Products > Test Equipment
A look at the Uni-T UT210E
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elman:
Hello, on my clamp meter UT210E I wanted to change the starting mode from AC to DC but when I read the DM24C02 EEPROM memory in all positions it is 00. What does this mean, have you encountered this situation before? It is normal? I do not understand!
Shonky:
That would suggest to me that you haven't read it correctly.
Gyro:
If you look earlier in the thread, you will find that there are specific conditions for reading the eeprom - DMM chip powered but held in reset irrc, but I can't remember the exact details.
elman:
I took out the memory chip and read it correctly. Thanks for the tips.
I also have a measurement error, I tested on the 2A DC and 20A DC scale, the error is the same: with the ammeter it indicates 1.17A and with the clamp meter it indicates 1.146 on the 2A scale and on the 20A scale it shows 1.14A. Should I increase the value of the amplifier or range calibration adjustment ratio to 2A and 20A (6A and 60A)?.
Thank you.
Brian of Romsey:
As SHONKY says, if it is all zeros then you aren't looking at the actual contents.  So either the read didn't succeed or you aren't looking at it.  You can test this by setting the buffer to 0xDEADBEEF over and over, then read the device again.  If you see a load of zeros then I would suggest that what you are looking at is NOT the relevant part of the device/buffer.  And obviously if you still see the DEADBEEF then the read is not happening in the way you think it is.
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