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62 GMC-I Messtechnik GmbH
Technical Data
Data Interface – Bluetooth (M248B only)
The METRAHIT ULTRA BT Bluetooth multimeter variant (M248B) is
identical to the METRAHIT ULTRA (M248A), except that it is also
equipped with a Bluetooth interface.
Wireless data exchange via Bluetooth is an alternative to the op-
tional IR-USB cable connection using the USB X-TRA accessory
(Z216C).
The METRAHIT ULTRA BT with Bluetooth interface is connected di-
rectly to the Bluetooth interface of a Windows PC or smartphone
(Android). However, no communication takes place with periph-
eral devices such as printers, scanners and the like.
The class 2 Bluetooth module which is integrated in the instru-
ment achieves transmission ranges of up to 20 m, depending on
propagation conditions.
Remote control via Bluetooth is identical to corresponding com-
munication via an IR-USB connection.
The only prerequisite for wireless data exchange between multi-
meter and PC or smartphone (Android) is switching from Infrared
to Bluethooth and authentication by means of an access code
which must be set at the multimeter and at the PC or smart-
phone, see section 7.2.
Information on the smartphone app METRALOG is available in sec-
tion 10.4.2.
Internal Measured Value Storage
Memory capacity 16 MBit (2 MByte) for approx. 300,000
measured values with time stamp
Power Supply
Battery 2 ea. 1.5 V mignon cell (size AA), alkaline
manganese per IEC LR6 (2 ea. 1.2 V NiMH
rechargeable battery also possible)
Service life With alkaline manganese: approx. 200 hrs.
METRAHIT ULTRA BT: When the Bluetooth
interface is activated, power consumption
rises considerably and the service life is
reduced accordingly.
Battery test Battery capacity display with battery sym-
bol in 4 segments: .
Querying of momentary battery voltage via
menu function.
Power OFF function The multimeter is switched off automati-
cally:
– If battery voltage drops to below
approx. 1.8 V
If none of the keys or the rotary switch are
activated for an adjustable duration (10 to
59 min.) and the multimeter is not in the
continuous operation mode
Power pack socket
If the NA X-TRA power pack has been
plugged into the instrument (see accesso-
ries), the installed batteries are discon-
nected automatically.
Rechargeable batteries can only be
recharged externally.
62


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