Datasheet
METRAHITENERGY
TRMS SYSTEM Multimeter
2
GMC-I Messtechnik GmbH
Convenient Triple Display
The momentary measured value and up to two additional values
are displayed simultaneously, for example:
• Extreme value with date and time
• Frequency and RMS value of AC measuring voltage
Or in the case of power measurement:
• Momentary measured values of active power, voltage and
current
• Maximum value for periodic power with date and time
User Safety and Overload Protection
Dangerous alternating contact voltages of greater then 30 V and
direct voltages of greater than 35 V are indicated visually.
Overload protection safeguards the instrument in all measuring
functions for up to 600 V. Voltages of greater than 600 V and cur-
rents of greater than 10 or 16 A are indicated acoustically. Dan-
gerous contact voltages are indicated when the 1 kHz low-pass
filter has been activated.
FUSE appears at the display if the fuse for the current measuring
input blows.
Switching between high and low impedance measuring functions
is disabled in the vent of dangerous contact voltage.
Three Connector Jacks with Automatic Blocking Sockets (ABS) *
All current ranges are implemented via a single connector jack
which prevents any possibility of operator error. Auto-ranging is
available in all current measuring ranges. Beyond this, the auto-
matic blocking sockets prevent incorrect connection of the mea-
surement cables, as well as selection of the wrong measured
quantity. Danger to the user, the instrument and the device under
test resulting from operator error is thus ruled out.
Exceptions include switch positions W, Wh and A.
* Patented (patent no. DE 10 2005 062 624, US 7,439,725)
RMS Value with Distorted Waveshape
The utilized measuring method allows for waveshape indepen-
dent RMS measurement (TRMS AC and AC+DC) for voltage up
to 100 kHz and current (up to 10 kHz and up to CF = 10).
Activatable Filter for V AC Measurement
A 1 kHz low-pass filter can be activated if required, for example
when measuring motor voltage at electronic frequency convert-
ers. The input signal is checked by a voltage comparator for dan-
gerous voltages as long as the low-pass filter is activated. A high-
voltage symbol appears at the display if dangerous voltage is
present.
Measuring of 5 V Square-Wave Signals
This function makes it possible to test circuits and transmission
cables by measuring the frequency and the duty cycle of pulses
with amplitudes of 2 to 5 V and frequencies of 1 Hz to 1 MHz.
Fast Acoustic Continuity Test
Testing for short circuiting and interruption is possible with the
selector switch in the position. The threshold value for acoustic
signaling can be set to 1, 10, 20 ... 500 in 10 ohm steps.
Automatic / Manual Measuring Range Selection
Measured quantities are selected by means of a rotary switch and
a function key. The measuring range is automatically matched to
the measured values. The measuring range can also be selected
and locked manually with a key.
Peak Value Monitoring for Automatic and Manual Measuring Range
Selection
The peak value is measured in addition to RMS measurement in
the V / A DC, AC and AC+D functions, as well as for power mea-
surement. If the peak value exceeds the valid range of the corre-
sponding measuring path, the instrument is switched up one
range, even if the displayed RMS measured value has not yet
reached the threshold value. If the momentary measuring range is
manually locked, (–)OL appears to indicate the peak value.
This assures that measurement only takes place in the permissi-
ble range for these functions (e.g. during measurement of a signal
with a high crest factor or measurement of the DC component of
high AC+DC voltages).
Measurement with Current Transformer Clamps and Sensors
Current transformer clamps and sensors are used for current
measurements without interrupting the circuit under test, and for
high amperages (> 16 A). All E series multimeters offer convenient
measurement with current clamps. The measured current value is
automatically calculated for the user with the help of the adjust-
able clamp factor.
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 and their time stamps can be queried at the display.
Memory Mode Operation
The METRAHIT ENERGY is equipped with a quartz-movement syn-
chronized measurement data memory (2048 kB), which has
enough capacity for up to 300,000 measured values depending
upon configuration. This allows for use of the instrument as an
autonomous real-time data logger.
Measurement data recording is executed either:
• In a time controlled fashion with an adjustable sampling inter-
val within a range of 0.5 ms (for V/A DC only) to 9 hours
• Dependent upon measured value in the event of exceeded
limit/delta value
• Automatically after stabilization of the measuring value
• As an individual measured value by pressing a key
Memory content can be read out from a PC with the help of the
USB X-TRA adapter, as well as analyzed and documented with
METRAwin 10 evaluation software.