TeST TT AUT-MARSHALL-CBR, Руководство пользователя

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5.1 Refer to the relevant standard for full details of the CBR test procedure.
5.2 A typical set up for carrying out a CBR penetration test is shown in figure 3.
5.3 The correct location of the CBR mould is achieved by interposing the platen adaptor
(supplied with the Multiplex 50) between the machine platen and the mould.
5.4 It is suggested that the test should be started with the platen set approximately 10
mm up from its lowest position.
5.5 Position the crosshead at the height required by firstly slackening the nuts on either
side of the crosshead and then adjust the crosshead to the required height by using
the adjustment nuts below the crosshead. To ensure that the crosshead is level, the
alignment studs on the lower nuts should be located centrally and at the front of the
machine. Tighten the locking nuts using a spanner.
5.6 To ensure stability and central location of the penetration piston, the stabilising bar
must always be used. When using the maximum number of surcharge weights, it may
be necessary to clamp the stabilising bar to the threaded part of the columns. In this
case it is recommended that packing pieces (i.e. aluminium strips) be placed between
the stabilising bar clamp screws and the column threads.
5.7 With all the equipment correctly located and secured in the machine, press the UP
key to close most of the daylight. See 4.6
5.8 Set the speed according to the standard specified. Press the RUN key to commence
the test.
5.9 At the completion of the test, press the STOP key.
5.10 Press the DOWN key to return the platen to its lowest position or until the STOP key
has been pressed when the platen has descended the required distance.
Original Instructions 11