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Earth Resistance Meter MS5209


Broadly speaking, “earth resistance” is the resistance of soil to the passage of electric current. Actually, the earth is a relatively poor conductor of electricity compared to normal conductors like copper wire. But, if the area of a path for current is large enough, resistance can be quite low and the earth can be a good conductor. It is the earth’s abundance and availability that makes it an indispensable component of a properly functioning electrical system. earth resistance meter is used to measure the earth resistance.

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    Product Features:

    • The latest circuit design permits the instrument to operate with the minimum of influence from earth voltage and dearth resistance of auxiliary earth bars.
    • Auxiliary earth resistance and lead wire connection can be self-checked by pressing “BATT.CHECK” button. “OK” lamp lights up when the instrument is ready for accurate earth resistance measurements.
    • Low power consumption Only 12V/100mA max.
    • Push switch buttons permit smooth operation of the instrument .
    • Earth resistance value can be read directly from the scale.
    • Simplified measurement can be easily made by pressing the “Simplified Meas.” Switch button only. No need to use a shorting wire as terminals P and C and be internally shorted by pressing this switch.
    • Battery replacement can be easily made without removing the carrying case.
    • Hard plastic carrying case is water resistant and accommodates all accessories.

    Product Parameters:

    Measuring ranges:
    Earth resistance 10/100/1000Ω
    Earth voltage 30V AC (5KΩ/V approx.)
    Earth resistance Within ±5% of full scale
    Earth voltage Within ±5% of full scale
    Measurement system:
    Earth resistance
    By constant current inverter.
    800Hz approx,2mA
    Earth voltage
    By rectifier type
    5KΩ/V approx,40~500Hz
    Withstand Voltage: 1500V AC for one minute between electrical circuit and housing case.
    Self-Check facility: Lead wire connection to C and P terminals and proper auxiliary earth resistance can be checked by pressing “BATT.CHECK” button. “OK” lamp is illuminated.
    Batteries: 8pcs. 1.5V AA battery or equivalent
    Dimensions: 140(L)×140(W) ×90(D)mm
    Weight: 800g approx.
    Accessories: Test leads (red-15m,yellow-10m,green-5m) Auxiliary earth bars carrying case.

    Application and After-Sales Service:

    Earth resistance is measured in two ways for two important fields of use:
    1. Determining the effectiveness of “ground” grids and connections that are used with electrical systems to protect personnel and equipment.
    2. Prospecting for good (low resistance) “ground” locations, or obtaining measured resistance values that can give specific information about what lies some distance below the earth’s surface (such as depth to bedrock).


    Test leads (red-15m,yellow-10m,green-5m) Auxiliary earth bars carrying case.

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