A Reliable 4-20 mA Loop Calibrator for Industrial Maintenance
The Fluke 707 Current Loop Calibrator is designed for instrumentation engineers and maintenance technicians who need a simple and accurate solution for testing and calibrating current loops.
In industrial automation systems, many field instruments such as pressure transmitters, temperature transmitters, flow transmitters, and control valves use 4-20 mA signals to communicate measurement information. When a loop problem occurs, technicians need a reliable tool to determine whether the issue comes from the transmitter, wiring, power supply, or control system.
The Fluke 707 combines current measurement, current sourcing, and current simulation functions in one compact handheld device, allowing engineers to perform loop checks and transmitter troubleshooting more efficiently.
Complete 4-20 mA Signal Testing Capability
The Fluke 707 supports the essential functions required for current loop maintenance:
Measure mA signals
Source 0-20 mA or 4-20 mA outputs
Simulate transmitter current output
Verify analog input response
Perform loop troubleshooting
With 0.015% mA accuracy and 1 μA resolution, it provides the precision required for industrial instrumentation calibration tasks.
Built-In 24 V Loop Power for Transmitter Testing
Many industrial transmitters require an external power supply during testing.
The Fluke 707 includes an internal 24 V loop supply, allowing technicians to power and measure transmitters at the same time without carrying an additional power source.
This makes it especially useful for:
New transmitter installation checks
Field troubleshooting
Offline instrument testing
Control loop verification
Fast Calibration with One-Hand Operation
Field calibration often requires technicians to hold test leads, connect instruments, and adjust output values simultaneously.
The Fluke 707 features a Quick Click rotary knob and a large display designed for easy one-handed operation.
Useful functions include:
Simultaneous mA and % of span display
25% step output adjustment
0-100% span check
Selectable ramp and step outputs
These features help technicians complete loop checks faster and reduce setup time.
HART-Compatible Loop Testing
Modern smart transmitters often use HART communication over traditional 4-20 mA loops.
The Fluke 707 includes a 250 Ω HART-compatible resistance in the loop supply, allowing compatibility with HART communicators during common transmitter testing applications.
This makes it suitable for maintaining many HART-enabled field devices without adding external loop resistance.
Designed for Process Instrument Applications
The Fluke 707 is optimized for everyday instrumentation maintenance rather than complex documenting calibration tasks.
Typical applications include:
Pressure transmitter loop checks
Temperature transmitter testing
Flow transmitter verification
Control valve signal testing
PLC/DCS analog input troubleshooting
It is widely used in industries such as:
Oil & gas
Chemical processing
Power generation
Water treatment
Pharmaceutical manufacturing
Compact and Durable Field Design
The Fluke 707 is built for technicians who need a portable calibration tool that can be carried directly to the equipment location.
Key advantages include:
Compact handheld design
Protective holster with test lead storage
Replaceable 9 V battery
Rugged construction for industrial environments
Simple interface with minimal setup
FAQ
What is the Fluke 707 used for?
The Fluke 707 is a current loop calibrator used for testing, repairing, and maintaining industrial 4-20 mA loops, transmitters, and analog control systems.
Can Fluke 707 calibrate pressure transmitters?
Yes. The Fluke 707 can verify the electrical output of pressure transmitters by measuring and simulating 4-20 mA signals. For complete pressure calibration, it can be combined with compatible pressure measurement equipment.
What is the difference between Fluke 707 and Fluke 789?
The Fluke 707 is a dedicated current loop calibrator focused on 4-20 mA testing.
The Fluke 789 ProcessMeter combines loop calibration functions with a full True-RMS digital multimeter, allowing additional electrical troubleshooting tasks.
Does Fluke 707 provide loop power?
Yes. The Fluke 707 includes a built-in 24 V loop supply, allowing technicians to power and test transmitters during maintenance.
Can Fluke 707 work with HART transmitters?
Yes. The Fluke 707 includes HART-compatible loop resistance, allowing use with HART communication devices in suitable applications.
Is Fluke 707 suitable for beginners?
Yes. Compared with advanced documenting calibrators, the Fluke 707 has a simpler interface focused on the most common industrial loop testing tasks, making it easier for technicians who mainly work with 4-20 mA systems.
