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(read
IEEE Control Magazine's People in Control article on the SIM900
series)
The SIM960 Analog PID Controller is a unique instrument intended
for the most demanding control applications. It combines analog
signal handling with digital control, giving you the best of both
worlds. High-bandwidth (100 kHz) control loops may be implemented
without discrete time or quantization artifacts.
The low-noise front end brings better performance to noise sensitive
applications including laser power and wavelength stabalization,
cryogenics, scanning probe microscopy, and others. User settable
gain of up to 1000×means greater
flexibility, reducing the need for input preamplification. The unit
can be used together with the SIM921 AC Resistance Bridge providing
a flexible and cost-effective temperature control solution.
An internal ramp generator can control voltage slew rate between
predefined start and stop setpoints. The output is clamped within
upper and lower user limits to guard against system overload. The
conditional integration electronics provide anti-windup on the integrating
capacitors, leading to faster recovery from saturation conditions.
Front-panel control enables easy modification of system parameters
and convenient monitoring of input and output signals. Power and
serial communication are via a 15-pin D-sub connector which mates
with the SIM900 mainframe. All instrument parameters can be set
and queried via the serial interface.
The amplified error signal (P × ε) and the
output may be monitored with an LED bar display or via the millivolt
resolution numeric display. The Setpoint and Measure input signals
can also be monitored on the numeric display.
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