Voltage, Current & Loop Calibrators (37 Products)

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  1. Fluke 771 Milliamp Process Clamp Meter All Fluke Products
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    Fluke 771 Milliamp Process Clamp Meter
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    • Long battery life (40 hours)
    • 0.01 mA resolution
    • backlit dual display
    790 Reward Points
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    SKU: Fluke 771
  2. Fluke 705 Loop Calibrator All Fluke Products
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    Fluke 705 Loop Calibrator
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    • Source, simulate and measure mA
    • Highly accurate (0.02%) with resolution down to 0.001mA
    • Simultaneous mA and % of span display
    1,012 Reward Points
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    SKU: Fluke 705
  3. Fluke 772 Milliamp Process Clamp Meter Kit All Fluke Products
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    Fluke 772 Milliamp Process Clamp Meter
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    • Wide range of ampage
    • 0.2% accuracy
    • Option for linear ramp of 25% steps
    1,116 Reward Points
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    SKU: Fluke 772
  4. Fluke 707 Loop Calibrator - Kit All Fluke Products
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    Fluke 707 Loop Calibrator
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    • Simultaneous mA and % span measurements
    • Quick and easy to use
    • For calibration, repair and maintenance of current loops
    1,240 Reward Points
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    SKU: Fluke 707
  5. Fluke 709 Precision Loop Calibrator All Fluke Products
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    Fluke 709 Precision Loop Calibrator
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    • Portable handheld unit
    • Measure and source voltage or current
    • Power loops
    1,334 Reward Points
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    SKU: FLUKE709
  6. Fluke 787B Process Meter - Kit All Fluke Products
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    Fluke 787B Process Meter™
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    • Two in one digital multimeter and mA loop calibrator
    • Compact design
    • Multitude of measurement functions and ability to measure, source and simulate up to 20mA DC
    1,434 Reward Points
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    SKU: FLUKE 787B
  7. fluke 773 milliamp process clamp meter All Fluke Products
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    Fluke 773 Milliamp Process Clamp Meter
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    • Measures mA signals without breaking the loop
    • Best in class with 0.2% accuracy
    • Dual backlit display with mA measurement and percent of 4 - 20 mA span
    1,578 Reward Points
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    SKU: FLUKE773
  8. Fluke 789/E ProcessMeter - Kit All Fluke Products
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    Fluke 789/E ProcessMeter
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    • Loop calibrator and DMM in one tool
    • Built-in HART resistor
    • Full suite of multimeter functions including voltage, current and continuity
    1,598 Reward Points
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    SKU: FLUKE789
  9. Fluke 707Ex Intrinsically Safe Loop Calibrator - Kit All Fluke Products
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    Fluke 707Ex Intrinsically Safe Loop Calibrator
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    • Intrinsically safe for use in dangerous environments
    • Large, easy-to-read display,  quick-click and push rotary buttons for ease of use
    • Certified in accordance with ATEX directive
    1,642 Reward Points
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    SKU: FLUKE707EX
  10. Fluke 715 Volt/mA Calibrator - Kit All Fluke Products
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    Fluke 715 Volt/mA Calibrator
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    • Calibrate volt and mA sources with the greatest of ease
    • Works with Fluke 80 series digital multimeters
    • Robust, lightweight and easy-to-use
    1,876 Reward Points
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    SKU: Fluke 715
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About Voltage, Current & Loop Calibrators

Also known as current loops, 4-20mA sources are one of the most common methods used in the process industry for transmitting data between sensors and the applications that control and monitor them. The main advantage of a current loop is they can be combined with a huge variety of different sensors to measure temperature, pressure, liquid flow or light. This data is then compatible with a wide range of different management applications that interoperate with the data and react accordingly.

4-20mA current loops work by taking the results from the sensor and converting it to a proportional current. This means that a zero result causes a 4mA to be transmitted and a 20mA current is sent when the sensor is at full capacity. This information is then sent through copper cables to a receiver at the controller. The controller then decodes the sent signal into the format that is required by the process monitoring application.

The drawback with this method is that over long distances the signal can eventually erode as the voltage begins to wane. An engineer must also be careful when laying these cables to ensure that no electrically noisy systems are located close by, otherwise they can affect the signal. The main precaution that can be taken is to ensure the use of shielded cabling but this can become too expensive if used over long distances.

To ensure that a current loop is operating effectively engineers often use current calibrators to test the cables and ensure that there are no issues that need resolving no matter what their source.

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