Keysight 1147B, User Manual

Page 1: ...Keysight 1147B 50 MHz Current Probe User s Guide ...

Page 2: ...ocu ment are furnished under a license and may be used or copied only in accordance with the terms of such license Restricted Rights Legend If software is for use in the performance of a U S Gov ernment prime contract or subcontract Software is delivered and licensed as Commercial computer software as defined in DFAR 252 227 7014 June 1995 or as a commercial item as defined in FAR 2 101 a or as Re...

Page 3: ...ntents Introduction 5 Safety 6 Description of Parts 11 Using the Probe 13 Performance Verification for 1147B Probe 17 Characteristics and Specifications 21 Product Markings and Labels 24 Service Strategy 25 ...

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Page 5: ...rrent transformer The 1147B is ideal for acquiring high transient time signals such as those found in motor controllers in switching power supplies and in current amplifiers driving inductive loads In order to use this product effectively and to ensure a long operational life read this user s guide carefully and retain it for future reference Features Highly accurate current detection Split core c...

Page 6: ...rm maintenance on the instrument When maintenance can be performed without power applied the power cord must be disconnected from the instrument WARNING To avoid short circuits and accidents that could result in injury or death use the 1147B only with power lines carrying 300V or less WARNING When conductors being measured carry in excess of the safe voltage level SELV E and not more than 300V to ...

Page 7: ... is connected and other AutoProbe interfaces of the measuring instrument make sure that the voltage input to the AutoProbe interfaces does not exceed the safe voltage level SELV E Read and observe all warnings and precautions relating to electrical safety for the Infiniium WARNING Refer to the following standards regarding the meanings of underlined terms IEC61010 1 IEC61010 2 031 and IEC61010 2 0...

Page 8: ...sulting from heating of the sensor WARNING At high ambient temperatures the built in safety circuit may activate at current input levels below the rated continuous maximum WARNING Continuous input of current exceeding the rated maximum or repeated activation of the safety function may result in damage to the unit WARNING Do NOT measure current such that the total probe current consumption exceeds ...

Page 9: ...If exposed to such conditions the unit may be damaged the insulation may deteriorate and the unit may no longer satisfy its specifications CAUTION Before using the unit inspect it and check the operation to make sure that the unit was not damaged due to poor storage or transport conditions If damage is found contact your dealer or Keysight representative CAUTION This unit is not constructed to be ...

Page 10: ...ing the sensor cables CAUTION Gently wipe dirt from the surface of the unit with a soft cloth moistened with a small amount of water or mild detergent Do not try to clean the unit using cleaners containing organic solvents such as benzine alcohol acetone ether ketones thinners or gasoline They may cause discoloration or damage CAUTION To avoid scratching the surfaces of the Hall effect elements ke...

Page 11: ...ferrite core and a Hall effect element It may be damaged if subjected to sudden changes in ambient temperature or mechanical strain or shock Care should be exercised when handing the sensor head Demagnetizing Switch DEMAG This demagnetizes the core if it has been magnetized by switching the power on and off or by an excessive input Always carry out demagnetizing before measurement The demagnetizin...

Page 12: ...f the probe offset is outside the range of the zero adjustment dial NOTE The output of this unit is terminated internally The high impedance such as 1 MΩ input impedance will be automatically selected on the Infiniium as the Terminator is plugged into the AutoProbe interface With an input impedance of 50 Ω accurate measurement is not possible NOTE The probe output sensitivity 0 1 V A will be autom...

Page 13: ...oscilloscopes for example the DSO80000 or 90000 series oscilloscopes The input coupling is automatically selected to DC as the Terminator is plugged into the AutoProbe interface NOTE Immediately after powering on this probe may be subject to an appreciable offset drift due to the effect of self heating To counteract this allow the probe to warm up for about 30 minutes before carrying out measureme...

Page 14: ...f circuits If this occurs reduce the frequency range of the measuring instrument or clamp onto the low voltage side of the circuit as shown in Figure 5 on page 15 as appropriate CAUTION Always use the opening lever when opening the probe s sensor head If an upper core is forced to open when the sensor head is locked the open close mechanism can be damaged NOTE When performing continuous measuremen...

Page 15: ...n the center of the clamp aperture NOTE Before making a measurement press the opening lever until the UNLOCK indication disappears and check that the sensor head is properly closed If the sensor head is not properly closed accurate measurement will not be possible NOTE Accurate measurement may be impossible in locations subject to strong external magnetic fields such as transformers and high curre...

Page 16: ... on the channel to which the probe is connected Wait until this waveform is no longer displayed 6 When the demagnetization waveform is no longer displayed adjust the ZERO ADJ control on the probe terminator to move the trace for the channel to which the probe is connected as close as possible to the 0V position If the ZERO ADJ control cannot center the trace adequately then do the following a Move...

Page 17: ...nted in this chapter Table 1 Required Test Equipment Description Minimum Requirements Recommended Test Equipment Oscilloscope Bandwidth 250 MHz Amplitude accuracy 0 4 Infiniium oscilloscope with 1 MΩ input Two Digital Multimeters Keysight U1251B Handheld Digital Multimeter or equivalent DVM DMM AC Current Generator AC 10 Arms 50 Hz sine wave Amplitude accuracy 0 3 Keysight AC6800 or Wavetek 9100 P...

Page 18: ...ect the test setup as shown in Figure 7 on page 19 as per the following substeps a Clamp the 1147B probe around the test cable 1 and lock the sensor head of the probe b Press the DEMAG button on the probe c Set the digital multimeter DMM 1 to Arms mode d Connect the test cable 1 to the positive terminal of the AC current generator s OUTPUT terminal block and to the current input of the DMM 1 e Con...

Page 19: ...ent Generator 5 Set the DMM 2 to Vrms mode 6 As displayed in Figure 8 on page 20 connect a BNC cable to the a N1022B adapter s output using the NMD 3 5mm M to 3 5mm F adapter and 3 5mm M to BNC F adapter b DMM 2 using a BNC F to banana adapter This completes the test setup ...

Page 20: ...e Test Setup 7 Measure the current and record Vrms output of the probe as displayed on the DMM 2 8 Calculate gain as follows Gain Vrms Arms Gain should be between 0 99 and 1 01 1 gain accuracy 9 Remove the test cable and AC current generator from the 1147B probe ...

Page 21: ...n 4000X 6000X Series 15A peak 15ADC 10Arms continuous 30A peak non continuous per each channel Refer to frequency derating curve Figure 10 on page 23 Maximum peak current 50A for Pulse Widths 10µs Probe sensitivity 0 1V A Noise 2 5 mArms with 20 MHz Bandwidth limiting Insertion impedance Refer to Figure 11 on page 23 Temperature coefficient 2 0 C to 40 C Effect of external magnetic fields Equivale...

Page 22: ...175 mm x 18 mm x 40 mm 6 89 in x 0 71 in x 1 6 in Dimensions Terminator 28 mm x 81 mm x 24 mm 1 1 in x 3 2 in x 0 94 in Weight 210 g 7 4 oz Accessories supplied Storage case calibration certificate Table 5 Environmental Characteristics Item Characteristics Use Indoor Operating temperature range 0 C to 40 C 32 F to 104 F Storage temperature range 10 C to 50 C 14 F to 122 F Maximum relative humidity...

Page 23: ...Characteristics and Specifications 23 Figure 9 Frequency Characteristic Figure 10 Derating According to Frequency Figure 11 Insertion Impedance ...

Page 24: ...ymbol indicates the Environmental Protection Use Period EPUP for the product s toxic substances for the China RoHS requirements The CE symbol indicates the European Community CAUTION Risk of Danger Refer to this manual for more information This mark indicates the Australian Spectrum Management Agency WEEE Directive notice This marking is on a notice sticker and is not actually fixed to the product...

Page 25: ...g and attach it to the probe Name and address of the owner Probe model number Description of service required or failure indications 2 Retain all accessories 3 Return the probe in its case or pack the probe in foam or other shock absorbing material and place it in a strong shipping container You can use the original shipping materials or order materials from a Keysight Technologies Inc Sales Offic...

Page 26: ...Service Strategy 26 ...

Page 27: ...ternal magnetic fields 15 21 F Frequency Characteristic 23 H high frequencies 14 high transient time signals 5 I IEC 61010 1 Safety Standards 6 impedance insertion 21 insertion impedance 21 23 inspection 5 instrument markings 24 ISM1 A 24 L labels 24 M maximum altitude 22 maximum cable diameter 22 maximum circuit voltage 21 maximum current 21 maximum peak current 21 maximum relative humidity 22 me...

Page 28: ...ELV E 6 sensitivity 21 sensor cable length 22 sensor head 11 service 25 sound 15 storage temperature range 22 T temperature coefficient 21 temperature range 22 U use 22 using 14 V vibration 22 W weight 22 Z ZERO ADJ 12 16 zero adjustment dial 12 ...