Fluke 707Ex 

An intrinsically safe loop calibrator for use in explosion endangered areas.

The fast one-handed tool for mA loop checks in Ex zones 

Features :

• Large display and simple, quick-click push rotary button for easy one-handed operation
• Simultaneous mA and % readout for quick, easy, interpretation of readings.
• mA accuracy of 0.015%, superior to other loop calibrators
• 1 µA resolution for mA source, simulate and measure
• Push button with 25% steps for fast, easy linearity checks
• 0-100% "span check" for fast confirmation of zero and span
• Selectable slow ramp, fast ramp, and step ramp to provide smooth outputs for valve slewing and loop functional tests
• Internal loop supply, so you can power and read a transmitter at the same time without carrying a DMM
• Measures Vdc to 28 V
• Single 9 V battery that is easily changed
• 0-20 mA or 4-20 mA default start up modes
• Innovative output adjustment dial with 1 µA and 100 µA resolution
• HART® compatible resistance is connected in series with the loop supply for compatibility with HART communicators