Tractel Group Dynasafe HF 32 Operating instructions

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dynasafe®
HF 32 universal load cell
I( It Iequipment in
~ accordance with
CE directives
0420001103 - 03/96
®
o
•
operating
and
maintenance
manual
racI8~®

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CONTENTS
GENERAL WARNING 2
INSTALLATION OF HF32 LOAD CELL 3-4-5
OPERATION AND AJUSTMENT OF
HF32 LOAD CELL 6 •
GENERAL WARNING
1 - Reading and fully understanding the technical data sheets relating to this
equipment is essential forthe best use of this high technological material
that you have received. All the technical data sheets are available on
request.
2-
Before installing and operating Dynasafe® equipment it is essential forthe
safe and correct operation of the material that this manual be read and
fully understood and that all the instructions be followed. This manual
should be made available to every operator. Extra copies of this manual
will be supplied on request.
3 - The
installation and operation of Dynasafe® equipment should only be
carried
out in accordance with the appropriate health and safety at work
regulations.
4 - Never apply to the Dynasafe® a load or an effort in excess of the working
load limit, and never use it for an operation for which it is not intended.
5 - TRACTEL SA declines any responsibility for the consequences of
dismantling or altering the machine by any unauthorized person.
6 - Dynasafe®
equipment must not be used in explosive atmospheres.
7 - Dynasafe® equipment must only be used in a system designed for lifting
people after ensuring that the appropriate operating coefficients have be
used in
accordance with the current regulations.
8 - Priorto the use of Dynasafe®equipment with complementary equipment
relaying the signals to an operating system, the user or installer of this
system should carry out a specific risk analysis of the operating functions.
The appropriate measures should be taken to obviate the risks identified.
® ®

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INSTALLATION OF HF 32 LOAD CELL
M----jfzi_.J:::::I!:::::::::;:--A
Fig. 1
K -------.......A=~T1
J --';1:::~J..j
H __ ...J
Components of the load cell
A - 2 m connecting cable F - Locking nut
G -Tare
screw
H - Traction part
B -Flat washer
C - Adjusting pin
D -Locking ring I - Safety
washer
E - Load cell body J - Tightening screw
Procedure for installing load cell
B
C
D
E
K - Tightening bracket
L -Rubber compression pad
M -Wire rope
N -Fixing screws for
circuit-
breaker (Do not touch)
Essential condition: The hook of the lifting system should be free of any load.
-Position the adjusting pin as a function of
the load range and wire rope disameter
(see page 4 and 5).
-Remove the tightening bracket (K).
-Position the load cell on the wire rope near the dead end/fixed point. The connecting cable
should be uppermost.
-Replace the tightening bracket (K) ensuring that it is correctly positioned depending on the
diameter
of the wire rope. (See page 4 and 5).
-Adjust the tightening screws (J) symetrically (+/- 0.5 kgm) to ensure that there is no risk of
movingthe load cell outoflinewiththewire rope. Excessivetightening may breakthe bracket.
-Operate the lifting system up to the upper limitswitch and ensure thatthe sheaving or bottom
block does notfoul the load cell. (Ifthis happens adjust the upper limit switch so that there is
an appropriate distance between the load cell andthe bottom block. Also checkthatwhen the
bottom block is in the upper position the load cell is not in contact with the overhead crane.
-Wire the connecting cable from the load cell to the control box. Ensure that the cable is
secured.
® ®
3

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INSTALLATION OF HF 32/1 LOAD CELL
Positioning the adjusting pin as a function of the effort in the wire rope
•
Fig. 2
For wire rope from 5
mm to 8 mm diameter and
for
loads ranging from 350 kg to 950 kg.
Forwire rope from 9 mm to 13 mm diameter and
'---- for loads from 450 kg to 2000 kg.
L.- ___ Forwireropefrom 14 mmto 16 mm diameterand
for loads from 650
kg to 2800 kg.
Correct positioning of the tightening bracket depending on the diameter of the wire rope.
5
mm to 8 mm wire rope
withoutthe
rubber compression pad,
M6 screws X 25 mm (supplied)
Fig. 3
M6 screw x 25 mm
(X2)
®
9 mm to 16 mm wire rope
with the rubber compression pad,
M6 screws X 30
mm (supplied)
Rubber compression pad
M6 screws X 30 mm (supplied)
(X 2)
®

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INSTALLATION OF HF 32/2 LOAD CELL
Positioning the adjusting pin as a function of the effort in the wire rope
Fig. 2
For wire rope 17 mm diameter and for loads
ranging from 300 kg to 2500 kg
without the rubber compression pad .
For wire rope from 18 mm to 22 mm diameter
and for loads ranging from 500 kg to 4000 kg
with the rubber compression pad.
For wire rope from
23 mm to 26 mm and for
loads ranging from 800 kg to 6000 kg with the
rubber compression pad.
Correct positioning of the tightening bracket depending on the diameter of the wire rope.
17
mm wire rope
withoutthe
rubber compression pad,
M8 screws X 40
mm (supplied)
Fig. 3
®
18 mm to 26 mm wire rope
with the rubber compression pad,
M8 screws X 50
mm (supplied)
Rubber compression pad
M8 screws X 50 mm (supplied)
(X 2)
®
5

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OPERATION AND ADJUSTMENT OF HF32 LOAD CELli
•
Connection layout (brown)
(blue) (black)
lifting
contactor
G
/.rown/blue =NF (Normally closed)
brown/black =NO (Normally open)
alarm control
voltage
The switching poweris 4 A,220 Vac (0.3A, 250 Vdc). (It is therefore possible to connect in series
in the upper limit switch circuit.)
Adjustment of the safety trip point
Essential conditions: -The load cell must be correctly installed and wired.
-The hook ofthe lifting system should be free of any load.
Equipment required: - A load ("Pm") equivalentto 100% ofthe working load limit of the lifting
system.
-An additional load equivalent to
10% of "Pm".
ACTION EXPLANATION
1 Lift the two loads (100%
+ 10% of "Pm") The additional 10 % load represents the overload value permitted
under the European directives.
2
by +/- 10 cm
To adjust the safety
trip
point.
®
Ifan overloadsituation is detectedin thewire rope (withoutliftingthe
loads) the preadjustment ofthe load cell in thefactory istoo low for
your lifting system.
Solution: release the tightening screw (G -see FigA) one turn at a
time and restart at the beginning of point
1.
Use the tightening screw (G).
Warning: incorrect adjustment may damage the circuit-breaker.
Do notforgetto tighten the locking nut (F). The switch is a normally
closed contact(NC),requiring the opening ofthe switch to setoffan
overload condition.
Turn clockwise
to reduce the value ofthe trip point.
Turn anticlockwise to increase the value of the trip point.
®