22 Atwell International Limited
These parameters are variable and should they require changing, please contact
Atwell International for details.
Site Testing of Uncontrolled Movement
Test 1 - Slow speed creep away from the landing entrance.
1. Check local operating conditions and guard the lift entrance in
accordance with local requirements.
2. The lift should be parked at a landing floor with both the landing and car
doors open.
3. Ensure the VG UMD-SRB02 control box is monitoring the lift doors (Red).
4. Description of levelling & re-leveling 0.8m/sec 0.30m/sec
5. Fix the hand winding wheel to the machine and slowly hand wind the
lift until the rope brake is triggered and the drop jaw has engaged the
ropes.
6. Measure the height between the car floor and the landing floor. This
should be a maximum of 150mm.
Test 2 - Sudden loss of traction.
1. Check local operating conditions and guard the lift entrance in
accordance with local requirements.
2. The lift should be parked at a landing floor with both the landing and car
doors open.
3. Ensure the VG UMD-SRB02 control box is monitoring the lift doors (Red).
4. Lift the machine parking brake and allow the lift to run away
uncontrolled until the rope brake is triggered and the drop jaw has
engaged the ropes or for the safety gear on the rails.
5. Measure the height between the car floor and the landing floor.
This should be 150mm plus the slide distance (check the specific lift
calculations). This combined total should be no more than 900mm as
stated in EN81-20:2020.
Uncontrolled Movement
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