Products > Test Equipment
Black Star 4503 GPIB DMM Firmware Question
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edpalmer42:

--- Quote from: Isad on June 03, 2015, 03:01:46 pm ---They could be just coding for the company.
So that only the company know.Or sombody in the company did the smart ass
so no one els could know what that means.Do you have any source of 50hz.
Dont really know but if it works like that i dont know why you would want to change that.

--- End quote ---

Now that I've got the calibration error fixed I'll start checking out the operation.  Since the AC measurements are performed by a True RMS to DC converter I don't see that 50 Hz vs. 60 Hz would have any effect on that.  I'll see if there's any effect on a DC measurement made in the presence of 50 Hz or 60 Hz AC.  I see that common mode and normal mode rejection ratios are specified at 50 Hz.  I'll have to see if I can measure those and see what happens at 60 Hz.

When I get a new piece of equipment I always find new things to learn about.   :)

Ed
Isad:

Now that I've got the calibration error fixed I'll start checking out the operation.  Since the AC measurements are performed by a True RMS to DC converter I don't see that 50 Hz vs. 60 Hz would have any effect on that.  I'll see if there's any effect on a DC measurement made in the presence of 50 Hz or 60 Hz AC.  I see that common mode and normal mode rejection ratios are specified at 50 Hz.  I'll have to see if I can measure those and see what happens at 60 Hz.

When I get a new piece of equipment I always find new things to learn about.   :)

Ed
[/quote]

Keep me updated about that would like to see if that eprom really has to do somthing with the rejection ratios.
Would love to get some sort of dmm but dam there is nothing cheap here.

Littlejo44:
Hi there..
I know it's been a long time since you made reference to a Black Star 4503 manual, but do you still have access please?
John.. Bristol.. UK
edpalmer42:
http://w.ko4bb.com/getsimple/index.php?id=manuals&dir=06_Misc_Test_Equipment/BlackStar

Includes both the Operator's Manual and Service Manual.
AVGresponding:

--- Quote from: edpalmer42 on July 24, 2020, 01:33:59 am ---http://w.ko4bb.com/getsimple/index.php?id=manuals&dir=06_Misc_Test_Equipment/BlackStar

Includes both the Operator's Manual and Service Manual.

--- End quote ---

There numerous differences between the issued manuals and the manufactured meters; many discrepancies between part numbers and component values.

The manuals are useful, but double check what you're looking at, always.
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