"Ken_B" @ wrote in message ...
| I've acquired a couple of probes marked "PR 200" & "PhilipsECG" on one
side
| of small box integrated with connector, 1/1-1/10 with adjustment hole on
| other side (calibration?). Three-position switch on probe marked 1 - 10 -
G.
| I assume this is 1x/10x multiplier/ground selector.
|
| Google search no help. Can someone give me any info on these? Thanks.

Resistance tip to ground on each setting?

N