Fluke 709 precision mA loop calibrator
The Fluke 709 is a handheld instrument for working with current loops in instrumentation and process plants. It is used to measure, simulate, or generate an mA signal and simultaneously check if a loop is behaving as it should. In practice, this makes it easier to troubleshoot, calibrate, and verify equipment running on 4-20 mA.
The instrument can both send and read current and can also read voltage up to 30 V DC. This makes it suitable for testing a transmitter, verifying a signal, or checking a loop without having to use several different instruments. The fine resolution in the mA range means that small changes in the signal can be clearly seen, which is often precisely what is needed for precision work.
There is also a built-in 250 Ω resistor, which can be selected for HART communication. This is relevant when working with HART-compatible equipment and wanting a simple way to make communication work in the measurement loop. At the same time, the instrument has loop power, so you can supply the circuit during testing when the task requires it.
The display is a backlit LCD, which makes daily use easier in the field, even when space is tight or light is poor. The instrument is powered by six AAA batteries, making it easy to carry around for service tasks.
For a technician working with process instrumentation, the Fluke 709 is particularly interesting as a compact tool for quick verification of mA signals. It is not a laboratory instrument for everything at once, but a targeted calibration tool for current loops, where simple operation and precise reading are most important.
You can read more here:
See datasheet from the manufacturer
See product video from the manufacturer
Specifications
- Functions: mA source, mA simulate, mA read, mA read/loop power, and volts read
- Measurement and source ranges: 0 to 24 mA and 0 to 30 V DC
- Resolution: 1 µA in mA ranges and 1 mV in voltage range
- Accuracy: 0.01 % ± 2 counts at 23 °C ± 5 °C
- Loop compliance voltage: 24 V DC at 20 mA
- Built-in, selectable 250 Ω resistor for HART communication
- Backlit LCD display of 128 × 64 pixels
- Power supply: 6 x AAA batteries
- Brand: FLUKE
- MPN: 4234350
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