Idiomas disponibles
Idiomas disponibles
Do not allow the equipment to come into
contact with any liquids or corrosive media.
This applies in particular to the field detector
vanes.
In any experiments involving voltages in ex-
cess of 100 V it is essential that a 10 MΩ
(e.g. 1022192) resistor be incorporated into
the power supply circuit for protective pur-
poses (see Fig. 2 and Fig. 3).
Be careful when working at voltages with
which it is dangerous to come into contact.
In schools and training establishments, any
experiments involving equipment exhibiting
voltages with which it is dangerous to come
into contact must be supervised by trained
personnel.
2. Description
The electric field meter is intended to measure
field strengths of static electric fields or electrical
potentials. Using the voltage measurement at-
tachment (16) it is possible to measure DC volt-
ages between 1V and 1000V (a resistor must be
included upstream in the circuit).
Measurement principle
A uniformly shaped screening plate (rotor (B))
rotates in front of the stator (C) of the induction
electrode and continually interrupts the electrical
flux acting on the induction electrode itself. This
results in induced charging of the stator, ampli-
fied and rectified. The output voltage is therefore
proportional to the inducing voltage and thus the
electric field acting on the induction electrode.
Fig. 1: Field detection vanes
A Screening cylinder, B Rotor, C Stator,
Offset separation = 1.25 mm
Offset separation
To determine the electric field, it is essential to
take into account the separation between the
3B Scientific GmbH ▪ Rudorffweg 8 ▪ 21031 Hamburg ▪ Germany ▪
plates of the electrode and stator (C) (cf. Fig. 1).
This means that an extra 1.25 mm needs to be
added to the configured plate separation (dis-
tance between (13) and (15), the capacitor's
measurement plate).
Measuring ranges for electric field measure-
ment
1kV/m, 10kV/m, 100kV/m or 1000kV/m
Measuring ranges for voltage measurement
1V; 10V; 100V or 1000V
The selector switch (11) can be used to swap
between measurements of electric field and volt-
age.
Short the voltage measurement plate (16)) to the
ground socket (4).
Use the offset adjustment knob (5) to calibrate
the voltage between sockets (2) and (4) to zero.
When the capacitor measurement plate is used,
zero calibration takes place with the measure-
ment plate (13) attached and connected to the
ground socket (4).
Power supply:
Output voltage:
Measuring ranges:
1 V at the output corresponds to the following:
(E/kVm
Dimensions:
(L x W x H)
Weight:
1 Basic electric field meter module
1 Voltage measurement plate, range 1x
1 Capacitor measurement plate, 250 cm
1 Fixed capacitor plate
1 Plug-in power supply, 12 V AV/700 mA
Subject to technical amendments
3. Zero-point calibration
4. Technical data
Plug-in unit, 12 V AC
max. ±5 V
-1
) or U/V
1, 10, 100, 1000
140 x 110 x 120 mm
approx.
1 kg approx.
5. Equipment supplied
www.3bscientific.com
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