Velleman PEREL HMUSD2, Руководство пользователя, Страница: 4 / 26

HMUSD2
V. 02 – 08/09/2014 4 ©Velleman nv
 alarm function for wrong readings
 with carrying pouch
5. Overview
Refer to the illustrations on page 2 of this manual.
1 ultrasonic sensor 9 escape/erase
2 laser 10 addition
3 LCD 11 store data
4 front (Fm)/base (Bm)
measurement mode 12 recall memorized data
5 feet (Ft)/meter (M)
conversion 13 on/off key
6 READ key 14 belt clip
7 area measurement 15 battery cover
8 volume measurement
6. Battery Installation
Use a fresh alkaline battery to ensure accurate measurements. Replace the
battery when the
symbol appears on the display.
1. Open the battery cover at the back of the meter using an appropriate
Phillips-head screwdriver. You may need to remove the belt clip.
2. Remove the old battery and insert a new one.
3. Close the battery cover and slide the belt clip into place.
7. Operation
Activating/Deactivating the Meter
Press the on/off key to activate or to deactivate the meter. The device is
sensitive to changes in temperature and humidity. Wait ± 15 minutes and
let the device reach room temperature prior to use. Note that the backlight
will automatically switch off after ± 5 seconds. The meter itself will
automatically switch off after ± 1 minute of inactivity.
Measuring Distance
Select the measurement mode. Use the Fm measurement mode when
measuring distance from where you are standing. Use the Bm measurement
mode to measure distance from wall to wall. To do so, press the Fm/Bm
key, place the back of the meter against the wall and press the READ key.
Calculating an Area
This function can be used to measure the surface area of a room. Press the
area measurement key. Measure the length of the room first (displayed
upper value). Now, measure the width of the room. The surface area will
appear as the lower value (in m² or ft²).