top of page

MASTECH MS2308 Advanced Earth Resistance Tester

The MS2308 is a versatile, high-precision earth ground resistance tester designed for multi-method resistance testing in residential, industrial, and infrastructure settings. Supporting 2-pole, 3-pole, 4-pole, and clamp methods, it offers a comprehensive solution for ground system verification, including soil resistivity, resistance compensation, and interference voltage detection.

With 9999-count dual digital/analog display, automatic ranging, and multiple test frequencies, the MS2308 delivers accurate results even in the presence of electrical noise. Additional features such as data storage, USB connectivity, and limit alarms make this instrument a reliable tool for professional field applications.

Key Features

  • Dual display: Digital (9999 counts) & Analog bargraph

  • Automatic power-off

  • Clock function

  • AVG (average) function

  • Compensation resistance (RK) testing

  • Limit-value alarm indicator

  • Battery capacity indicator

  • Backlit LCD display

  • User-defined spacing for resistivity testing

  • Data storage: 100 test records

  • USB interface for data transfer

Technical Specifications

Measurement Modes & Parameters

3-Pole / 4-Pole Earthing Resistance (AC)

  • Test Voltage: AC 20 V / 48 V

  • Test Frequency: 94 Hz / 128 Hz

  • Range: 0.02 Ω – 300 kΩ

  • Resolution: 0.001 Ω

  • Accuracy: ±(5% + 10)

Clamp Mode (No Auxiliary Rods)

  • Test Voltage: AC 20 V / 48 V

  • Test Frequency: 94 Hz / 128 Hz

  • Range: 0.02 Ω – 150 Ω

  • Resolution: 0.001 Ω

  • Accuracy: ±(10% + 10)

2-Pole Resistance (AC)

  • Range: 0.02 Ω – 300 kΩ

  • Resolution: 0.001 Ω

  • Accuracy: ±(5% + 10)

2/4 Pole Resistance (DC)

  • Interfering Voltage Tolerance: 1–50 V (AC/DC)

  • Interfering Frequency: 16 Hz – 400 Hz

  • Range: 0.02 Ω – 3 kΩ

  • Resolution: 0.001 Ω

  • Accuracy: ±(5% + 10)

Soil Resistivity (ρ)

  • Test Voltage: AC 20 V / 48 V

  • Test Frequencies: 94 Hz / 105 Hz / 111 Hz / 128 Hz / AFC (Auto Frequency Control)

  • Range: 0.02 – 1000 kΩ·m

  • Resolution: 0.001 Ω

  • Accuracy: ±(5% + 10)

Compensation Resistance (RK)

  • Test Voltage: AC 20 V / 48 V

  • Frequencies: 94 Hz / 105 Hz / 111 Hz / 128 Hz / AFC

  • Range: Up to 30 Ω

  • Resolution: 0.001 Ω

  • Accuracy: ±(3% + 10)

Interference Measurement Capability

Parameter Range Resolution Accuracy
Interfering Voltage 1 – 50 V AC/DC 0.1 V ±(5% + 5)
Interfering Current 20 mA – 2 A 1 mA ±(5% + 5)
Interfering Frequency 16 Hz – 400 Hz 1 Hz ±(1% + 10)

Additional Information

Function Specification
Display Count 9999
DC Voltage Range 0 – 20 V
AC Voltage Range 0 – 48 V
3-Pole & 4-Pole Resistance Yes
Resistance Range Up to 300 kΩ
Soil Resistivity Yes
Overrange Indication Yes
Low Battery Indicator Yes
Backlight Yes
Data Logging 100 groups
Interface USB
Data Hold No
Resistivity Test Point Setting Yes
bottom of page