Earth Resistance Tester EM4055
EM-4055 earth tester is a digital, microprocessor controlled
instrument that allows to measure the earth resistance and ground
resistivity (using Wenner´s method), as well as to detect parasitic
voltages present in the ground. This instrument is suitable
to measure earth systems in power substations, industries, distribution
networks, etc., according to IEC 61557-5.
Earth resistance measurement
Ground resistivity (Wenner's method)
High spurious voltage rejection
Spurious voltage measurement
Up to 20KOhm resistance range
Heavy duty equipment
Automatic interference detection
Built-in printer (optional)
Direct reading of ground resistivity
Up to 50m selectable distance
4000 readings memory
RS-232 data output
||Earth resistance measuring of simple
or complex electrode systems, Ground resistivity measurements
(Four terminal Wenner´s principle), and Spurious voltage according
to IEC 61557-5
||During R measurement operators should
select the following test frequencies: 270 Hz ± 1 Hz or 1470
Hz ± 1 Hz
||In the voltmeter function, the equipment
operates as a CA conventional voltmeter, making it possible
to measure voltages generated by parasitic currents.
||Resistance: 0 - 20kOhm (autoranging)
Resistivity: 0 - 50kOhm (autoranging) Voltage: 0 - 60V~
||Resistance and Resistivity measurements:
± (2% of the measured value ± 2 digits) Voltage measurement:
± (3% of the measured value ± 2 digits)
||0.01Ohm in the resistance measurement.
0.01Ohm in the resistivity measurement. 0.1V in the voltage
||The short-circuit current is limited
to less than 3.5mA r.m.s. (according the IEC 61557-5 - 4.5 )
|IMMUNITY TO SPURIOUS
||During the R measurement, it allows
for the presence of spurious voltage up to 7V~.
OF AUXILIARY RODS
||In the R measurement it allows Raux
up to 50kOhm with error < 30%
|SERIAL DATA OUTPUT
||RS-232 @ 4800 bps. Suitable for data
collection in an external serial printer, computer or data-logger.
||For a printed register document of
||By means of an internal rechargeable
battery, 12V 2.3Ah.
||A smart, microprocessor-controlled,
circuit that adjusts the battery charge to the optimised parameters
in order to ensure highest service life. It is supplied by means
of an external power supply for 95-240V 50-60Hz (provided with
||It meets the requirements of IEC
61010-1/1990, IEC 61010, 1/1992 amendment 2
||In accordance with IEC 61326-1
||In accordance with IEC 1000-4-2
||In accordance with IEC 61000-4-3
||IP54 with closed lid.
||-10°C to 50°C
||-25°C to 65°C
||95% RH (without condensation)
||274 X 250 X 124 mm
||Approximately 3.0kg (without accessories)
||• Four steel rods. • Battery charger
power supply, 95 to 240V input voltage. • One 40 meters cable
in red colour. • Two 20 meters cable in blue and green colour.
• One 5 meters cable in black colour. • One 5 meters cable to
connect to the grounding system to be measured. • Canvas bag.