Datasheet

3-349-558-03
5/8.17
GMC-I Messtechnik GmbH
METRAHITT-COM PLUS
Cable Multimeter for Measurements
in Symmetrical Copper Cable Networks
DAkkS Calibration Certificate included
German
Accreditation Body
D-K-15080-01-01
300 V CAT III
600 V CAT II
• Data memory and internal clock, power pack adapter socket
• Bidirectional infrared interface
for exchanging data with a PC
• Windows software available as accessory for processing and
graphic display of measured values via USB interface
• New housing design, separate battery and fuse compartments,
intelligent key functions with SMD button
• Housing with IP 54 protection, dust and splash protected,
impact-resistant protective rubber cover
Applications
The METRAHIT T-COM PLUS cable multimeter is a rugged portable
measuring instrument for use in the field. It is used to perform
measurements for pinpointing errors in cable networks. It mea-
sures all cable and system related parameters such as voltage,
current, resistance, insulation and loop resistance, capacitance
and cable length. Interruption of a single core, or contact with an
open-circuit core (capacitive asymmetry), is detected by means of
polarity reversal and is indicated at the high-speed logarithmic bar
graph display.
Features
RMS Value with Distorted Waveshape
The utilized measuring method allows for waveshape-independent
TRMS measurement of periodic quantities (AC) and pulsating
quantities (AC and DC) for voltage and current at up to 10 kHz.
Activatable Filter for V AC Measurements
A 200 Hz low-pass filter can be activated if required, e.g. for mea-
surements at cables with parasitic external signals. The input sig-
nal is additionally monitored by an independent voltage compara-
tor during the low-pass filter function, and dangerous voltage is
signalled.
Display of Negative Values at the Analog Scale
Negative values are also displayed at the analog scale for zero-
frequency quantities (V DC), allowing for observation of measured
quantity fluctuation around the zero-point.
Automatic/Manual Measuring Range Selection
Measured quantities are selected with the rotary switch. The mea-
suring range can be automatically matched to the measured
value, or selected manually.
Loop Impedance Measurement
Loop impedance can be measured within a range of 100 m and
3.1 k with a constant current of I
C
= 2 mA. The threshold value
for acoustic signaling is adjustable.
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 is adjustable.
Diode Testing with Constant Current I
c
= 1 mA
This function can be used to test the polarity of diodes, and to
test electrical circuits for short-circuiting and interruptions. The
test voltage source makes it possible to measure LEDs and
reference diodes up to 5.1 V, e.g. also white LEDs.
• Insulation resistance measurement (test voltage: 10 V and 100 V)
with simultaneous recognition of interference voltage (at
100 V) as well as polarity reversal
• Interference-immune capacitance measurement and cable length
measurement
• Galvanic signature analysis
• Loop Impedance Measurement RSL with 2 mA constant current
• Cable symmetry testing with rapid changeover switching
between terminals a-b-E
• Multifunctional multimeter (V, , F, Hz, , , mA, A)
• TRMS measurement , AC and AC+DC for current and voltage 10 kHz
• Low-pass filter can be activated (200 Hz/–3 dB) in the V AC range
• Direct current measurement, 100 nA to 1 A
• Current measurement with clip-on current sensors – CLIP
A transformation ratio of 1 mV:1 mA to 1 mV:1 A can be
selected and is taken into consideration at the display.
• Precision temperature indication in °C and °F for Pt100/Pt1000
• Diode measurement (I
K
= 1 mA, U
flow
to 5.1 V) and continuity testing
• Display: 3¾ place, 3100 digits, illumination can be activated,
analog display: linear or logarithmic for
insulation measurement
• Acoustic signals for: continuity testing, dangerous contact
voltages, exceeded overload limits
• Min-Max value storage and Auto DATA Hold