Earth/Ground Tester

Procedure of Measurements

3.Call display RK with "DISPLAY MENU" button.

4.Implement compensation with "START TEST" button.

The compensation resistance is displayed only for as long as the "START TEST" button is kept pressed. After releasing the "START TEST" button the measured value is stored and the measuring instrument returns to the standard settings at the beginning of the measurement so that a succeeding measurement of the earthing resistance can be implemented by pressing "START TEST" again. Thereafter, RK is subtracted from the actual measured value.

If the compensation value has to be reset to the basic setting (0.000 Ω), the compensation sequence has to be implemented with an open (disconnected) measuring lead or turn the switch to the next position and back.

Measurement of Soil Resistivity

The soil resistivity is the geological and physical quantity for calculation and design of earthing systems. The measuring procedure applied below uses the method developed by Wenner (F.Wenner, A method of measuring earth resis- tivity; Bull. National Bureau of Standards, Bulletin 12 (4), Paper 258, S 478- 496; 1915/16).

1625 EARTH / GROUND TESTER

START TEST

DISPLAY MENU

H/C2

S/P2

 

AC

 

Earth/Ground Resistance 300 k

Resistance

DC Low Resistance 3k

300 k

RA

R

R

2 POLE

4 POLE

 

3 POLE

2 POLE

 

4 POLE

4 POLE

CHANGE

3 POLE

ES/P1

ITEM

 

OFF

SELECT

E/C1

edw020.eps

Figure 16. Measurement of Soil Resistivity

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Fluke 1625 user manual Measurement of Soil Resistivity

1625 specifications

The Fluke 1625 is a versatile and essential tool in the realm of insulation testing, primarily aimed at electricians, maintenance professionals, and equipment specialists. Throughout its design, Fluke has incorporated a range of features and technologies intended to enhance testing efficiency, accuracy, and user experience, making the 1625 a standout choice for those in need of reliable insulation measurement tools.

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The 1625 also boasts an impressive insulation range of up to 4 GΩ, providing the capability to measure insulation resistance accurately across a spectrum of installations. A notable technology integrated into the unit is the automatic discharge function, which ensures that any stored energy in capacitive components is safely released after testing, enhancing the safety of operations.

Furthermore, the Fluke 1625 includes a patented 'Insulation Diagnostic' feature that assists users in identifying problematic areas in an electrical system. This feature helps professionals determine whether insulation is adequate, helping to prevent potential failures, accidental shorts, and system downtimes.

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In conclusion, the Fluke 1625 is a robust and comprehensive insulation tester that incorporates essential features and advanced technologies. With its versatility, safety mechanisms, and user-friendly design, it stands out as an indispensable tool for electrical professionals committed to ensuring system reliability and safety.