Technical Data | AREAS OF APPLICATION
The professional measuring device for electric and magnetic fields
The field meter FM 6 is a multi-purpose electrosmog meter for alternating electric and magnetic fields. On account of its effective value display according to TCO/MPRII and the high degree of accuracy, it is primarily used for professional purposes. Private users, however, also appreciate FM 6 because it is easy to operate. FM 6 is the standard meter used in organic architecture thanks to its accuracy of measurement and the numerous options for accessories and connections. The qualities of FM6 have been confirmed by Öko-Test (6/96); the test winner FM 6 was the only electrosmog meter out of 15 tested devices that was considered "recommendable".
Device description FM 6
Compact multi-purpose measuring probe with directional characteristics
The separate probe casing houses two detectors for electric and magnetic measurements. For this reason, it is not necessary to change probes, the measurement can be carried out quickly and easily. The directional characteristics of the external probe enable you to localise disturbing sources, while the display unit provides for a comfortable reading of the measured values.
Wide dynamic response range
The three ranges of measurement each for alternating electric and magnetic fields enable you to identify low field intensities like those that are present in living rooms and bedrooms as well as high field strengths generated in the immediate vicinity of technical installations.
Large frequency range
The wide-band frequency range from 16 Hz up to 100 KHz includes a large spectrum of technically generated alternating electrical and magnetic fields: from the 16l7 Hz of the German Federal Railways to the 50 Hz of the power supply network, ranging to higher frequencies of screens and switch mode power supply units.
Frequency analysis by way of filtering functions
Two frequency filters enable you to differentiate the electrosmog on the basis of the components of traction current and higher-frequency fields of electronic devices included in it.
Potential-related measuring of electric fields
A pre-defined potential of the measuring device is necessary to carry out a sound measurement of an electric field. FM 6 offers two options for this purpose: the device can assume the potential of the person who carries out the measurements, or it can be grounded.
Effective value conversion (TRMS)
The field meter FM 6 uses real effective value conversion of all forms of signals; this type of conversion is otherwise only provided by devices that are considerably more expensive. This method enables measurements according to the TCO/MPRII regulations and the German Federal Immission Control Act (BImSchG).
Well-readable display of measured values
The large, battery-saving digital display enables a clearly legible presentation of the measured values.
Automatic battery check
The display shows a message when the battery needs to be changed.
Acoustic indication of the measured values
The audio oscillator enables an acoustic indication of the field strength.
Multi-purpose connection for additional devices
The optionally available multi-functional connecting socket supplies an AC voltage signal and a DC voltage signal of the measured value and enables an external voltage supply for FM6 in addition.
Measuring of capacitative coupling
Persons and metal objects (bedsteads, desk lamps, etc.) absorb, similar to an antenna, voltage that can be measured using a manual electrode or a measuring tip (part No. 110) from the electrically loaded environment.
Sensor according to TCO/MPRII regulation for computer workplaces
Alternating electric fields can be measured with a field sensor complying with the TCO/MPRII standard using the ELECTRIC FIELD PROBE EFS 6 (part No.: 170).
FM6 - the systematic field strength measuring device
The field meter is more than just one individual measuring device; various extension and connecting options make FM6 a system for the measuring of field strengths. For recording field strengths, there are the multi-purpose measuring probe as well as the TCO compliant ELECTRICAL FIELD PROBE EFS 6 (part No. 170); for measuring voltages, the measuring cable (part No. 110) is available.
In professional applications, it is often desirable to examine the alternating fields for their time sequences or frequency components of alternating fields. For this reason, the field meter is available with a multi-functional output that enables you to upgrade FM 6 in connecting with corresponding additional devices into a recording and analysis system. The spectrum analyser SP 10 (part No. 220) is used to classify measured alternating fields according to 14 frequency bands; this enables you to identify many causes of interference fields on the basis of their frequency characteristics. The measured values converter MK 8 (part No. 200) digitises the analogue values of FM 6 and transfers them to a PC where the data is stored, represented in a graphical form and printed using the associated software.
Standardised plugs and connecting sockets can therefore be used to connect measuring and recording devices of various manufacturers, like for example recorder, oscilloscope, multimeter, active loudspeaker, etc.
AREAS OF APPLICATION | Top of page
Technical Data FM 6
Display
- digital, 2 1/2 lines, LCD
Ranges of measurement
- Electric field: 20 / 200 / 2000 V/m
- Magnetic field: 200 / 2000 / 20000 nT
- Alternating voltage: 20 / 200 (/2000) V
Resolution
- Electric field: 0,1 V/m
- Magnetic field: 1 nT
- Alternating voltage: 0,1 V
Measuring accuracy (50 Hz, 50% rH)
- Electric field: ± 10% with pre-defined measuring method
- Magnetic field: ± 5%
- Alternating voltage: ± 2,5%
- >10 kHz and value<40 Digit: ±10 Digit
Frequency response
- without filter: 16 Hz -100 kHz ± 1 dB
- with Filter HP 50: 50 Hz - 100 kHz ±
- with Filter TP 2k: 16 Hz - 2 kHz ±
Rectifier
- Real effective value (TRMS)
Multi-purpose connection
Outputse
- Output resistance: 500 Ohm
- Alternating voltage: 0..200 mV
- Direct voltage: 0..2 V
- Probe: max 30 V/0,2 A
Inputs
- Power supply : 7,5 V - 9,5 V, potential-free
Admissible ambient temperature
- 0° C..+55° C
Current input
- 7 mA
Power supply
- 9V E-Block
Measurements
- Field meter: 156 x 85 x 45 in mm
- Probe: 138 x 40 x 24 in mm
Weight
- Field meter: 265 g (incl. battery)
- Probe: 110 g
Cable
- Probe: 0,75 m
- Earthing cable: 5 m (10 m as accessory equipment)
Housing
- Black, impact-resistant plastic (ABS)