S
I’ve searched standards, the net etc to no avail. Has there ever been guidance, a convention or a standard to distinguish vacuum levels on an analogue vacuum gauge? For example black markings/needle on a yellow background for High Vacuum, yellow markings/needle on a black background for Low Vacuum etc. Or if not for medical devices, then for gauges used in any other applications.
Bit of a long shot.
Steve
Bit of a long shot.
Steve