Troglotech T804 User Manual SD VERSION Page 8
Making accurate measurements
. As
the Rod Counter relies on the rotation of
the coiler it is important that the coiler
brake is set correctly. When letting Rod
out from the T804, the coiler may not
rotate freely if the brake is set too
fiercely. Ensure that the brake is set so
that the coiler allows rod to be removed
smoothly but does not allow the coiler to
free wheel. Layering the rod neatly on
the coiler increases the accuracy and is
always good practice.
Measurements will not be accurate if
the calibration routine is performed
when the camera termination is not
next to the Rod Guide. This does not
have to be critically accurate; a leeway
of a few inches is acceptable.
USING THE ROD COUNTER
The Rod Counter can be operated in
Imperial (feet and 10ths of feet) or Met-
ric mode (Metres and 10ths of Metres).
To switch between the two modes
press the ‘C’ key when the Textwriter is
in VIEW mode, the display will change
from (‘) - Imperial to (m) Metric.
If a relative measurement needs to be
made between two points during a sur-
vey, press the Rod Counter. The Rod
Counter will now count up or down from
the point where the button was pressed
to give a relative measurement.
Version 4 software automatically cali-
brates the counter and allows the
counter to count in reverse if the T804
is switched ON when the rod is already
extended - previous versions will not
count in reverse in this situation