Figure 1 N2780B Series current probes
with N2779A power supply
• Various bandwidths: DC to 2 MHz,
10 MHz, 50 MHz, 100 MHz
• DC and AC measurements
• Superior 1% accuracy and high
signal-to-noise ratio
• Overload-protect function prevents
probe damage from excessive input
• Direct connection to high-impedance
1 MΩ BNC input of oscilloscope
• “Demagnetize” button to remove any
residual magnetism that builds up in
the magnetic core
• External power supply (N2779A) lets
you connect up to three N278xB
current probes to a single power
supply
N2780B Series AC/DC Current Probes
A wide selection of current probes to meet
your application's needs
Data Sheet
Hybrid technology for AC and DC measurements
Using hybrid technology that includes a Hall-effect sensor and an AC current
transformer, the probes provide accurate measurement of DC or AC currents up to
500 Arms (for model N2780B) or DC–100 MHz (for model N2783B), without breaking into the circuit. Using split core construction, the probe easily clips on and off
of a conductor.
Wide range of applications
The current probes feature broad measurement ranges (up to 500 A), flat frequency response, low noise and low insertion loss that make the probes ideal for current measurements in areas such as measuring steady state or transient current
of motor drives, switching power supplies, inverters, controllers, sensors, disk
drives, LCD displays, electronic ballasts and amplifiers. The high signal-to-noise
ratio of the N2782B and N2783B makes them ideal for making low-level current
measurements in milliampere ranges.
Accurate current measurement
A built-in DEMAG (demagnetize) function allows the removal of any residual
magnetism that has built up in the magnetic core due to power on/off switching
or excessive input current. In addition, voltage offset or temperature drift on the
probe can be easily corrected by using the zero adjustment control.
Compatible with any oscilloscope
with a high-impedance BNC input, the
new N2780B Series current probes
offer accurate and reliable solution for
measuring DC and AC currents.
Figure 2 N2783B, N2780B, N2781B and N2782B current probe (from left to right)
-10
35
-20
-30
-40
Amplitude (dB)
-50
-60
1
100
10k
Frequency (Hz)
Figure 3 Frequency response of N2783B
10
1
100m
10m
Input Impedance (ohm)
1M
100M
30
25
20
15
10
Maximum input current (Arms)
5
10 100 1k 10k 100k 1M 10M 100M
Frequency (Hz)
Figure 4 Continuous maximum input rating of N2783B
12
9
6
3
0
-3
Deviation (%)
-6
0.001 0.01 0.1 1 10 100
1m
1k 10k
100
100k
Frequency (Hz)
Figure 5 Insertion impedance of N2783B
1M
10M
100M
Figure 6. Amplitude accuracy characteristics of N2783B
Input Current (A)
AC 50 Hz DC
Note: For the characteristic plots of other current probe models, refer to the N2780B Series current probe user’s manual.
N2779A 3-channel power supply specifications
Applicable current probes: N2780B, N2781B, N2782B, N2783B and N2774A
Number of power supply connectors: 3
Connector type: LEMO inc./FFA..0S.304.CNAC42Z
Output voltage: DC (12 V, 2.5 A)
Maximum rated power: 170 VA
Input power requirement: AC 100-240 VAC, 50/60 Hz, 125-170 VAC
2
Model number N2780B N2781B N2782B N2783B
Bandwidth (-3dB) DC to 2 MHz DC to 10 MHz DC to 50 MHz DC to 100 MHz
Risetime 175 ns or less 35 ns or less 7 ns or less 3.5 ns or less
Maximum current (continuous) RMS 500 A 150 A 30 A 30 A
Maximum peak current (non-continuous) 700 A peak 300 A peak; 50 A peak 50 A peak
Lowest measurable current (at ±3% accuracy
at DC, scope set to 1 mV/div and
high-resolutionmode on)
Output voltage rate 0.01 V/A (100:1) 0.01 V/A (100:1) 0.1 V/A (10:1) 0.1 V/A (10:1)
Max input voltage** 600 V CAT II,
Amplitude accuracy*
(DC and 45 to 66 Hz, rated current)
Noise (measured with 20 MHz
bandwidth limit filter on the scope)
Temperature coefficient for sensitivity (within a
range of 0°C to 40 °C or 32 °F to 104 °F)
Effect of external magnetic fields
(in a DC to 60 Hz, 400 A/m magnetic field)
Maximum rated power 7.2 VA (with rated
Rated supply voltage DC ±12 V ±0.5 V DC ±12 V ±1 V DC ±12 V ±0.5 V DC ±12 V ±0.5 V
Diameter of measurable conductors 20 mm dia. (0.79” dia.) 20 mm dia. (0.79”
Diameter of measurable conductors Sensor cable:
20 mA 20 mA 5 mA 5 mA
600 V CAT II,
300 V CAT III
±1.0% rdg.
± 500 mA
Equivalent to
25 mArms or less
±2% or less ±2% or less ±2% or less ±2% or less
Equivalent to a
maximum of
800 mA
current)
Approx. 2 m (78.7”)
Power supply cable:
Approx. 1 m (39.4”)
300 V CAT III
±1.0% rdg.
± 100 mA
Equivalent to
25 mArms or less
Equivalent to a
maximum of
150 mA
5.5 VA (with rated
current)
dia.) )
Sensor cable:
Approx. 2 m (78.7”)
Power supply cable:
Approx. 1 m (39.4”)
300 V CAT I 300 V CAT I
±1.0% rdg.
± 10 mA
Equivalent to
2.5 mArms or less
Equivalent to a
maximum of 20 mA
5.6 VA (with rated current)
5 mm dia. (0.2” dia.) 5 mm dia. (0.2” dia.)
Sensor cable:
Approx. 1.5 m (78.7”)
Power supply cable:
Approx. 1 m (39.4”)
±1.0% rdg.
± 10 mA
Equivalent to
2.5 mArms or less
Equivalent to a
maximum of 5 mA
5.3 VA (with rated current)
Sensor cable
Approx. 1.5 m (78.7”)
Power supply cable:
Approx. 1 m (39.4”)
Note*: The amplitude accuracy specifications are guaranteed at 23°C ± 3°C (or 73°F ± 5°F)
**: Insulated conductor should be used.
Compatible Oscilloscopes
Any oscilloscope offering 1 MΩ BNC
input including Agilent 1000, 3000
InfiniiVision 2000X, 3000X, 5000, 6000
and 7000 Series, and Infiniium 8000 and
9000 Series. You must select the input
impedance of the oscilloscope to be
1 MΩ in order to make accurate measurements. If the oscilloscope you are
using has a 50Ω input impedance setting only, you can purchase the Agilent
E2697A 50Ω to 1 MΩ adapter for use
Ordering Information
N2780B
2 MHz/500A AC/DC current probe
N2781B
10 MHz/150A AC/DC current probe
N2782B
50 MHz/30A AC/DC current probe
N2783B
100 MHz/30A AC/DC current probe
N2779B
3-channel power supply for
N2780B Series current probes
with the Infiniium 80000 or 90000
Series or the N5449A high impedance
probe adapter for use with the Infiniium
90000 X-Series.
3
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Revised: June 8, 2011
Product specifications and descriptions
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© Agilent Technologies, Inc. 2011
Published in USA, November 08, 2011
5989-6432EN
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