N2780A 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 N278xA
current probes to a single power
supply
Compatible with any oscilloscope
with a high-impedance BNC input, the
new N2780A 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 N2780A) or DC–100 MHz (for model N2783A), without break-
ing 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 frequen-
cy response, low noise and low insertion loss that make the probes ideal for cur-
rent 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 N2782A and N2783A 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 N2780A Series current probes
with N2779A power supply
Figure 2 N2783A, N2780A, N2781A and N2782A current probe (from left to right)
2
Figure 3 Frequency response of N2783A Figure 4 Continuous maximum input rating of N2783A
-10
-20
-30
-40
-50
100 10k 1M 100M1-60
Frequency (Hz)
Am
pl
itu
de
(d
B)
35
30
25
20
15
10
5
10 100 1k 10k 100k 1M 10M 100M
Frequency (Hz)
M
ax
im
um
in
pu
t c
ur
re
nt
(A
rm
s)
Figure 5 Insertion impedance of N2783A Figure 6. Amplitude accuracy characteristics of N2783A
100 1k 10k 100k 1M 10M 100M
Frequency (Hz)
1m
10m
100m
1
10
In
pu
t I
m
pe
da
nc
e
(o
hm
)
0.001 0.01 0.1 1 10 100
-6
-3
0
3
6
9
12
Input Current (A)
De
vi
at
io
n
(%
)
AC 50 Hz DC
N2779A 3-channel power supply specifications
Applicable current probes: N2780A, N2781A, N2782A, N2783A 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 N2780A Series current probe user’s manual.
3
Model number N2780A N2781A N2782A N2783A
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 20 mA 20 mA 5 mA 5 mA
(at ±3% accuracy at DC, scope
set to 1 mV/div and high-resolution
mode 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)
Amplitude accuracy* ±1.0% rdg. ±1.0% rdg. ±1.0% rdg. ±1.0% rdg.
(DC and 45 to 66 Hz, rated current) ± 500 mA ± 100 mA ± 10 mA ± 10 mA
Noise (measured with 20 MHz Equivalent to Equivalent to Equivalent to Equivalent to
bandwidth limit filter on the scope) 25 mArms or less 25 mArms or less 2.5 mArms or less 2.5 mArms or less
Temperature coefficient for ±2% or less ±2% or less ±2% or less ±2% or less
sensitivity (within a range of 0°C
to 40 °C or 32 °F to 104 °F)
Effect of external magnetic fields Equivalent to a Equivalent to a Equivalent to a Equivalent to a
(in a DC to 60 Hz, 400 A/m maximum of 800 mA maximum of 150 mA maximum of 20 mA maximum of 5 mA
magnetic field)
Maximum rated power 7.2 VA (with rated 5.5 VA (with rated 5.6 VA (with rated 5.3 VA (with rated
current) current) current) current)
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.)
Cable lengths Sensor cable: Sensor cable: Sensor cable: Sensor cable:
Approx. 2 m (78.7”) Approx. 2 m (78.7”) Approx. 1.5 m (78.7”) Approx. 1.5 m (78.7”)
Power supply cable: Power supply cable: Power supply cable: Power supply cable:
Approx. 1 m (39.4”) Approx. 1 m (39.4”) Approx. 1 m (39.4”) Approx. 1 m (39.4”)
Compatible Oscilloscopes
Any oscilloscope offering 1 MΩ BNC
input including Agilent 1000 Series,
InfiniiVision 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 does not
have a 1 MΩ input impedance setting,
you can purchase the Agilent E2697A
50Ω to 1 MΩ adapter.
Ordering Information
N2780A
2 MHz/500A AC/DC current probe
N2781A
10 MHz/150A AC/DC current probe
N2782A
50 MHz/30A AC/DC current probe
N2783A
100 MHz/30A AC/DC current probe
N2779A
3-channel power supply for
N2780A Series current probes
Note*: The amplitude accuracy specifications are guaranteed at 23°C ± 3°C (or 73°F ± 5°F)
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Revised: October 1, 2008
Product specifi cations and descriptions
in this document subject to change
without notice.
© Agilent Technologies, Inc. 2009
Printed in USA, June 26, 2009
5989-6432EN
www.agilent.com
www.agilent.com/fi nd/probes
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