Testing - Tru-Test HD Serie Manual De Usuario

Installing the load bars
1 Position the crate on the level concrete slab where it is to be installed.
2 Lift and support the crate so that the load bars can be positioned underneath. Align the holes of the crate
and load bar mounting plates and fix with a minimum of two 12 mm threaded bolts at each load bar end.
(For HD800/HD850 load bars, use one bolt per end.)
Caution! Dropping the crate with load bars fitted, or dropping the crate onto the load bars can damage the load
bars.
3 Lower the crate onto the concrete slab, ensuring the load bar foot pads are not twisted or binding in any
way.
4 Using the load bar foot pad as a drilling template, drill 12 mm (½") diameter holes in the concrete and fix
the load bars to the slab with a minimum of two 12 mm (½") masonry anchors (e.g. Dynabolts).
5 Install the masonry anchors one at a time, using the clamping action of each anchor to restrain the foot pad
for subsequent drilling. Care should be taken to ensure that the anchors do not force the foot pads sideways,
and thereby cause misalignment of the ball and cup loading system.
6 Once fixed to the slab, the bars must be 'unlocked' from the foot pads. This involves unscrewing the two
12 mm thread bolts holding the bars to the foot pads, and removing the plastic sleeve, see picture on
previous page.
7 Loosen the 19 mm AF locknut which locks the 12 mm threaded bolt to the foot pad.
8 Unscrew the 12 mm threaded bolt from the foot pad and locknut and totally remove.
9 Remove the plastic sleeve fitted over the 12 mm threaded bolts in the mounting hole of the load bar.
NEVER remove the rubber tube in the centre of the load bar. This contains the load centring cup assembly.
10 Replace the 12 mm threaded bolt, washer, and locknut in the reverse order to the above disassembly.
11 Tighten the locknut down to the foot pad allowing 1.0 to 1.5 mm (0.040 to 0.060") clearance between the
underside of the head of the 12 mm threaded bolt and the washer. Ensure that there is horizontal clearance
between the shank of the load bar stop bolt and the load bar bottom plate.
12 Carry out the above procedure for all four feet of the load bar system.

Testing

Once the load bar assembly is installed, the installation should be tested.
1 Connect the load bars to the indicator.
2 Turn on and zero the indicator.
3 Put a test weight (which may be yourself or another person) at one end of the platform/crate and note the
stable reading on the indicator.
4 Put the test weight at the other end of the platform or crate and note the stable reading on the indicator.
5 Remove the test weight and note whether the reading returns to zero.
6 If the two readings differ by more than 1 kg, OR the reading does not return to zero, see Troubleshooting on
page 6.
7 Periodically repeat the above tests during use and also before first use if the equipment has not been used for
some time.
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