Category Archives: Beitrag
Temperature Sensors in Pipelines: Identifying Heat Conduction and Insufficient Immersion Depth as Measurement Errors
A Pt100 in a pipeline consistently indicates 4 or 5 °C less than a reference...
Measuring Differential Pressure Across Filters: Detecting Condensate, Clogged Impulse Lines and Zero-Point Errors
The differential pressure across a filter continues to increase – even though the filter was...
pH Sensor Drifts or Responds Slowly: Check Deposits, Reference System and Temperature
A pH sensor has just been calibrated but still shows a slowly drifting value in...
Data Loggers at Sub-Zero Temperatures: Planning Battery Life, Display Performance and Data Storage Correctly
According to the datasheet, a temperature data logger may be approved for operation at -30...
Trend-Based Evaluation of Battery Internal Resistance: Using Individual Values, Temperature and Cell Comparison Correctly
When maintaining UPS systems, stationary battery systems, telecommunications installations or other DC power supplies, measuring...
Correctly Evaluating Capillary Rheometers: Understanding Pressure Channels, Wall Slip and Shear Viscosity
In plastics processing, a single viscosity value alone does not determine how a polymer behaves...
Bargraph Display for Process Values: Correctly Configuring Limits, Hysteresis and Colour Switching
The pressure transmitter provides a stable 4–20 mA signal, but the bargraph display in the...
Pressure Measurement in Refrigeration Systems: Correctly Accounting for Refrigerants, Pulsations and Low Temperatures
A pressure sensor on the high-pressure side of a refrigeration system shows plausible values while...
Oxygen Deficiency or CO₂ Hazard: Why an O₂ Sensor Does Not Replace Carbon Dioxide Monitoring
An oxygen sensor is installed in a cold room, fermentation cellar or laboratory. The display...
Radionuclide Identification in Mixed Radiation Fields: Correctly Assessing Shielding and Overlapping Spectra
A radionuclide identifier initially reports Cs-137. After a longer measurement, a second nuclide appears with...