N2779A - KEYSIGHT TECHNOLOGIES

Keysight N2780B Series

AC/DC Current Probes

A wide selection of current probes

to meet your application’s needs

Data Sheet

02 | Keysight | N2780B Series AC/DC Current Probes A wide selection of current probes to meet your application’s needs - Data Sheet

– 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

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.

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.

Figure 1. N2780B Series current probes

with N2779A power supply

Figure 2. N2783B, N2780B, N2781B and N2782B current probe (from left to right)

03 | Keysight | N2780B Series AC/DC Current Probes A wide selection of current probes to meet your application’s needs - Data Sheet

Figure 3. Frequency response of N2783B Figure 4. Continuous maximum input rating of N2783B

-10

-20

-30

-40

-50

100 10k 1M 100M

-60

Frequency (Hz)

Amplitude (dB)

10 100 1k 10k 100k 1M 10M 100M

Frequency (Hz)

Maximum input current (Arms)

Figure 5. Insertion impedance of N2783B Figure 6. Amplitude accuracy characteristics of N2783B

100 1k 10k 100k 1M 10M 100M

Frequency (Hz)

10m

100m

Input Impedance (ohm)

0.001 0.01 0.1 110 100

-6

-3

Input Current (A)

Deviation (%)

AC 50 Hz DC

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

Note: For the characteristic plots of other current probe models, refer to the N2780B Series current probe user’s manual.

04 | Keysight | N2780B Series AC/DC Current Probes A wide selection of current probes to meet your application’s needs - Data Sheet

Compatible Oscilloscopes

Any oscilloscope offering 1 MΩ BNC

input including Keysight Technologies,

Inc. 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 Keysight E2697A 50Ω to 1

MΩ adapter for use with the Infiniium

80000 or 90000 Series or the N5449A

high impedance probe adapter for use

with the Infiniium 90000 X-Series.

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

N2779A

3-channel power supply for

N2780B Series current probes

Note*: The amplitude accuracy specifications are guaranteed at 23°C ± 3°C (or 73°F ± 5°F)

**: Insulated conductor should be used.

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)

20 mA 20 mA 5 mA 5 mA

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,

300 V CAT III

600 V CAT II,

300 V CAT III

300 V CAT I 300 V CAT I

Amplitude accuracy*

(DC and 45 to 66 Hz, rated current)

±1.0% rdg.

± 500 mA

±1.0% rdg.

± 100 mA

±1.0% rdg.

± 10 mA

±1.0% rdg.

± 10 mA

Noise (measured with 20 MHz

bandwidth limit filter on the scope)

Equivalent to

25 mArms or less

Equivalent to

25 mArms or less

Equivalent to

2.5 mArms or less

Equivalent to

2.5 mArms or less

Temperature coefficient for sensitivity (within a

range of 0°C to 40 °C or 32 °F to 104 °F)

±2% or less ±2% or less ±2% or less ±2% or less

Effect of external magnetic fields

(in a DC to 60 Hz, 400 A/m magnetic field)

Equivalent to a

maximum of

800 mA

Equivalent to a

maximum of

150 mA

Equivalent to a

maximum of 20 mA

Equivalent to a

maximum of 5 mA

Maximum rated power 7.2 VA (with rated

current)

5.5 VA (with rated

current)

5.6 VA (with rated cur-

rent)

5.3 VA (with rated cur-

rent)

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”

dia.) )

5 mm dia. (0.2” dia.) 5 mm dia. (0.2” dia.)

Diameter of measurable conductors Sensor cable:

Approx. 2 m (78.7”)

Power supply cable:

Approx. 1 m (39.4”)

Sensor cable:

Approx. 2 m (78.7”)

Power supply cable:

Approx. 1 m (39.4”)

Sensor cable:

Approx. 1.5 m (78.7”)

Power supply cable:

Approx. 1 m (39.4”)

Sensor cable

Approx. 1.5 m (78.7”)

Power supply cable:

Approx. 1 m (39.4”)

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05 | Keysight | N2780B Series AC/DC Current Probes A wide selection of current probes to meet your application’s needs - Data Sheet

This information is subject to change without notice.

Published in USA, August 2, 2014

5989-6432EN