Minebea Intec Pendeo PR 6204 Series, Руководство по установке

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7 Preparing for calibration
7.1 General notes
The digital load cells PR 6204 are characterized by the fact that the output signals for
each individual load cell come factory-adjusted. All cells provide the same output signal
with an equally-divided corner load (e.g. dead load).
In many cases, this considerably minimizes the adjustment efort with regards to the
scale because the software will handle the adjustment (see Chapter "Software Corner
Correction" in the instrument manual of the indicator).
Note:
For calibration of the measuring system, please refer to the manual of the
corresponding indicator.
7.2 Mechanical height adaptation
To distribute the load over the load cells as evenly as possible, height adaptation is
required in systems with more than 3 load cells prior to calibration.
Procedure:
1. Place the dead load (e.g. empty vessel) onto the load cells of the scale structure.
2. Energize the load cells in parallel with a stabilized voltage (e.g.: U
DC
= 12 V).
3. Measure the output voltages of each individual load cell by means of a digital
voltmeter and compare the individual values.
Given deviation between the output voltages of the load cells, the load on the
load cell with the lowest output voltage must be increased by putting shims
between mounting plate and weighing construction.
4. Lift the weighing object immediately beside the afected load cell.
5. Place thin, deburred sheets of metal (0.5–2 mm thick) between the upper mounting
plate and the scale structure.
6. Measure the output voltages of the load cells again and adjust the height of this load
cell or of another one.
Pendeo® Process-Digital Precision Compression Load Cell PR 6204 7 Preparing for calibration
EN-22 Minebea Intec