Residual pressure in the MINIMESS hose after disconnection: safely relieving trapped volume
A service technician measures a system pressure of 250 bar on a hydraulic system via...
Pressure controller with multiple measurement modules: using auto-ranging and measurement uncertainty correctly across the pressure range
A calibration laboratory needs to test pressure sensors with measuring ranges of 0 ... 1...
Radar level measurement in tall vessels: correctly planning antenna alignment, false echoes and signal margin
A storage tank is 35 m high and is to be monitored using a non-contact...
Electromagnetic flow meter at very low conductivity: checking minimum conductivity, electrode contact and measurement stability
According to its datasheet, an electromagnetic flow meter is suitable for liquids with a conductivity...
Pt100 characteristic curve according to IEC 60751: do not confuse α = 0.00385 with different characteristic curves
A Pt100 is tested at 0 °C and has a resistance of almost exactly 100.00...
Testing tyre inflator pressure gauges with increasing and decreasing pressure: correctly assessing hysteresis and return to zero
A tyre inflator pressure gauge is compared with a reference at 2.0 bar and also...
Operating three- and five-valve manifolds on differential pressure transmitters: using the equalizing valve and isolation sequence correctly
During normal operation, a differential pressure transmitter may measure only 120 mbar differential pressure, while...
Measuring oil content in compressed air: assessing aerosol and oil vapour as different contaminants
A compressed air system is monitored downstream of an activated carbon filter using a residual...
Statistically evaluating contamination measurements: correctly interpreting counting time, count rate and detection limit
A contamination monitor initially shows 18 Ip/s on a surface, a few seconds later 23...
Distinguishing SF6 gas density and gas pressure during filling: understanding temperature compensation correctly
An SF6-insulated switchgear system is to be refilled after maintenance. The system documentation specifies, for...