NIFTYLIFT HR21 4x4, Operating/Safety Instructions Manual

Page: 65 / 79

Height Rider/SP Series
Operating & Safety Instructions
English/USA – 07/17
Original instructions
63
5. Response time;
The Load sensing system is active all the time the green button or footswitch is depressed, the
application of an overload will be detected within 4 seconds to cater for transient loads and
acceleration forces. The alarm and visual indication will continue to sound as long as the machine is
overloaded and the command signal is being applied. Removal of the overload by reduction of the
applied load will take the cage weigh below the threshold for activation as there is 95% hysteresis in
the system. Once restored the load system will function as before and no re-calibration will be
necessary.
6. Operating limits (including environmental conditions);
All components within the load sensing system are rated to the environmental conditions acceptable
for the machine; see Section 2.2.
7. Indications and alarms;
The action of the cage overload detection will cause the klaxon to sound and will be indicated by the
red warning light on the base and cage location, only as long as the green button or footswitch is
continued to be depressed.
8. Muting and suspension of safety functions;
In the case of the overload being detected the alarm can be silenced by releasing the green button or
footswitch. Suspension of the function will continue until the overload has been safely removed.
9. Control modes;
The load sensing system has no user controllable modes of operation, other than by use of the
calibration tool.
10. Maintenance; Maintenance check lists;
Normal maintenance

Visual check of connection wires.

Check of power supply to verify it is correct.

Check of the equipment correct operation, by simulating an overload condition and correspondent
re-setting. See “Means for easy and safe trouble shooting”
The load sensor will not normally require special maintenance
Should special maintenance be require please observe the following precautions.

Cut off power supply before every check or replacement.
 Do not weld on machine structure before removing power supply (positive and negative) and
detaching boxes from vehicle frame or possible connections towards vehicle frame.

Provide suitable mechanical protections for connection wires, paying particular attention for
transducers.

Do not place board, transducers or cabling close to sources of heat, electromagnetic interferences
or power transmissions.

Do not touch directly boards, transducers and boxes with flushing or degreaser fluids under
pressure.
 Do not hole the board box.

Seal the box and/or the panel who contains the electronic board, to reveal any not authorized
access or tampering.