Assessing a pH electrode: identifying slope, zero point and aging from calibration
A pH electrode can still be calibrated successfully, but the process takes increasingly longer. In...
Hydrogen pressure measurement with many load cycles: taking pressure cycling and measuring diaphragm fatigue into account
A hydrogen pressure sensor has a measuring range of 0 ... 400 bar and is...
SITRANS P320 with pulsating process pressure: correctly distinguishing electronic damping from real pressure peaks
A SITRANS P320 measures the pressure downstream of a pump. Without additional damping, the displayed...
Dynisco melt pressure sensor installed too deep or too shallow: correctly checking diaphragm position in the mounting hole
A melt pressure sensor is screwed back into the extruder after maintenance. The output signal...
Transmit measured value plus quality status: using Good, Bad and Uncertain meaningfully in IIoT data models
A pressure sensor has been reporting a constant value of 6.42 bar for hours. The...
4–20 mA display in the current loop: calculating load, supply voltage and available loop voltage
A two-wire pressure transmitter is supplied with 24 V DC and sends its measurement signal...
Micro-ohm measurement on busbars using four-wire technology: controlling contact placement and thermoelectric voltages
During maintenance of a switchgear system, the contact resistance of a bolted copper busbar connection...
Catalytic LEL sensor after high gas concentration: correctly assessing overrange, recovery time and functional testing
A portable gas detector is exposed to a very high concentration of combustible gas during...
Checking a load cell after shock overload: systematically assess zero point, linearity and mechanical stop
A heavy component accidentally falls onto a weighing platform. Afterwards, the scale is unloaded and...
MINIMESS test point at very low pressure: consider check valve opening mechanism and measurement errors
A MINIMESS test point is used on a system to check a comparatively low pressure....