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...
SIPART PS2 Valve Positioner Oscillates: Check Control Valve Friction, Actuator and Controller Parameters
The control valve is supposed to remain constantly at, for example, 45 %. The SIPART...
Monitoring Alternative Insulating Gases: Why SF₆ Density Monitoring Devices Are Not Automatically Suitable for Gas Mixtures
An existing SF₆ switchgear installation is being expanded with a new generation of gas-insulated switchgear....
Isolation Transformer or Autotransformer: Correctly Distinguishing Safety, Galvanic Isolation and Power
A variable AC voltage is required in the laboratory. A variable autotransformer, for example, provides...
Measuring Conductivity Correctly: Select the Right Cell Constant and Temperature Compensation for the Medium
A conductivity sensor indicates 850 µS/cm even though a reference measurement shows only around 85...
Cloud Connection Fails: Design Edge Alarms and Local Data Buffering for Reliable Operation
The pressure monitoring system of a plant operates reliably for months. Measured values are automatically...