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Strain Gauge Function ? The strain gauge acts as a
resistor in one leg of a Wheat-
stone bridge
? The strain gauge amplifi er ap-
plies voltage across the bridge at A-A (excitation voltage), causing current to fl ow through the bridge
? The resistance of the strain gauge changes as a function of the force being applied
? The output voltage across B-B changes as a function of the force being applied to the load cell. Typical Features ? DIN rail panel ? 24 Volt power
? +/- Volt or 0/4-20 mA output ? Simple gain & offset adjust-
ments
? Auto calibration ? Simple fi ltering options
? With or without display
Force Measuring - 9180 Strain Gauge Ampliļ¬ ers
All Exlar precision load mea-suring designs are incremental in nature. By this it is intended that force measurements always be conducted as the change in the signal output between the start of each load producing motion and its completion. The force measur-
ing option is not intended to be used as an absolute measure-
ment of force being applied.Exlar can provide strain gauge amplifi ers that offer a conve-
nient method for accurately and reliably measuring the resistance change per cycle of the strain gauge load cell embedded in either a GSX or
I Series actuator. These units convert the small mV changes in load cell output to a 0-10 volt or 4-20 mA sig-
nal which is proportional to the load or tension being applied by the actuator. These ampli-
fi ers can be DIN rail or panel mountable, with or without displays.
ABBA input voltage(+/- 10 Vdc usually) Output Voltage (V) Typical System Wiring Diagram
Load Cell Typical Strain Gauge Amplifi er Example Calibration and Load Information
ModelGSX40 Actuator with Load CellSerial No6090825
TypeCompression Load Cell
Calibration Factor2.1809 mV/V Full Scale
Calibration Full Scale Load20,000 Pounds
Excitation Voltage+/-10VLinearity<1%
Max Load4000 Pounds Exlar Corporation1470 Lake Drive WestChanhassen, MN 55317www.exlar.comTel: 952-368-3434Fax: 952-368-4877 See Operation Manual for wiring and operation instructions
