Author Topic: Help. Agilent U1252B eeprom dump  (Read 323 times)

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Offline hlj.pycadTopic starter

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Help. Agilent U1252B eeprom dump
« on: May 24, 2024, 01:28:30 pm »
I've messed up with my U1252B completely when I try to fix the resistor read a dozen of Mega when probe was opened. And I want to try copy the calibration data from another U1252, but I don't know which IC is, any hints about that ?


Is it this one? s93c86, it's an eeprom, the cap block the clutch readout without soldering, so i want to confirm before any soldering.

It's  a s93c86 8KB eeprom, and can read out without anything breaking by a clutch and CH341 programmer, if you've never dumped it, you should before do any calibration...

U1252B and U1253B will do, it's almost the same version but U1253B has a nice OLED screen.
« Last Edit: May 24, 2024, 06:38:37 pm by hlj.pycad »
I am from China, so of course I speak chinglish
 

Offline hlj.pycadTopic starter

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Re: where & which is Agilent U1250 series calibration eeprom ic?
« Reply #1 on: May 24, 2024, 04:03:42 pm »
I grided out the clutch a bit, then I can set it up, does this eeprom dump contains calibration data?
I am from China, so of course I speak chinglish
 

Offline hlj.pycadTopic starter

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Re: where & which is Agilent U1250 series calibration eeprom ic?
« Reply #2 on: May 24, 2024, 04:26:58 pm »
Now I am pretty sure that eeprom ic store the calibration data, I dump it then do another calibration for the Voltage of "short" and "3V", the calibration count was 56, which is "0x38", and there is a 0x38, it became 0x39 (57) after another calibration,  and some bits changed as well, I reckon those are calibration data. ;D

Because the other u1252 is U1252A instead of U1252B, it would be very nice if anyone can dump me a U1252B eeprom data...
« Last Edit: May 24, 2024, 05:02:52 pm by hlj.pycad »
I am from China, so of course I speak chinglish
 

Offline gamalot

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Re: Help. Agilent U1252B or U1253B eeprom dump
« Reply #3 on: May 24, 2024, 05:53:42 pm »
This is from my U1235B, good luck.  :-+
 
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Offline hlj.pycadTopic starter

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Re: Help. Agilent U1252B eeprom dump
« Reply #4 on: May 24, 2024, 06:41:14 pm »
thank you. Unfortunately, the 1253B is different arrange from 1252B... And I tried my U1252A as well, can't use directly... upload it any way in case anyone want it someday..
I am from China, so of course I speak chinglish
 


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