8-1
8 Specifications
The specifications are valid for the following conditions and settings unless
otherwise stated:
• Ambient temperature: 23 °C (±3 °C)
• Relative humidity: 40 % ... 60 %
• Sine wave signal (CW)
• Root mean square value (RMS)
• Lower frequency range limit: 30 Hz
• Operation from rechargeable or alkaline batteries
Note: The use of connecting cables for the external connectors (RS-232,
Scope and Charge) can alter the specifications and the measured
value that is displayed. If you notice any such changes, experiment
by moving the position of the cable in the field until the coupling
effects are minimized.
8.1 Functional principle
The voltage induced in a measurement coil (probe) is evaluated in order to
measure the magnetic flux density. The signal voltage is digitized and
evaluated by a digital signal processor (DSP). The DSP simulates the
selected filter characteristics and calculates the flux density resulting from
the voltage.
The orthogonal configuration of the three measurement coils allows the field
to be measured isotropically (i.e. independent of spatial direction). The three
channels are output with their correct phases.
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