User manual

VTLD100
18.05.2010 ©Velleman nv
6
LCD
1 laser ON 5 single mode
2 reference level top 6 battery status
3 reference level bottom 7 memory address
4 measuring function 8 device error
area 9 max./min. indication
volume 10 first value + unit
1
st
indirect measurement 11 second value + unit
2
nd
indirect measurement 12 last measurement or
calculation result
6. Measuring conditions
Measuring range
• The measuring range is limited to 50m.
• In dark environments or at night this range may increase.
• In very light environments or when a surface has very poor reflective
properties, use a target plate.
Target surfaces
• Measuring errors will occur when pointing at colourless liquids (e.g. water)
or glass, Styrofoam or similar semi-transparent surfaces.
• Aiming at very shiny objects will deflect the laser beam which will lead to
errors.
• Measuring towards non-reflective dark surfaces may increase the
measuring time.
• Do not aim the meter directly into the sun or other bright light source.
7. General functions
Refer to the illustrations on pages 2 and 3 of this manual.
• Make sure batteries are present inside the device. Refer to §11.
Switching ON/OFF
• Press the ON/measuring button [a] to switch the device and laser on.
• Press and hold the clear/OFF button [j] to switch the device off.
Note: the laser will automatically switch of after 30s, the device will
switch off after 3 minutes of inactivity.
Clear button
• Press the clear/OFF button [j] to cancel the last action.
Reference level
• Press the reference button [h] to switch the reference level between
top [2] and bottom [3] (refer to illustration B). The device produces a
warning beep when the setting is changed.
[2] measuring starts at the top of the meter
[3] measurement includes length of meter (default)