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N2780/81/82/83 User’s and Service Guide

33

Making the Measurement

1

Check that the system is safe and that the preparations 
described in the preceding section have been carried out. 

2

Pull the sensor opening lever with the sensor head opens. 

3

Align the sensor so that the current direction indication 
corresponds to the direction of current flow through the 
conductor to be measured. Also, align the clamp so that 
the conductor is in the center of the sensor aperture. 

4

Press the opening lever on the sensor head until the 
"UNLOCK" indication disappears. Also check that the 
opening lever is firmly locked and the sensor head 
securely closed. 

5

Before making current measurements, the oscilloscope 
must be set up as follows.

The N2780A/B and N2781A/B oscilloscope setup.

The N2782A/B and N2783A/B oscilloscope setup.

Input Impedance

1 M

Attenuation Ratio

100:1

Units

Amperes

Input Impedance

1 M

Attenuation Ratio

10:1

Units

Amperes

medium_standard.book  Page 33  Friday, September 10, 2010  2:45 PM

Содержание N2780A

Страница 1: ...Agilent Technologies Agilent N2780A B N2781A B N2782A B and N2783A B Current Probes User s and Service Guide medium_standard book Page 1 Friday September 10 2010 2 45 PM...

Страница 2: ...nflict with these terms the warranty terms in the separate agreement shall control Technology Licenses The hardware and or software described in this document are furnished under a license and may be...

Страница 3: ...he N2782A B and N2783A B 16 Specifications and Characteristics 18 Specifications Warranted 18 Characteristics Non warranted 19 General Characteristics 20 Environmental Specifications 20 Measurement Pr...

Страница 4: ...N2780 81 82 83 User s and Service Guide Contents Performance Verification Testing 41 Required Test Equipment 41 Amplitude Accuracy Test 42 medium_standard book Page 4 Friday September 10 2010 2 45 PM...

Страница 5: ...5 Agilent Technologies Agilent N2780A B N2781A B N2782A B and N2783A B Current Probes User s and Service Guide 1 User s Guide medium_standard book Page 5 Friday September 10 2010 2 45 PM...

Страница 6: ...amaged notify your Agilent Technologies Sales Office Inspect the probe If there is mechanical damage or defect or if the probe does not operate properly or pass performance tests notify your Agilent T...

Страница 7: ...83 User s and Service Guide 7 Accessories Supplied The following is a list of supplied accessories Table 1 User s and Service Guide 1 Carrying Case 1 medium_standard book Page 7 Friday September 10 2...

Страница 8: ...or accidents or injuries not resulting directly from device defects Symbols The following table shows the different symbols that can appear on the probe and in the manual and their meaning Instruction...

Страница 9: ...ng While clamping and measuring do not touch the clamp in front of the barrier or the conductor being measured Be careful to avoid damaging the insulation surface while taking measurements Make sure t...

Страница 10: ...asurement category working voltage and pollution degree requirements of the circuit being tested 2 If basic insulation requirements cannot be met between the terminal to which this device is connected...

Страница 11: ...y environment The sensor head is a precision assembly including a molded component a ferrite core and a Hall effect element It may be damaged if subjected to sudden changes in ambient temperature or m...

Страница 12: ...rature to rise leading to damage to the sensor For example when one side of a go and return conductor is clamped and the other side is also placed near the sensor head as shown in the drawings below e...

Страница 13: ...requires cleaning disconnect it from the oscilloscope and clean it with a soft cloth dampened with a mild soap and water solution Make sure the probe is completely dry before reconnecting it to the o...

Страница 14: ...nductor being measured and carries out the actual current measurement It is a precision assembly including a molded component a ferrite core and a Hall effect element It may be damaged if subjected to...

Страница 15: ...nning a measurement after demagnetizing always carry out a zero adjustment 8 Output connector Connect to the BNC input connector of the oscilloscope 9 Power plug Connect this to the Agilent N2779A Pow...

Страница 16: ...e actual current measurement It is a precision assembly including a molded component a ferrite core and a Hall effect element It maybe damaged if subjected to sudden changes in ambient temperature or...

Страница 17: ...stment dial 6 BNC output connector Connect to the BNC input connector of the oscilloscope 7 Power plug Connect this to the N2779A power supply receptacle to supply power to the sensor terminator 8 Bar...

Страница 18: ...fications Warranted N2780A B N2781A B N2782A B N2783A B Amplitude accuracy DC or 45 to 66 Hz up to maximum continous current 1 0 of reading 500 mA at 23 oC 3 oC 1 0 of reading 100 mA at 23 oC 3 o 1 0...

Страница 19: ...0 MHz band measuring instrument Equivalent to 25 mA rms or less Equivalent to 25 mA rms or less Equivalent to 2 5 mA rms or less Equivalent to 2 5 mA rms or less Input impedance Typical characteristic...

Страница 20: ...ture and humidity range 0 o C to 40 o C 32 o F to 104 o F 80 rh or less no condensation Storage temperature and humidity range 10 oC to 50 oC 14 oF to 122 oF 80 rh or less no condensation Bearable sto...

Страница 21: ...Frequency Response Characteristic N2780A B Figure 2 Derating according to frequency N2780A B Frequency Hz Amplitude 0dB 1V Frequency Hz Maximum input current Arms Continuous Maximum Input medium_stan...

Страница 22: ...tion Impedance N2780A B Figure 4 DC Accuracy Characteristic N2780A B Frequency Hz Insertion impedance 5 4 3 2 1 0 1 2 3 4 5 0 1 1 10 100 1000 DC Current A Deviation upper limit lower limit N2780A medi...

Страница 23: ...curacy Characteristic N2780A B Figure 6 Frequency Response Characteristic N2781A B 5 4 3 2 1 0 1 2 3 4 5 0 1 1 10 100 1000 AC Current Deviation upper limit lower limit N2780A Frequency Hz Amplitude 0d...

Страница 24: ...gure 7 Derating according to frequency N2781A B Figure 8 Insertion Impedance N2781A B Frequency Hz Maximum input current Arms Continuous Maximum Input Frequency Hz Insertion impedance medium_standard...

Страница 25: ...re 10 AC Amplitude Accuracy Characteristic N2781A B 5 0 5 10 15 20 25 0 1 1 10 100 1000 DC Current A Deviation upper limit lower limit N2781A 5 0 5 10 15 20 25 0 1 1 10 100 1000 AC Current Deviation u...

Страница 26: ...Frequency Response Characteristic N2782A B Figure 12 Derating according to frequency N2782A B Frequency Hz Amplitude 0dB 1V Frequency Hz Maximum input current Arms Continuous Maximum Input medium_sta...

Страница 27: ...ion Impedance N2782A B Figure 14 DC Accuracy Characteristic N2782A B Frequency Hz Insertion impedance 5 0 5 10 15 20 25 0 001 0 01 0 1 1 10 100 DC Current A Deviation upper limit lower limit N2782A me...

Страница 28: ...uracy Characteristic N2782A B Figure 16 Frequency Response Characteristic N2783A B 5 0 5 10 15 20 25 0 001 0 01 0 1 1 10 100 AC Current Deviation upper limit lower limit N2782A Frequency Hz Amplitude...

Страница 29: ...ure 17 Derating according to frequency N2783A B Figure 18 Insertion Impedance N2783A B Frequency Hz Maximum input current Arms Continuous Maximum Input Frequency Hz Insertion impedance medium_standard...

Страница 30: ...C Amplitude Accuracy Characteristic N2783A B 20 15 10 5 0 5 10 15 20 0 001 0 01 0 1 1 10 100 DC Current A Deviation upper limit lower limit N2783A 6 3 0 3 6 9 12 0 001 0 01 0 1 1 10 100 AC Current Dev...

Страница 31: ...trace to the zero position 2 Set the input coupling of the oscilloscope to DC CAUTION Before turning on the power make sure that the voltage of the power supply being used matches the supply voltage i...

Страница 32: ...t is not possible in step 6 turn the coarse adjustment trimmer to bring the trace within the range of adjustment by the zero adjustment dial CAUTION When disconnecting the output connector be sure to...

Страница 33: ...n the clamp so that the conductor is in the center of the sensor aperture 4 Press the opening lever on the sensor head until the UNLOCK indication disappears Also check that the opening lever is firml...

Страница 34: ...s not exceed the rated continuous maximum continuous input for an extended period of time may result in activation of the safety circuit to prevent damage resulting from heating of the sensor At high...

Страница 35: ...When opening the sensor head of the probe be sure to operate with the opening lever If an upper core is forced to open when the sensor head is locked the open close mechanism can be damaged medium_sta...

Страница 36: ...ndicate a malfunction Oscillation can be stopped and operation restored to normal by opening and closing the sensor head Depending on the measured current frequency some sound maybe produced by resona...

Страница 37: ...s taken on the high voltage side of circuits If this occurs reduce the frequency range of the waveform measuring instrument or clamp onto the low voltage side of the circuit as appropriate High Power...

Страница 38: ...38 N2780 81 82 83 User s and Service Guide medium_standard book Page 38 Friday September 10 2010 2 45 PM...

Страница 39: ...39 Agilent Technologies Agilent N2780A B N2781A B N2782A B and N2783A B Current Probes User s and Service Guide 2 Service Guide medium_standard book Page 39 Friday September 10 2010 2 45 PM...

Страница 40: ...the current probe Name and address of the owner Current probe model number Description of service required or failure indications 2 Retain all accessories 3 Return the current probe in its original s...

Страница 41: ...er Supply No substitute Agilent N2779A Digital Multimeter DMM AC DC voltage and current measurement accuracy better than 0 1 of reading at 10 mA Input resistance in AC DC voltage mode 1 M Agilent 3440...

Страница 42: ...a diameter of about 4 inches 10 cm using transformer wire Amplitude Accuracy Test The following procedure measures the accuracy of the current probe 1 Connect the equipment as shown below Allow all i...

Страница 43: ...tor 3 Configure the DMM to measure AC Volts 4 Clamp the probe around the coil and ensure that the probe is as perpendicular as possible to the coils of wire 5 Set up the signal generator as follows Wa...

Страница 44: ...the Calculated Amperes column for the probe you are measuring 8 Compare this value to the Passing Range values to determine if the probe passes the test Table 2 N2780A B N2781A B N2782A B N2783A B 6 5...

Страница 45: ...medium_standard book Page 45 Friday September 10 2010 2 45 PM...

Страница 46: ...nt Technologies Inc 2010 Printed in Malaysia August 2010 Fifth Edition August 2010 N2780 97004 N2780 97004 www agilent com Agilent Technologies medium_standard book Page 46 Friday September 10 2010 2...

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