Got an overnighted replacement bar? Take two minutes to confirm it works before you install it — and run the same test on your old bar to be sure it was really the problem. No meter needed.
The quick pressure test
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Connect the bar to your indicator (on the bench with just that bar plugged in, or in place before you tighten everything down).
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Power on and zero the indicator with no load.
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Apply load to the bar — press down firmly, stand on it, or set/hang a known weight. Load the top (the side marked TOP / (T)).
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Watch the display: a good bar makes the reading climb as you load it.
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Release the load — it should return to zero (within a few pounds) and hold steady, no drift.
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Tap test: gently tap around the bar with a rubber mallet or the wooden handle of a hammer. A good bar stays stable; a bad one jumps.
Good bar vs. bad bar
Good: climbs with load, reads positive, returns to zero and holds, steady when tapped. Bad: drifts on its own, won’t return to zero, jumps when tapped, reads negative under load, no response, or shows +Range / −Range.
Now test the old bar the same way
If the old bar fails and the new bar passes, you’ve found and fixed it — install it. If both behave the same, the trouble is probably not the bar — look at the cable, junction box, or indicator next, and call us before you swap anything.
Handle the bar right
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Load the top (TOP / (T) up) — loading it upside down can read negative.
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Rubber mallet or wooden handle only for the tap test — never strike the sensor can or where the cable exits with a metal hammer head.
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Don’t exceed the bar’s rated capacity, and never lift or pull the bar by its cable.
Want to be 100% sure? A volt/ohm meter reads the exact resistance values (see the weigh-bar meter test), or call Central City Scale at 800-582-3175.
