A load carrier with a receiving pan for a free-flowing substance, a calibration weight holder for supporting a calibration weight, and a connector element for connecting the load carrier to a load receiver of a weighing cell. The receiving pan is arranged between the connector element and the calibration weight holder and is designed to be loaded with the free-flowing substance through a passage in the calibration weight holder. The calibration weight holder can be loaded with a calibration weight independently of the load status of the receiving pan.
1. A load carrier for a weighing cell, comprising:
a connector element for connecting the load carrier to a weighing cell;
a calibration weight holder for supporting a calibration weight, the calibration weight holder having a passage therethrough; and
a receiving pan designed for loading with a free-flowing substance through the passage in the calibration weight holder, said receiving pan arranged between the calibration weight holder and the connector element;
wherein the calibration weight holder can be loaded with a calibration weight regardless of the load status of the receiving pan.
2. A load carrier according to claim 1 , wherein the receiving pan includes at least one seat for the calibration weight holder.
3. A load carrier according to claim 2 , wherein the seat is formed by a circumferential rim profile of the receiving pan.
4. A load carrier according to claim 2 , wherein the seat is formed by at least one recess in the rim at the top of the receiving pan.
5. A load carrier according to claim 1 , wherein the calibration weight holder includes at least three supports.
6. A load carrier according to claim 1 , wherein the calibration weight holder is configured substantially as a ring and is releasably connected to the receiving pan.
7. A load carrier according to claim 1 , wherein the calibration weight holder and the receiving pan are rigidly connected to each other or formed integrally of one piece.
8. A load carrier according to claim 1 , wherein the calibration weight holder includes at least one centering element.
9. A load carrier according to claim 1 , wherein the calibration weight and the calibration weight holder each include at least one means of engagement, the respective means of engagement cooperating with each other.
10. A load carrier according to claim 1 , wherein the interior of the receiving pan and the calibration weight holder have rounded interior surfaces.
11. A load carrier according to claim 1 , wherein the calibration weight holder can be loaded manually.
12. A load carrier according to claim 1 , wherein the calibration weight holder can be loaded automatically.
13. A method of calibrating a weighing cell and weighing a free-flowing substance, comprising:
(a) connecting a load carrier to a load receiver of the weighing cell, the load carrier including a receiving pan designed for loading with a free-flowing substance and a calibration weight holder having a passage through which the receiving pan may be loaded with the free-flowing substance;
(b) loading the calibration weight holder with a calibration weight, calibrating the weighing cell, and subsequently removing the calibration weight;
(c) loading the receiving pan with a batch of the free-flowing substance and measuring the weight of the free-flowing substance residing in the receiving pan;
(d) removing at least part of the of the free-flowing substance from the receiving pan; and
(e) repeating steps (c)-(d) with or without first repeating step (b);
wherein, the calibration weight holder can be loaded with the calibration weight independently of the load status of the receiving pan.
14. A method according to claim 13 , wherein the loading of the calibration weight holder or of the receiving pan is automated.