5. Description
Projekt Elektronik
MESS - UND REGELUNGSTECHNIK GMBH
Page 14
Another feature of the Teslameter FM 302 is the calibrated analog output,
which is useful for display purposes (oscilloscope, plotter), data logging
(computer) and field control. Here the measured signal in DC or AC coupling
can be selected.
The operation of the Teslameter FM 302 is done via the keypad with 8 keys
which allow to set the functions of the device. For example the measuring
time can be adjusted to meet the requirements of the respective measuring
task, depending if a rather fast capturing of measured values or low noise
measured values are more important. For further filtering a digital filter can
be activated which works as a moving average filter on the measured
values.
In addition to absolute measurement the Teslameter FM 302 offers a
function to relative measurement and for measuring the minimal and
maximal value.
Moreover the Teslameter FM 302 features a USB interface which allows to
control the device and read out the measured values. There are even more
control options available. Also the device can be powered via the USB
connection. At the computer side the Teslameter FM 302 appears as a
virtual serial port so it is easy to integrate the device into existing systems.
The Teslameter FM 302 with its AS-active-probes is not disturbed in its
function by stronger magnetic fields. The device works reliable even at a DC
field of 350 mT. Neither the actual measurement nor the communication with
the computer is interfered. It has just to be considered the occurring action
of force of the device. The main reasons are the battery and the probe
connector.
The Teslameter FM 302 is delivered with a control software. The software
allows to control all settings of the Teslameter via the PC. Thereby the
software offers the complete range of functions which are possible with the
commands via the USB interface.
Besides the simple display of the measured value the software offers an
oscilloscope like display of the last 100 measured values. The time axis
depends on the selected measuring time. The scale of the amplitude axis is
given by the connected probe and the selected sensitivity of the FM 302.