User Manual

Rev E Aug 2022
Page 3
Chapter 2 Safety
1.2 Adjustments
1) To obtain the required voltage range the offset (VR2) and gain (VR1) potentiometers may need to be adjusted.
See the circuit diagram opposite.
2) For some applications the default gain range may need changing beyond the limit of the adjustable gain. In this instance the
value of R3 may need to be changed. The following equation can be used to help determine what gain resistance is needed.
1.3 D-Type Connections
Pin1: Oscillator Input
Pin2: +15v Input Supply
Pin3: -15v Input Supply
Pin4: 0v Supply
Pin5: Amplifier Output
Pin6: 0v Supply
Pin7: ID Resistor Connection
Pin8: N/C
Pin9: N/C
Note
In order to avoid saturating the Thorlabs strain gauge reader (or other piezo electronics feedback), under full strain conditions
the output should not exceed 2V Pk-Pk.
Note
The pin out of the D-Type connector is such that the amplifier can be connected directly to the Thorlabs range of closed loop
controllers. If used with the BPC301 or BPC302 seriescontrollers, the output is limited to 75 V. If the full 150 V drive is required
the BPC303 controller or KPZ101 Piezo K-Cube together with the K-Cube strain gauge reader (KSG101) should be used.
These controllers provide all the circuitry to convert the output of the preamplifier to a measure of displacement, allowing
accurate position monitoring. In addition, the preamplifier can also be incorporated into other equipment.
G = 1 + 50kΩ
RG
Where:
RG = VR1 x R3
VR1 + R3
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