Products > Test Equipment
HP 34401A 3457A 3456A 3478A Standalone Software
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RaymondMack:

--- Quote from: Nx-1997 on June 27, 2021, 05:45:53 pm ---Thanks for testing the software. Currently I am only creating software for the instruments I have, and I do not have a Fluke 8845/8846, sorry. However, source code is available, anyone with experience can use the code to create a software for other meters. The graph modules are completely independent, and can be ported to any software that needs a graph.

For AR488 version, the following commands are used.
++addr
++eor, only for 34401a
++auto
++ren, only for 3457A, 34401a
++read
++read_tmo_ms
++rst, only used if clicked on AR488 reset button.
++ver, only if clicked on AR488 version button.

All other settings for AR488 remain set to default. The above settings also change to default when sending ++rst command or unplugging the AR488 adapter from the USB port.
--- End quote ---

The software looks amazing Nx-1997! Thanks for sharing!

Since SCPI commands are so generic, the Fluke 8845/8846 and relabeled Tektronix DMM4050/4040 multimeters may already work with the HP34401A version of the SW.

I should be able to test this later on tonight.
RaymondMack:
Looks like the serial version of "HP 34401A" checks to see if an actual 34401A instrument is connected. So I'll need to compile a new version. Shouldn't be very hard to do.

I don't forsee there being any further issues with getting the SW to work with other SCPI compliant DMMs aside from unusual NPLC and >3A current settings.
Nx-1997:
Hi, RaymondMack

I compiled a special version of the software (RS232) to see if it would support Fluke 8845A/8846A. I have removed the string validation check as well as tweaked a few things, nothing significant. See if this build works for you. 34401A's SCPI commands may be slightly different from 8845/8856 SCPI commands.
RaymondMack:
Hi Nx-1997,

It's funny that you just made that! I had already removed the 34401A check/verification and tested it to work with my Tektronix DMM4050. I was just about to upload my build before I saw your new comment! I'll give your new build a test here in a bit.

SCPI commands are pretty generic and have good cross compatibility with many instruments. The only time one might run into an issue is with DMMs that have features not available to the 34401A or vice versa (say no diode check etc.)
RaymondMack:
Just tried the new build from Nx-1997 and... it works!

For those interested in testing the new build, it should work for any SCPI compliant DMM who’s features overlap with the HP 34401A.

If you encounter an error at the meter, just go to the Queries tab and send CLS to clear the error and everything should work again. I didn't need to do this while testing, but problems might crop up for meters that only have a subset of the 34401A's features.

Obviously, a meter with features that are a superset of the 34401A will not available unless "auto range" or similar can be used to set them indirectly (e.g., the 10A range on a Tek DMM4050).
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