PCB Piezotronics RH401B04 Installation And Operating Manual page 6

1. INTRODUCTION AND DESCRIPTION
The Model 401B04 is a unity gain, non-inverting, impedance-converting voltage amplifier with the same
characteristics as the built-in ICP
accelerometers. This model consists of MOSFET circuitry packaged in a convenient Pomona box with BNC
connectors. When used in conjunction with a signal generator or oscillator, it can be used in place of an ICP
sensor to calibrate ICP
frequency response of systems with long input cables. (The Model 401B04 simulates the circuit of an ICP
sensor while the signal generator takes the place of the sensor's crystals.)
2. INSTALLATION AND OPERATION
CAUTION: Connect the output only to an ICP
WARNING: Excessive current may damage this model. Measure the ICP
current prior to connecting the 401B04. The ICP
2.1 CALIBRATION OF ICP
Refer to the acceptance test procedure for your particular PCB signal conditioner, dual mode charge
amplifier, or digital peak meter model. (Acceptance test procedures are available for most PCB electronic
products. Consult factory for details.)
Connect a signal generator or oscillator to the input jack of the 401B04, after observing the caution and
warning above. Connect the output jack of the 401B04 to the ICP
tested. (Various cables and adaptors are available from PCB as needed.) Switch on the signal
conditioner and note the output bias voltage on the meter as you would for any ICP
should read mid scale, indicating that the 401B04 is operational. Follow the acceptance test procedure
for your particular PCB model. The exact gain factor (near unity) of the 401B04 is noted on the
calibration certificate supplied with the unit. The nominal value of Gain = 1.0 is on the housing of the unit.
401B04 ICP
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amplifiers provided in most PCB pressure sensors, force sensors, and
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sensor signal conditioners, do system verifications and gain adjustments, or check
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SENSOR SIGNAL CONDITIONERS
Frequency Counter Frequency Counter Frequency Counter
Function Generator Function Generator Function Generator
Digital Volt Meter Digital Volt Meter Digital Volt Meter
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Sensor Simulator
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type, current-limited signal conditioner.
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excitation current should be ≤20 mA.
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sensor signal conditioner being
Oscilloscope Oscilloscope Oscilloscope
Signal Conditioner Signal Conditioner Signal Conditioner
(Unit Under Test) (Unit Under Test) (Unit Under Test)
401B04 Simulator 401B04 Simulator 401B04 Simulator
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sensor signal conditioner
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sensor. The meter
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