Operational Manual - DCU

SECTION 2 ASSEMBLY
The apparatus is despatched fully assembled except for
the following:
(a) Adjustable feet (2 oft)
(b) Levelling handwheel and tie rod assembly
(c) Counter assembly
sufficient room to insert a specimen between the
sockets.
To assemble, first lift each end of the apparatus in turn
and screw an adjustable foot upwards into the
appropriate hole in each of the end castings (see Figure I).
Note that the plastic knob should point downwards and
that there is only one adjustable foot at each end of the
apparatus.
Next fit the levelling handwheel between the torque
arm and the lower bracket at the right of the apparatus.
Secure the tie rod ends in position by inserting the
screwed pins. Lock these in place by fitting the two split
pins provided.
Note: For safety reasons, the screwed pins must be
screwed fully in and the split pins must be fitted to
ensure that the joints do not work loose during
operation.
7:
Fit the counter assembly as follows:
1. Remove and retain the two cap head screws located
on the top of the gearbox.
2. Place the counter on the top of the gearbox with the
cam follower lever resting on the carn of the
handwheel.
3. Secure the counter to the gearbox with the two
screws removed in step (1).
How to Set up the Equipment
I. Level the rig on a suitable bench by adjusting the
two adjustable feet.
2. Connect the electrical lead from the output socket
on the right of the apparatus to the input socket at
the rear of the Digital Meter. Connect the meter to a
mains supply and switch on.
3. Select the required drive sockets and fit them to the
input and torque shafts.
4. Loosen the two locking knobs on the gearbox
carriage and move the carriage along the bed such
that, with the shaft fully to the left, there is just
s.
6.
Set the deflection ann approximately level by
adjusting the handwheel, then set the dial gau~;e to
read zero by rotating the outer bezel. Tap the
apparatus lightly and recheck the dial gauge.
Select the desired range on the Digital Nleter
(metric units or imperial). Set the reading to zero by
adjusting the ZERO adjusting knob at the rear of
the meter. Note that the meter is calibrated ~:fore
leaving the factory, but if required the calibration
can be checked using the procedure given in
Section 4.
If required, fit the Torsiometer to the specunen.
Insert the specimen into one of the sockets, then
rotate the handwheel until the second socket will
slide freely onto the other end of the specimen.
8. Take up any free movement by slowly rotatin!~ the
handwheel clockwise until the Digital Meter
reading just changes (i.e. a reading of 0.1 Nm or
1.0 lb. in). Turning the handwheel clockwise ~~ives
forward loading of the specimen, and anticlockwise
gives reverse loading.
9. Loosen the grubscrew on the scale, and positi,:>n it
in line with the cursor. Set the reading to zero and
lock the scale in position. Zero the counter by
turning the knob at the far end of the counter.
10. All zeros are now set and testing can commenc