Milliamp mA Loop Calibrators

Fluke 707 Loop Calibrator delivers fast, one-handed, push-button loop checks

The Fluke 707 loop calibrator is a high performance solution for calibration, repair, and maintenance of current loops. It combines the best features of a push-button and knob-base loop calibrator, for extremely fast and easy calibration. The large display and simple quick click rotary button lets you make quick selections and adjustments with one hand. Plus, features such as mA sourcing, simulation, and measurement; simultaneous display of mA and % of span, and selectable step or ramp outputs, helps you work more efficiently and accurately. And you can quickly change the 9V battery without breaking the calibration seal.

Other useful features:

• Includes HART® compatible resistance connected in series with the loop supply for compatibility with HART communicators
• Features push button 25% steps for fast, easy linearity checks
• Includes 0-100% “span check” for fast confirmation of zero and span.
• Provides selectable slow ramp, fast ramp, and step ramp to provide smooth outputs for valve slewing and loop functional tests
• Includes a 24 volt internal loop supply, so you can power and read a transmitter at the same time without a DMM
• Measures V DC to 28 V
• Runs on a single 9 V battery that is easily changed without breaking the calibration seal
• Offers 0 – 20 mA or 4 – 20 mA default start up modes
• Features an innovative output adjustment dial.
• Comes with a protective yellow holster with test lead storage and a three year warranty

The Fluke 709 mA loop calibrator is designed to reduce the time it takes to measure or source voltage or current and power up a loop and still produce high-quality results. The Fluke 709 is built around a user friendly interface with a quick-set rotary encoder knob and best in class accuracy at 0.01% of reading. It features a protective holster that fits easily in a technician’s hand and a large backlit display that is easy to read, even in dark, cramped work areas. So it’s a great choice anywhere you need a compact, rich featured precision loop calibrator.

Other useful features:

• Provides resolution of 1 µA on mA ranges and 1 mV on voltage ranges
• Features a compact rugged design and runs on 6 standard AAA batteries
• Provides Auto Shutdown to conserve battery life (adjustable up to 30 minutes)
• Offers variable step and ramp time in seconds
• Provides adjustable span selection (0 to 20 mA or 4 to 20 mA)
• Includes valve test functionality (simulates defined mA values with % keys)

The Fluke 709H mA loop calibrator is designed to save time and produce high-quality results. It includes HART communication and supports a select set of the HART universal and common practice commands. This makes the 709H unique as both an affordable, compact loop calibrator and powerful HART communication tool that offers:

• Fast transfer of calibration data:The optional 709H/Track software/cable can document the parameters of all the HART transmitters in your plant, in either (.csv) or (.txt) format
• Data logging or recording data on a particular transmitter for troubleshooting: The data log tool offers a selectable capture interval from 1 to 60 seconds and a logging capacity of 9800 records or 99 individual sessions. Each data sample contains the 709H measurement, all four process variables, and the standard status conditions.

In the communicator mode the user can read basic device information, perform diagnostic tests, and trim the calibration on most HART-enabled transmitters. In the past, this could only be done with a dedicated communicator, a high-end multifunction calibrator, or a laptop computer with HART modem. The Fluke 709H will allow virtually any technician to service and support HART devices.

And it’s easy to use. The Fluke 709H is built around a user-friendly interface with a Quick-Set rotary encoder knob. This reduces the time it takes to measure or source voltage or current, and power up a loop. The protective holster easily fits into a technician’s hand and the large backlit display is easy to read, even in dark, cramped worked areas.

Other useful features:

• Provides resolution of 1 µA on mA ranges and 1 mV on voltage ranges
• Quickly transfers calibration data for documentation in either (.csv) or (.txt) format with optional 709H/Track software/cable
• Offers selectable capture interval from 1 to 60 seconds and a logging capacity of 9800 records or 99 individual sessions.
• Features small rugged design and runs on six standard AAA batteries
• Requires only simple two wire connection for all measurements
• Provides Auto Shutdown to conserve battery life (adjustable up to 30 minutes)
• Offers variable step and ramp time in seconds
• Provides adjustable span selection (0 to 20 mA or 4 to 20 mA)
• Includes valve test functionality (simulate defined mA values with % keys)

Smart Control Valve Testing is now easier than ever

The Fluke 710 Valve Testing Loop Calibrator is designed to enable users to perform quick, easy tests on HART smart control valves. Featuring built-in test procedures and an intuitive user interface, the 710 allows users to quickly and easily perform valve tests, while the valve test quick-check results provide at-a-glance diagnostics help you make maintenance decisions faster than ever. The valve health quick-check results let you know whether your valve is in good, marginal or in bad operating condition so you can quickly decide whether additional maintenance is necessary.

Valve testing and HART communication in a precision loop calibrator

With the 710 Valve Testing Loop Calibrator’s built in HART communication function, users can source a 4-20 mA signal to cause the smart control valve to move, while simultaneously interpreting the valve’s HART feedback signal to determine whether the valve is moving to the expected position. In addition to positional information, the measured pressure delivered from the valve’s internal I/P (which moves the valve) can be determined through the HART communication protocol.

The 710 has built-in test procedures that automatically increase and change the mA signal while monitoring the HART position and pressure feedback from the control valve, giving you a better overall picture of valve health at the simple push of a button.

Pre-configured valve tests, at-a-glance answers

Valve test routines built into the 710 include:

• Manual testing; manually change the mA signal and view the HART position and pressure variable information
• Full range ramping of the mA signal from 4 to 20 to 4 mA while recording the 0-100-0% position, or the pressures applied that move the valve from 0-100-0%
• Stepping the mA signal on the input to the valve in steps and evaluating the valves response to the mA input changes
• Speed tests to determine how fast the valve can open or close
• Bump and partial stroke tests that help test valves over a portion of their range so they can be tested in a live process

ValveTrack™ Software enables further analysis and trending

Valve tests that are logged and recorded to memory in the 710 are available to upload to included ValveTrack™ analysis software.

ValveTrack™ software enables you to:

• Upload, print and plot logged valve tests taken in the field
• Compare previous uploaded tests to recent tests
• View valve test history by HART Tag ID
• Export valve test data to CSV for additional analysis in Microsoft Excel®

Saving time, getting answers

In addition, the 710 offers:

• Logging of HART data in the field. Once recorded by the 710 in the field, the ValveTrack™ software can upload the HART configuration of up to (20) HART devices in your plant and output data in either (.csv) or (.txt) format.
• Data logged mA loop measurements and HART data can be recorded from a particular transmitter for troubleshooting and loop tuning. The data log feature offers selectable capture with recording intervals of 1 to 60 seconds and a logging capacity of 4910 records or 99 individual sessions. Each record contains the mA measurement and all four process variables.

Product Highlights

• Valve test procedures that deliver Good, Marginal or Bad assessment of a control valve
• Generic HART communication
• Best-in-class mA accuracy at 0.01 % measurement or source value
• Compact rugged design
• Intuitive user interface with Quick-Set knob for fast setup, easy to use
• 24 V DC loop power with mA measure mode (-25 % to 125 %)
• Resolution of 1 μA on mA ranges and 1 mV on voltages ranges
• Built in selectable 250 Ω resistor for HART communications
• Simple two wire connection for all measurements
• Auto shutdown to conserve battery life
• Variable step and ramp time in seconds

HART communication

The Fluke 710 offers a built-in HART modem to communicate the following HART commands:

• Read sensor PV information
• Read PV output information
• Read and write PV unit type, tag ID name, descriptor, and message
• Read and write PV ranges (upper and lower)
• Enter/exit fixed current mode
• Set zero offset
• Trim DAC zero (mA output 4 mA)
• Trim DAC gain (mA output 20 mA)

HART Commands for Valves

The 710 includes these unique HART commands to support control valves:

• Autotrim of valve controller

In addition, the Fluke 710 offers:

• Logging of HART data in the field. Once recorded by the 710 in the field, the ValveTrack™ software can upload the HART configuration of up to 20 HART devices in your plant and output data in either .csv or .txt format
• Data-logged mA loop measurements and HART data can be recorded from a particular transmitter for troubleshooting and loop tuning. The data log feature offers selectable capture with recording intervals of 1 to 6 seconds and a logging capacity of 4910 records or 99 individual sessions. Each record contains the mA measurement and all four process variables.

Fluke 772 Milliamp Clamp Loop Meter measures, sources, and simulates 4-20 mA signals for testing control system I/O or IPs

The Fluke 772 loop meter adds to the basic capabilities of the Fluke 771 to save more time and expand its applications. With the 771, you’ll also be able to: source and simulate 4-20 mA signals for testing control system I/O; measure 4-20 mA signals with in-circuit measurement; power a transmitter with the 24 V loop power supply; and automatically ramp and step change the 4-20 mA output for remote testing.

You’ll be able to test 4–20 mA signals five times faster than with traditional DMMs, and without breaking the loop. That means you can troubleshoot a live device without having to power down, which can save you time, and help you avoid possibly missing something going on in the process.

Other useful features:

• Simulates 4-20 mA signals for testing control system I/O
• Sources 4 to 20 mA signals for testing control system I/O or I/Ps
• Measures 4 to 20 mA signals with in-circuit measurement
• Includes simultaneous mA in-circuit measurement with 24V loop power for powering and testing transmitters
• Features a detachable clamp with extension cable for measurements in tight locations
• Captures and displays changing measurements with Hold function
• Offers mA output linear ramp or 25% step output
• Extends battery life with auto-off and backlight timeout
• Dual backlit display with both mA measurement and percent of 4 to 20 mA span
• Measurement Spotlight to illuminate hard to see wires in dark enclosures
• Measures 10 to 50 mA signals in older control systems using the 99.9 mA range
• Automatically changes the 4 to 20 mA output for remote testing

• Measure 4 to 20 mA signals without breaking the loop
• Source/simulate 4 to 20 mA signals and provide loop power
• Source/measure DC voltage to verify power supplies or I/O signals
• Best in class accuracy of 0.2%
• Delivers 0.01 mA resolution and sensitivity

• Compact digital multimeter and mA loop calibrator solution
• Measure/Source/Simulate loop currents while powering the loop
• Manual and automatic ramp up – ramp down functions
• Easy-to-read backlit display

• Compact digital multimeter and mA loop calibrator solution
• Full-featured mA loop calibrator with built-in 24v Loop Power
• Quickly and easily troubleshoot every part of a control loop
• Large, bright dual-measurement display