Priva Compass Installation Manual page 116

Priva
Load Cells
In this menu, you can enter the load cell data necessary for the weighing indicator to function
properly. The load cell is the sensor inside the weighing platform which measures the weight.
Information such as sensitivity and zero of the separate load cells, the number of load cells and the
weight range of a load cell is involved.
Sensitivity 1 - 4
In this menu item is set the sensitivity for each of the separate load cells. The sensitivity is derived
from the difference voltage given out by the load cell between zero load and maximum load. The
sensitivity of the separate load cells needs to be equal in order to prevent deviations in the weighing
unit.
Zero 1 - 4
In this menu item is entered the voltage given out at zero load by each of the separate load cells.
This is called the zero. The zero load is measured when the weighing platform is empty.
# of Load Cells
In this menu item is entered the number of load cells (weighing platforms) of which the weighing
unit consists. This should be either two (2) or four (4), the default is set at two (2).
#kg/Load Cell
Here, the weight range of each of a separate load cell is entered in kilograms, the default is set to
50 kg. This figure represents the maximum weight which can safely be placed on the platform without
damaging the load cell. The weight range must be the same for all weighing platforms in the unit.
Set tare Weight
This menu item can be used to record the new zero weight. The figure shown on the display is the
actual nett weight. By activating this function, the current weight of the whole weighing unit is set
to 0 kg. This menu item is also part of the menu Slab calibration. After performing the Set tare Weight
function, the new difference in weight between the new zero point and the absolute zero point of
the weighing indicator will be calculated in the item Tare Weight of the Measurements menu.
Adj. Adjust Sens.
This menu item allows you to make corrections in order to rectify small deviations introduced as a
result of installing the weighing unit.
Effect of using the function Ajust Sens.
This can be done by a procentual adjustment of the total sensitivity of the load cells as entered in
the menu items Sensitivity 1 - 4. To do this, check the weighing unit by using large calibration weights
(2x20 kg). Before these are placed on the weighing unit, the unit itself should be tared. Then each
of the calibration weights can be placed at the height of a weighing platform. The actual nett weight
is then adjusted to the absolute calibration weight. It is not necessary to perform this function to
achieve a good performance by the weighing unit.
114 Installing Priva Compass - 00.014