Category Archives: Beitrag

Choosing the right digital multimeter: Understanding TRMS, CAT category and measuring range

A digital multimeter is one of the most important measuring instruments in electrical service, maintenance,...

Digital multimeter or two-pole voltage tester: Which device is right and when?

Digital multimeters and two-pole voltage testers are often used for similar tasks in practice. Both...

4–20 mA pressure sensor provides no signal: Checking the wiring correctly

If a 4–20 mA pressure sensor does not provide a signal, a sensor defect is...

Insulation measurement according to VDE: Why it is important and which errors occur frequently

Insulation measurement is one of the most important tests in electrical installations. It shows whether...

Motor draws too much current: Detecting overload with a clamp meter

If a motor draws too much current, this is an important warning signal. The cause...

Transit-Time or Doppler: Which ultrasonic measuring principle suits the medium?

Ultrasonic flow meters are often used when liquids need to be measured contactlessly, retrofitted or...

Multimeter measures incorrect values: Why LoZ, TRMS and measurement category are decisive

If a multimeter appears to display incorrect voltages or unusual values, the measuring instrument is...

Differential pressure transmitter delivers implausible values: Check manifold, impulse lines and zero adjustment

If a differential pressure transmitter delivers implausible values, the cause is not always the measuring...

Detecting phase loss or unbalanced load: Current measurement in three-phase systems

In three-phase systems, the currents on the phase conductors L1, L2 and L3 should match...

Testing wallboxes and charging stations: Which measurements are important for EVSE systems

Wallboxes and AC charging stations are now part of the electrical infrastructure in many companies,...