Smiths and Jaeger Instrument connections
Discussion
Some gauges don't care which way round they are connected. Others, if you get it wrong, will simply not give a sensible reading. Sometimes there is no marking and there is some color below the connector stud in the fiber insulating washer, red for +ve black for -ve. Can't give any specific advice without actually seeing the gauge. Always check if one is connected to the case -if it is then that is ground (earth) and should be connected accordingly.
Hope this helps
Moreflaps
Hope this helps
Moreflaps
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