Author Topic: Help. Agilent U1252B eeprom dump  (Read 525 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
 

Offline janiorib

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Re: Help. Agilent U1252B eeprom dump
« Reply #5 on: September 18, 2024, 12:59:14 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..


Here is the copy of the EEPROM U1252B, do not notice the condition of the casing as it is practically rotten with age. :-\ More like and use he even has a UT181 next door.  :-DMM
 


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