2017.06.19 FwdMan2.8.17.docx 11-85
A load cell with a central bore is placed immediately above the loading plate for direct
measurement of the loading force (stress).
A raise/lower bar is furnished which automatically raises or lowers the row of deflectors
present concurrently with the raising or lowering of the drop weight subassembly.
A suitable hole is provided in the centre of the loading plate such that the centre deflection
may also be measured. A transducer holder is provided for each of the seven (optionally nine)
deflectors, i.e. one above the hole at the centre of the load cell (with a measuring rod passing
through the cell and the loading plate centre hole), and six (optionally up to fourteen)
additional holders which can be positioned anywhere along the raise/lower bar. All deflector
holders are spring loaded ensuring good contact between the deflector (via a free rod beneath
their centre) and the surface being tested. The raise/lower bar stretches from the edge of the
loading plate to a distance of at least 2.45m (8 ft.) from the loading centre.
All transducers (i.e. the load cell and the deflectors) are connected to sockets at the
Compact15 Front Panel on the trailer. The panel also carries four pushbuttons and six LEDs
for manual control/check of the FWD trailer operation (only intended for use in case of
servicing or emergency).
Only two cables connect the FWD trailer to the electronics in the car:
- One Ethernet cable connects the Compact15 System Controller to the Remote Control
Box.
- One “Trailer Power Cable” connects the 12V system of the FWD trailer to the alternator
in the towing vehicle (or to an optional, trailer mounted Power Unit).
All exposed items are weather-proof, so the FWD trailer may be operated in all kinds of
weather within the temperature ranges specified in the following table. For operation below
0°C (32°F), lower viscosity hyd. oil may be necessary. Please consult Dynatest.
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