Differential Pressure Flowmeter Components and Installation
Technical guide to differential pressure flowmeter installation and troubleshooting, detailing impulse tubing layout, three-valve manifolds, and common fault remedies.
Measurement & Test Instruments
Volt-ampere Method for Measuring Resistance
Tutorial on resistance measurement using the volt-ampere method: assemble circuit, measure voltage and current, apply Ohm's law (R = U/I), record multiple readings and average.
Principles of Structured-Light Phase Unwrapping
Survey of phase unwrapping for structured-light 3D measurement, comparing temporal, spatial, multi-frequency, Gray-code, number-theory and deep-learning approaches.
How Instrument Impedance Affects Voltage Measurements
Investigation of lower-than-expected DC from a PWM RC low-pass filter: multimeter loading by source output impedance forms a voltage divider; use high input-impedance meters.
First event-based shortwave infrared detector
Overview of SCD's Swift-El SWIR detector: a 640×512, 10 μm VGA sensor with event-based imaging and dual video channels for high-speed tactical and machine-vision use.
Water Level Measurement Circuit
Explains a simple water level measurement circuit using probes, resistors and transistors; shows low/high level detection via LEDs and transistor switching.
16 Methods for Measuring Part Features
Guide to selecting specialized micrometers and calipers for hard-to-reach features: pipe wall, grooves, bores, splines, gears, threads and stepped or concave surfaces.
Search Superheterodyne Radar Frequency Measurement
Overview of search superheterodyne frequency measurement systems, frequency search modes (continuous, stepped) and strategies for selecting frequency search speed.
Measuring Ground Resistance with a Ground Tester
Technical overview of ground resistance tester principles, acceptable grounding resistance values, measurement procedure, and probe placement precautions for accurate ground testing.
Oscilloscope Probe Principles
Explains oscilloscope probe attenuation and compensation: DC resistor divider and AC capacitive divider principles for X20 probes, calibration with 1 kHz square wave.
Ultrasonic Infrared Thermography: Principles and System Components
Survey of ultrasonic infrared thermography: principles, system components, simulations and applications for crack detection in metals, composites, aero-engine blades and concrete.
Using S-Parameters to Analyze Microwave Networks
Overview of S-parameters in microwave and RF design, explaining two-port S11/S21 interpretation, measurement with network analyzers, and signal/power considerations.
