Voltage, Current & Loop Calibrators (37 Products)

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  1. TestSafe RTD Calibrator All Test Safe Products
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    TestSafe RTD Calibrator
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    • Simulate and measure RTD
    • Resistance calculation
    • Various advanced features
    798 Reward Points
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    SKU: TSCALIB2
  2. Time Electronics Dc Voltage And Current Calibrator 0 05 Percent Accuracy All Time Electronics Products
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    Time Electronics DC Voltage and Current Calibrator
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    • High accuracy of 0.05%
    • Can measure and source current and voltage
    • Portable with its own carrying case
    892 Reward Points
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    SKU: 1044
  3. 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
  4. Time Electronics Voltage Current Loop Calibrator 0 02 Percent Accuracy All Time Electronics Products
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    Time Electronics Voltage / Current / Loop Calibrator
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    • Works with current and voltage levels
    • Accuracy of 0.02%
    • Suitable for being used by a number of professions
    1,050 Reward Points
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    SKU: 1048
  5. 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
  6. GE Druck UPS-III Loop Calibrator All GE Druck Products
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    GE Druck UPS-III Loop Calibrator
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    £734.40 £612.00
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    • Simultaneous percentage and mA readings
    • Extremely high accuracy
    • Portable, pocket-sized design
    1,224 Reward Points
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    SKU: UPS-III
  7. Fluke 707 Loop Calibrator - Kit All Fluke Products
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    Fluke 707 Loop Calibrator
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    £745.14 £620.95
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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
  8. Fluke 709 Precision Loop Calibrator All Fluke Products
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    Fluke 709 Precision Loop Calibrator
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    £801.54 £667.95
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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
  9. Time Electronics Voltage Current Loop Calibrator 0 01 Percent Accuracy All Time Electronics Products
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    Time Electronics 7005 Voltage, Current & Loop Calibrator
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    £834.00 £695.00
    • Ranges are fully programmable
    • Easy and simple to use – even for first timers
    • Min/Max Recording
    1,390 Reward Points
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    SKU: 7005
  10. Time Electronics Dc Millivolt Source 0 02 Percent Accuracy 1 All Time Electronics Products
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    Time Electronics 1006 DC Millivolt Source
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    £834.00 £695.00
    • Accuracy of 0.02%
    • 1V with up to 3 ranges
    • Protection against short circuit and overload
    1,390 Reward Points
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    SKU: 1006
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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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