Vertex IV and Transponder T3 By Haglof Sweden AB, PO box 28 88221, 2007

Functions and Construction

The vertex IV is primarily designed to measure the height of standing objects and most often trees. The instrument can also be used to measure distance, horizontal distance, angle and inclination.

The vertex instrument has with its ultrasonic measuring technique proved to be specially useful in dense terrain with thick undergrowth, where conventional methods such measuring tapes, laser instrument and mechanical height measures are difficult to use.

To define a reference point in a secure and reliable way, the vertex IV works with the transponder T3. The vertex IV communicates with the transponder. This communication eliminates in an efficient way. Any mix up of single from other instruments or places (echos).

A measuring operation will not in any significant way be disturbed by objects in between the vertex IV and the transponder T3. The reference point i.e. the T3 is used as a sight mark for height measuring and can be placed at optional height, where visibility is the best In for example thick vegetation. The reference point height is set in a special menu in the vertex instrument and automatically added to the measured height.

The vertex IV uses ultrasound to measure distance. Unlike for example measuring tapes and laser instrument, ultrasound can be used also when there is no free aim to the reference point. The ultrasound will not pass through an obstacle, but looks for the shortest way.

Heights are calculated trigonometrically using the variables contained when measuring angle and distance. The vertex IV automatically assumes that the measuring object is perpendicularly positioned to the ground.

With the vertex IV, an unlimited number of heights or objects can be measured. The instrument display can show the four lastly measured heights per object at a time.

When using a telescopic method to measure, an in built BAF function can be used for the vertex IV instrument to control the minimum diameter for trees. The function is useful when some trees in an area are covered by other, making the decision whether to include the tree or to exclude it from the area difficult.

By simply measuring the distance between the tree and plot centre, the vertex IV can calculate the minimum diameter the tree should have in order to be included into the counting.

Data can be sent through IR or Bluetooth and results can be stored and processed in for example the digitech professional. Calliper, other PC or handheld computer.

Function of the arrow keys

Use the arrow keys primarily to scroll through the menu and to change the settings in the SETUP Menu. By pressing down both arrow keys at the same time, the vertex IV is turned off, automatic turn off time is set to approximately 25 sec. When the vertex IV is turned off the DME position can be activated with left arrow key.

The vertex IV turns into a distance measurer. Right arrow (IR) is used to transmit data through IR or Bluetooth (Vertex IV BT Model).

Data can only be sent after having made a measuring. Note that the Bluetooth function is available only on vertex IV units ordered and prefabricated with Bluetooth.

The Red Cross Aim

The red dot cross hair sight simplifies spotting the target and holding the instrument straight when measuring heights, for best possible accuracy.

For best possible visibility, the light can be adjusted with the left arrow key when aiming.

How to use the T3 Transponder?

To perform any of the operations described below, keep the measuring unit loudspeaker towards the T3 loudspeaker.

Turn on : press measuring unit DME trigger until 2 signal beeps of transponder

Turn off : press measuring unit DME trigger until 4 signal beeps of transponder