3B SCIENTIFIC PHYSICS 1012850 Manual De Instrucciones página 6

Dynamic force sensor set-up
The sensors are optimally designed to be mounted on
stands assembled from the SW stand equipment set
(1012849). (See instructions for pendulums listed
below.)
In addition, they can be mounted on plates or on
any rods of 10-mm diameter by means of their
knurled screw.
Caution: Dynamic force sensors must not be
subjected to mechanical overloading
• Neither sensor hook may be loaded with
more than 5N in the axial direction and 1 N
in transverse direction.
• Be especially careful with the maximum
loading force when assembling the system
or suspending loops or springs from the
hook.
2.2 MEC electronics board
1a
f
1b
Fig. 1 MEC electronics board
1a Connector for plug-in mains supply
1b A and B inputs for dynamic
1c A and B outputs for dynamic
1d Δφ output for phase detector
AB
Amplifier channels
Amplifier channels A and B on the MEC elec-
tronics board are used in conjunction with the
dynamic force sensors. The board converts the
signals from both sensors to make them suitable
for display in an oscilloscope or other display
instrument. The two channels have high internal
12V AC
M
A
B
C
Δϕ
AB
force sensors
force sensors
resistance. In addition, the phase difference
between the two signals can also be evaluated
and output. The other inputs on the board are
not used for this purpose.
Phase detector
A phase detector compares the waveforms for
channels A and B in the time domain to deter-
mine the difference in phase between them.
Output Δφ
AB
ence Δφ in the form of a DC voltage between
AB
8 V (∆φ = 0°) and +8 V (∆φ = 180°).
2 Dynamic force sensors
2 HF cables
1 MEC electronics board
1 Plug-in power supply, 12 V AC
Dynamic force sensor
Maximum force
Axial plane:
Radial plane:
Lower frequency limit: 0.2 Hz
Connector:
1c
Length of cable
Dimensions:
Weight:
Electronic board
Power supplied via plug-in mains transformer
Input sockets:
1d
Output sockets:
Amplifier A, B:
Phase detector (XOR): Output ±8 V,
Dimensions:
Plug-in power supply for 1012850
Primary side:
Secondary side:
Plug-in power supply for 1012851
Primary side:
Secondary side:
Only power the MEC electronics board from the
supplied 12 V AC mains transformer.
2
supplies the actual phase differ-
3. Contents
4. Technical data
5 N
1 N
3.5-mm jack plug
0.8 m
52 x 37 x 26 mm approx.
80 g approx.
3.5-mm jack sockets
BNC
Output ±8 V,
Ri = 100 MΩ
Ra = 1 kΩ
Ra = 1 kΩ
65 x 100 x 40 mm approx.
230 V, 50/60 Hz
12 V AC; 700 mA
115 V, 50/60 Hz
12 V AC; 500 mA