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Intrinsically safe loop calibrator

The 707Ex is an intrinsically safe loop calibrator for use in explosion endangered areas. The Fluke 707Ex is certified in accordance with the ATEX directive (Ex II 2 G Ex ia IIC T4) in Zones 1 and 2.


  • 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

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Fluke 1587 Insulation Multimeters
Current measurement Range 0 to 24 mA
  Resolution 0.001 mA
  Accuracy 0.015% Rdg + 2 LSD
Current sourcing Range 0 to 20 mA or 4 to 20 mA
  Accuracy 0.015% Rdg + 2 LSD
  Drive capability 700 Ω at 20 mA
Current simulation Range 0 to 20 mA or 4 to 20 mA
  Accuracy 0.015% Rdg + 2 LSD
Loop power   While measuring mA, 24 V
Voltage measurement Range 0 to 28 V DC
  Resolution 1 mV
  Accuracy 0.015% Rdg + 2 LSD
Environmental Specifications
Operating temperature   -10ºC to 55ºC
Storage temperature   -40ºC to 60ºC
Humidity (without condensation)   0 to 95% (0ºC to 30ºC);
0 to 75% (30ºC to 40ºC)
0 to 45% (40ºC to 50ºC)
Temperature coefficient   -10ºC to 18ºC, 28ºC to 55ºC, ±.005% of range per ºC
Safety Specifications
Safety   CSA C22.2 No. 1010.1:1992
EMC   EN50082-1:1992 and EN55022:1994 Class B
Maximum voltage   30 V
ATEX certification   Ex II G Ex ia IIC T4 Zones 1 and 2, ZELM 02 ATEX 0120 X
CE certification   EN61010-1 and EN61326
Mechanical and General Specifications
Size   152 x 70 x 41 mm
Weight   224 g (350 g including holster)
Batteries   One 9V battery Alkaline
Warranty   3 year
Shock & vibration   per MIL-T-28800 for a Class 2 Instrument
Display current and % of span   Yes
Auto step, auto ramp   Yes
Span check   Yes

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