20
Z7A/...
HBM
A1847-1.1 de/en/fr
2
Load introduction
Loads should be introduced as closely as possible in the direction of measu-
rement. Torsional moments, off-center loads and transverse or lateral forces
cause measurement errors and may damage the load cell. These adverse in-
fluences must be avoided, e.g. by using stay rods or guide rolls. These ele-
ments must not absorb any load or force components in the direction of mea-
surement.
HBM offers different load-introduction components suiting various mounting
situations in order to minimize the adverse effects due to load introduction:
•
ZEL Rubber-metal bearing
•
ZPL Pendulum bearing
•
EPO3R Thrust piece
•
ZL Load button insert
•
ZK Spherical cap
3
Connection
Load cells with a strain gage measuring system can be connected to:
•
carrier-frequency measuring amplifiers, or
•
DC measuring amplifiers suitable for strain gage measuring systems.
The load cells are connected using the six-wire circuit. The wiring assignment
is shown in the following diagram.
(white)
(black)
(grey)
Excitation (+)
(green)
(red)
(Wire strand)
Excitation (
−
)
Sense (
−
)
Signal (+)
(blue)
Sense (+)
Signal (
−
)
Shield,
connected to housing