Get the LCR meter.
If you want truly accurate resistance measurements, look to 5.5 digit or better bench meters
Isn't that what the HP3478A is? a 5.5 digit bench meter...
But what I need is something to accurately measure things like 1.228 V AC Sine Waves at 1K, 10K, 15K
Measure what exactly? Harmonic distortion, peak to peak, rms ?
Your best bet is an oscilloscope so you can see the waveform.
Someone else pointed out to me that most handhled DMM do not measure AC above 1KHz
Sorry that wasn't that clear. I need to measure that I have 1.228 V AC RMS at a test point at 1KHz, then the same (or a different specific voltage) at a test point at 10KHz for example. whilst adjusting trimmers.
We've got a Rigol DS1054Z, but it's only 8-12 Bits, so the voltage measurements are fairly inaccurate I believe.
Audio Interfaces (eg soundcards) can be a great tool these days, no doubt. Great if you want to do a frequency / phase sweep or whatever. Not really appropriate for what I need out of this meter though.
The Keithley sounds interesting, if I can find one for not too much $. We already have an HP 334 distortion meter.
The The Brymen BM869S (or Greenlee DM-860A) Looks like a cracker... any recommendations on where to buy one?
There's still somthing (Benchy &) interesting about that HP 3478. The BM869S is probably the sensible choice.