The Fluke 705 Loop Calibrator is a compact and easy to use handheld instrument designed for testing, calibrating and troubleshooting industrial 4 to 20 mA current loops. It combines current measurement, current sourcing, current simulation and DC voltage measurement in a portable instrument for process technicians, maintenance engineers and calibration professionals.

Designed for everyday process instrumentation applications, the Fluke 705 provides the essential functions required to verify transmitters, control system inputs and other devices operating with standard current signals. Its intuitive push button interface, clear display and integrated 24 V loop power supply help technicians perform calibration tasks efficiently in the field.

The Fluke 705 is particularly suitable for industrial plants where reliable 4 to 20 mA loop testing is required as part of routine maintenance, commissioning or troubleshooting.

At europascal, customers benefit from extensive experience in professional calibration technology, measurement equipment and calibration services.

Features and Benefits of the Fluke 705

The Fluke 705 combines important current loop calibration functions in a compact handheld instrument. Its straightforward operation makes it an efficient solution for technicians who regularly work with analog process signals.

The calibrator can measure current, generate a defined current output and simulate a transmitter within an externally powered loop. In addition, the integrated 24 V loop supply can power compatible two wire transmitters during testing.

Important features and benefits include:

Current measurement

The Fluke 705 measures DC current signals used in industrial process loops. This enables technicians to verify the output of pressure, temperature, flow, level and other process transmitters.

Current sourcing

Defined current signals can be generated to test indicators, PLC inputs, controllers and other devices connected to a process loop.

Current simulation

The simulation function allows the Fluke 705 to behave like a two wire transmitter within an externally powered current loop.

24 V loop power

The integrated loop power supply enables compatible transmitters to be powered directly during calibration and troubleshooting.

DC voltage measurement

In addition to current calibration functions, the instrument can measure DC voltage, providing an additional troubleshooting function for process instrumentation.

Automatic stepping and ramping

Automatic output functions simplify testing across the current range and make it easier to evaluate the response of connected equipment.

Accurate 4 to 20 mA Loop Calibration

The Fluke 705 Loop Calibrator is designed around one of the most important standard signals used in industrial process measurement: the 4 to 20 mA current loop.

A current loop is commonly used to transfer measurement values from process transmitters to controllers, PLCs, indicators and data acquisition systems. Reliable operation of these loops is essential for accurate process control.

The Fluke 705 allows technicians to check the current generated by a transmitter and compare it with the expected value for a defined process condition.

Alternatively, the calibrator can generate a known current signal. This allows technicians to test the receiving side of a measurement loop independently from the actual transmitter.

This combination makes the Fluke 705 useful for both calibration and systematic troubleshooting.

Measure, Source and Simulate Current

Current Measurement

In measurement mode, the Fluke 705 measures the current flowing through an industrial process loop.

This function is particularly useful for checking transmitter outputs.

For example, a technician can apply a known pressure or temperature to a process transmitter and use the Fluke 705 to measure the resulting current output.

The measured current can then be compared with the expected value.

Current Sourcing

In source mode, the Fluke 705 generates a defined current output.

This allows the instrument to replace a transmitter temporarily during testing.

A technician can generate specific current values and check whether a connected indicator, controller or PLC displays the correct corresponding process value.

This approach helps identify whether a problem originates from the transmitter, wiring or receiving equipment.

Current Simulation

Current simulation is useful when the existing control loop provides the required supply voltage.

In this operating mode, the Fluke 705 simulates the current output of a two wire transmitter.

This provides additional flexibility when troubleshooting industrial process instrumentation.

Integrated 24 V Loop Power

The Fluke 705 features an integrated 24 V loop power supply for testing compatible process transmitters.

Two wire transmitters normally require an external supply voltage to operate. During maintenance or laboratory testing, this voltage may not always be available.

The Fluke 705 can provide the necessary loop power while measuring the transmitter’s current output.

This reduces the need for additional power supplies and makes the calibration setup more compact.

For mobile maintenance technicians, the integrated loop power function can significantly simplify transmitter testing directly at the installation site.

Automatic Step and Ramp Functions

The Fluke 705 provides automatic stepping and ramping functions for efficient verification of process instrumentation.

The 25% step function enables technicians to move through important points of a standard current range without manually entering each individual output value.

For a 4 to 20 mA loop, these defined points can be used to check the response of connected instrumentation across the measurement range.

Automatic ramping continuously changes the output current. This is useful for observing how indicators, controllers, recorders or other devices respond to a changing process signal.

These functions can be used for:

Checking transmitter and system linearity

Testing analog input channels

Verifying process indicators

Checking alarm and switching points

Testing control system responses

Troubleshooting process loops

Technical Specifications of the Fluke 705

The Fluke 705 provides the essential electrical functions required for industrial current loop calibration.

The applicable accuracy specifications depend on operating conditions and the selected measurement function. The manufacturer’s technical documentation should be consulted for complete specifications.

Ideal for Industrial Calibration Applications

The Fluke 705 Loop Calibrator is designed for technicians working with industrial automation and process measurement systems.

Process Transmitter Calibration

The Fluke 705 can measure the output signals of pressure, temperature, flow and level transmitters.

Combined with its integrated loop power supply, this makes it particularly practical for testing two wire process transmitters.

Control System Testing

Defined current signals can be generated to test analog inputs of PLCs, controllers and other process control systems.

Industrial Maintenance

Technicians can use the Fluke 705 to identify problems in current loops and determine whether a fault is associated with the transmitter, wiring or receiving equipment.

Commissioning

During commissioning, the instrument can be used to verify signal transmission between field instruments and control systems.

Field Calibration

Its compact design and battery powered operation make the Fluke 705 suitable for mobile calibration work directly at industrial measurement points.

Calibration Laboratories

The instrument can also be used as a portable current source and measurement device for routine laboratory applications.

Advantages of the Fluke 705 Loop Calibrator

Simple Operation

The Fluke 705 concentrates on the essential functions required for current loop calibration, helping technicians perform common tests efficiently.

Versatile Current Functions

Measurement, sourcing and simulation modes provide flexibility for different calibration and troubleshooting configurations.

Integrated Loop Power

The built in 24 V supply simplifies the testing of compatible two wire transmitters.

Automatic Testing Functions

Step and ramp functions reduce manual adjustment during systematic loop testing.

Portable Design

The compact housing and battery operation make the instrument suitable for field service and industrial maintenance.

Reliable Measurement Performance

The Fluke 705 provides the measurement performance required for routine verification and calibration of industrial process signals.

Fluke 705 Calibration and Service at europascal

Regular calibration of current loop calibrators is important for maintaining confidence in measurement and sourcing results.

europascal provides professional calibration solutions and services for electrical measurement equipment, process calibrators and other industrial measuring instruments.

A calibrated Fluke 705 can help companies maintain traceability, document measurement performance and identify deviations before they affect important process measurements.

Discover the professional europascal calibration service for reliable calibration of your measurement and calibration equipment.

europascal also supports customers in selecting appropriate calibration equipment for industrial maintenance, production and laboratory applications.

Why Choose the Fluke 705?

The Fluke 705 Reliable Loop Calibrator provides the essential functionality required for professional 4 to 20 mA current loop calibration in a compact handheld instrument.

Its ability to measure, source and simulate current signals makes it suitable for both transmitter calibration and control system testing. The integrated 24 V loop power supply further simplifies work with compatible two wire transmitters.

Automatic step and ramp functions help technicians test process instrumentation efficiently across the operating range, while DC voltage measurement provides an additional tool for troubleshooting.

For maintenance technicians, calibration professionals and industrial users looking for a straightforward current loop calibrator, the Fluke 705 provides a practical solution for everyday measurement tasks.

Looking for the Fluke 705 or professional calibration services? Contact europascal today for expert advice, product availability, pricing and calibration options tailored to your requirements.

You can find more products from Fluke Calibration here.

Discover our professional europascal calibration service for reliable and traceable calibration of your measurement and calibration equipment.

For manufacturer information about the Fluke 705, visit the official Fluke website.

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