Electronics > Metrology

USA Cal Club Round 3

<< < (14/23) > >>

Further reporting (now on to the PX).

But before that, I probably need to clarify that my 8502A has had this Z540-1 I've been talking about done roughly a month and a half ago, so its cal is as fresh as they come.

At 22.5C (starting from dead cold) my meter says 7.04574V. About 2.5hrs later, my meter thinks 7.04572V. So the PX is just as solid as a thick brick wall. This is with an HP 3610A dialed in very close to 15V.

The Vout value on the unit is listed at 7.0456V.

What does the 8502A read if you manually select the 10V range, put a short on the input and let it sit for an hour?


--- Quote from: bdunham7 on March 25, 2023, 12:52:51 am ---What does the 8502A read if you manually select the 10V range, put a short on the input and let it sit for an hour?

--- End quote ---

Without performing the zeroing procedure, in all scales I'm seeing a perfect zero across the board, except for some occasional 1s in the last digit on the 1V scale, I think.

At Randall's recommendation, I've been keeping track of both the DP8200 and the FX at different temperature points. As expected, the 8200 exhibits more delta, but frankly, less so than I expected. Will plot this out later.

I'd welcome some other ideas as to what I could use the time with the standards for. I'm not really able to automate logging data (my GPIB success seems to be somewhere in my future), so all of this is very analog (paper and pen). But overall it seems both my calibrated meter and the standards are extremely stable (well, duh...) and so I feel I'm a bit running out of things to log, measure, submit.

I am eager to be a useful contributor so please assist with suggestions. I got about a week allocation left, so I'm hopeful to make the best of it. .

Re GPIB, I have found the National Instruments GPIB-232CT-A Serial to GPIB box to be a very easy device to get along with for logging data and/or controlling instruments.

What I like about it:

* Often found on eBay for a good price.
* Old school build quality is excellent - steel box with solid connectors that can definitely take a beating.
* Compact, easy to hide away.
* Easy to connect to a serial port, or you can use a USB to Serial adapter if your PC doesn't have one.
* No drivers needed. Just plug it in, and you're good to go.
* The high-level commands are simple, you can write VBA commands in Excel for data logging or use a terminal program, the box manages the GPIB .
* Compatibility is top-notch. I've used it with a bunch of vintage HP and Fluke gear without any hiccups.
* Comes with old school documentation of all functions, features, and commands.

The only thing that could be seen as a downside is the speed of the serial connection, but I haven't had any issues with it. The simplicity and the freedom from dealing with bulky drivers or specialized software has made this device a game-changer for me. Well worth a look if you want something that "just works" without having to attain a degree in computer science to get it up and running!


[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod