Spider-80SG/SGi
The Spider-80SG/SGi is an eight-channel strain/temperature sensor processing
system module useful for a wide range of physical tests and measurements.
Spider-80SG/SGi is a natural adjunct to Spider-80X systems for machinery
monitoring and modal analysis applications. This is a flexible module appropriate
for low frequency “static” stress/strain measurements and bearing temperature
monitoring as well as rapid dynamic stress analysis in vibration studies and
modal analysis. Though somewhat intricate to install, the tiny and nearly
massless strain gage is a marvelous sensor for vibration studies. It provides low-
frequency sensitivity unmatched by accelerometers and does so without mass
loading the object under study. Proper strain gauge installations can provide
much focused information, allowing you to separate tensile, bending and
torsional effects in a structure’s responses. Integrating these benefits within a
DSA system facilitates new levels of structural understanding.
The Spider-80SG/SGi module can be network-integrated or PC connected
through its Ethernet connector. It will precisely measure strain, based upon
detecting small changes in resistance when a wire or foil strain gage is stretched
or compressed. In similar fashion, it will accurately measure temperature from
resistance changes of a resistive temperature detector (RTD). It measures these
with 24-bit digital precision. Use it at sample rates up to 102.4 kHz to track
dynamic strain variations, or let it clock as slowly as o.48 Hz to trend near-DC
temperature trends.
Each input channel is a dedicated DC-excited Wheatstone Bridge circuit with 24-
bit digital output. Spider-80SG/SGi provides precision bridge-completion
resistors for use with either 120Ω or 350Ω gages. A precision calibration shunt
resistor is also provided, and shunt calibration is accomplished with a single
command. The software also provides facility for physical input calibration. The
module will auto-balance all channels upon command. There is no need to turn
potentiometers or switch resistors into the circuit; all module controls are through
software.
Spider-RTDi
Spider-RTDi controller is specially developed for temperature environment
chamber test. It integrates the control of temperature, humidity and vibration all
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