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Basic settings
Switching the acoustic signal on/off
1. Press the Minus button (8) for a long time to switch the
acoustic signal on or off.
ð The switch-on/off process is confirmed by a brief
acoustic signal.
Aborting the measurement and deleting the display
1. Briefly press the Delete button (12) to abort the current
measurement or to delete the displayed measured values
one at a time.
Setting the reference value
The device always measures the total distance starting at the
reference point. This means that if the rear end of the device is
set as reference point, the length of the device will be part of
the measurement. By default the reference point is set to the
rear of the device. You can, however, also relocate the
reference point to the front part of the device. Please proceed as
follows:
1. Press the Reference button (14) to relocate the reference
point to the front end of the device.
ð An acoustic signal is emitted each time the reference
point is relocated. Additionally, the indication Reference
value front (30) appears.
When switching the device off and then on again, the reference
value will automatically be relocated to the rear end of the
device.
Changing the units
1. Briefly press the Unit button (11) to switch between the
units for the measured values. Available units are m,
ft in,in and ft.
Info
If no measurement has been performed yet and if you
want to switch to another unit, there will be no unit
indication at first if you select ft in. Only if a
measurement is performed or if measured values are
already available will the measured values be
displayed in the xx' yy'' format.
Displaying the inclination
1. Briefly press the Inclination button (15).
ð The inclination of the device will be indicated in the
Inclination display (34).
EN
Calling up a measured value in the device history
The device automatically saves the last 10 measured values.
The saved measured values can be called up as follows:
1. Press the Save button (13) to call up the history.
2. Briefly press the Minus button (8) or the Plus button (17) to
navigate through the history and call up the saved
measured values.
3. You can return to the normal measuring menu by briefly
pressing the Delete button (12) or the Measurement
button (7).
Setting the timer
The device is provided with an internal timer, which can be used
to set a delay after which the measurement begins. The timer
can be used for all measuring operations.
• Briefly press the Timer button (10) to activate a delay of
5 seconds.
• Press and hold the Timer button (10) until the desired time
is displayed (30 seconds max.).
• Let go of the Timer button (10) to start the timer.
– The Timer indication (33) and a countdown (26)
indicating the remaining seconds will appear on the
display.
– The last five seconds are each accompanied by an
acoustic signal.
– After the expiration of this time the measurement is
performed.
Carrying out measurements
Warning of laser radiation
Laser class 2, P max.: < 1 mW, λ: 400-700 nm,
EN 60825-1:2014
Do not look directly into the laser beam or the opening
from which it emerges.
Never point the laser beam at people, animals or
reflective surfaces. Even brief eye contact can lead to
eye damage.
Examining the laser output aperture by use of optical
instruments (e.g. magnifying glass, magnifiers and the
like) entails the risk of eye damage.
When working with a laser of class 2, observe the
national regulations on wearing eye protection.
laser distance measuring device BD21 / BD26
7
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