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CWT Ultra-mini datasheet Layout 1 - Rogowski

CWT ultra -miniPower Electronic MeasurementsApplications Switching current waveforms in power electronic circuits, for example in MOSFET or IGBT devices as small as TO-220 or TO-47 in bond wires in power devices to measure power losses in semiconductors monitoring currents in small inductors, capacitors, snubber circuits, etc Measuring small AC currents in the presence of large DC currents ( monitoring capacitor ripple) Power converter development and diagnostics Measuring high frequency sinusoidal, pulsed or transient currents Measuring high order harmonics Key features Expanded operating temperature range-40oC to +125oC Extended (-3dB) bandwidth from a few Hz to 30 MHz Current ratings from 30 Apk to 6000 Apk Improved peak di/dt capabilities up to 70kA/ s (max) cross section, flexible, clip-around coil 6V into 1M , and 50 drive capability Loads the circuit under test by only a few pH Positional accuracy typically 2%Gloucester House, 162 Wellington Street, Long Eaton, Nottingham.

Range Model Power option Cable length (m) Coil length (mm) UM / 015 / R / 1 / 80 Performance August 2013 www.pemuk.com Output ±6V peak corresponding to ‘Peak Current’ into ≥ 100kΩ (e.g. DC 1MΩ oscilloscope) ±2V peak at half ‘Sensitivity’ into 50Ω (for long output cables)

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Transcription of CWT Ultra-mini datasheet Layout 1 - Rogowski

1 CWT ultra -miniPower Electronic MeasurementsApplications Switching current waveforms in power electronic circuits, for example in MOSFET or IGBT devices as small as TO-220 or TO-47 in bond wires in power devices to measure power losses in semiconductors monitoring currents in small inductors, capacitors, snubber circuits, etc Measuring small AC currents in the presence of large DC currents ( monitoring capacitor ripple) Power converter development and diagnostics Measuring high frequency sinusoidal, pulsed or transient currents Measuring high order harmonics Key features Expanded operating temperature range-40oC to +125oC Extended (-3dB) bandwidth from a few Hz to 30 MHz Current ratings from 30 Apk to 6000 Apk Improved peak di/dt capabilities up to 70kA/ s (max) cross section, flexible, clip-around coil 6V into 1M , and 50 drive capability Loads the circuit under test by only a few pH Positional accuracy typically 2%Gloucester House, 162 Wellington Street, Long Eaton, Nottingham.

2 NG10 4HS. United +44 (0) 115 946 +44 (0) 115 946 CWT Ultra-mini has an extremely thin, clip-aroundRogowski coil of typically cross-section. Such a thincoil enables currents to be measured in the most difficult toreach parts of a power electronic converter with negligibledisruption to the circuit under test. This latest release of the CWTU ltra- mini has improved: high frequency (-3dB) bandwidth of 30 MHz operating temperature range of -40oC to +125oCPulsed current: 100 Apk, 21 sCh1-CWT (300A)Ch2-Co-ax shunt 2 GHzTimebase 4 s/divExpanded rising edge: 10 to 90% is 42nsPredictable time delayTimebase 40ns/divCWT UM coilthrough thelegs of a T0-220 deviceCWT Ultra-mini datasheet_Layout 1 01/08/2013 15:28 Page 1 RangeModelPower optionCable length(m)Coil length(mm)UM/015/R/1/80 Performance August 6V peak corresponding to Peak Current into 100k ( DC 1M oscilloscope) 2V peak at half Sensitivity into 50 (for long output cables)AccuracyVariation with conductor position in the coil typically 2% of reading (for a 2mm2conductor)Linearity (with current magnitude) of readingCalibrationCalibrated to reading with conductor central in the coil loopDC offset 3mV maximum at 25oCTemperature Coil and cable -40oC to +125oC.

3 Integrator 0 to +40oCdi/dt ratingsThese are Absolute maximum di/dt ratings and values must not be exceeded:Absolute max. peak di/dt: 70kA/ sAbsolute max. rms di/dt: s ( s for models CWT1 and above)Coil Safe peak working voltage to earth. Rating established by a 3kVrms, 50Hz, 60sec flash testPower Electronic MeasurementsModelSensitivity(mV/A)Peak current(A)Noise maximum(mVp-p)Droop(%/ms)LF (-3dB)bandwidth(Hz)Peak di/dt(kA/ s)HF (-3dB)bandwidth(MHz) featuresqCoil length (circumference) 80mm - longer coils available on cross-section (thickness) (max).eCable length 1m (connecting cable coil to integrator) - longer cables available on optionsB-Standard:4 x AA alkali batteries. Lifetime typically 25 hours. R-Rechargeable:4 x AA NiMH batteries. Lifetime typically 10 hours. External adaptor recharges batteries and powers for external power adaptor (adaptor available from PEM as an option)yElectronics enclosure.

4 Dimensions H=183mm, W=93mm, D= BNC socket. Supplied with BNC:BNC detailed technical notes for this product are available CWTG enerating the part codeCWT Ultra-mini , peak current 30A, rechargeable battery, 1m cable, 80mm you have any queries regarding the CWT or require specifications outside our standard ranges please contact Ultra-mini datasheet_Layout 1 01/08/2013 15:28 Page 2


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