Perel HMUSD2 Mode D'emploi page 5

Calculating a Volume
This function can be used to measure the volume of a room. Press the
volume measurement key. Measure the length of the room first (displayed
upper value). Now, measure the width of the room (displayed upper value).
Finally, measure the height of the room. The volume will appear as the
lower value (in m³ or ft³).
Adding Up Distances
This function can be used to add different measured distances. Press the
addition key first and measure your different distances. The meter will add
the distance to the previous value as you measure. Note that the maximum
distance is 100 m or 100 ft.
Storing Measurements
This meter has 5 memory sets. Measure a distance, surface area or volume
and press STORE. Note that a value cannot be overwritten when all sets are
occupied. Erase the memory first by holding the ESC/CLEAR key pressed for
a few seconds.
Recalling Stored Data
Press the RECALL key. Note that when recalling a surface area or a volume
all distances have been memorized separately. Press several times to recall
the length, the width and the height separately.
Clearing Data
Press ESC/CLEAR to clear the read-out. Hold ESC/CLEAR pressed for 3
seconds to clear the memory.
8. Remarks
 For accurate results, choose a surface which is flat and as large as
possible.
 It is not possible to measure through glass. Note that this distance
meter cannot measure the distance of an object through glass although
the laser will reach the object to be measured. Measuring is done
through ultrasonic waves and not through the laser.
 Air flows can affect the read-out when measuring a distance than 12 m.
 Choose your measurement units (metre or feet) prior to measuring or
calculating.
 It is not possible to measure the distance of sound-absorbing objects
(e.g. cloth curtains).
 Measuring accuracy is dependent of the surface nature of the measured
object.
 Make sure to place the ultrasonic meter at an angle of 90° compared to
the measured object. Use a spirit level if necessary.
 Strong wind, objects in the measuring line and environmental conditions
may affect the measuring results. Therefore, make sure to let the
V. 02 – 08/09/2014
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HMUSD2
5 ©Velleman nv