When calculating it is important that the angles are set into the equations with the correct signs in
relation to the horizontal plane, see
Figure 12. Inclined Mounting page 17
.
F
R
Tare
Tare
F
V
F
V
F
R
T
T
T
T
+β
+α
-α
Horizontal plane
-γ
-β
+γ
Figure 12. Inclined Mounting
2.6
The Electrical Circuit
The electrical circuit of the load cell is shown in the diagram below.
(signal)
Secondary
circuit
Primary
circuit
C
D
A
B
T
0.5 A/330 Hz
R
1
R
2
Secondary circuit
(signal)
(supply current)
Figure 13. Load cell circuit diagram
The load cell is supplied with a 0.5 A, 330 Hz alternating current. The secondary signal is calibrated
for the correct sensitivity with a voltage divider R
1
- R
2
, and temperature compensation is provided
by thermistors T.
All resistances on the secondary side are relatively low. The output impedance is typically 1-3 Ω ,
which helps to suppress interference.
Pressductor PillowBlock Load Cells, Horizontal Measuring PFTL 101, User Manual
2 Description
3BSE009965R0401 en Rev E
17
Summary of Contents for PFTL 101
Page 41: ......
