9
GB
4.5.3 Adjustment of a safety threshold and an
intermediate threshold
This configuration satisfies a number of applications
suchas,forexample,fastliftingspeedconditionedto
loadlifted.Audibleorvisualsignaltriggeredat90%of
theWLL.etc.
Preliminaryconditions:
– Loadlimitercorrectlymountedandwired.
– Adjustmentscrewsunscrewedtothemaximum.
– Hookfreeofanyload.
Equipmentrequired:
– A load (called «WLL») equivalent to 100 % of
the nominal capacity authorized for the lifting
machine.
– An additional load equivalent to 10 % of the
«WLL».
– A load «X» equivalent to the value of the
intermediatethreshold.
ACTIONS
REMARKS
1
Liftthetwoloads
(100%+10%WLL)
byabout10cm.
Theadditional10%represents
the overshoot value authorized
in
accordance
with
the
Europeandirectives.
2
Adjust
thesafetythreshold
S1.
Graduallyscrewinthethreshold
adjustment screws (§ 4.1, rep.
6) until the NC contact opens
(see§4.3.b).
Useanohmmeter,forexample,
tocheckthestateofthecontact.
3
Check
correctoperation.
It must be possible to lift the
«WLL»load.
It must be possible to lift the
«WLL»load+10%.
Depending on the lifting
speed, the dynamic effect
may produce an unintentional
overload. In thiscase, consult
with a technician capable of
integrating a signal filtering
device(example:time-out,etc.).
4
Lift
theintermediate
load“X”.
Wait for the load to stabilize
beforeadjustingthethreshold.
5
Lift
theintermadiate
loadS2.
Graduallyscrewinthethreshold
adjustment screws (§ 4.1,
rep. 7) until the NC contact
opens(see§4.3.b).
Useanohmmeter,forexample,
tocheckthestateofthecontact.
6
Check
correctoperation.
Check that micro switch S2
opens when the load “X” is
lifted.
4.5.4 Adjustment of a safety threshold and a "Wire
rope slack"threshold
This configuration is particularly designed to detect a
“Wireropeslack”situationor“presenceofaminimum
load” below which the signal generated by the micro
switchwillbeprocessed,forexample,tostopthedown
movementoftheliftinghook.
Preliminaryconditions:
– Loadlimitercorrectlymountedandwired.
– Adjustmentscrewsunscrewedtothemaximum.
– Hookfreeofanyload.
Equipmentrequired:
– A load (called “WLL”) equivalent to 100 % of
the nominal capacity authorized for the lifting
machine.
– An additional load equivalent to 10 % of the
“WLL”.
– A load “X” equivalent to the value of the “Wire
ropeslack”threshold.
ACTIONS
REMARKS
1
Liftthetwoloads
(100%+10%WLL)
byabout10cm.
Theadditional10%represents
the overshoot value authorized
in
accordance
with
the
Europeandirectives.
2
Adjust
thesafetythreshold
S1.
Graduallyscrewinthethreshold
adjustment screws (§ 4.1,
rep. 6) until the NC contact
opens(see§4.3.b).
Useanohmmeter,forexample,
tocheckthestateofthecontact.
3
Check
correctoperation.
It must be possible to lift the
“WLL”load.
It must be possible to lift the
“WLL”load+10%.
Dependingontheliftingspeed,
thedynamiceffectmayproduce
anunintentionaloverload.Inthis
case,consultwithatechnician
capable of integrating a signal
filtering
device
(example:
time-out,etc.).
4
Lift
theintermediate
load“X”.
Wait for the load to stabilize
beforeadjustingthethreshold.
5
Lift
theintermadiate
loadS2.
Graduallyscrewinthethreshold
adjustment screws (§ 4.1, rep.
7) until the NC contact opens
(see§4.3.b).
Useanohmmeter,forexample,
tocheckthestateofthecontact.
6
Check
correctoperation.
Check that the micro switch
forthresholdS2tripswhenthe
“Wire rope slack” condition is
reached.
