Version date: February 13
th
, 2017
Operation 31
5
User instructions
HOAF thermHIT® 75M/100M/125M
Chapter 5 - Operation
5.2.3 Finger pressure test
The working speed is strongly determined by the nature and density of the weeds
and the weather conditions. It is useful to carry out a finger pressure test from
time to time during treatment, and to determine the results.
You take the leaf from a weed between your
thumb and index finger, and apply a light
pressure.
•
If a dark green stain becomes visible, and the area you applied pressure on
feels wet, the plant has been reached effectively, and the working speed has
been chosen correctly. In addition to this, the plant is visibly weaker.
•
If there is no dark green discolouration, the machine was driven too fast.
•
If the weeds are blackened or charred, the machine was driven to slowly.
5.2.4 Influence
of
wind
Be careful if there is a strong wind blowing. Wind may seriously affect the flames.
In that case:
•
Flames may be stifled underneath the burner housing.
Sometimes, the burner must be turned up in order to avoid the flames from
being stifled.
•
The flames underneath the burner housing may be blown out.
In that case, the work must be stopped immediately because this will
endanger the surroundings.
If there is too much wind, stop working with the
HOAF thermHIT® 75M/100M/125M.
Fig. 5-1: Finger pressure test