Teslameter FM 302 for AS-active-probes

Teslameter FM 302 for AS-active-probes

Teslameter FM 302

Teslameter FM 302



For the Teslameter FM 302 an AS-active-probe is needed.



The Teslameter FM 302 has a two-line LCD display. It displays measured values in 4½-digit.

Display des Teslameter FM 302

Via the keypad other functions can be selected and the values will be displayed:

  • DC or  AC / RMS
  • Absolute or relative measurements

Display des Teslameter FM 302 in Relativ-Messung

  • Minimum / Maximum values

Display des Teslameter FM 302 in Maximum-Messung

  • Setting of the measurement interval
  • additional filtering
  • Zeropoint compensation

Measuring range and Units

The FM 302 can be used with all AS-active-probe in the ranges of µT, mT- and Tesla.

The Teslameter has three sensitivity ranges, corresponding to amplification factors of x1, x10 und x100. The selected range has influence on the display as well as on the analog-output. For each AS-active-probe this results in three sensitivity ranges. Therefore it’s possible to measure and display large and small values accurately.

The displayed unit can be switched between Tesla, Gauss, A/m (ampere per meter), A/cm (ampere per centimeter) and Oersted.

The resulting sensitivity range results from the sensitivity class of the used AS-active-probe and the selected amplification factor.

More details can be found in Empfindlichkeitsklassen (german language) .

More background can be found in this application note PDF Icon PE005 Magnetic units of measurement and their conversion.

Calibrated Analog Output

The Teslameter FM 302 comes with a calibrated analog output. The BNC- connector provides the signal with full accuracy and full bandwith of teslameter and active-probe.

The transfer factor of the analog output is determined by the sensitivity class of the active-probe in use and the selected amplification-factor of the Teslameters FM 302. More details can be found in Empfindlichkeitsklassen (german language) .

USB Inteface

The USB driver of the Teslameter FM 302 creates a virtual serial port on your computer. This way any software that can communicate over serial lines, can also communicate with the FM 302.

Via the USB interface the Teslameter FM 302 can be controlled and measurement data can be read. The control is done withASCII-based commands. A complete documentation of the commands can be found in the operating manual.

Control Software

Included in delivery is a control software for the Teslameter FM 302.

The control software provides the following functionality:

  • Access to all settings
  • Displaying the current measured values
  • Logging of measured values (continually or after pressing a key)
  • Oscilloscope-like graphical displaying of the measured values
  • Comparator-like display of adjustable tresholds

Steuersoftware für das Teslameter FM 302 Control Software for the Teslameter FM 302



PDF Icon Data sheet Teslameter FM 302

Operating Manual

PDF Icon Operating manual
for AS-active-probes, Teslameter FM 302, AS-probe adapter, AS-Adapter 3