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voltage from the gauge.
Maximum Metallic (foil) gauge can be normally 50% ~ 75% for the stability and
good S/N (signal to noise).
Exclusive voltage should be applied for the semi conductive gauge.
To control the sensor proper voltage of the amplifier, please turn the bridge
voltage switch.
4-9. Bridge balance
Generally, when the bridge balance is too much out, you cannot carry out the
measurement for the wide range since the measurement value will be clipped.
Also you should compensate the bridge balance since a damage can be made on
hardware.
For the compensation, please press the Auto switch on the front side of amplifier
then "Auto" will calibrate the balance automatically.
Please control the volume for the rest output voltage to set Zero.
4-10. GAIN control
Firstly, please turn the gain switch in a clockwise to set (X1, X10, X100, X400,
X1000) gain.
Or you can turn 10-turn volume so that you can control gain (X1 ~ X11).
The gain noise is originated by input voltage. So when the input voltage is
increased, the noise will be increased accordingly. So please set the gain
according to the size of sensor.
While you are carrying out stress analysis, please compensate as following so that
you can get the precise information. (in case 1 active gauge is used)
Vout : Output voltage of amplifier
B
V
: Bridge proper voltage
A
: Amplifier gain
K
: Gauge factor
For the Transducer, please use the following formula by using the output value
you know.
K
Vout
V
A
B
4
11
6
10
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