"Bert" lijbertv_at_xsinet_dot_co_dot_za wrote in message
...
Hello all
I have a few digital multimeters which are in need of calibrating, cheap
meters.
How do I make a DC calibrating voltage source with say 1% accuracy, any
voltage, prefer close to 1999 reading.

If they are cheap, are you sure they can easily be calibrated?

Can you borrow a calibrated meter?

A fresh silver oxide cell is going to be very close to 1.55 volts and can be
used as an initial check.