Your customer is paying for high-frequency shock, pressure, or strain data. Your instruments are programmed and calibrated for a 100 kHz bandwidth. Are long cables limiting your actual measurement bandwidth?
The bandwidth of a measurement system that includes remotely located strain gages and Wheatstone bridge-based sensors is affected by the capacitance of the connecting cables interacting with the output impedance of the sensor. Commonly referred to as cable roll-off, this frequency response – typically characterized in terms of the -3 dB cutoff frequency of an equivalent RC filter – can be calculated, but requires accurate determination of the relevant R and C. These values can be difficult to measure or estimate and are not always specified by cable manufacturers.
In a newly released white paper, Precision Filters explains how to predict and measure roll-off for cable-sensor pairs in common measurement circuits. Download the paper today to learn more about:
What is C?
How to model and measure the applicable capacitance of a multi-conductor cable
What is R?
How to determine the applicable sensor and cable resistance
How do I verify the roll-off on my cables?
How to easily measure cable roll-off in your measurement system with Precision Filters AC Shunt Calibration
Can I estimate roll-off without making any measurements?
How to estimate roll-off using commonly provided manufacturer specifications for cables and sensors