Datasheet
METRAHITULTRA
High Resolution TRMS System Multimeter
4
GMC-I Messtechnik GmbH
Internal Clock
Time format DD.MM.YYYY hh:mm:ss,0
Resolution 0.1 sec.
Accuracy 1 minute per month
Temperature Influence
50 ppm/K
Influencing Quantities and Influence Error
1
With zero balancing
2
Prerequisite: stable ambient temperature (t > 30 min.)
1
Intrinsic uncertainty in the frequency response applies as of 10% ... 100% of the
measuring range.
2
Signals > 50 kHz: plus 5%
3
Power limiting: frequency x voltage max. 3 x 10
6
V x Hz where U > 100 V
5
Except for sinusoidal waveform
Reference Conditions
Ambient temperature +23 C 2K
Relative humidity 40 to 75% (no condensation
allowed)
Meas. quantity frequency Range: 45 ... 65 Hz
Meas. quantity waveform Sinusoidal
Battery voltage range: 1.8 ... 3.2 V
Response Time (after manual range selection)
Data Interface – Infrared
Typ e
Optical via infrared light through the housing
Data transmission Serial, bidirectional (not IrDa compatible)
Protocol Device specific
Baud rate 38,400 baud
Functions – Select/query measuring functions
and parameters
–
Query momentary measurement data
– Read out stored measurement data
The USB X-TRA plug-in interface adapter (see accessories) is
used for adaptation to the PC’s USB port.
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
optional IR-USB cable connection using the USB X-TRA acces-
sory (Z216C).
The METRAHIT ULTRA BT with Bluetooth interface is connected
directly to the Bluetooth interface of a Windows PC. However, no
communication takes place with peripheral devices such as print-
ers, 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 the
multimeter and the PC is authentication by means of an access
code which must be set up at the multimeter and at the PC.
Influencing
Quantity
Sphere of
Influence
Measured Quantity /
Measuring Range
1
Influence Error
(...% rdg. + ... d) / 10 K
Tempe rature
0 C ... +21 C
and
+25 C... +40 C
V 0.05 + 5
V , V , dB 0.2 + 10
300 ... 30 M, 0.1 + 10
A , A , A 0.3 + 10
30 nF, 300 nF, 3 F, 30 F 0.5 + 10
3 nF, 300 F3 + 10
Hz 0.05 + 5
0.1 + 5
C/F (Pt100/Pt1000) 0.1 + 10
C/F thermocouple K
2
0.1 + 10
Influencing
Quantity
Measured Quantity /
Measuring Range
Sphere of Influence
Intrinsic Uncertainty
... % rdg. + ... d)
1
Frequency
V
AC
V
AC+DC
300.00 mV
...
30.00 V
> 15 Hz ... 45 Hz 2 + 30
> 65 Hz ... 1 kHz 1 + 30
> 1kHz ... 20 kHz 2 + 30
> 20kHz ... 100 kHz 3 + 30
2
300.00 V
3
600.00 V
3
> 15 Hz ... 45 Hz 2 + 30
> 65 Hz ... 1 kHz 1 + 30
> 1kHz ... 20 kHz 3 + 30
I
AC
I
AC+DC
300 μA ... 10 A
> 1 5 H z ... 6 5 H z
3 + 30
> 6 5 H z ... 1 0 k H z
Influencing
Quantity
Sphere of
Influence
Measured Quantity /
Measuring Range
Influence Error
5
Crest Factor CF
1 ... 3
V, A
1% rdg.
> 3 ... 5 3% rdg.
Influencing
Quantity
Sphere of
Influence
Measured Quantity Influence Error
Relative
humidity
75%
3 days
instrument off
V, V, , A, Hz, C 1 x intrinsic uncertainty
Battery voltage 1.8 ... 3.6 V V, A, , F, Hz, dB, C
Included in intrinsic
uncertainty
Influencing
Quantity
Sphere of Influence
Measured Qty./
Measuring Range
Damping
Common mode
interference
voltage
Interference quantity max. 600 V V
(3 V ... 600 V MR)
> 120 dB
Interference quantity max. 600 V
50 Hz ... 60 Hz, sine
3 V > 60 dB
30 V > 65 dB
300 V/600 V > 50 dB
Series mode
interference
voltage
Interference quantity: V ,
respective nominal value of the
measuring range,
max. 600 V , 50 Hz
... 60 Hz sinusoidal
V> 70dB
Interference quantity max. 600 V V > 120 dB
Measured Quantity /
Measuring Range
Response Time,
Digital Display
Jump Function
of the Measured Quantity
V, V, dB
A, A
1.5 s
From 0 to 80%
of upper range limit value
3 nF ... 300 FMax. 3s
300 ... 3M 3s
From to 50%
of upper range limit value
30 M 8s
Continuity < 50 ms
C (Pt100) Max. 3 s
1.5 s
>10 Hz 1.5 s
From 0 to 50%
of upper range limit value