The Fluke 726 is a high-precision multifunction process calibrator designed for demanding calibration, maintenance and troubleshooting applications in industrial process instrumentation.

Combining accurate measurement and signal generation in a compact handheld instrument, the Fluke 726 allows technicians to calibrate temperature transmitters, pressure transmitters, flowmeters, process indicators and other industrial measurement equipment.

With basic DC measurement accuracy down to 0.01%, two independent measurement and source channels, integrated 24 V loop power and comprehensive temperature calibration functions, the Fluke 726 provides exceptional versatility for professional field calibration.

The instrument measures and sources electrical process signals, simulates resistance temperature detectors and thermocouples, and supports pressure calibration when connected to compatible external Fluke pressure modules.

Advanced functions such as automatic stepping, ramp generation, transmitter error calculation and storage of calibration results simplify routine calibration procedures.

The Fluke 726 is particularly suitable for maintenance technicians, calibration laboratories, process engineers and industrial quality assurance departments.

europascal supports professional users with high-quality calibration equipment, technical advice and reliable metrological services.

For additional information about traceable calibration, visit the europascal Calibration Service.

Your Benefits at a Glance

The Fluke 726 combines multiple calibration functions in one portable instrument.

Its main advantages include:

• High-precision multifunction process calibration
• Basic DC accuracy down to 0.01%
• Two independent measurement and source channels
• Simultaneous measurement and signal generation
• DC voltage measurement up to 30 V
• DC voltage generation up to 20 V
• Current measurement and generation up to 24 mA
• Integrated 24 V loop power supply
• Resistance measurement up to 4000 Ω
• RTD measurement and simulation
• Thermocouple measurement and simulation
• Frequency measurement and generation
• Pressure calibration with compatible external pressure modules
• Integrated pressure switch testing
• Automatic step and ramp functions
• Transmitter error calculation in percent
• Storage of up to eight calibration results
• Storage of frequently used instrument settings
• Configurable RTD calibration coefficients
• HART-compatible mode with selectable 250 Ω resistance
• Backlit display for industrial environments
• Portable battery-powered design
• Three-year manufacturer warranty

Ideal for Demanding Calibration Applications

The Fluke 726 multifunction process calibrator is designed for industrial applications requiring accurate measurement and simulation of different process variables.

Instead of using several separate instruments, technicians can perform multiple calibration tasks with one handheld device.

Typical applications include calibration of temperature transmitters, pressure transmitters, process indicators, control valves and frequency-based measurement systems.

The instrument is particularly useful in chemical plants, pharmaceutical manufacturing, energy production, food processing and industrial automation.

Its dual-channel design allows technicians to generate an input signal while simultaneously measuring the output of the device under test.

This functionality is especially valuable when calibrating transmitters that convert a physical measurement variable into a standardized electrical signal.

For example, a temperature transmitter can be tested by simulating an RTD or thermocouple input while measuring its corresponding 4–20 mA output.

The Fluke 726 therefore provides an efficient solution for calibration and troubleshooting directly at the installation site.

High-Precision Measurement and Signal Generation

The Fluke 726 provides accurate measurement and generation of electrical process signals.

For DC voltage and current functions, the manufacturer specifies basic accuracy down to 0.01% of reading, with additional fixed terms depending on the selected range.

The instrument supports voltage measurement up to 30 V and voltage generation up to 20 V.

DC current can be measured, generated or simulated over a range extending to 24 mA.

These functions allow the Fluke 726 to test industrial transmitters, indicators, controllers and other process instruments.

The ability to measure and generate signals using separate channels reduces the need for additional measurement equipment.

The exact accuracy depends on the selected measurement function and range.

Calibration of 4–20 mA Process Signals

The Fluke 726 is particularly suitable for calibrating industrial current loops.

The 4–20 mA signal is widely used in process instrumentation because it allows measurement information to be transmitted reliably over long cable distances.

The calibrator can measure current signals and generate defined current values for testing process indicators and control systems.

Typical calibration points include 4 mA, 8 mA, 12 mA, 16 mA and 20 mA.

These correspond to 0%, 25%, 50%, 75% and 100% of a standard linear measurement range.

The integrated transmitter error calculation simplifies the evaluation of deviations between expected and measured signals.

Automatic stepping and ramp functions can be used to check the linearity and response of connected instruments.

Integrated 24 V Loop Power Supply

The Fluke 726 includes an integrated 24 V DC loop power supply.

This allows technicians to supply compatible two-wire transmitters during calibration.

The instrument can provide loop power while simultaneously measuring the transmitter current.

This eliminates the need for a separate power supply in many field applications.

The function is particularly useful when testing transmitters that have been disconnected from their normal process control system.

Technicians can connect the transmitter directly to the calibrator and verify its electrical output.

RTD Measurement and Simulation

The Fluke 726 supports the measurement and simulation of resistance temperature detectors.

RTDs are widely used for accurate temperature measurement in industrial processes.

The calibrator supports common platinum resistance thermometer characteristics and additional RTD types.

It also allows users to enter custom RTD calibration coefficients.

This is particularly useful when working with individually calibrated resistance thermometers.

In simulation mode, the Fluke 726 reproduces the electrical resistance corresponding to a selected temperature.

This allows RTD transmitters and temperature indicators to be calibrated without connecting a physical temperature sensor.

In measurement mode, the instrument evaluates the resistance of a connected RTD and displays the corresponding temperature.

The supported temperature range depends on the selected RTD characteristic.

Thermocouple Measurement and Simulation

The Fluke 726 also supports thermocouple measurement and simulation.

Supported thermocouple types include common industrial characteristics such as J, K, T, E, N, R, S and B, as well as additional types.

Thermocouples are frequently used for temperature measurement in industrial furnaces, heating systems, process plants and manufacturing equipment.

The Fluke 726 can measure thermocouple signals and convert them into temperature values.

It can also generate thermocouple-equivalent signals to test temperature transmitters and indicators.

This allows the electrical temperature measurement chain to be verified without requiring an external temperature source.

For accurate thermocouple calibration, the reference junction compensation and the selected thermocouple characteristic must be considered.

Pressure Calibration with External Modules

The Fluke 726 supports pressure measurement and calibration when connected to compatible external Fluke pressure modules.

Pressure modules are available for different pressure types and measurement ranges.

Depending on the selected module, the system can be used for gauge, differential, absolute and vacuum pressure measurements.

The pressure measurement accuracy depends on the connected pressure module.

The Fluke 726 can simultaneously measure pressure and generate or measure electrical signals.

This is particularly useful when calibrating pressure transmitters with 4–20 mA outputs.

For example, a defined pressure can be applied using an external pressure source while the transmitter output is measured.

Important: The Fluke 726 does not contain an integrated pressure generator. Pressure modules and suitable pressure sources are required separately.

Integrated Pressure Switch Testing

The Fluke 726 includes a pressure switch test function.

This function allows technicians to determine the switching characteristics of pressure switches.

The instrument can record the switching point and reset point.

The difference between these values represents the switching deadband.

This functionality is particularly useful during maintenance and commissioning of industrial pressure switches.

A compatible external pressure module and pressure source are required.

Frequency Measurement and Generation

The Fluke 726 supports frequency measurement and signal generation.

Frequency signals are commonly used in flow measurement, rotational speed measurement and industrial automation.

The calibrator can generate defined frequency signals for testing compatible instruments.

It can also measure frequency signals from connected devices.

Additional frequency functions support flowmeter testing, including frequency totalization and pulse train generation.

These capabilities make the Fluke 726 suitable for checking frequency-based process instrumentation.

Automatic Step and Ramp Functions

The Fluke 726 includes automatic step and ramp functions.

These functions simplify repetitive calibration procedures.

Automatic stepping allows the calibrator to generate predefined signal levels.

This is particularly useful when testing transmitters and indicators at multiple calibration points.

Ramp generation produces a continuously changing output signal.

This allows technicians to observe the response of connected instruments over a defined measurement range.

Both functions help reduce manual operation and improve calibration efficiency.

Transmitter Error Calculation

The Fluke 726 can calculate transmitter error directly.

This allows technicians to evaluate calibration results without using an external calculator.

The instrument compares the expected transmitter output with the measured value.

The deviation can be displayed as a percentage.

This simplifies the evaluation of transmitter performance during maintenance and calibration.

The function is particularly useful when testing linear 4–20 mA transmitters.

Storage of Calibration Results

The Fluke 726 can store up to eight calibration results.

This allows technicians to record measurement information during field calibration.

Stored results can be reviewed later for analysis.

The instrument also supports storage of frequently used measurement configurations.

This reduces setup time when performing recurring calibration tasks.

The Fluke 726 is not a full documenting process calibrator with integrated HART communication.

For applications requiring more extensive documentation and HART communication, the Fluke 754 provides additional functionality.

HART-Compatible Measurement Mode

The Fluke 726 includes a selectable 250 Ω resistance for compatibility with HART instrumentation.

This function can be useful when measuring or generating current signals in HART-equipped process loops.

However, the Fluke 726 does not provide integrated HART communication or device configuration functions.

A separate HART communicator is required when digital communication with HART devices is necessary.

Technical Highlights

Calibration Service by europascal

Regular calibration is essential for maintaining reliable and traceable process measurements.

europascal supports industrial customers with professional calibration equipment and calibration services for electrical, pressure and temperature measurement instruments.

The Fluke 726 combines several measurement functions in one device. Consequently, the relevant calibration procedure must consider the individual measurement ranges and functions.

Important calibration parameters include DC voltage measurement and generation, DC current measurement and generation, resistance measurement and simulation, thermocouple measurement and simulation, and frequency measurement and generation.

When external pressure modules are used, their individual calibration and measurement uncertainty must also be considered.

The manufacturer’s accuracy specifications must not be confused with the expanded measurement uncertainty stated on a calibration certificate.

For professional metrological services and traceable calibration, visit the europascal Calibration Service.

Why Choose the Fluke 726?

The Fluke 726 combines accurate electrical measurement, signal generation and process calibration functions in one compact handheld instrument.

Its two independent channels allow simultaneous measurement and simulation of process signals.

The basic accuracy of 0.01% makes it suitable for demanding industrial calibration applications.

Integrated RTD and thermocouple functions allow technicians to test temperature transmitters without requiring separate temperature simulation instruments.

Compatibility with external pressure modules extends the instrument’s capabilities to pressure calibration.

The integrated 24 V loop power supply simplifies testing of two-wire transmitters.

Automatic stepping, ramp generation and transmitter error calculation reduce manual work during calibration.

The ability to store calibration results and frequently used settings further improves efficiency.

For industrial maintenance technicians, calibration laboratories and process engineers, the Fluke 726 provides a versatile and reliable solution for professional process calibration.

Typical Calibration Applications with the Fluke 726

The Fluke 726 is suitable for a wide range of industrial calibration applications.

Typical applications include calibration of pressure transmitters, temperature transmitters, process indicators, RTDs, thermocouples, frequency-based flowmeters and control system inputs.

The instrument can also be used for testing current loops, checking transmitter linearity and troubleshooting industrial measurement systems.

Its portable construction makes it particularly suitable for maintenance work directly at the installation site.

In calibration laboratories, the Fluke 726 can be used as a multifunction electrical reference and signal source for process instrumentation.

The combination of accurate measurement functions, signal simulation, pressure module compatibility and automated test functions makes the Fluke 726 an efficient solution for industrial calibration and maintenance.

Find more Fluke Calibration products here.

Manufacturer information for the Fluke 726 can be found on the official Fluke website.

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