[Argus25]

....... I could have added this remark, perhaps after a glass of Chardonnay to disinhibit the frontal lobes. Not to offend anybody, not the intention, but this is how I feel about it:

I expect that any test or measurement/apparatus should read out its final display in scientific units. For example an oil pressure gauge in pounds per square inch or Newtons per square meter, or an volt meter in Joules per Coulomb(volts) or an amp meter in Coulombs per second (Amps). Car manufacturers once decided that the punters wouldn't understand or care about monitoring the specifics, so they cooked up the notion of "idiot lights" or "good vs bad" indicators and trashed the real instruments.

I just can't put up with that and I don't regard any test equipment with a pass -fail output on it as being a "scientific instrument". Please don't be offended, it is just my opinion. So when I see the Green-Red good bad meters on valve testers, I just look the other way.