series with the resistor and the LED the LED will not light up. That's odd.
My final test was to try a 2.2 KOhm resistor alone in series with a 9V battery. I should be getting around 0.004A. Instead I get the same reading as above - 0.016A.
So all I've got from this is that my multimeter is acting like there's some internal resistance, but when I measure the internal resistance using the probe-touching technique I don't get a "fuse blown" reading. I wouldn't think a fuse was bad anyway because I'm getting something out of the current measuring function.
I'm at a loss. All other functions work (voltage, resistance, etc). This thing is junk as far as I'm concerned. I'm about ready to just shell out for a new multimeter because this thing is ruining any fun I was ever planning on having with my breadboard. Can anyone help me here? I don't know where to go from here.
Thank you!