Right on the money --instrumentation, part 1

摘要

When asked how he proved to the prospective buyer a unit was getting up to advertised temperature, an old-time salesman will no doubt respond, "You simply dipped your fingers in the float tank and dribbled a bit of water on the outlet fittings. The buyer would then be able to appreciate the rate of evaporation. If the water bubbled as it evaporated, you were right on the money. It had to be doing at least 212°F." When asked how he proved that the pressure was up to specs, his answer would be, "Well, you just know it when you're hitting 1500 psi. It just feels right." Try that on a modern day service call, and you will no doubt be shown the way to the gate suspended by your shirt collar!