© 2014 SPX CORPORATION
20
Form No. 1000773
Rev. 0 August 12, 2014
OPERATING INSTRUCTIONS CONTINUED
6. LINEAR DISPLACEMENT SENSORS
Mounting position
• The displacement sensor must be firmly mounted as close as practical to the lift cylin
-
der in a position which allows free cable movement and where damage to the sensor or
cable from foreign objects is unlikely. The sensor will operate in any orientation. Where
string cable
contamination by oil, water or particulate matter is possible, the sensor should be
mounted in the vertical plane with the cable pointing down. Where necessary a sensor
shield should be incorporated in the mounting assembly to protect the sensor from fall
-
ing
solids or liquid media. It is also good practice to mount the sensor onto or close by a
rigid part of the machine or system. Never let the sensor cables snap back into the
sensor. It may damage the sensor. When mounting the position sensor make sure the
linear travel of the cable is at 90 degrees to the sensor body surface.
•
IMPORTANT:
Any deviation from the 90 degree angle will reduce the life of the cable
and cable outlet, and may affect the linear position readout.
•
CAUTION:
As a regular occurrence, moving heavy loads is typically performed
during night time with limited visibility. Make sure that each lifting point and especially
the location of the electrical control unit and pump unit has sufficient lighting. As a
general rule always protect the electrical control unit from environmental influences such
as rain, dust, vibration , heat, the physical damage ,etc.
5. CYLINDERS
•
IMPORTANT:
When placing the cylinders under the load to be lifted, the cylinders
should be placed on a surface that is capable of supporting a minimum of 1.5 times the
rated cylinder capacity without surface deformation. For example, use properly sized
load-distributing steel plates in order to remain below maximum local surface loading
conditions. Failure to do so may result in surface deformation that may lead to an un
-
successful lift, personal injury and damage to the structure being lifted.
• In addition to ground level surface support, make sure that the support point on the load
to be lifted is capable of withstanding and distributing the lifting forces without deforma
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tion to the lift point itself.
• A review of each lift point's estimated load should be performed, so that when selecting
and sizing cylinders for the lift, it is recommended that the load on the cylinder at each
lifting point should not exceed 80% of the rated cylinder capacity.
