Measuring functions

The Digital Multimeter offers the following measuring functions:

  • Measurement of alternating voltage
  • Measurement of the frequency of alternating voltage
  • Measurement of direct voltage
  • Measurement of alternating or direct voltage in the millivolt range
  • Measurement of alternating or direct voltage with lower input impedance (approx. 3 kΩ) to suppress reactive voltages (inductive/capacitive)
  • Measurement of resistance
  • Continuity test
  • Diode test
  • Measurement of the capacitance
  • Measuring direct current in the microampere range
  • Measurement of the temperature in °C or in °F
  • Measurement of alternating current
  • Measurement of the frequency of alternating current
  • Measurement of direct current

The bar graph display (k) resembles the needle of an analogue multimeter. As the bar graph display reacts faster than the digital display, it is suitable for setting peak points and zero points.

The bar graph display is deactivated while measuring the capacitance and the temperature. For frequency measurements, the bar graph display and measuring range display show the underlying voltage or current up to 1 kHz.

The number of segments indicates the measured value and is relative to the full scale value of the selected measuring range, which is displayed on the right-hand side of the bar graph display.

  • Use for measurements always the proper input terminals, switch position and measuring range.
  • Check the test leads for continuity before use. Do not use if the readings are high or noisy.
  • Keep your fingers behind the finger guards while using the test leads.
  1. Turn the rotation switch (2) to the position in the figure.
  2. Press the Sel button when it is shown in the figure.
  3. Connect test leads (7) and (8) as shown in the figure.
  4. Contact the test points with the test probes.
  5. The measured value is shown on the display (1).

  1. Take the measurement via see Measuring Process.
  2. Use the manual range selection (Range button) to select lower and lower ranges in order to achieve a stable measurement.

Frequency measurement is only carried out with alternating voltage.

  1. Take the measurement via see Measuring Process.

  1. Take the measurement via see Measuring Process.
  2. Use the manual range selection (Range button) to select lower and lower ranges in order to achieve a stable measurement.

  1. Take the measurement via see Measuring Process.

  1. Take the measurement via see Measuring Process.

  1. Take the measurement via see Measuring Process.

  1. Take the measurement via see Measuring Process.

  1. Take the measurement via see Measuring Process.
  2. If necessary, use the manual range selection (Range button) to select a suitable measuring range.

  1. Take the measurement via see Measuring Process.
  2. If the continuity test is successful, a continuous tone is output.

The continuous tone also sounds when the sound output is switched off.

  1. Take the measurement via see Measuring Process.
  2. If the diode is intact, a measured value of approx. 0.2 V to 3 V (depending on the type of diode) is shown in the direction of flow on the display (1). If the measurement is taken in the reverse direction, 0L is shown on the display .
  1. Take the measurement via see Measuring Process.
  2. If the diode is defective, a measured value < 0.1 V (no voltage drop) is shown in the direction of flow on the display (1) and an audio signal is output. If there is a short circuit in the direction of flow, 0 is shown on the display and an audio signal is output .

Perform a measurement of the direct voltage to confirm whether the capacitor is discharged.
  1. Take the measurement via see Measuring Process.

  • Do not take any measurements if the open-circuit potential to earth is more than 600 V.

Example: Measuring the ionisation current in gas burners

  1. Switch the gas heater off.
  2. Insert the test leads/test probes between the flame sensor probe and the control module of the gas heater.
  3. Switch the gas heater on.
  4. Measure the ionisation current see Measuring Process.

Measuring the AC voltage with a lower input impedance leads to the measuring tool heating up and this may affect the subsequent temperature measurement. Allow the measuring tool to cool down at room temperature for approx. 10 minutes in order to achieve greater accuracy in a subsequent temperature measurement.
  • Do not touch current-carrying objects with the tip of the temperature probe (Type-K)  (24). There is a risk of injury due to electric shock.

Fit the thermocouple adapter (19) and the temperature probe (Type-K) (24) see Fitting the Thermocouple Adapter .

  1. Turn the rotation switch (2) to the position. Press the Sel button to measure the temperature in °F .
  2. Contact the test point with the probe of the sensor Type-K (24).
  3. The measured value is shown on the display (1).

  • Do not take any measurements if the open-circuit potential to earth is more than 600 V.
  • If the rotation switch is turned to position A or from position A, an audio signal will sound and LEAD will appear on the display. Then check whether the test leads are connected to the right sockets.
  1. Disconnect the power supply in the circuit to be measured.
  2. Interrupt the circuit and insert the test leads/test probes in series.
  3. Switch the power supply back on.
  4. Take the measurement via see Measuring Process.
  5. Use the manual range selection (Range button) to select lower and lower ranges in order to achieve a stable measurement.

Frequency measurement is only carried out with alternating current.

  1. Disconnect the power supply in the circuit to be measured.
  2. Interrupt the circuit and insert the test leads/test probes in series.
  3. Switch the power supply back on.
  4. Take the measurement via see Measuring Process.

  • Do not take any measurements if the open-circuit potential to earth is more than 600 V.
  1. Disconnect the power supply in the circuit to be measured.
  2. Interrupt the circuit and insert the test leads/test probes in series.
  3. Switch the power supply back on.
  4. Take the measurement via see Measuring Process.
  5. Use the manual range selection (Range button) to select lower and lower ranges in order to achieve a stable measurement.