Author Archives: Lukas Achtelik
Voltage Unbalance in Three-Phase Systems: Correctly Assessing the Effects on Motor Current and Heating
A three-phase motor is designed for a supply system that is as symmetrical as possible....
TWA, STEL and Instantaneous Value on a Gas Detector: Correctly Distinguishing Alarm Types
A portable gas detector can monitor several different values and alarm conditions at the same...
Dynamic Weighing on Conveyor Belts: Coordinating Filter Time, Belt Speed and Measurement Window
In dynamic weighing on a conveyor belt, the measured value is generated while the material...
Measuring Dynamic Pressure Spikes via Microbore Hoses: Understanding Hose Length and DN as Part of the Hydraulic Transfer Function
When troubleshooting hydraulic systems, it is often not sufficient to know only the static operating...
Calibrating a Thermocouple with an External Reference Junction: Correctly Accounting for Reference Temperature and Connecting Cable
At first glance, calibrating a thermocouple appears straightforward: The sensor is inserted into a temperature...
Interface Measurement Using Differential Pressure: Correctly Accounting for Density Changes in Both Liquids
Separators, storage tanks and process vessels often contain two immiscible liquids at the same time....
Thermal Mass Flow Meters with Changing Gas Mixtures: Considering Composition, Gas Correction Factor and Calibration
Thermal mass flow meters are widely used in industrial gas networks, energy systems, process plants...
Retrofitting Temperature Sensors in Insulated Pipes: Correctly Considering Insulation, Contact Point and Thermal Bridges
In many existing plants, an additional temperature measuring point needs to be installed even though...
Testing two tyre inflator gauges simultaneously: ensure comparability and identical pressure conditions
Two tyre inflator gauges are to be tested in a workshop or inspection facility. Both...
Pressure measurement for ultra-high-purity gases: minimize dead volume and surfaces, avoid particle contamination
In a conventional compressed-air or process-gas system, a pressure transmitter is often selected primarily according...