What is your favorite DMM for workplace bench top use? Keithley, Agilent, something else? Keysite, with whom I have no experience? Is BK Precision up to good quality these days?
I need voltage and 2 & 4 wire resistance, and I would probably occasionally use current, capacitance and inductance, but they’re not critical. I do have another meter for measuring down in the microohms and yet another for up in the teraohms, and neither of those needs are high precision, so I don’t think extreme resistance range is that critical. I don’t remember ever measuring voltages over 240 or so. But I have wished for good accuracy in millivolt and sometimes even microvolt ranges.
My preferences are for accuracy (including short and long term stability) and reliability and simplicity of use. I’m thinking maybe 0.01%, 5 or 6 digits. It’s hard to say exactly how much accuracy I need, because it is hard to predict where my future research will take me, but I do keep bumping into worries and limitations with the handheld DMMs I have available, whether accuracy or even just precision and short term stability. I think it’d be preferable to have autoranging with manual override. I actually would like to avoid the more feature rich meters, as their programming and user interface is so much work to learn and remember, and they tend to get into weird modes I don’t recognize. I’m not really interested in logging data or interfacing with computers with the meter (I do a great deal of this but with other dedicated equipment).
I have a Fluke handheld, an 87 I think (maybe it was $300 or $400). It’s at least around 5-10 years old and it’s never been recalibrated. In fact I don’t even know if they recalibrate handheld DMMs, or if the cost is so high one just replaces them. And I need it; I might want to buy another DMM just so I am not without one before sending the old one out. The other day I did a voltage measurement inter-comparison between four handheld DMMs, none of them new or recently calibrated, and without a voltage calibrator (just a 0-30 VDC supply). They all agreed within 1% but not 0.1%.
I’m anticipating $600 to $1500 price range.
What are your favorite models or brands, and why?