HT Italia Marcotest G1 Multifunction Earth Tester


Advanced multifunction device for verification of electric safety of private and industrial electric systems (CEI 64-8 AND IEC/EN61557-1)

  • Earth resistance by voltammetric method with 2 or 3 spots in TT, TN and IT systems, overall earth resistance measurement and with clamp meter T2100 (optional).
  • Ground resistivity.
  • Measurement of electric parameters insingle- phase installations (V,A, W, VAR, VA, PF)
  • Measurement of continuity of protection conduc-

MacrotestG1 fully takes advantage of the touch-screen technology developed for MacrotestG3 and, hence, of all its settings, but its application range is formeasuring earth resistance by voltammetric method, also with optional clamp T2100 and, finally, for continuity measurement of protective conductors. Cutting-edge management of measurement with indication, at the end of each safety test, of compliance or non-compliance with requirements with simple symbols OK or NOT OK.


Symbols (c) Symbols (b) Symbols (a)

logopdf (2) Macrotest G1


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The HT Italia MACROTEST G1 is an innovative multifunction installation tester capable of carrying out safety tests on civil and industrial electric systems in compliance with IEC/EN61557-1. Its resistive TFT color touch-screen display, its icon menu, its help-on-line and its user-friendly development make the instrument extremely intuitive even for unskilled users. Its numberless features grant the user a wide range of applications in the world of measurements.

The multifunction installation tester MACROTEST G1 allows saving all measures into an internal memory so transferring the saved data to a PC by means of USB (provided as standard) or built in Wi-Fi interfaces with an iOS and Android smartphones or tablets.The software supplied among standard accessories allows printing testing reports.The multifunction installation tester MACROTESTG1 has as Optional clamp T2100 permits to quickly check the resistance of earth probes without disconnection from earth system.

More than one earth
The Macrotest Series easily measures earth ground resistance (2 and 3 Point Method) and soil resistivity (4 Point Method) with an easy to understand graphical user interface and color touchscreen. The meter can store internally up to 999 measurements. The included software enables easy data transfer to a computer, tablet or phone via built-in Wi-Fi or USB connection where it can be archived or used to generate reports.In addition to volt ampere method other testing modes can be adopted as follows:

  • Stackless earth ground resistance measurement with T2100 (optional)
    HT Macrotest Series adopts an innovative method for earth resistance measurement eliminating the worry of finding a place for auxiliary earth rods. Earth resistance measurement will be easier thanks to an algorithm HTEarth storing all measurements effected with clamp T2100 and calculating earth resistance value without disconnecting rods.
  • Soil resistivity
    It measures soil resistivity ( ) with 4-pole Wenner method.

Power and Load Analysis

  • Single Phase and Three Phase balanced systems
  • Voltage,Current and frequency measurement
  • Active power, reactive power andapparent power measurement
  • Cosphi, power factor measurement
  • THD% and Harmonics analysis up to 25 th

HT Italia Marcotest G1 Features:

  • Earth resistance and soil resistivity with 2/3/4 pole method
  • Stackless earth ground resistance (with T2100 optional accessory)
  • Power Analysis, Harmonic analysis up to 25th
  • Continuity of protection conductors with 200mA
  • Built-in WiFi interface to connect to iOS and Android devices
  • USB interface to connect to the PC
  • Color touch-screen display
  • Help on-line
  • Internal memory and Cloud Storage (trough iOS or Android device)
  • Rechargeable NiMH batteries (external battery charger)

HT Italia MACROTEST G1 Specifications:

Insulation with 1000VDC test voltage
Insulation with 500VDC test voltage
Insulation with 250VDC test voltage
Insulation with 50, 100VDC test voltage
Continuity of earth conductors with 200mA
Earth resistance with 2-pole and 3-pole
Earth resistance with ring mode ** **
Ground resistivity with 4-pole
Measurement of electrical parameters (V, A, W, VAR, VA, PF) 1 1
Harmonic analysis up to 25th order and THD% calculation (25th)1 (25th)1
Help on line
Internal memory to save measures
Optical/USB port for PC connection
Built-in WiFi communication interface
Hard carrying case Optional Optional
Technical Specifications:
Continuity with 200mA
Measuring range 0,01Ω÷99.9Ω
Accuracy ±(5.0% reading + 3 digits)
Test current > 200mA (R ≤ 2Ω)
Open circuit voltage 4V ≤ V0≤ 12V
Insulation resistance
Test voltage 50, 100, 250, 500, 1000VDC
Measuring range 0.01MΩ ÷ 99.9MΩ (50V)
0.01MΩ ÷ 199.9MΩ (100V)
0.01MΩ ÷ 499MΩ (250V)
0.01MΩ ÷ 999MΩ (500V)
0.01MΩ ÷ 1999MΩ (1000V)
Basic accuracy ±(2.0% reading + 2 digits)
Test current > 1mA on 1kΩ x Vnom (50,100, 250, 1kV)
> 2.2mA on 230kΩ @ 500V
Short circuit current <6.0mA for each test voltage
Line/Loop Impedance (L-L, L-N, L-PE)
Measuring range 0.01Ω ÷ 199.9Ω
Resolution 0.01Ω min (0.1mΩ with optional accessory IMP57)
Accuracy ±(5.0% reading + 3 digits)
Test voltage 100÷265V (L-N) / 100÷460V (L-L), 50/60Hz
Maximum test current 5.81A (@265V); 10.10A (@457V)
Selectable MCB protections curves B, C, D, K
Selectable fuse protections type aM and gG
Insulating material (test I2t) PVC, butyl rubber, EPR, XLPE
Earth resistance and ground resistivity
Measuring range R 0.01Ω ÷ 49.99kΩ
Measuring range 0.60Ωm÷3.14MΩm
Accuracy ±(5.0%reading + 3digits)
Test current 10mA, 77.5Hz
Open circuit voltage <20Vrms
Measurement of environmental parameters (with optional probes)
Air temperature (°C/°F) -20.0 ÷ 60.0 °C / -4.0 ÷ 140.0 °F
Relative humidity 0% ÷ 100%RH
Illuminance (Lux) 0.001lux ÷ 20klux
Accuracy ±(2.0% reading + 2 digits)
General Specifications
Power supply 6×1.2V rechargeable type AA NiMH
or 6×1.5V type AA alkaline
Battery life > 550 test (alKaline)
Display 320×240 resistive color LCD with touch screen
Memory 999 locations, 3 marker levels
PC interface optical/USB and Wi-Fi (with optional accessory C2013)
Dimensions (L x D x H) 225 x 165 x 75 mm / 8.8 x 6.5 x 2.9 in
Weight (including batteries) 1.2 kg / 2.5 lb
Safety IEC/EN61010-1, double insulation
Pollution degree 2
Mechanical protection CAT III 240V, max 415V among inputs
Reference standards IEC/EN61557-1-2-3-4-5-6-7
Working temperature 0°÷ 40°C / 32°÷104°F
Working humidity <80%RH
Storage temp. -10°÷ 60°C / 14°÷140°F
Storage humidity <80%RH


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