Trotec PD200 Operating Manual page 9

Using the gravel claw (optional accessories)
Warning
Always ensure sufficient protection for all work on the
(flat) roof! Particularly in close proximity to the roof
edge there is the ever-present risk of falling!
The gravel claw serves the purpose of simplified laying and
inserting of loop wiring under the gravel fill.
1. Screw the gravel claw (27) to the bottom part of the
measuring rod (25), which is not intended for unwinding
the loop wiring.
2. Push the loop wiring reel (4) onto the handle of the other
measuring rod (26), which serves as unwinding aid, and
secure the spindle by means of the corresponding
clamping spring.
3. Unwind some of the loop wiring (approx. 1 m).
4. Attach the loop wiring to a fixed position on the roof in a
way that it cannot shift, e.g. by weighting it down with an
object.
5. Now tighten the wire and thread it into the eye of the
gravel claw. Hold the spindle and gravel claw as
illustrated.
6. Carefully insert the claw in the gravel by pulling and move
backwards one step at a time, so that the loop wiring
disappears underneath the gravel fill.
7. On a sample basis check that the loop is placed directly on
the roof membrane.
EN
Connecting the pulse generator
ü The device is switched off.
ü The pressure switch (16) for external earthing is actuated.
1. Connect the pulse generator to the mains.
2. Connect the black connection cable (3) to the loop wiring
by use of the clip terminal. The red positive socket and the
red connection cable are not being used here. Earthing is
effected via the earthing contact of the mains plug.
Connecting the pulse receiver
Both measuring rods are screwed together and connected to the
pulse receiver by use of the black (8) and red (9) connecting
cables.
4
26
25
27
pulse current measuring system PD200
10 0 10
20 20
30 30
40 40
50 50
– +
µA
8
9
9