The Fluke Calibration 707Ex is a compact, intrinsically safe loop calibrator designed for measuring, sourcing and simulating current signals in potentially explosive industrial environments.
With a current accuracy of ±(0.015% of reading + 2 digits) and a resolution of 0.001 mA, the Fluke Calibration 707Ex provides reliable performance for testing and calibrating industrial process instrumentation.
The instrument is designed for use in hazardous areas and carries ATEX certification for Zones 1 and 2.
Its compact construction, large display and convenient Quick Click rotary control allow technicians to perform calibration procedures efficiently with one hand.
The Fluke Calibration 707Ex is particularly suitable for calibrating current loops, checking process transmitters and verifying control system signals.
For professional electrical calibration and metrological traceability, visit the europascal Calibration Service.
Your Benefits at a Glance
The Fluke Calibration 707Ex combines accurate electrical measurement with practical functions for industrial maintenance and calibration.
Key benefits include:
- Intrinsically safe design for hazardous environments
- ATEX certification for Zones 1 and 2
- Current measurement from 0 to 24 mA
- Current sourcing and simulation for 0 to 20 mA and 4 to 20 mA signals
- Current accuracy of ±(0.015% of reading + 2 digits)
- High current resolution of 0.001 mA
- DC voltage measurement from 0 to 28 V
- Integrated 24 V loop power supply
- Simultaneous display of current and percentage of span
- Convenient Quick Click rotary control
- Automatic step and ramp functions
- Selectable 25% output steps
- Integrated span check function
- HART compatible loop resistance
- Compact handheld design
- Operation with a standard 9 V battery
- Protective holster with integrated stand
- NIST traceable manufacturer calibration data
Intrinsically Safe Design for Hazardous Areas
The Fluke Calibration 707Ex is specifically designed for use in potentially explosive atmospheres.
The instrument is certified according to the ATEX directive.
Its explosion protection marking is:
II 2 G Ex ia IIC T4
This certification allows the instrument to be used in suitable applications within hazardous Zones 1 and 2, provided all applicable operating conditions are observed.
The intrinsically safe design is particularly important for technicians working in industries where flammable gases or vapors may be present.
Typical applications include chemical plants, refineries, petrochemical facilities and industrial process installations.
The Fluke Calibration 707Ex allows technicians to perform electrical loop measurements without using conventional, non-certified calibration instruments in hazardous areas.
The applicable certification documents, connection parameters and safety instructions must always be observed.
Accurate Current Measurement
The Fluke Calibration 707Ex measures DC current signals over a range of:
0 to 24 mA
The manufacturer specifies a resolution of:
0.001 mA
This corresponds to 1 µA.
The current measurement accuracy is:
±(0.015% of reading + 2 digits)
This high measurement resolution allows technicians to identify small deviations in industrial current loops.
Current measurement is particularly important when checking process transmitters and control system signals.
The instrument can measure the actual loop current and display the result directly.
Current Sourcing and Simulation
The Fluke Calibration 707Ex provides current sourcing and simulation functions.
Supported nominal current ranges include:
0 to 20 mA
and
4 to 20 mA
These functions allow the instrument to generate defined current signals for testing industrial measurement and control systems.
In source mode, the calibrator generates the required current signal using its internal power supply.
In simulation mode, the instrument controls the current in a loop powered by a suitable external source.
This distinction is important when selecting the correct calibration procedure.
Current sourcing and simulation can be used to verify indicators, controllers, recorders and other instruments with current inputs.
The specified current accuracy is:
±(0.015% of reading + 2 digits)
Integrated 24 V Loop Power Supply
The Fluke Calibration 707Ex includes an integrated 24 V loop power supply.
This allows compatible two-wire transmitters to be powered while their output current is measured.
The integrated loop supply simplifies field calibration procedures.
An additional external power supply is not required for suitable applications.
This is particularly useful when checking transmitters that have been disconnected from their normal process control system.
The integrated loop supply must be used within the manufacturer’s electrical and intrinsic safety limitations.
DC Voltage Measurement
In addition to current measurement, the Fluke Calibration 707Ex can measure DC voltage.
The voltage measurement range is:
0 to 28 V DC
The voltage resolution is:
0.001 V
The specified accuracy is:
±(0.015% of reading + 2 digits)
This function allows technicians to verify loop supply voltages and troubleshoot industrial process instrumentation.
Voltage measurement is particularly useful when checking whether a transmitter receives the required supply voltage.
The Fluke Calibration 707Ex measures DC voltage but does not provide a programmable DC voltage source.
Quick Click Rotary Control
The Fluke Calibration 707Ex features an innovative Quick Click rotary control.
This allows technicians to adjust current output values quickly and precisely.
The control is designed for convenient one-handed operation.
This is particularly useful when performing calibration work in industrial environments where access to instruments may be restricted.
The combination of rotary control and push buttons simplifies operation and reduces the number of manual adjustments required during calibration.
Simultaneous Current and Percentage Display
The Fluke Calibration 707Ex displays the current value and the corresponding percentage of the selected measurement span.
This makes it easy to interpret current signals during calibration.
For a standard 4 to 20 mA loop, the following values apply:
| Current | Percentage of Span |
|---|---|
| 4 mA | 0% |
| 8 mA | 25% |
| 12 mA | 50% |
| 16 mA | 75% |
| 20 mA | 100% |
This function simplifies the verification of industrial transmitters and control system inputs.
Technicians can immediately identify whether the measured or generated current corresponds to the expected percentage of span.
Automatic Step Functions
The Fluke Calibration 707Ex provides automatic and manual current stepping functions.
The instrument supports convenient 25% steps.
For a standard 4 to 20 mA loop, these steps correspond to:
- 4 mA
- 8 mA
- 12 mA
- 16 mA
- 20 mA
These predefined values simplify linearity checks.
They allow technicians to verify the response of indicators, controllers and other current measurement devices at several points.
Automatic stepping can reduce the time required for routine calibration procedures.
Automatic Ramp Functions
The Fluke Calibration 707Ex includes selectable ramp functions.
Available operating modes include slow ramp, fast ramp and step ramp.
These functions allow the instrument to generate changing current signals automatically.
Ramp functions are useful for checking the response of control systems and process indicators.
They can also support functional testing of valve positioners and other instruments controlled by current signals.
The automatic ramp functions help technicians perform repetitive tests without continuously adjusting the output manually.
Span Check Function
The Fluke Calibration 707Ex includes a dedicated span check function.
This allows technicians to switch quickly between the minimum and maximum values of the selected current range.
For a standard 4 to 20 mA loop, these values are:
4 mA and 20 mA
The function simplifies verification of zero and span.
It is particularly useful during commissioning, preventive maintenance and troubleshooting.
HART Compatible Loop Resistance
The Fluke Calibration 707Ex includes a resistance suitable for use with HART communication equipment.
The resistance is connected in series with the loop supply.
This provides the required loop impedance for compatible HART communicators.
The instrument itself is not a HART communicator.
However, its integrated resistance supports the use of suitable external HART communication devices.
This is useful when maintaining intelligent process transmitters.
Compact Handheld Construction
The Fluke Calibration 707Ex is designed for portable use.
Its dimensions are approximately:
152 × 70 × 41 mm
The instrument weighs approximately:
224 g without the protective holster
The compact construction allows technicians to carry the calibrator easily between measurement locations.
The instrument is supplied with a protective holster that includes an integrated stand.
This provides additional protection during everyday industrial use.
Battery Operation
The Fluke Calibration 707Ex operates using a standard 9 V alkaline battery.
Battery operation makes the instrument independent of external power supplies for normal measurement and current generation functions.
The battery can be replaced without breaking the calibration seal.
For hazardous area applications, only battery types and replacement procedures permitted by the manufacturer’s safety instructions may be used.
Calibration of 4 to 20 mA Current Loops
One of the main applications of the Fluke Calibration 707Ex is the calibration of industrial 4 to 20 mA current loops.
These loops are widely used in process automation.
A current signal represents a measured process variable such as pressure, temperature, level or flow.
The Fluke Calibration 707Ex can generate defined current values to verify the response of connected instruments.
It can also measure current signals generated by transmitters.
This allows technicians to identify deviations and verify correct signal transmission.
Temperature Transmitter Testing
The Fluke Calibration 707Ex is suitable for checking the electrical output of temperature transmitters.
Many temperature transmitters convert signals from RTDs or thermocouples into standardized current signals.
The Fluke Calibration 707Ex can measure the transmitter output current.
When used together with a suitable temperature simulator or temperature source, it can support the calibration of the complete transmitter measurement chain.
The Fluke Calibration 707Ex does not directly simulate RTD resistance or thermocouple voltage.
A suitable additional calibration instrument is required for these functions.
Pressure Transmitter Testing
The Fluke Calibration 707Ex can also be used when calibrating pressure transmitters.
Pressure transmitters commonly provide 4 to 20 mA output signals.
The instrument can measure these signals while a suitable pressure reference and pressure source are used to apply defined pressure values.
This allows technicians to compare the transmitter output with the expected current signal.
The Fluke Calibration 707Ex does not generate or measure pressure.
It provides the electrical measurement functions required for checking the transmitter output.
Technical Highlights
| Specification | Fluke Calibration 707Ex |
|---|---|
| Manufacturer | Fluke Calibration |
| Model | 707Ex |
| Product type | Intrinsically Safe Loop Calibrator |
| Current measurement | 0 to 24 mA |
| Current sourcing | 0 to 20 mA or 4 to 20 mA |
| Current simulation | 0 to 20 mA or 4 to 20 mA |
| Current resolution | 0.001 mA |
| Current accuracy | ±(0.015% of reading + 2 digits) |
| Source drive capability | 700 Ω at 20 mA |
| Loop power supply | 24 V |
| DC voltage measurement | 0 to 28 V |
| Voltage resolution | 0.001 V |
| Voltage accuracy | ±(0.015% of reading + 2 digits) |
| Display | Current and percentage of span |
| Step function | 25% steps |
| Ramp functions | Slow, fast and step |
| Span check | Yes |
| HART compatible resistance | Yes |
| ATEX marking | II 2 G Ex ia IIC T4 |
| Hazardous area classification | Zones 1 and 2 |
| Operating temperature | −10 °C to +55 °C |
| Storage temperature | −40 °C to +60 °C |
| Maximum voltage | 30 V |
| Power supply | One 9 V alkaline battery |
| Dimensions | 152 × 70 × 41 mm |
| Weight | Approximately 224 g |
| Weight with holster | Approximately 350 g |
| Manufacturer calibration | NIST traceable |
| Product status | Discontinued by manufacturer |
Calibration Service by europascal
Regular calibration is essential for maintaining reliable and traceable electrical measurements.
europascal provides professional calibration services for electrical measuring instruments and calibration equipment.
When the Fluke Calibration 707Ex is used as a reference instrument, its measurement performance and calibration status should be verified regularly.
Relevant calibration parameters include:
- DC current measurement accuracy
- DC current sourcing accuracy
- DC current simulation accuracy
- DC voltage measurement accuracy
- Current resolution
- Measurement repeatability
The measurement uncertainty should be evaluated according to the applicable calibration procedure.
For professional calibration services and metrological traceability, visit the europascal Calibration Service.
Why Choose the Fluke Calibration 707Ex?
The Fluke Calibration 707Ex combines accurate electrical measurement with an intrinsically safe design.
Its ATEX certification makes it suitable for defined applications in potentially explosive environments.
The instrument provides current measurement, sourcing and simulation functions for industrial current loops.
An accuracy of ±(0.015% of reading + 2 digits) and a resolution of 0.001 mA support precise electrical calibration.
The integrated 24 V loop power supply simplifies transmitter testing.
Automatic step and ramp functions reduce the time required for routine calibration procedures.
The Quick Click rotary control allows convenient one-handed operation.
Its compact dimensions and low weight make the instrument suitable for mobile maintenance and field calibration.
For technicians working with industrial process instrumentation in hazardous areas, the Fluke Calibration 707Ex provides a practical solution for current loop calibration and troubleshooting.
Typical Applications for the Fluke Calibration 707Ex
Typical applications include:
- 4 to 20 mA loop calibration
- Current loop troubleshooting
- Process transmitter testing
- Temperature transmitter calibration
- Pressure transmitter calibration
- Level transmitter testing
- Flow transmitter testing
- Control system input verification
- Industrial process automation
- Chemical processing plants
- Petrochemical facilities
- Oil and gas installations
- Hazardous area maintenance
- Preventive maintenance
- Industrial commissioning
- Electrical calibration laboratories
- Field calibration
- Industrial quality assurance
The combination of intrinsic safety, accurate current measurement and convenient operation makes the Fluke Calibration 707Ex a professional instrument for demanding industrial calibration applications.
Find more Fluke Calibration products here.
Manufacturer information for the Fluke Calibration 707Ex can be found on the official Fluke website.
