VOLTCRAFT PL-135 HAN, Operating Instructions Manual

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c) MEAN function (average value)
You can determine the average value using the number of readings or the measuring
period.
Number of readings
1. During measuring, push the MEAN button (11). The indicator Mean appears at
the bottom of the display (13).
2. The real-time measured value appears in the lower half of the display. Repeatedly
push the FLOW TEMP button (8) to switch between displaying the temperature,
airflow velocity and volume flow.
3. Push the ENTER button (7) to register the reading. This registered reading will
appear in the upper half of the display. Repeat this process until you have registered
the desired number of readings.
4. Push the MEAN button. The indicator Mean flashes and the calculated average
value of the registered readings is shown in the lower half of the display.
5. Push the MEAN button to return to normal measurement mode.
Measuring period
1. During measuring, push and hold the MEAN button (11) for approx. one second. The
indicator Mean appears at the bottom of the display (13). The indicator mm/ss
and four horizontal lines appear in the upper half of the display.
2. The real-time measured value appears in the lower half of the display. Repeatedly
push the FLOW TEMP button (8) to switch between displaying the temperature,
airflow velocity and volume flow.
3. Push the ENTER button (7) to begin calculating the average value based on the
measuring period. The time lapsed appears in the upper half of the display.
4. If necessary, push the ENTER button to interrupt/continue time measurement.
5. Push the MEAN button. The indicator Mean flashes and the calculated average
value of the measuring period is shown in the lower half of the display.
6. Push the MEAN button to return to normal measurement mode.