Manual Weighing Controller A 810
Page
96
A.S.T. Angewandte SYSTEM-TECHNIK GmbH Dresden
6.2. Theoretical calibration
Theoretical calibration is used for calibration without balance weight. It is possible to enter a known input
ratio of an load cell to A810. This procedure is not as accurate as calibration with balance weight because
tolerances of components influence the result.
When operator knows the input ratio of a load cell and wants to replace the weighing controller, he should
have marked out these values before. These values could be for example:
0.00239mV/V at Zero point and
(from 3.1.17.4 at page 66)
2.15267mV/V at nominal load.
(from 3.1.17.5 at page 66)
After replacing the weighing controller, these two input ratios are entered to A810. At first the known input
ratio at Zero point of load cell is entered at point 3.1.4.3. After that the known input ratio at Fullscale of
load cell is entered. A810 is now calibrated at these two points.
When you do only a theoretical calibration at Zero point, weighing function is moved parallel to previous
weighing function.
When you are using A810 and load-cell out of the box and you want to do theoretical calibration, the
procedure is as follows:
enter “0.00000” at Zero point (3.1.4.3 at page 35)
enter mV/V-ratio delivered with your load-cell at nominal load
return to weighing mode and A810 shows value different from zero
enter setup mode again
do zero with unloaded cell (submenu “Calibration” 3.1.5.1.1 at page 34)
return back to weighing mode and A810 shows zero.
