| Products > Test Equipment |
| Uni-T launches the UT117C multimeter |
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| makz:
--- Quote from: geb on September 14, 2023, 04:28:31 pm ---Hmm, how do you know it was used? Reworking a board is normal, especially in early production. Was there other evidence besides the EEPROM? --- Quote ---I think I've found a calibration constant for DCV. --- End quote --- Excellent! Does the change affect all DCV ranges, or just one? And if it affects all DCV ranges, do you notice any change in resistance ranges? --- End quote --- DCV all ranges more accurate now. I will compare with pm2525. Resistance range without any changes, im not sure |
| makz:
old eeprom and new eeprom |
| geb:
It's been a busy time, but I revisited UT117C briefly. EEPROM offsets 01 and 02 are an overall DCV calibration value. 01 is the MSB, 02 is the LSB. I discovered that my unit's DCV range isn't zeroed perfectly. So, as I calibrated DCV by manually updating the value in offset 02 of EEPROM, I checked both +5V and -5V. I updated offset 02 to a level where +5V is shown as three counts too high, and -5V is two counts too low. Linearity is okay but not perfect when I check 1VDC, 2V, ... up to 6V. The 5V is a bit off and the 6V is off by quite a bit more. |
| ru_tash:
Hi, nobody mention capacitors measurements, sad surprise for me - the resolution 1nF, so to measure 10000pF will display 9nF ((. Other than that all ok. |
| BILLPOD:
Mine reads 0.01uF......go figure. |
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