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how to calibrate Victor Vc97
sahamipoor:
hi gays...
i have huge problem by vc97...
after By mistake, I tried to test a high frequency for measurement. More importantly, Multimeter played a certain sound like start music and then the calibration got messed up!!!
In the voltage range has a permanent negative offset digit , in frequency range and the capacitor are messed up.The numbers are not as accurate as before.
All parts and transistors were checked and are OK.
i did flash the IC EPRROM with the file copied from the same like device ok, but also it did not work.
There are two point on the back of the board that go into calibration mode by connecting these two ,and calibrate process started... but I don't know Exactly how to do it.
chip is DS-HY12P66 (DTM0660)
eeprom 24c02
Dear engineers, I am asking for help. to this problem.
Thank you very much
Fungus:
You killed it.
Watch this video:
https://youtu.be/4rADgFqFFH8?t=775
--- Quote from: sahamipoor on January 10, 2023, 12:41:58 pm ---Multimeter played a certain music and then the calibration got messed up!!!
--- End quote ---
Did you record the music? :-DMM
sahamipoor:
:-\
music!!No, how can I do this at that moment!!!but the music like starting over devices..like that
There was no damage to the hardware
But I saw the movie, but it did not specifically mention this issue
Fungus:
--- Quote from: sahamipoor on January 11, 2023, 01:04:19 pm ---But I saw the movie, but it did not specifically mention this issue
--- End quote ---
No, but it shows that measuring high frequencies can be very bad for multimeters.
ledtester:
--- Quote from: Fungus on January 11, 2023, 02:23:12 pm ---No, but it shows that measuring high frequencies can be very bad for multimeters.
--- End quote ---
Another joe smith test -- trying to power up an Aneng 8008 with a 200 MHz signal applied:
ANENG AN8008 Handheld Multi-meter
https://youtu.be/TSGLA9heboY&t=715s
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