Helmholz TB20, Руководство пользователя

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TB20, strain gauge weighing module | Edition 1 | 21.12.2018 44
6 Commissioning
6.1 Initial commissioning of the TB20 strain gauge weighing module
The initial commissioning of the TB20 strain gauge weighing module can take place without the
master control system with the help of the TB20 ToolBox and the bus coupler. During the
commissioning, the characteristic of the weighing module must first be defined (see chapter 5.2.5).
Procedure for commissioning:
 Define the maximum quiescent point by setting the characteristic value of the load cell and the
rated load of the load cell in the parameter data (see chapter 6.2).
 Following configuration, the zero point of the characteristic must be defined by setting the offset
of unladen load cells. For the initial commissioning, it makes sense to set the offset to 0. (see
chapters 5.2.6 and 9.2, and 9.3)
Optional:

linearize the characteristic through configuration of the sampling points

Change offset, e.g. for a measurement vessel. The offset may only be set for an unladen scale!
There is no unladen weight function. In order to tare a measurement vessel, the weight of the
vessel must be written in the load value of the offset.
Sampling points and offset can be set as desired and at any time, and are always saved remanent in the
weighing module, even if this means that the monotony of the characteristic is violated and the value
becomes invalid.
6.2 Parameters and configuration
The TB20 strain gauge weighing module differentiates between parameter values and configuration
values.
Parameter values:
 Measuring range

Conversion rate

Values for averaging
 Number of sampling points
 Characteristic value of the load cell
 Rated load of the load cell
 Min. bridge feed voltage

Max. bridge feed voltage
Configuration of the weighing module takes place via the user program of the bus master or the TB20
ToolBox. The parameter values are loaded to the weighing module at the start of the system.