6
Mecmesin
Assembly and Installation of –
i
System Test Stands
3.4
Swapping loadcells
You can swap loadcells by simply disconnecting one cell and fitting another. First, return
to the Logon Screen and switch off the stand before unplugging the loadcell. When the
new loadcell has been connected, switch the stand on again, and log on again,. After a
few seconds the new loadcell will be automatically recognised. Emperor will read in the
new cell’s range, serial number and calibration status.
3.5
Attaching grips and fixtures
Grips and other holding fixtures are often paired, with one being attached to the anvil
plate, and the other to the underside of the loadcell. Some fixtures have the QC Quick-
interchange system which allows for very rapid changing of the holding accessory. With
the Quick-interchange system, the grip is attached to a mounting using an 8 mm diameter
pin. The grip can be fitted and removed without the need for additional tools. Be sure to
fit the locking spring to secure the accessory in place.
Attaching a grip with the QC Quick Interchange fittings
Take extra care when fitting or removing heavy grips to the underside of the loadcell.
Support the accessory while the securing device is removed so that it does not fall. Before
fitting a sample, check that both grips and plates are secure.
3.6
Setting the limit stops
Limit stops are provided to prevent damage to the loadcell and grips. A dual safety
system provides protection with the first stage being software controlled, followed, if
necessary, by a second hardware limit that removes power from the motor. Upper and
lower limit stops can be set to restrict movement of the crosshead.
Limit stops should be adjusted after grips or holding accessories have been fitted so that
the limit positions will prevent unwanted contact between moving and static parts.
To set either limit stop, slacken the knurled knob by turning it anti-clockwise, then slide
the stop to the desired position and re-tighten the knob again.
