What would make ??

[backstrap]

What would make my new ohaus beam scales off of zero every time i return it to zero its of??  say put it on like 40 grains move it back to zero and its off some EVERY time could it be that my bench in not perfectly level this has me very puzzled thanks for the info

[LaOtto222]

I am not familiar with your scale. I have a RCBS beam scale and I put the weights on zero and then level the scale (put the indicator at zero). Be sure the weights are on exactly zero and setting in their grooves the same each time. There is a leg at the end of the scale that adjusts it up or down. If you are doing this and it does not return to zero, look for any thing that might be in the "knives" that it balances on. This is the pivot point, this area must be free of any foreign material even dust. There not be even the slightest bit of air movement. Like when the furnace kicks in, they are very sensitive to air movement even very little. Do not move the scale at all; once you have it leveled and zeroed. If you bump the scale, it could affect zero.



The bench you set it on must be stable and some what level. I built this scale stand to raise the scale up at a better level to work with. It is heavy and three legged so it is very stable and I can level it by adjusting the legs. I have room to set my powder trickler on too. It does not move

[Dave in WV]

The adjustable base screw is for correcting an out of level condition so the surface does not need to be perfectly level. If you move the scales form where it was placed when adjusted (it does not take much) the zero will be different. Take a Q-tip and clean the pivot points. The pivot points need to be clean but NOT lubed.

[beemanbeme]

I have a 10-10 and every time I take it off the shelf and put it on the bench I have to re-level it. Is that what you mean?  I've never thought much about it.  I just assumed the wooden table top just flexed with changes in atmosphere and temp. 

[backstrap]

No i dont move it once it is zeroed it just dont stay zeroed, if a weight a few loads of powder and move it back to zero its off every time. they are the company that started make rcbs 505 beam scales they are new but very old and just off zero every time, start makeing me mad, i know to make sure ever thing is in its notch ,other words i know how to zero the scales.well if it is off u know that the measured powder would be of a few tenths or more so i would think just thought i would ask u guys thanks for the info

[OR-E-Gun Bill]

Static electricity has been known to cause havoc in electronic & balance beam scales. Any chance of that happening?

Here's a warning the Lyman Website has for their scales:




Bill

[Chuck White]

Just moving things around on your bench after the scale is zero'd or someone just
walking across the floor could cause enough vibration to affect calibration of the scale!

Of course, if you're set up on a concrete floor that will not affect zero much, if any!