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 m? 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 dcC100 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 100m 1 -60 frequency (hz) amplitude (db) 35 30 25 20 15 10 5 10 100 1k 10k 100k 1m 10m 100m frequency (hz) maximum input current (arms) 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 input impedance (ohm) 0.001 0.01 0.1 1 10 100 -6 -3 0 3 6 9 12 input current (a) deviation (%) 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 users 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 0c 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 m? 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 m? in order to make accurate measurements. if the oscilloscope you are using does not have a 1 m? input impedance setting, you can purchase the agilent e2697a 50? to 1 m? 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 23c 3c (or 73f 5f)
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