Atec Labworks-SC-121 - Manual (Page 2)

We packed the SC-121 with performance.
The Labworks model SC-121 Sine Servo Controller
incorporates the latest in microprocessor technology to
provide an economical solution to modern sinusoidal
vibration testing requirements with a remarkably conve-
nient operator interface. It is designed for use with vibra-
tion test systems requiring sinusoidal vibration between 2
and 10,000 Hz with acceleration levels ranging from .5 to
99.9 g pk and displacement requirements from .02 to 2.5
inches pk-pk.
The servo provides an output that will give a constant
displacement and or acceleration level during a swept or
stationary sine test by means of an acceleration feedback
signal.
Vibration displacement is generated internally by double
DESCRIPTION
integration of the channel 1 servo loop acceleration
signal. A dual microprocessor design ensures that all
commands bring immediate control response without
degrading the performance of the control system.
Crystal controlled digital signal synthesis and filtering
insures that the Labworks model SC-121 has performance
specifications found only in the best controllers available.
The SC-121 has two acceleration input channels to
facilitate tests requiring the comparison of two signals,
such as calibration or transmissibility tests. The
difference
output makes transmissibility determination and calibration
tests as easy as running a simple sine test.
Tests using large head shakers, slip tables or large fixtures
Wide frequency range: 2.0-6,553 Hz
or (4.0-10,000 Hz).
High resolution: 0.1 Hz. or (0.2 Hz).
Two independent input channels with
built-in conditioning amplifiers.
The built-in input amplifiers have a current
source and adjustable sensitivity.
Three separate digital meters monitor
frequency, acceleration and
displacement.
Test cycle counter displayed on
frequency meter upon demand.
Control modes: channel 1 or average
(channel 1 and channel 2).
Output modes: Log channel 1 accel., Log
channel 2 accel., Log average accel., linear
difference ratio.
Convenient user interface: requires little
or no documentation to set up or run.
Three program storage in internal non-
volatile memory for easy recall of frequently
used tests.
Analog and TTL inputs and outputs allow
the controller to function with either
a PC or other test control or recording
instruments.
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