3
Figure 3-1. Low Impedance Accelerometer
LOW IMPEDANCE MICRO CIRCUIT
OMEGA has a broad line of micro circuits which yield excellent low
impedance output characteristics. These hybrid circuits often include special
filtering capabilities and protection schemes. The specific micro chip
properties are engineered to create the output characteristics desired. They
are extremely rugged and capable of withstanding extremely high shock
without damage or degradation of performance
.
Additional circuit protection
schemes Include:
• ESO protection
• cross wire protection
• over voltage protection
When used properly within specified limits, OMEGA accelerometers will
provide years of reliable, trouble-free service.
NOISE IN ACCELEROMETERS
Electrical Grounding
An accelerometer may be designed with
the output signal ground either connected
to the case of the accelerometer
or
isolated
from
the
case
of
the
accelerometer.
Case Grounded Accelerometers
Case
grounded
accelerometers
ar e
connected electrically (see Figure 3-2)
to any conductive surface on which they
are mounted. When these units are used,
care must be exercised to avoid errors
due t o ground
noise. These case
grounded accelerometer cases should not
be allowed to conduct to any outside
potential or noise source.
The case ground type accelerometer should not be selected for applications
where ground loops might be problem, such as machinery monitoring. The
OMEGA Model ACC 103 is a case grounded accelerometer.
Figure 3-2 Case
Grounded Accelerometer
