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In Reply to: Multimeter and biasing amp posted by tz7 on May 27, 2012 at 11:05:48:
I think you mean "Micronta" which is branding that RadioShack used on a lot of their stuff. And based on the "wheel" you mentioned in your post, it is probably an older analog style multimeter with a needle rather than a digital multimetere (DMM).
You didn't mention the brand or model of the amp you are trying to bias. If you are truly needing to measure current in the 230 milli-ampere range, then setting the meter to it's 500ma scale will be just perfect.
However, when biasing many amps, you are not actually measuring current directly but instead measuring voltage across a resistor. In these cases, you will need to set the meter to a Voltage scale rather than a Current scale.
As for calibrating the meter, don't worry about that. I doubt that you own anything to calibrate the meter against. You can only assume that it is somewhat accurate.
I'm guessing that the "wheel" you talk about is for zeroing the meter needle when measuring resistance (Ohms).... and not applicable when measuring Voltage or Current.
If it were me, I would spend some money on an inexpensive digital multimeter (DMM) but if all you have is an analog meter, that will work.
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Follow Ups
- RE: Multimeter and biasing amp - AbeCollins 12:13:37 05/27/12 (5)
- RE: Multimeter and biasing amp - tz7 12:21:48 05/27/12 (4)
- RE: Multimeter and biasing amp - AbeCollins 12:53:14 05/27/12 (3)
- RE: Multimeter and biasing amp - tz7 12:59:17 05/27/12 (2)
- RE: Multimeter and biasing amp - wheezer 17:08:05 05/27/12 (0)
- RE: Multimeter and biasing amp - AbeCollins 15:25:36 05/27/12 (0)
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