Telurometer AMRU 120

Technical method with 3 or 4 poles, Technical method with the use of additional clamps, Measurement of the continuity of compensating and protective connections with self-neutralization function, Double clamp method without the need to place auxiliary electrodes, Soil resistivity in addition to

It allows the following measurements to be made:

Grounding resistance using auxiliary electrodes
Earthing resistance using auxiliary electrodes and clamps (for multiple earthing measurements)
Grounding resistance using double clamps (for grounding measurements when auxiliary electrodes cannot be used),
Soil resistivity (using Wenner's method)
Measurement of the continuity of compensating and protective connections (complying with IEC 60364-6-61:2000 pt 6.12.2) with self-neutralisation function - by means of current 200mA

Additionally:

Measurement of the resistance of the auxiliary electrodes Rs and Rh
Measurement of disturbance voltage
Measurement of the frequency of the disturbance signal
Measurement in the presence of disturbance voltages in networks with frequency 50Hz and 60 Hz
Selection of the maximum measurement voltage (25V and 50V)
Entering the distance between the electrodes for resistivity in meters (m)
Storage for 990 measurements (10 banks of 99 cells)
Calibration of the used clamps
Real Time Clock (RTC)
Data transmission to the computer (USB)
Accumulator energy indicator

UN disturbance voltage measurement (RMS)

Range	Resolution	Accuracy
0...100V	1V	±(2% v.m. + 3 digits)
Alarm if voltage exceeds 24V or 40V rms
Measurement for DC and AC 45...65 Hz

Measurement of continuity of protective and compensating connections


Measuring range according to IEC61557-5: 0.24Ω... 19,9kΩ
Range	Resolution	Accuracy
0,00...19,99Ω	0,01Ω	±(2% v.m. + 2 digits)
20,0...199,9Ω	0,1Ω
200...1999Ω	1Ω
2,00k... 9,99kΩ	10Ω	±(5% v.m. + 2 digits)
10,0k... 19,9kΩ	100Ω
Measurement method: two-wire technique
Voltage between terminals: < 24Vrms but >4Vrms
Measuring current: short-circuited >200mA
Measurement current frequency: 125 (for 50Hz network) or 150Hz (for 60Hz network), selection of measurement frequency in menu

Self-neutralization of measurement cables
"v.m." - measured value

Earth resistance measurement (3 or 4 pole method)
Measuring range according to IEC61557-5: 0.30Ω... 19,9kΩ
Range	Resolution	Accuracy
0,00...19,99Ω	0,01Ω	±(2% v.m. + 2 digits)
20,0...199,9Ω	0,1Ω
200...1999Ω	1Ω	±(5% v.m. + 4 digits)
2,00k... 9,99kΩ	10Ω
10,0k... 19,9kΩ	100Ω
Method of measurement: three- and four-wire technique
Measuring current: short-circuited >200mA
Terminal to terminal voltage: selective <25V AC or <50V AC
Measurement current frequency: 125 (for 50Hz network) or 150Hz (for 60Hz network), selection of measurement frequency in menu

Measurement of the resistance of the RH and RS auxiliary electrodes

Range	Resolution	Accuracy
0...999Ω	1Ω	±(5% (RS +RE +RH ) + 8 digits)
1,00kΩ... 9,99kΩ	10Ω
10,0kΩ... 19,9kΩ	100Ω
Reading of the measured values of the resistance of the auxiliary electrode RH and RS on the

Measurement of the resistance of multiple ground connections using clamps and auxiliary electrodes (3 wires + clamps)


Measurement range according to IEC61557-5: 0.44Ω... 199kΩ
Range	Resolution	Accuracy
0,00...19,99Ω	0,01Ω	±(8% v.m. + 3 digits)
20,0...199,9Ω	0,1Ω
200...1999Ω	1Ω
Method of measurement: three- and four-wire technique
Measuring current: short-circuited >200mA
Terminal to terminal voltage: selective <25V AC or <50V AC
Measurement current frequency: 125 (for 50Hz network) or 150Hz (for 60Hz network), selection of measurement frequency in menu

Soil resistivity measurement Method of measurement: Wenner, p=2πLRE

Range	Resolution	Accuracy
0.00...199,9Ωm	0,1Ωm	depends on the basic error of the RE measurement in the 4-conductor system, but not less than ±1 digit
200...1999Ωm	1Ωm
2,00k... 19,99kΩm	10Ωm
20,0k... 99,9kΩm	100Ωm
100k... 999kΩm	1kΩm
L - the distance between the measuring probes: 1...50m

Measuring the resistance of multiple ground connections using double clamps


Range	Resolution	Accuracy
0,00...19,99Ω	0,01Ω	±(10% v.m. + 3 digits)
20,0...149,9Ω	0,1Ω	±(20% v.m. + 3 digits)
Measurement method: 2-pin technique
Measuring current frequency 125 (for 50Hz network) or 150Hz (for 60Hz network)


Electrical safety:
Type of insulation	Double, according to EN 61010-1 and IEC 61557
Measurement category	CAT III 600V according to EN 61010-1
Protection class, according to EN 60529	IP54
Other technical data:
Screen	Graphic LCD, illuminated
Interface	USB
Number of measurements using one set of accumulators	500
Warranty	36 months
Nominal conditions of use:
Working temperature	-10...+50°C
Storage temperature	-20...+70°C
Moisture	20...80%

Standard accessories:

50m cable on reel; yellow
25m cable on reel; red
25m cable on reel; blue
Probe with banana plug: yellow
2m cable with banana plug; yellow
2m cable with banana plug; black
Crocodile K01; black
30 cm probe to put in the ground (4 pieces)
L2 Case
USB cable for data transmission
Ni-MH battery 4,8V 3Ah
Power supply for charging Z7 batteries
Power supply cable
Meter carrying harness
Calibration certificate
Operation manual

Optional accessories:

Software for the creation of documentation
Software for the creation of drawings and diagrams
USB key
Crocodile K02; black
80 cm probe to be put in the ground
2m two-wire cable with banana plugs
L3 probe cover for 80 cm probe
C-3 Reception Clamps (Ø=52mm)
N-1 emission clamps (Ø=52mm)
Ni-MH battery 4,8V 4,2Ah
Vise
LR14 battery box (size C)
Driver for charging the car cigarette lighter socket batteries (12V)
Interface for wireless transmission OR-1

Usando el Telurómetro AMRU 120 de Amperis