Pulse Width Measurement; Room Temperature And Humidity Measurement - VOLTCRAFT Multi-DMM MT-52 Notice D'emploi

j) Pulse Width Measurement
Pulse width measurement enables measuring of the positive
hal-wave of a measuring signal. The ratio of the positive half-
wave to the total signal is displayed. For symmetrical signals
(e.g. sinus), the positive and negative half-waves are the
same length. The display shows approx. 50%.
- Turn the DMM on and select measuring function "Hz".
- Plug the red measuring lead into the V measuring socket
(9) and the black measuring lead into the COM measuring
socket (8).
- Press "MODE" button to switch measurement functions.
The symbol "%" appears in the display. Pressing this but-
ton again takes you to the first measuring function etc.
- Now connect the two measuring prods to the object to be
measured (generator, signal, etc.).
- The currently measured value is indicated on the display
- After measuring, remove the measuring lines from the
measured object and turn the DMM off.
k) Room Temperature and Humidity Measurement
The DMM enables measuring the room temperature and relative humidity via firmly installed sensors. The
two measured values are permanently displayed in the upper display area in measuring operation.
The sensors are located inside the device and react to changes of the measured value with
delays. Wait for at least 30 minutes until the device has adjusted to the ambience conditions.
We recommend waiting for approx. 2 hours to ensure precise measured values.
Proceed as follows for the measurement:
- The measuring leads are not required.
- Turn on the DMM and select any measuring function.
- In the upper left, the display shows the relative humidity in
"%RH" and in the upper right the room temperature in "°C".
- Wait until the displayed value has stabilised. This may take
up to 2 hours.
- Switch off DMM after measuring.
50