RD5100H
2
O+ Operation Manual
© 2018 Radiodetection Ltd
31
indicate a clear Peak response directly over the sonde.
Locator sensitivity is now set for tracing the duct or drain
unless the distance between sonde and locator changes.
Propel the sonde three paces along the drain or duct and
stop. Place the locator over the supposed position of the
sonde. Do not adjust the sensitivity level.
Figure 8.4 Sonde deployment
To locate a sonde:
1 Move the locator backwards and forwards and stop
when the bar graph indicates a Peak. You can use
the LCD compass to orient the blade of the locator
with the direction of the sonde.
2 Rotate the locator as if the blade is a pivot. Stop
when the bar graph indicates a Peak.
Figure 8.5 - Locating a sonde
3 Move the locator from side to side until the bar graph
indicates a Peak.
4 Repeat 1, 2 and 3 with the locator vertical and resting
on or just above the ground. The locator should then
be directly above the sonde with the locator in line
with it. Mark the position of the sonde and its
direction.
5 Propel the sonde a further 1 or 2m, pinpoint, and
mark the position. Repeat this pinpoint procedure at
similar intervals along the line of the drain or duct
until the survey is completed.
Checking sonde depth
The RD5100H
2
O+ locator will automatically display the
depth of a located sonde providing the locator is correctly
oriented and positioned above the sonde. Using the LCD
compass as a guide, rotate the locator until the compass
indicates the sonde is in East / West position.
Figure 8.6 - Calculating sonde depth
Calculation method
Pinpoint the sonde. Move the locator in front of the sonde
and still with the locator in line with it, increase sensitivity
to find the Peak of the ghost signal. Move the locator to
behind the sonde ensuring that the locator blade is
always in line with the sonde. Find the null positions A
and B (See Figure 8.5). Measure the distance between
them and multiply by 0.7 to give an approximate depth
measurement.
FlexiTrace
The FlexiTrace is a traceable plastic covered fiberglass
rod incorporating wire conductors and is used for locating
small diameter, non-metallic pipes to a depth of
3m (10ft). The FlexiTrace can be inserted into a pipe or
duct as small as 9mm (3/8
”) internal diameter, and with a
minimum bend radius of 250mm. Batteries are not
required, as the FlexiTrace is powered by any
Radiodetection transmitter.
The FlexiTrace has a maximum power rating of 1W.
When using the FlexiTrace with the RD5100H
2
O+Tx
transmitter, the output limit must be set to 1W in the MAX
P menu and the output voltage limit set to LOW in the
MAX V menu.
WARNING: Failure to follow the RD5100H
2
O+Tx
instructions above may result in the tip of the FlexiTrace