SGA01 Strain Gauge Amplifier
30/04/2008
Page 5 of 6
Calibration
Calibration of the Strain Gauge Amplifier takes place in two steps, or two steps per channel if more than one channel is being used: offset calibration and
scale calibration.
First calibrate the offset by subjecting the load cell to the conditions that relate to a zero value (typically no load). With the required load applied, adjust the
“Offset” screw for that channel until the output voltage reads 0V.
Next, calibrate the scale by subjecting the load cell to a known non-zero value. With the required load applied, adjust the “Scale” screw for that channel until
the output voltage gives the voltage desired for the applied load.
Repeat for the second channel if necessary.
Specification
Supply Voltage
6V – 18V DC
CMRR
90dB typical (77dB minimum)
Bridge Supply Voltage
5V
±
2mV
Output Range
±
9V
Gain
25 – 1000 (adjustable)
Operating Temperature
-40
°
C – +85
°
C
