I got a Fluke 189 for Christmas and am wondering about this one feature, it has an option when you are in the DC volts mode where it will tell you the amount of AC in the DC. My question is, if I were to hook the same signal to a scope, would the value I see on the meter be the same amount of the ripple I see with the scope? I'm pretty sure that is the way it works but I ask because every PS I have measured so far all have the same value of 15 to 17 millivolts. Only one of those was under load at the time and even then it wasn't much of a load (25% of rated). Also it is supposed to have a DBm but I can't figure out how to get anything but DBV. I'm not even sure how it is going to read DBm since that is a power level and it would have to measure voltage and current to get a power level. I don't think it can do that but maybe it can.
- posted
18 years ago
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