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TrackDrive (TD) Series
Operating & Safety Instructions
4.5
CAGE WEIGH SYSTEM
4.5.1
LOAD CELL VERSION
The Niftylift TD150T is fitted with an electronic load cell. This load cell is a moment-independent,
redundant design. This means that independent of the load position inside the cage of the machine, the
actual load is measured and if pre-configured limit values are exceeded, warnings will be activated.
"Redundant design" means that the load cell design incorporates dual channels that monitor each
other. The design of the unit meets the requirements of both EN280 and EN954-1 class III.
4.5.2
CALIBRATION & INSPECTION
Calibration, maintenance and repair of the Niftylift TD150T cage load cell requires specialist knowledge
and equipment. For this reason, no part of the Niftylift TD150T cage-weigh system can be adjusted,
repaired or inspected by the operator. All enquiries relating to calibration, inspection or maintenance
should be directed to Niftylift or one of their approved dealers.
4.5.3
TESTING
At the simplest level, before working on the platform, the function of the cage overload can be checked
by the following method: - Place two men into the cage and a larger quantity of tools than is permitted
to be carried. (Typically 40 kg). The alarm should sound and all functions should be lost. Reducing
the cage contents to the safe working load should silence the alarm and restore the machine operation.
4.5.6
MAINTENANCE
If the assembly is subjected to any external impact force, typically whilst manoeuvring the machine
under power, or in the case of trailer units, whilst being reversed into position, the cage assembly will
require close inspection. If there is evidence of any deformation in any part of the structure, then the
advice of a Niftylift Service technician should be sought. Physical damage to the assembly is liable to
render the cage weigh system inactive, or to affect the accuracy of the result. Under no circumstance
permit a damaged machine to enter service without performing a thorough inspection and calibration of
the weigh assembly.
For this reason it is not recommended to restrain the machine in transit using strap or chains passed
through or over the cage itself. This is particularly true of the electronic load cell system, which could
be permanently damaged by the application of such excessive external forces. Whilst the mechanical
system could be considered to be more robust in operation, the same restraint forces that could be
generated through ratchet straps and the like, is likely to cause some severe deformation in the
lightweight cage structure. Use only the designated tie-down points on your Niftylift when strapping
the machine down for transport. Failure to observe this instruction could render the machine un-
usable, and a considerable repair bill for the damaged components.
32
English/USA 12/09
Courtesy of Crane.Market
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