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HBMA0114-6.3 en
• Signal amplification
The net signal can be amplified to obtain a sufficiently high resolution even
with measurement tasks with great initial load. Use switch S101 to adjust the
amplification in four steps:
S101/2 S101/3 S101/4 S101/5 Amplification
ON OFF OFF OFF v=1
OFF ON OFF OFF v=2
OFF OFF ON OFF v=5
OFF OFF OFF ON v=10
Example
A load cell with 10 kg nominal load is used with an initial load of 4 kg. The
mass to be weighed is 1 kg.
To avoid amplifier overload the amplifier’s measuring range must be adjusted
to maximum signal (here 5 kg=10 V output voltage). The automatic tare unit
connected in series is used to tare the initial load (4 kg=8 V). The remaining
residual signal of 1 kg corresponds to an output voltage of 2 V. Subsequent
amplification by factor 5 enables the residual signal to be raised to 10 V.
• Low-pass filter adjustment
Use switch S100/5 to activate the filter for the automatic tare unit, only, or also
for the peak-value store. Upon taring, the low-pass filter influences the input
signal. However, it has no effect on the tare output’s bandwidth.
S100/5 Position P1 (cutoff frequency) Influences
OFF
0.4 Hz
12.5 Hz
5 Hz
tare unit
ON
0.1 Hz
3.1 Hz
1.7 Hz
tare and
store unit
Tab. 5.2: Low-pass filter
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