Datasheet
METRAHITULTRA
High Resolution TRMS System Multimeter
2
GMC-I Messtechnik GmbH
Fast Acoustic Continuity Test
Testing for short circuiting and interruption is possible with the
selector switch in the position. The threshold value for acous-
tic signaling can be set to 1, 10, 20 ... 300 in 10
steps.
Automatic Storage of Measured Values *
The DATA function automatically saves the digitally displayed
measured value after settling in. Acoustic signaling is also used to
indicate whether the new measured value deviates from the initial
reference value less or more than 0.1% of the measuring range.
* Patented
Storage of Min-Max Values
Comparable to the slave-pointer function of an analog instrument,
the device saves the highest and lowest measured values after
the Min-Max function has been activated or reset. These extreme
values can be queried at the display.
Memory Mode Operation
The METRAHIT ULTRA is equipped with a quartz-movement syn-
chronized measurement data memory (2 MB), which has enough
capacity for up to 300,000 measured values depending upon
configuration. This allows for use of the instrument as an autono-
mous real-time data logger.
Measurement data recording is executed either:
• Time-controlled with an adjustable storage interval ranging
from 0.1 s to 9 hours
• Dependent upon measured value in the event of exceeded
limit/delta value
• Automatically after the measured value settles in
• As an individual measured value by pressing a key
Memory content can be read out from a PC with the help of the
interfaces mentioned below, as well as analyzed and documented
with METRAwin 10 evaluation software.
Battery Charging Status – Power Saving Circuit
The battery charging status is indicated by means of four symbols.
The device is switched off automatically if the measured value
remains unchanged for a period of between 10 and 59 minutes
(adjustable), and if none of the controls are activated during this
time. Automatic shutdown can be disabled by switching the
instrument to continuous operation. The standby mode for the
infrared/Bluetooth interface can be deactivated.
Protective Cover for Harsh Conditions
The instrument is protected against damage in the event of
impacts or dropping by means of a soft rubber cover with tilt stand
and test probe holder. The rubber material also assures that the
instrument does not wander if it is set up on a vibrating surface.
Data Interfaces
The device can be remote configured, and momentary and saved
measurement data can be read out via the bidirectional infrared
interface (M248B: additionally via Bluetooth interface).
The USB X-TRA interface adapter is required for the infrared inter-
face, and METRAwin 10 software is required for both interfaces
(see accessories). The interface protocol is available upon
request.
DAkkS Calibration Certificate
Each multimeter is individually adjusted, subjected to final inspection
and calibrated. Adherence to the specification is confirmed by means
of the included
DAkkS
calibration certificate, which is valid worldwide
(recognized by EA and ILAC).
After the specified calibration interval
has elapsed (recommended interval: 1 to 3 years), the multime-
ters can be recalibrated at any time in our own DAkkS calibration
laboratory.
Applicable Regulations and Standards
Included Functions
1)
16 MBit = 2048 kByte = 300,000 measured values, sampling rate adjustable from 0.5 seconds to 9 hours
Scope of Delivery
1Multimeter
1 KS17-2 cable set
2 Batteries, 1.5 V, type AA
1 Condensed operating instructions, English/German
1 CD ROM with operating instructions in English and German,
as well as other available languages
1 DAkkS calibration certificate
1 Rubber holster
Extended, Voluntary Manufacturer’s Guarantee
36 months for materials and workmanship
1 to 3 years for calibration (depending upon application)
I
IEC/EN 61010, part
1:2010/VDE 0411-1:2011
Safety requirements for electrical equipment for measurement,
control and laboratory use
DIN EN 61326-1
VDE 0843-20-1
Electrical equipment for measurement, control and laboratory use –
EMC requirements – Part 1: General requirements
DIN EN 60529
DIN VDE 0470, part 1
Test instruments and test procedures – degrees of protection
provided by enclosures (IP code)
Function METRAHIT ULTRA
Voltage, V
DC
(Ri 10 M)
✓
Voltage, V
AC
TRMS (Ri 5 M) ✓
Voltage, V
AC+DC
TRMS (Ri
5 M
)
✓
Frequency, Hz @ V
AC
, V
AC+DC
Up to 300 kHz
1 kHz low-pass filter @ V
AC
@ V
AC+DC
Bandwidth @ V
AC+DC
or V
AC
100 kHz
Pulse frequency, MHz @ 5 V TTL 1 Hz to 1 MHz
Duty cycle as %
2.0% ... 98%
Voltage level measurement, dB @ V
AC
@ V
AC+DC
Resistance, ✓
Continuity test where ICONST = 1 mA
✓
Diode test
where
I
CONST
= 1 mA ✓
Temp. measurement C/F @ T
C
Type K
Temperature measurement
C/
F R
TD
Pt100/Pt1000
Capacitance measurement in F
✓
Current, A
DC
300
A / 3 mA
30 mA/300 mA
3 A / 10 A (16 A)
Current, A
AC+DC
TRMS
Current, A
AC
TRMS
Bandwidth @ A
AC+DC
or A
AC
10 kHz
Frequency, Hz @ A
AC
@ V
AC+DC
Up to 30 kHz
Measurement with current clamp
with adjustable transformation ratio
mV / A
mA / A
Data logger function
1
(memory)
16 MBit (2 MB)
Relative value measurement REL ✓
Zero point ✓
Min / Max / data hold ✓
IR interface (38.4 kBd)
✓
Bluetooth interface (38.4 kBd)
M248B only
Power pack socket ✓
Rubber holster ✓
Fuse
10 A / 1000 V
Protection
IP 52
Measuring category
600 V CAT III
300 V CAT IV
DAkkS Calibration Certificate ✓