PCB Piezotronics M132A31, Installation And Operating Manual, Page: 8 / 10

ICP

is a registered trademark of PCB Piezotronics, Inc. Drawing Number: 21094
Revision: A
ECO #: 35764
OPERATION MANUAL FOR MICROSENSORS
132 Series
3
4.1 OPERATION BEYOND RANGE
SPECIFICATION
Because 132 Series Microsensors can be installed
using RTV-like potting materials to hold them in
place, maximum pressure specifications are given to
prevent the sensors from being extruded from the
mounting
holes. Static or slow dynamic
overpressures are more apt to cause a problem than a
short dynamic shock pulse. Use of backing nuts will
minimize the possibility of a problem.
The microsensors are capable of responding to
dynamic overpressures up to ten times the specified
range. The output will be “clipped” (look flat-topped
on the readout) after about 10 volts.
The initial rise of the output will be accurate up to the
point of clipping. This can allow for an accurate
time-of-arrival measurement, even though the peak
pressure cannot be measured.
5.0
CALIBRATION
A shock tube is used to calibrate the microsensors.
6.0
MAINTENANCE AND REPAIR
Except for repair of wires, the microsensors are not
field-repairable. In case of serious malfunction,
contact the PCB at (888) 684-0011.
It is well to observe the following precautions in
using the microsensors:
1.
Do not exceed specified pressure levels without
proper mounting.
2.
Do not subject microsensors to temperatures
exceeding 174
°
F (79 °C).
3.
Do not apply voltage to sensors without current-
limiting diodes or other current protection. (PCB
ICP

power supplies feature proper voltage and
current protection.)
4.
Do not apply more than 20 mA of current to the
microsensors.