On 02 Aug 2003 13:12:45 GMT, (WbSearch) wrote:

Have a Micronta M/N 22-191 multimeter that recently won't display zero only on
DC at the 2 volt selection or higher. The 200 mv scale is fine, as are all
scales of AC volts. The display shows between 0.100 - 0.500 volts, even when
the plus and minus leads are touched together. I have cleaned the PCB and
switches which helped for a short time. All diodes, resistors, batteries and
fuses check fine. All other functions work porperly as well. Any other help
is appreciated.
Also, does anyone know what the 2 POT's are for? The manual doesn't go into
that detail. Thanks in advance.

You may have checked this already but..............if it has a
rotary switch built into a circuit board then check to make sure
that no conductive smears have formed between the different
contacts of the switch.