PS081 datasheet(50/155 Pages) AMSCO

50 / 155 page

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PSØ81

By doing this, the gain and offset behavior of the load cell can be improved by PS081. This is a very

comfortable method to improve the quality of the complete scale without modifying the load cell or

the electronic. If this possibility is combined with an intelligent digital load cell concept the production

can be simplified at higher quality level and lower cost.

Some examples how to use Mult_TKO, Mult_TKO:

If the compensation resistor is matched to the sensor, but the bridge has an offset drift, this off-

set drift can be eliminated by software.

If the gain error of the load cell is known (e.g. stable over production lot but wrong) it can be cor-

rected directly by PS081 without going into a climate chamber.

If a run in the temperature drift chamber is done, the correction factors for Mult_TkG and Mult_

TkO can be determined very appropriate. In this case the compensation of the whole system can

be improved significantly. With such a method of post correction after fabrication of the scale, the

complete scale can be offset and gain adjusted nearly perfect and much better than required for

high end scale. (e.g. gain drift < 1 ppm/K and offset drift < 10 nV/K for the complete scale have

been achieved as best performance).

acam has written a special whitepaper (WP002) that explains in detail the many possibilities and the

importance of this option. Furthermore it provides a step-by-step guidance how to make the tempera-

ture compensation by using Mult_TkG and Mult_TkO.

Figure 3.26 Correction of Gain and Offset Drift

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PS081 Datasheet(PDF) 50 Page - ams AG