Fuzion RT500 professional digital mini scale user manual

SOURCE: need manual to reset scale to weigh properly

Either do a search for that particular scale brand & model, which should take you to the company, whom should have a manual on-line or go back under search and type in "users manuals". There should be several manual websites that come up. Just don't click on the websites that require money for their manuals, when you can get them for free at other sites.

SOURCE: mini digital scale displays out2

I just had this problem on set Salter scales (says 3309 on label on back so assume that's model no) which came up OUT2 solidly after hadn't been used for a while.
Looking on WWW this means on other scales they need to be recalibrated. There are only 2 buttons on ths model ON/Zero and 2nd is mode for grams, oz etc. Discovered by trial and error have to hold down the on button and repeatedly click the measure button as it powers up, screen says err2 press on button again and says 5000g, put 5000g weight on scales, press on button again display says CAL press on button and it at first came up with EEEE and failed but next attempt it said PASS and it all worked again. I used 2 x 1.5kg bags flour and 2 x 1Kg bags sugar to make 5kg with bit tipped out of one to make exact and checked on another set scales. So trick appears to be finding how to get your scales in to calibrate mode and what the weight it expects is.