Flintec 52-28 - Manual (Page 4)

52-28 Application Guidlines, Rev. 1.00 September 2012 Page 4 of 8
3. Lift Off Protection and Jacking Device
Fig. 2: Lift off protection and jacking device
Max. lift off force: 5 kN (510 kg). The gap of is preset.
The jacking device simplifies future maintenance.
Max. jacking force: 5 kN (510 kg)
Important: Both nuts of the jacking device are used as a
transport lock. After the installation and prior to the
commissioning these nuts have to be unlocked.
4. Overload Protection
Fig. 3: Overload protection
Each weigh module is equipped with a preset overload
protection, which protects the load cell in case of an
overload.
The overload stop is simply the head of a hex head
screw, which stops the down movement of the
loading end of the cell. Thanks to the relatively large
deflection of SB8 respective SB6, the gap x between
the cell and the screw head is easy to set. The table
below shows the recommended gaps which are
selected to be ca 30 – 40 % more than the deflection of
the cell at nominal load. The actual gap
can be measured by using a feeler gauge. If the load
cell is to be utilized to less than nominal load, the gap
can preferably be reduced in proportion. With overload
stop fitted, the cell will be protected to at least 5 times
nominal load.
Load cell Max capacity Deflection [mm] Gap x [mm]
SB8 10kg 0.29 0.35
20kg 0.30 0.35
50kg 0.23 0.30
100kg 0.30 0.40
200kg 0.38 0.45
250kg 0.87 1.00
500kg 1.25 1.50
SB6 20kg 0.21 0.25
50kg 0.30 0.40
1kN (102 kg) 0.26 0.35
2kN (204 kg) 0.36 0.45
Table 1: Gap settings for the overload protection
Gap x