Electronics > Repair
Fluke 199C scopemeter repair
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feedback.loop:

--- Quote from: asis on October 02, 2021, 07:05:21 am ---Static SRAM (CY62147CV33) located on the module A201 together with FlashRAM (ST39VF800A) is used to save TrendPlot Waveform and Setup data in Recorder mode.
Therefore, even if the scope is turned off, the module is still powered and consumes current until the battery is completely discharged.

--- End quote ---

SRAM chips consume about 8-9 uA in standby, and Flash chips consume about 4 uA. I don't see any reason to worry about it.
feedback.loop:
A dedicated programmer for Fluke 19x memory modules was developed including software in C for an Atmel microcontroller and a piece of software in Python to control the programmer from a PC.

Xenawise:
I must congratulate you on this project. Surely many, many hours of work has gone into this and I for one have to say I am appreciative of all this hard work.

Any plans on making this public and/or open source? I for one think I would like to build one of these as I too have a few of these 199C scopes in my lab.

If you do decide to make it public or even decide to sell it or ask for donations, I just want you to know I would be interested.

Again, thanks for the all the hard work you have done to bring this to life.

Regards,

Xenawise
feedback.loop:

--- Quote from: Xenawise on October 04, 2021, 07:41:47 pm ---I must congratulate you on this project. Surely many, many hours of work has gone into this and I for one have to say I am appreciative of all this hard work.

Any plans on making this public and/or open source? I for one think I would like to build one of these as I too have a few of these 199C scopes in my lab.

If you do decide to make it public or even decide to sell it or ask for donations, I just want you to know I would be interested.

Again, thanks for the all the hard work you have done to bring this to life.

Regards,

Xenawise

--- End quote ---

Is there anything wrong with your units? What would you like to do with them? Keep in mind that upgrading like this will need recalibration. I built a module for a scope with a missing module, so it needs recalibration anyway. Also I don't know (yet) how to modify the serial number in the Flash so that it would match the one marked on the back cover. I would love to know how to do this.

As to making it public, perhaps I could. Perhaps, I also could build the remaining 4 boards if someone is interested. (I wonder what would be a reasonable fee for this).
Per Hansson:
It would be interesting to be able to make a backup for sure of a working unit, flash chips do fail as you know.
At least when you have a backup you are assured your unit will never fail in a way requiring the backup :D
Thank you very much for making this video series, it has been very interesting!
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