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DCFlex Current Probe
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Overview
The DCflex is an easy to use, low cost, thin and clip-around DC current probe. It is suitable for measuring large DC currents of >2kA.
The DCflex takes a single shot measurement of the DC current with a typical accuracy of ±1%. It is important to understand that the DCflex does not provide a continuous measurement of DC current.
The DC current is displayed on a small LCD display on the front of the electronics enclosure. Alternatively the output can be viewed on a DMM or oscilloscope via a BNC socket on the front of the enclosure, a feature that is useful if the DC current measured has a ripple component which needs to be measured.
Press the reset button Null the offset to zero
Clip the probe around the busbar
Take a reading
Standards and Approvals
- CE marked
- Designed to comply with IEC61010-1:2001
- PEM Ltd is an ISO9001:2008 registered company
Performance
| Peak current (FS) | 10kA, 20kA, 30kA, 40kA (higher custom ratings available) |
|---|---|
| Output (FS) | 2.0V peak |
| Accuracy (typ.) | ± 0.4% of reading - Calibration Calibrated to ±0.4% with conductor central in the Rogowski loop – cal. certificate supplied ±0.5% of reading – Conductor position accuracy Typical variation with the position of a 20cm2 bus-bar in the Rogowski coil loop conductor position 0.1% of full scale – LCD display error 10.0Ap-p – Uncertainty due to noise (e.g. for the 10kA version 0.1% of FS, and for the 40kA version 0.025% of FS) |
| Measurement drift |
0.025% per second of reading - Set-up drift From reset to clipping the coil into its socket around the bus-bar < 5.0A /sec - Output drift From clipping the coil into its socket to taking a reading |
| Operating temperature range | 0℃ to +40℃ (Integrator electronics) –10℃ to +120℃ (Coil and cable) |
| Coil Lengths | 1000mm or 2000mm (custom lengths available) |
| Coil thickness | 8.5mm max. |
| Peak coil insulation | 2kV peak |
| Cable Length (coil to integrator) | 1.5m (custom lengths available) |
| Power Supply | ‘B’ Battery 4 x AA (1.5V standard alkali batteries) Plus - 2.1mm socket for 12V (±10%) DC input |
| Display | 1.999V max output (4 digit display 0.001V resolution) -also- BNC socket to plug output directly into DMM, scope, etc. |
Features
- Traceable calibration (certificate included)
- Integral display so no need for external meters or oscilloscopes (though BNC output also provided)
- Fully galvanically isolated measurement
- Thin, flexible, clip-around coil easy to insert in confined spaces
- Large circumference coils capable of being installed around very large bus-bars or cable bundles.
Applications
Power (Quality) Measurements
Some typical applications include
- Metal smelting plants
- Cathodic protection
- Hydro-generation
- DC link (large inverter motor drives)
- Plating plants
- Verifying the performance of large dc shunts or Hall Effect transducers that are in-situ in existing plant.
