Datasheet

Page 27
Find us at www.keysight.com
– Easy-to-use clip-around coil enabling current measurement in confined space
– Measure AC current up to 3,000 Apk (with N7040A)
– Up to 30 MHz bandwidth (with N7041A/42A)
The N7040A Series Rogowski coil current probes are designed for measuring AC
currents ranging from a few 100 milliamps to 3,000 A from 3 Hz to > 30 MHz.
The probes have a thin, lightweight, flexible and simple-to-use clip-around Rogowski
coil that enables current measurement in the most difficult-to-reach parts and confined
spaces of a circuit under test and can measure large AC current without increase in
transducer size.
The N7040A Series is ideal for measuring AC current in the presence of large DC current
and can be used to design, debug and troubleshoot power semiconductor circuits,
power supplies, inverters and motor drives.
These probes come with an AC power adapter and 4x AA batteries to power the probe
and can be used with any oscilloscope with 1 Mohm BNC interface.
N7040A N7041A N7042A
HF bandwidth (—3 dB) 23 MHz 30 MHz 30 MHz
LF bandwidth (—3 dB) 3 Hz 12 Hz 9.2 Hz
Peak current (Apk) 3,000 Apk 600 Apk 300 Apk
Sensitivity 2 mV/A (500:1) 10 mV/A (100:1) 20 mV/A (50:1)
Max noise (mVpp) 8 mVpp 10 mVpp 15 mVpp
Droop (%/msec) 2.8%/msec 11%/msec 9%/msec
Peak di/dt (kA/usec) 80 kA/µsec 40 kA/µsec 20 kA/µsec
Absolute max peak di/dt (kA/µsec) 100 kA/µsec 100 kA/µsec 70 kA/µsec
Absolute max rms di/dt (kA/µsec) 1.2 kA /µsec 1.2 kA /µsec 1.2 kA/µsec
Accuracy Calibrated to ± 0.2% of reading with conductor central in the coil loop
Variation in conductor position ± 2% of reading
Linearity 0.05% of reading
DC offset ± 3 mV max at 25 ºC
Temperature range Coil and cable at —40 to +125 ºC
Coil voltage 5 kV peak 5 kV peak 1.2 kV peak
Coil length (circumference) 200 mm 100 mm 80 mm
Coil cross-section (diameter) 4.5 mm 4.5 mm 1.7 mm
Cable length 4 m (connecting cable coil to
integrator box)
2.5 m (connecting cable coil to integrator box)
Total cable length 4.5 m (4 m input cable + 0.5 m BNC
cable to scope)
3 m (2.5 m input cable + 0.5 m BNC cable to scope)
Probe output Terminated into 1 MΩ BNC input of oscilloscope
Probe power 4x AA batteries and AC power adapter (included)
N7040A/41A/42A Rogowski Coil AC Current Probes