1625

Users Manual

 

1625 EARTH / GROUND TESTER

 

 

START

 

 

H/C2

 

 

TEST

 

 

 

 

 

DISPLAY

 

 

S/P2

 

 

MENU

 

 

 

 

 

 

AC

 

 

 

 

Earth/Ground Resistance 300 k

Resistance

DC Low Resistance 3k

 

 

 

300 k

 

 

 

RA

R

R

 

 

 

4 POLE

2 POLE

 

 

 

 

 

2 POLE

 

 

 

3 POLE

 

 

 

 

4 POLE

 

4 POLE

 

 

CHANGE

3 POLE

 

ES/P1

 

 

ITEM

 

 

 

 

 

OFF

 

 

 

 

SELECT

 

 

E/C1

 

 

 

 

 

 

 

Auxiliary

 

 

 

 

 

earth

 

 

 

Earth

Probe

electrode

 

 

 

electrode

 

 

 

 

 

>20 m

>20 m

 

 

 

 

 

 

edw010.eps

Figure 7. Measurement of Interference - Voltages and Frequencies

Measurement of Earthing Resistances

This instrument is equipped with a 3 pole as well as a 4 pole resistance meas- urement which renders measurements of resistances of earthing systems possi- ble, as well as measurements of the soil resistivity of geological strata. A spe- cific description of the different applications is given further on in this manual. As a special function, the instrument offers measurements with an external current transformer, with which a measurement of single resistance branches in interlinked networks (lightning protection and high voltage pylons with ca- bling) can be performed without seperating parts of the system.

To ensure most feasible interference suppression during measurements, the instrument is equipped with 4 measuring frequencies (94 Hz, 105 Hz,

111 Hz, 128 Hz), with automatic switch over if necessary (AFC - Automatic Frequency Control). The corresponding measuring frequency used for a spe- cific measurement can be called and displayed with "DISPLAY MENU" after the measurement. Additionally, one of the four measuring frequencies can be selected and permanently set in special cases. In that case, in order to stabilize the display, an average measurement can be carried out for up to 1 minute by keeping the ”START TEST" button pressed.

To determine the earthing impedance (R*) a measurement with a frequency close to the mains frequency (55 Hz) is carried out. At the activation of R* through user's code, this measuring frequency is activated automatically.

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Fluke 1625 user manual Measurement of Earthing Resistances, Measurement of Interference Voltages and Frequencies

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.

One of the key features of the Fluke 1625 is its ability to perform insulation resistance testing with several voltage settings. The device offers test voltages of 250V, 500V, and 1000V, making it adaptable for different applications, including low-voltage and high-voltage systems. This flexibility is paramount in ensuring that technicians can perform tests on a wide variety of electrical systems without needing multiple devices.

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.

In addition to insulation resistance testing, the Fluke 1625 also supports other functionalities, including continuity testing and low-resistance measurements. This multi-functional capability streamlines operations, allowing technicians to conduct multiple tests without switching devices, resulting in increased productivity.

The device is designed with user-friendliness in mind, featuring an intuitive interface complete with large buttons and a clear display. This makes it easier for users to navigate through different testing modes and review results. To further enhance usability in challenging environments, the 1625 has a rugged, durable design, ensuring it can withstand the rigors of job sites.

Another significant characteristic of the Fluke 1625 is its ability to log test results for further analysis. It can store up to 99 datasets, which can be later reviewed or downloaded for reporting purposes. This data management capability is crucial for maintaining records, fulfilling compliance requirements, and improving operational efficiencies.

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.