ICP
is a registered trademark of PCB Piezotronics, Inc.
Drawing Number: 21094
Revision: A
ECO #: 35764
OPERATION MANUAL FOR MICROSENSORS
132
Series
1
1.0
INTRODUCTION
132 Series Microsensors are small, piezoelectric
pressure sensors featuring extremely fast response for
measurement of short wavelength pressure pulses.
The short time constant of some models filters off the
longer duration portion of pressure pulses, allowing
differentiation of consecutive pressure pulses.
132 Series Microsensors contain integrated ICP
circuit amplifiers which operate as source followers
and provide very high-frequency response. These
micro-integrated circuit amplifiers convert the high-
impedance voltage from the crystals into low-
impedance voltage of less than 100 ohms.
Output from the microsensors may be coupled
directly into oscilloscopes, recorders and A to D
converters. Power to operate the IC amplifier and the
output signal are conducted over a single conductor,
two-wire cable with the ground serving as signal
return. Special low-noise cables are not required.
The calibrated mV/psi output of these microsensors is
not attenuated nor is noise appreciably increased by
the cable.
2.0
DESCRIPTION
132 Series Microsensors feature small diameter
pressure-sensing surfaces incorporating very small (<
1 mm) piezoelectric sensing elements. The small size
of the sensing elements imparts extremely fast
response time to the microsensors.
The charge generated by deflection of the
piezoelectric element when subjected to shock
pressures creates a voltage on the input capacitance at
the gate of the microsensor ICP
amplifier. The
amplifier, in conjunction with the source element,
transforms the input into a low-impedance output
signal of equal amplitude. The DC bias that exists on
the signal lead is removed from the output signal by a
coupling capacitor in the power supply. Resistors in
the internal ICP
amplifiers of the microsensors set
the
internal
discharge
time
constant,
which
determines the low-frequency response of the
microsensors. (Refer to General Guide to ICP
Instrumentation, G-0001, for complete details.)
Below are the available configurations for the 132
Series Microsensors.
Model 132A31 Time-of-Arrival
ICP
Microsensor
Model 132A32
Model 060A28
Clamp Nut
¼” Hex
¼-28 Thread
(supplied)
2-ft Twisted Pair
Cable Terminating into
Model 070B09 Solder
Connector Adaptor
(supplied)
Terminating into
#10-32 Coaxial
Connector
Summary of Contents for 132A35
Page 8: ......
