The Trades OS
Free — one page, print it
Most techs are reading voltage. Few know what they're looking at.
There's a reading that kills motors slowly — and the meter looks fine when it's happening. This sheet covers that one and four others veterans check on every call. Free. One page.
What it covers
- 5 critical readings — what good looks like, and exactly what it's telling you when it's off
- The one check most techs skip — it doesn't show up on the meter as a problem, but it's running the motor into the ground
- A 3-step field calculation — takes 60 seconds, tells you whether the supply is the problem before you touch anything else
- A voltage mismatch warning — two numbers techs treat as interchangeable that aren't, and what it costs when you get it wrong
RTUs + motors/pumps. Built for the field, not the classroom.
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"Finally — a reference that shows you what the reading means, not just what it should be. The unbalance section alone is worth it."
— Journeyman tech, commercial HVAC