3B SCIENTIFIC PHYSICS FG100 User manual

3B SCIENTIFIC®PHYSICS
1
Function Generator FG100
1009956 (115 V, 50/60 Hz)
1009957 (230 V, 50/60 Hz)
Instruction Sheet
10/15 SD/ALF
1 Display
2 Offset button and Start/Stop
button for sweep function
3 BNC socket, input/output for
trigger
4 Button for setting waveform
5 Input for control voltage/out-
put for ramp
6 Button for selecting sweep
mode
7 Output sockets
8 Amplitude knob
9 Power socket for plug-in
power supply
10 Frequency knob
1. Safety instructions
The function generator FG100 conforms to safety
regulations for electrical measuring, control and la-
boratory equipment as specified in DIN EN 61010
Part 1. It is to be operated in dry rooms as appropri-
ate for the use of electrical equipment.
Safe operation of this equipment is guaranteed as
long as it is used as stipulated. However, there is no
guarantee of safety if the equipment is used incor-
rectly or carelessly.
If there is any suspicion that the equipment can no
longer be operated without risk (e.g. if visible dam-
age is detected), the equipment must immediately
be withdrawn from use and secured in such a way
as to prevent its inadvertent operation.
Only use the instrument in a dry environment.
Do not attempt to operate the equipment except
with its own power supply.
Donotapplyanyexternalvoltage totheoutputtermi-
nals.
Do not exceed the maximum input voltage of 5 V
for the control voltage and trigger.
Electromagnetic waves can be generated, in partic-
ular at high frequencies or with waveforms featuring
a large amount of harmonics, which may cause in-
terference to other equipment in the area.
Ensure that no other equipment is being interfered
with.
If necessary, only operate the FG100 function
generator for short periods.
Do not use experiment leads longer than 5 m.

2
The FG100 function generator features an external
sweep function with a power amplifier for use in stu-
dent and practical experiments on simple harmonic
oscillation, alternating current and induction.
The equipment outputs sine-wave, triangular wave
and square wave voltages with adjustable amplitude
and frequency. The built-in power amplifier allows it
to handle currents of up to 1 A.
Operating modes for sweep mode:
External mode: the sweep is proportional to the set fre-
quencies and depends directly on an external control
voltageofbetween0 and 5V.Thisallowsforfrequency
modulation using modulation frequencies of up to 200
Hz.
Internal/Continuous: At the start and whenever the
voltage passes through zero a 5-V pulse is output
from the TRIG OUT socket. A voltage of 0 - 5 V di-
rectly proportional to the sweep voltage is output
from the Control Voltage socket.
Internal/Single: At the start a 5-V pulse is output from
the TRIG OUT socket. The sweep can also be initi-
ated by a 5-V pulse to the TRIG IN socket. A voltage
of 0 - 5 V directly proportional to the sweep voltage
is output from the Control Voltage socket. The sweep
stops after one run-through and continues at the
starting frequency until another start pulse is input
(using the buttons or the trigger).
The most recently used sweep-mode settings will be
stored in the function generator for the next time it is
switched on.
The output is protected against shorts circuits, induc-
tive voltages and spark discharges.
The device is equipped with fold-away feet.
Power is provided via a 12-V AC plug-in power sup-
ply.
The FG100 function generator with order number
1009956 is intended for a mains voltage of 115 V
(±10%), whereas the one numbered 1009957 is for
230 V (±10%).
3. Technical data
Signals:
Frequency range: 0.001 Hz to 100 kHz
Distortion factor: <1 %
Signal forms: Sine, square, triangular
Offset: 0 to ±5 V, adjustable in 0.1
V steps
Output:
Output amplitude: 0 to 10 V, continuously ad-
justable
Power output: 10 W, permanent
Output current: 1 A, 2.0 A max.
Sweep:
Sweep modes: External, continuous internal, in-
dividual internal
Frequency range: 1 Hz to 100 kHz
Stop/start
frequency ratio: Max. 1000:1, e.g. 2 Hz to 2 kHz
max.
Time range: 0.04 s to 1000 s
External sweep: Start via trigger pulse or applica-
tion of 0 to 5 V control voltage;
max. modulation frequency: 200
Hz
Internal sweep: Start and stop via Start/Stop but-
ton; one trigger output per cycle
plus proportional voltage
General data:
Power supply: Plug-inpowersupply,12VAC,2 A
Dimensions: 170x105x40 mm3
Weight: 0.5 kg

3
4. Operation
4.1 Turning on
Plug the power supply into the mains and con-
nect it to the function generator.
This immediately turns on the equipment so that it is
ready to use. The top line of the display will indicate
the current frequency while the bottom line shows
the DC offset and the waveform.
4.2 Setting the frequency
Use the frequency knob to set the desired fre-
quency.
Push in and turn the knob to select the digit to be
changed on the display and then turn the knob
to set the specific frequency.
The active digit will be indicated on the display by a
flashing underline character.
4.3 Setting the offset
Press the Offset button to activate offset adjust-
ment.
Turn the frequency knob to set the required
value in steps of 0.1 V.
Pressing in the frequencyknob resets the value back to
zero.
When the desired value has been set, Press Offset
again.
4.4 Selecting a waveform
Press the waveform button until the waveform
you want is indicated on the display.
It is possible to select a sine wave square wave or
triangular wave.
4.5 Sweep
Press the Sweep button to activate sweep mode.
The initial frequency is shown on the top line of the
display, while the bottom shows the DC offset, the
waveform and the word "START".
Turn the frequency knob to set the desired initial
frequency as described in section 4.2.
To set the frequency for when the sweep stops,
press the Sweep ´button again.
The bottom line of the display will show the word
"STOP".
Turn the frequency knob to set the desired fre-
quency for when the sweep stops.
Pressing the Sweep button again now sets the
equipment into sweep mode. The sub-modes Exter-
nal, Internal Continuous or Internal Single will be in-
dicated on the top line of the display.
Turn the frequency knob to select the desired
sub-mode for the sweep function.
Press Sweep again.
If external mode has been selected, then "EXT" will
be displayed at the bottom right of the display. If in-
ternal mode was display, the word "TIME" will be dis-
played there.
Adjust the sweep time by turning the frequency
knob and press Sweep again.
The start frequency will be shown on the display and
the word "READY" will appear at the bottom right.
Press Offset/Start/Stop to start the sweep.
While the sweep function is operating, the current
frequency will be indicated on the top line of the dis-
play, while the bottom line shows the DC offset, the
waveform and the word "RUN". The sweep can be
paused by holding down the Offset/Start/Stop but-
ton. Pressing it again allows the sweep to continue.
The word "BREAK" will be displayed while it is
paused.
To exit sweep mode press Sweep again.
In order to modify the values, it is necessary to exit
sweep mode and initiate the procedure again. It
should be noted that the DC offset cannot be altered
by this means.

4
5. Care and maintenance
Before cleaning the equipment, disconnect it
from its power supply.
Do not clean the unit with volatile solvents or
abrasive cleaners.
Use a soft, damp cloth to clean it.
6. Disposal
The packaging should be disposed of at local
recycling points.
7. Sample experiments
7.1 Demonstration of standing transverse
waves on a rubber rope and investigating
the dependence of their wavelength on the
frequency and the tension
The following equipment is also required to perform
the experiment:
1 Accessories for rope waves 1008540
1 Dynamometer, 5 N 1003106
1 Vibration generator 1000701
Experiment leads
Set up the waves on a string accessory as in its
manual.
Hang the dynamometer on the holder. If neces-
sary, first calibrate the zero point.
Connect the function generator to the vibration
generator.
Attach the rubber rope to the vibration generator,
pass it under the deflection device then upwards,
and hang it on the dynamometer. Ensure that it
runs as parallel as possible to the base plate.
Apply tension to the rubber rope by moving the
dynamometer.
On the function generator, select the “sine” wave-
form.
Adjust the frequency until 4 vibration loops are
obtained.
The wavelength is now half the length of the cord.
Move the dynamometer higher up the rod until
the tension is four times the previous value.
The band now vibrates with just one peak and one
trough. The wavelength is therefore equal to the length
of the band.
The following parameters are found to give good re-
sults:
Rope length (= distance from vibration generator to
deflection device): 60 cm, Frequency; approx. 44 Hz,
initial cord tension: 0.5 N.
Rope length: 70 cm, Frequency; approx. 38 Hz, ini-
tial cord tension: 0.5 N.
7.2 Parallel LC resonant circuit
The following equipment is also required to perform
the experiment:
1 Basic Experiment Board
@230V
1000573
@115V
1000572
1 Function Generator FG 100
@230V
1009957
@115V
1009956
1 Set of 15 Experiment Leads,
1 mm², 75 cm
1002840
1 VinciLab
1021477
1 Coach 7, License
1021522
1 Voltage Sensor 10 V,
1021680
differential
1 Current Sensor 500 mA
1021679
Set up and perform the experiment according to in-
struction (8000652, UE3050400)
.
Should you need to dis-
pose of the equipment
itself, never throw it
away in normal domes-
tic waste. Local regula-
tions for the disposal of
electrical equipment
will apply.

5
Fig. 1 Experiment set-up to demonstrate standing transverse waves
Fig. 2 Experiment set-up for parallel LC resonant circuit