by Jesse Morse If a person making a dc or low frequency measurement fails to select the proper cables, or to properly connect the shields the traceability chain for that measurement can be violated. This […]
By Tom Morgan A method is derived for calculating the resistance tolerances for non-linear resistance scales, whose accuracy tolerances are given in degrees of arc instead of percent of reading or range. Read the Full […]
by Michael Schwartz Today’s new high dynamic range power sensors are not built the same as the older generations of sensors. Older generations of power sensors only had a correction table for their frequency response. […]
by Edward Morrell High-speed clearance sealed piston provers for measuring gas flow rates have been available for over twenty years and have gained wide acceptance as a fast, cost-effective, primary calibration instrument for gas flow. […]
by Charles Sperrazza Verification of the Standing Wave Ratio (SWR) of the 50 MHz 1 mW output power reference is a key step in performing a calibration of a RF power meter. Higher than desired […]
by Agilent Technologies Connectors, adapters, and calibration standards in the millimeter-wave frequency range (26 GHz to 70 GHz) are VERY expensive. Although all connectors eventually wear, with knowledge, care, and proper technique, you can easily […]
By Jay Klevens Accurate electrical current measurement is critical to the power and electrical test industries. DC and low frequency ac current is usually measured using a current shunt. Shunt calibration has unique error sources […]
By Martin L. Kidd This Metrology 101 article addresses the impact of thermoelectric voltage (EMF) on low-voltage measurements. Using a high precision digital multimeter, the author demonstrates how you can inadvertently introduce thermal EMF errors. […]
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