¿ªÔÆÌåÓý

  1. HP-Agilent-Keysight-Equipment
  2. Messages
Single Messages Topics Expanded

Re: HP3457A 7.5 Digits..

 

On Tue, 17 Dec 2024 at 21:28, VE6WMR via <akuzych=[email protected]> wrote:
I'm considering purchase of an HP3457A for use in metrology, primarily for setting DC voltage with 7.5 digits of precision.

It's not a metrology unit.?
?
It seems that I can purchase an HP3457A for a few hundred dollars, calibrated. I've reviewed the datasheet, and the operating manual, I can't see how it extracts the last extended digit in what appears to be a 6.5 digit meter in all stated specifications.
?
I realize that the counting speed is very low at that high resolution, and there may be better quality or faster choices. I'm on a budget for this one, I have bought discounted Solartron meters in the past and am quite happy with that value as well.
?
Bottom of the test equipment market here, could a HP3457A be made to display 7.5 digits in DC volts as-is?
?
I believe one can only get the last digit via the GPIB bus.? As far as I am aware, it is basically noise, and not actually worth having. I think you need to accept it's a very decent 6.5 digit meter. I have one, which I bought used about 30 years ago. I sent it to Keysight for cal about 5 years ago, and it was still in spec.?

I have seen Kiethley 2001's at quite reasonable prices. If you want 7.5 digits, that's probably a better bet.

Join [email protected] to automatically receive all group messages.