Well maybe like my old RS multimeter with RS232 port. I checked it against our instrumentation guys Flukes at work and it matched. They did work where they had to have certs for recal once a year. I checked by cheap RS meter when it was a bit over 10 years old and it still matched. I wouldn't claim the RS was as good as a Fluke, but after comparing I felt pretty comfortable for my personal audio use.
Yes, those meters have good shelf life. When I worked at a metrology lab that also bought used electronics lab gear and refurb'd it and calibrated the stuff for resale. They told me the Flukes, Keithley and HP digital meters etc basically needed a check and cleaning and they where rarely really out of calibration.
Most Kill-a-Watt wallplugs also measures power factor... which is telling.
Would the use of such a 'consumer-grade' measuring device be considered ASR's... ummmmm... antithesis?
[vis-a-vis AP]
That and I have seen several reviewers use a Kill-a-Watt and refer to using that that in the reviews.
My then 40 year old Simpson 260 also matched reasonably within its capabilities. I was surprised its response is flat (-3db) to like 150 khz on small voltages, and it was pretty darn good at microamps.
A classic! I used to collect bench and portable meters for years and I had something similar looking to the Simpson but it was some quality antique USA name brand and it was gorgeous to view. I really appreciated using that for monitoring the voltage at my workbench.
That ought to be in a industrial art museum. It was like your Simpson, as large too, the movement was wonderful to watch it had really nice damping on the movement.
That is another classic but the one I had was older than that style. LoL...
The mirror was huge too.I was going to suggest a power factor meter, got ninja'd...
Is that a thing anymore?Well, as I said elsewhere today (on roughly the same topic), NIST-traceable calibration would be nice...
Yeah, we had 'em, too.Is that a thing anymore?
We had 'metrology' departments, which had to confiscate all TE that were passed their 6month calibration cycles.
My browser spell-check just flagged that word above!
My Simpson was -- if you can imagine
-- a dump find.
Sigh* I wanna marry her! She's beautifullllll. LoL... Love that meter...My Simpson was -- if you can imagine
FWIW, I don't think time resolution is as important as accuracy (and repeatability). I think the most interesting thing to do (still) would be to
look at long-term power consumption of the amp compared to another amp just using it to play music.
I like how you speak. Have you seen the B&K Precision line of AC power supplies with metering for Vrms, Irms, Ipeak, PF, apparent power, true power for US $2550 and I think Amirm already has one or similar? Is this good enough in your opinion for ASR? I mean to add as well that I don't see too many other e-media or media outlets doing this sort of full input-to-output (i2O) metering stuff. It really adds a varied aspect that addresses the operation including the power, efficiency (If somebody can make software so it's easy to calculate with variables filled in fields?) and to have Irms, Vrms then we can calculate power(s)(Watts). It would not be a big deal for the additional metrology operations to be added to that which Amirm already performs while testing gear although I think there may require instrumentation changes/additions for various metering operations. It's not a big deal to connect 4 & 8 Ohms loads while monitoring them via a oscilloscope and shooting for 0.1W, 0.5W, 1W, 10W. The peak voltage required for the RMS wattage figures that I stated can be calculated in a minute or so using a online calculator and so it's easy peasy basic roots level i2O metering.
