Fluke 1625 Safety Control Measurements, Measurement of Interference Voltages and Frequen- cies

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Earth/Ground Tester

Procedure of Measurements

Safety Control Measurements

Before each measurement the instrument automatically checks the measuring conditions and, while simultaneously displaying the kind of error, prevents measurements from being started under the following conditions:

•excessive voltage on the sockets (> 24 V in RE and R~; > 3 V in RF)

•wrong or incomplete connection

•Problems during the measuring sequence (display "E1 ... E5") see display description in the section ‘Procedure of Measurements’.

•Battery voltage too low ( display LO-BAT )

Measurement of Interference - Voltages and Frequen- cies

This measuring function detects possible interference voltages and their fre- quencies. This function is automatically active in every switch position before an earthing or resistance measurement. If the pre-set limit values are exceeded, the interference voltage is indicated as too high and a measurement automati- cally prevented .The frequency of an interference voltage is only measurable if the level of this intereference voltage is higher than 1 V. See Figure 7.

Bring central rotary switch in desired position, read out measured value of in- terference voltage, measured value of interference frequency is displayed with "DISPLAY".

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Contents 1625 Limited Warranty and Limitation of Liability Table of Contents 1625 List of Tables 1625 List of Figures 1625 Introduction Earth/Ground TesterDisplays the Fluke 1625 Earth/Ground Tester Lists the models and accessories Models and AccessoriesSafety Instructions Checking the Scope of Delivery SetupQualified Staff UnpackingGeneral Additional AccessoriesDescription of Functions AssemblyMeasurement of Interference Frequency FST Measurement of Interference Voltage USTLow Resistance Measurement RF Measurement of Earthing Resistance RESelective Measurement of Earthing Resistance RE a Resistance Measurement R~LO-BAT SpecificationsSpecifications 1625 Measurement of Interference Voltage DC + AC UST Measurement of Interference Frequency F STEarthing Resistance R E Ence Quan Fied Operating Code Relevant 100% RH with Umeas = 48 RH with Umeas = 20 Resolution RH RS + 2000Ω ⋅1.25 ⋅10−6 % + 5digits Selective Measurement of the Earthing Resistance REA+2 digit KΩ .. .99 kΩ 10 Ω 30.0 kΩ .. .9 kΩ 100 Ω Resistance Measurement RF Compensation of Lead Resistance RK Illustrates the operating elements described below Description of the Operating ElementsDo not open or close the instrument with force Display Elements Description of Display ElementsEfgh Procedure of MeasurementsStandard mode Power on FunctionsActivation of display illumination OperationControl Loop Control Loop See Compensation of Earth Electrode Connecting Lead Checking of Correct Measuring Connection Socket Alloca- tion Measurement of Interference Voltages and Frequen- cies Safety Control MeasurementsMeasurement of Interference Voltages and Frequencies Measurement of Earthing ResistancesEarthing Resistances Measurement Method Pole/4-pole Measurement of Earthing ResistanceRemarks for the setting of earth spikes Evaluation of measured value RE1 20 m Remarks for the Setting of Earth Spikes Measurements on High Voltage Pylons Accordingly, these equivalent resistances are displayed as RE = Measuring Earthing Impedance with 55 Hz R Correcting Clip-on Transformer ErrorsWithclip − ontransformer Compensation of Earth Electrode Connecting Lead Compensation of Earth Electrode Connecting LeadMeasurement of Soil Resistivity Measurement of Soil Resistivity= 2π .a.RE Restivity Soil Distances of Probe Resistance Measurement R~ Measurement of ResistancesResistance Measurement RF Resistance Measurement RFEvaluation of Measured Value Compensation of Measuring Lead ResistanceCompensation of Measuring Lead Resistance Changing of All Data Settings with Personalized CodeFunction Parameter Setting range Standard Presetting Storing a Code Deleting a Code Description of Displays Function Condition Description of DisplaysFunction Displays Condition Too high 2nd aux ON/OFF No reactions to button control etc EE Prom Care and MaintenanceReplacing Batteries Care and MaintenanceStorage RecalibrationIntroduction Stakeless Earth/Ground Resistance TestingComply with DIN ISO Purpose Principle of Operation= R X + Is a reasonable approximation Operation Erder 10 cm Settings on the TesterApplications Lightning Protection Footing ground Significance Description of DisplaysDisplay Significance Earthing Resistance Earthing Resistance = 1 m Soil Resistivity ρEJan July Dec Month Measuring Method Potential Gradient Area US1 Earth Impedance R* on High Voltage Transmission Lines 1625

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.
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