I have a hand-me-down multimeter from my Mom made in the 80s. I don't have another meter that is good enough to be used as a calibration standard, however I do have a few reference chips and precision resistors. I hope I can calibrate that multimeter using those.
My 3.5-digit multimeter is a Zhenxing DT-890 made in the 80s. I have a few of each reference chips,
ADR03B. I have an And I have a few 0.1% tolerance resistors. Are those reference chips good enough? To calibrate lower voltage ranges, is
TLC5615 a good enough chip to use to divide the reference voltage down?
I am on a tight budget so this meter have to be kept in spec for a while, before I can save up for a used Keysight 34401A.