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6. Operation
6.3.2.2 Power Supply
The Teslameter FM 302 may be powered by three different ways. The
device can run from an internal battery / accu (see section 6.3.2.3 Battery /
Accumulator Operation), an external 9 V power adapter (see section 6.3.2.4
Power Adapter Operation) or from the USB connection (see section 6.3.2.5
USB Operation).
The instrument automatically is powered from the power adapter or, while
available, the USB connection and uses the battery only if no other power
source is available. So the battery is preserved.
The switching between the different sources is done automatically and
without interrupting the operation of the device.
The state of the power supply is shown in the display of the Teslameter
FM 302 (see also section 6.3.1.6 Display).
6.3.2.3 Battery / Accumulator Operation
− Open the case
FM 302.
− Take the desired probe, connect to Teslameter FM 302 and screw.
− At the AS-NTP 0,6 probe unscrew and remove the protective cap. At the
AS-NTP-Flex probe and AS-NTP-Hot-05 probe careful draw of the
protective cap.
− Switch the instrument ON with the power switch on the left hand side
(see section 6.3.1.4 Power Switch).
− Set the desired parameters with the keys of the keypad. Especially set
the appropriate measuring range with key "gain" (see section 6.3.1.9 Key
"gain" – Measuring Range and measuring mode DC or AC/RMS with key
"DC AC" (see section 6.3.1.8 Key "DC AC" – Measuring Mode.
− The magnetic field can now be measured with the probe.
− The battery life (operating time) is approx. 20 hours, depending on the
probe type.
6.3.2.4 Power Adapter Operation
− Open the case (printed lettering up) and remove the Teslameter FM 302
and the power adapter.
Projekt Elektronik
MESS - UND REGELUNGSTECHNIK GMBH
(printed lettering up) and remove the Teslameter
Page 35
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