When I was doing warranty claim inspections I used a Snap-On click type wrench that had to be calibrated once a year. It never failed to pass the annual check, with little if any adjustment required. The big thing to remember is to release the spring tension on the adjustment immediately after the wrench is used. Leaving the wrench adjusted to a specific torque can result in the spring taking a set and getting inaccurate at other settings.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!