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Free HP3478A multimeter control program.

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Miti:

--- Quote from: lmester on November 28, 2019, 03:48:42 am ---Also, I like the way you show the cal gain and offset. If you don't mind, i'd like to use some of your code to add that feature to mine.

--- End quote ---

Hi lmester,

If you do that, can you also add edit function to the program? This way one can adjust the offset or gain of a particular function in decimal, the program then calculates the hex and checksum and saves to a new calibration file.

steve1515:
Hi lmester,

There is maybe a 200 mSec delay when starting up, but once you connect to the COM port at the correct baud rate it should work.

Feel free to use the code, but please add attribution. Thanks! :)

lmester:
Miti,

That's a great idea! It'd be really great to be able to tweak up the gain and/or offset without going through a full calibration.  With it's input shorted my meter shows a small negative reading on some resistance ranges. It could use some offset adjustment. And, now that we can easily save the cal data, you could revert back to an earlier cal if you mess things up by tweaking the cal entries.

Miti:

--- Quote from: lmester on November 29, 2019, 04:52:06 am ---With it's input shorted my meter shows a small negative reading on some resistance ranges. It could use some offset adjustment.

--- End quote ---

Does it show that negative reading in both, 2W and 4W? Keep in mind that this meter can only be calibrated in one mode, which seems stupid to me.

lmester:
!!! update !!!  12/7/2019

Unfortunately I've found some more problems with my program and  the new AR488 firmware.

Use the 0.46.03  AR488 firmware until I solve all of the problems.

Sorry about this :-(

--------- old post ------

A problem with my software and the AR488 arduino firmware has been solved.

If you're having problems connecting to your meter using the AR488 firmware you can correct the problem by downloading the 0.47.59 version: https://github.com/Twilight-Logic/AR488



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