6. Operation
Projekt Elektronik
MESS - UND REGELUNGSTECHNIK GMBH
Page 24
The prefix of the unit and the resolution and consequently the position of the
decimal point of the measured value are derived from the sensitivity of the
connected probe and the selected measuring range.
If no probe is connected to the device, the display shows “no probe“ instead
of measured value and unit.
Figure 7 Display without probe
If the measured value is to large for the selected measuring range the
display shows “overload”.
Figure 8 Display while range overflow
In the lower line of the display in absolute measurement left the currently
selected range is displayed. See also section 6.3.1.9 Key “gain” –
Measuring Range to change the measuring range.
In the lower left the state of the power supply of the Teslameter FM 302 is
displayed. A full battery symbol denotes, that the Teslameter FM 302 is
running on battery and that the voltage of the battery is sufficient to power
the device. An empty battery symbol signalizes that the voltage of the
battery has run significantly low and the battery should replaced (see section
8.2 Checking Battery and 8.3 Maintaining Accumulators).
Figure 9 Display battery state
If the Teslameter FM 302 is powered with a power adapter “EXT” is shown
instead of the battery symbol. If the device is connected via USB and is
powered via the USB connection the display shows “USB”.