Earth/Ground Tester

Description of Functions

Measurement of Earthing Resistance (RE)

The earthing resistance is determined by a 3- or 4-pole current and voltage measurement. The measuring voltage is a square pulse AC voltage with 48 /

20 V and a frequency of 94, 105, 111 or 128 Hz. The frequency can be selected manually or automatically (AFC).

Selective Measurement of Earthing Resistance (RE A)

Measurement of a single earth electrode in a mesh operated (parallel) earthing system. The current flowing through the single earth electrode is measured with an external current transformer.

Resistance Measurement (R~)

The resistance is determined by a 2 pole current and voltage measurement. The measuring voltage is a square pulse AC voltage with 20 V and a frequency of 94, 105, 111 or 128 Hz. The frequency can be selected manually or automati- cally (AFC).

Low Resistance Measurement (RF)

The resistance is determined by DC current and voltage measurement. 2- as well as 4-pole measurement is possible. The short circuit current is > 200 mA. The resistance of both current directions is measured and stored.

Checking for Correct Measuring Connection

The processor checks if the measuring lead is properly connected according to the selected function via isolated, two piece contacts, inside of each 4 mm (ba- nana) input socket, in combination with detection circuitry. A wrong or miss- ing connection is indicated by an optical or acoustical signal.

Beeper

The built in beeper has two functions:

1.Giving messages if set limit values are exceeded.

2.Indicating dangerous conditions or maloperation. Controlling is done by means of the microprocessor.

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Fluke 1625 Selective Measurement of Earthing Resistance RE a, Resistance Measurement R~, Low Resistance Measurement RF

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.