DME manual ENU rev. March 2011
©Haglöf Sweden AB
Welcome as an operator of a professional Haglöf Sweden® measuring solution! Our instruments are
always developed in close collaboration with forest pro’s from every corner of the world, and we sincerely
hope you will be pleased with your new precision instrument. The DME is a useful tool in forest cruising
work, and especially when working in sample plots. The ultra sound technology in the DME works also in
dense forests and for distances up to 30 m/yds and more.
Before starting to use the DME
The DME uses ultrasonic impulses to determine a distance. The speed for the ultrasonic signals to travel in the
air depends on factors such as air humidity, air pressure and above all, the air temperature. The DME has a
built-in temperature sensor that automatically will compensate divergences and give correct distance measures
even if temperature changes. At delivery, the instrument has a basic setting installed that normally gives the
measuring fault under 1%. To obtain optimal measuring result accuracy, the instrument should be checked and
calibrated on a regular basis.
Functions in the DME measuring instrument
Number/Pressures Function Other Display Features
[ F1 ]
Distance measuring
[
- - - -
]
The DME is operating.
[ F2 ]
The DME can be used based on a selected
Prism Factor. See F4 for prism factor
selection. Minimum tree diameter
Based on a distance and prism factor will
be displayed.
[ F3 ]
Measuring unit is reset to transponder
function
[ trP ] Measuring unit set as transponder.
[ F4 ]
Select prism factor to be used when
calculating the minimum diameter, see
[F2] English = 5, 10, 15 and 20 --
Metric = 0.5, 1.0, 2.0 and 3,0,
Make selection by pressing the
red button.
[ F5 ]
Change measuring unit, Meter or feet
[ F6 ]
No function, Space reserved
[ F7 ]
Temperature
[ F8 ]
No function, Space reserved
[ F9 ]
Calibration
To switch between transponder TYPE 1 or TYPE 2.
1. Remove the battery.
2. Pressure and hold down the button and insert the battery in position.
3. Change transponder type.
[tYP1]
or
[tYP2].
Transponder T3
The transponder is an ultrasonic transmitter and receiver that communicates
with the DME. T3 can be used for direct measuring (pinned to a tree stem) and
for plot work in a full 360-degree circle, with the adapter and monopod.
The transponder T3 has an audible beep signal that determines if it is activated.
The DME instrument works as a remote control, where the T3 and the signal
are turned off and on with the measuring unit.
The transponder uses only one AA cell battery placed under the lid.
To measure in a 360 degree circle, use the adapter and monopod. The adapter is screwed on
the monopod staff
Ultrasonic loud speaker
Ultrasonic microphone
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