Section One
Introduction
Warning
Read this Manual carefully before use the Instrument.
Generalization
The instrument is a multifunctional earth resistance/earth resistivity tester equipped with a microcomputer.
The instrument employs digital signal settlement technology, which can draw earth measurement signals,
possess features of high frequency, high accuracy and high resistance, and measure earth resistance/ earth
resistivity accurately. The instrument can execute standard 3POLE and 4POLE earth resistance measurements and
has 2POLE earth resistance measurement and earth resistivity calculation functions as well.
⚫ The Instrument conforms to the following Safety Requirements:
IEC61010-1（CAT Ⅲ 600V,POLUTION degreeⅡ）
IEC61557-1, 5(Electronic safety requirements for low voltage distribution system below AC 1000V and DC
1500V)
⚫ Basic Measurement Function
2/3/4- pole earth resistance measurement, Earth resistivity （ρ）calculation
⚫ Earth Resistance Measurement employs AC simulation test, 4-kind of testing frequencies（94Hz, 105Hz, 111Hz,
128Hz）,which are selectable by hand to reduce impacts from low interference sources.
⚫ Auxiliary Earth Resistance Measurement Function
Testing and displaying auxiliary earth resistance.
⚫ Warning Display Function for auxiliary earth resistance upper-limits
Displaying warnings for inaccurate measurements due to high auxiliary earth resistances
⚫ Auto-range Function in Resistance Measurement and >1999 displays for over range.
⚫ Indication Functions for high interference voltage.
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