Instruction Manual P6021 60 MHz Current Probe 070-0947-06 Warning The servicing instructions are for use by qualified personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so. Refer to all safety summaries prior to performing service. www.tektronix.
Copyright © Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077 TEKTRONIX and TEK are registered trademarks of Tektronix, Inc. POSIDRIV is a registered trademark of the Philips Screw Co.
WARRANTY Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of one (1) year from the date of purchase from an authorized Tektronix distributor. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product. Batteries are excluded from this warranty.
Table of Contents P6021 Instruction Manual General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii v Contacting Tektronix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi Operator Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . .
Table of Contents List of Figures Figure 1: The P6021 Probe and termination . . . . . . . . . . . . . . . . . . . . Figure 2: Insertion Impedance of the P6021 . . . . . . . . . . . . . . . . . . . . Figure 3: Probe and termination input current vs. frequency derating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 4: Typical P6021 phase response . . . . . . . . . . . . . . . . . . . . . . . Figure 5: Midband accuracy test setup . . . . . . . . . . . . . . . . . . . . . . .
General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. To Avoid Fire or Personal Injury Connect and Disconnect Properly. Do not connect or disconnect probes or test leads while they are connected to a voltage source. Observe All Terminal Ratings.
General Safety Summary Symbols and Terms Terms in this Manual. These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life. CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property. Terms on the Product. These terms may appear on the product: DANGER indicates an injury hazard immediately accessible as you read the marking.
Service Safety Summary Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any service procedures. Do Not Service Alone. Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present. To avoid electric shock, do not touch exposed connections.
Service Safety Summary Contacting Tektronix Phone 1-800-833-9200* Address Tektronix, Inc. Department or name (if known) 14200 SW Karl Braun Drive P.O. Box 500 Beaverton, OR 97077 USA Web site www.tektronix.com Sales support 1-800-833-9200, select option 1* Service support 1-800-833-9200, select option 2* Technical support Email: techsupport@tektronix.com 1-800-833-9200, select option 3* 1-503-627-2400 6:00 a.m. - 5:00 p.m. Pacific time * vi This phone number is toll free in North America.
Operator Information Thank you for choosing a Tektronix current probe. This manual describes the P6021 current probe with passive termination and provides information about making measurements with the probe. Description The P6021 current probe converts an alternating current waveform to a voltage that can be displayed and measured on an oscilloscope display. The probe provides accurate current measurements over a wide range of frequencies and allows you to measure current without breaking the circuit.
Operator Information P6021 Probe Termination 6” Ground Lead Figure 1: The P6021 Probe and termination Attaching the Probe and Termination to an Oscilloscope Attach the probe to the termination as shown in Figure 1. An alligator-style ground clip is supplied to improve EMI rejection at high frequencies (2 MHz and above). Snap the ground lead to the probe transformer post and attach the alligator clip directly to RF ground.
Operator Information Using the Standard Accessories Your P6021 is shipped with the following accessories: H This instruction manual — Read these instructions to familiarize yourself with the features, specifications, and operation of the P6021 current probe. H 6-inch ground lead — Use the 6-inch ground lead to ground the shield around the probe transformer at the probe end of the cable.
Operator Information Operating Considerations The information in this section will help you make effective use of your P6021 probe. Features and Controls H You can set vertical scale on the oscilloscope to any scale factor, as determined by the signal amplitude. To calculate the overall vertical scale factor for the oscilloscope, probe, and termination, multiply the termination sensitivity control setting by the vertical scale factor of the oscilloscope.
Operator Information Insertion Impedance When you insert a conductor into the probe, you add impedance to the circuit you are measuring. This additional impedance affects signals; this is particularly important if you are measuring fast rise times. Figure 2 illustrates the equivalent circuit with the additional impedance introduced by the P6021. 2.8 H 1.7 nH .
Operator Information Probe Shielding The P6021 is shielded to minimize the effect of external magnetic fields. However, strong fields can interfere with the current signal being measured. If you suspect that an external field is interfering with your measurement, remove the probe from the conductor, but keep it in the same location as when you made the suspect measurement.
Service Information Warranted Characteristics This section lists the various warranted characteristics that describe the P6021 Current Probe. Included are warranted electrical and environmental characteristics. Warranted characteristics are described in terms of quantifiable performance limits which are warranted. The electrical characteristics listed in Table 1 apply under the following conditions: NOTE. The probe and instrument must be in an environment whose limits are described in Table 2.
Service Information Table 3: Maximum ratings Characteristic Information Maximum continuous (CW) current Refer to Figure 3 for frequency derating curves 2 mA/mV 5 Ap-p sine wave between 1.2 kHz and 5 MHz 10 mA/mV 15 Ap-p sine wave between 300 Hz and 5 MHz Maximum Pulse Current 250 A peak, not to exceed 500(A · s) or 5 ARMS.
Service Information Table 4: Certifications and compliances EC Declaration of Conformity — Low Voltage Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities: Low Voltage Directive 73/23/EEC, as amended by 93/68/EEC EN 61010-1/A2 Part 1: General Requirements Safety requirements for electrical equipment for measurement, control, and laboratory test EN 61010-2-032:1995 Part 2-032: Particular requirements for hand-held current clamps for el
Service Information Table 5: Electrical characteristics (Cont.) Characteristic Information Maximum DC saturation 0.5 A Signal Delay 5-foot probe with termination Approximately 9 ns Insertion Impedance 0.03 Ω or less at 1 MHz, increasing to 1.0 Ω or less at 60 MHz Probe Rise Time ≤5.
Service Information Frequency 100 Hz 1 kHz 10 kHz 100 kHz 1 MHz 10 MHz 100 MHz 100 50 Degrees 0 ---50 ---100 Termination at 10 mA Termination at 2 mA ---150 ---200 Figure 4: Typical P6021 phase response P6021 Instruction Manual 11
Service Information Circuit Description This section describes the circuits in the P6021 current probe and termination. Current Probe The P6021 current probe consists of a current transformer mounted in the nose of the probe head case, an impedance-matching network, and an internal switch to disconnect the transformer shield from ground. The transformer contains a two-section U-shaped ferrite core.
Service Information Probe Performance WARNING. To avoid personal injury and damage to the probe, remove the probe from any signal source before attempting to adjust or service the probe. This probe should be serviced only by qualified service personnel. Do not service electrical equipment alone. If you must service or adjust equipment that is attached to a signal or power source, do so only when another person capable of rendering first aid and resuscitation is present.
Service Information Table 7: Equipment list Item Description Oscilloscope Recommended equipment1 TDS 420A, TDS 303X, or TDS 305X Bandwidth DC to ≥200 MHz Vertical sensitivity 1 mV/div Measurement functions Amplitude averaging Calibration generator Fast Rise Step ≤1 ns, 1 VP-P into 50 Ω Wavetek 9100 with option 100:250 or Tektronix PG 506A Sinewave Voltage 5 VP-P into 50 Ω (100 mA), 120 Hz to >60 MHz, 1.
Service Information Performance Verification Check Midband Accuracy. Refer to Figure 5 when making equipment connections. DMM + -- Step 7 Step 2, Step 6 BNC-to-dual banana adapter Termination for P6021 probe BNC “T” connection P6021 probe Calibration fixture Calibration generator Leveled Sinewave Output Coax cable Note: If using a Wavetek 9100, use the Signal Out BNC connector on the rear of the instrument. Figure 5: Midband accuracy test setup 1.
Service Information 7. Connect the P6021 termination and probe to the BNC-to-dual banana adapter. 8. Connect the probe to the calibration fixture. 9. Record the DMM output as M2. 10. Calculate the % of error: Itest = M1 50 Ω %Error = 2 × M2 − Itest × 100 Itest 11. Record the results in the test record and compare the results on page 20 against the midband specification on page 7. 12. Set the P6021 termination sensitivity to 10 mA/mV. 13. Record the DMM output as M3. 14.
Service Information 9. Measure and record the DMM output as M1 in Table 8. 10. Set the Leveled Sinewave Output of the calibration generator to 450 Hz. 11. Measure and record the DMM output as M2 in Table 8. 12. Calculate the low frequency bandwidth ratio: low frequency bandwidth ratio = M2 M1 13. Record the results in the test record on page 20 and compare the results against the low frequency specification on page 20. 14. Set the P6021 termination sensitivity to 10 mA/mV. 15.
Service Information Check High Frequency Bandwidth. Refer to Figure 6 when making equipment connections. Test oscilloscope CH 1 P6021 probe Calibration generator Calibration fixture Coax cable Termination for P6021 probe Leveled Sinewave Output Note: If using a Wavetek 9100, use the Signal Out BNC connector on the rear of the instrument. Figure 6: High frequency bandwidth test setup 1. Set the P6021 termination sensitivity to 2 mA/mV. 2.
Service Information 13. Measure and record the oscilloscope amplitude Auto Measurement as M2 in Table 9. 14. Calculate the high frequency bandwidth ratio: high frequency bandwidth ratio = M2 M1 15. Record the results in the test record on page 20 and compare the results against the high frequency specification page 20. 16. Set the P6021 termination sensitivity to 10 mA/mV. 17. Set the oscilloscope Vertical Deflection to 2 mV/div. 18. Set the oscilloscope Horizontal Scale to 10 s/div. 19.
Service Information P6021 Test Record Photocopy this form and use it to record the performance test results. P6021 test record Instrument Serial Number: Temperature: Date of Calibration: Certificate Number: Relative Humidity %: Technician: Performance test Range, mA/mV Minimum Midband Accuracy (% Error) 2 - 3% +3% 10 - 3% +3% 2 0.707 — 10 0.707 — 2 0.707 — 10 0.
Service Information Adjustment Procedure If the probe does not pass the performance verification procedure or you want to optimize the performance of the probe, perform the following adjustment procedure: Preparation 1. Insert a small screwdriver between the cover and the termination near the part number, and gently pry up the top cover of the P6021 termination by twisting the screwdriver. Leave the bottom cover on, since it must be in place when the termination is in use. 2.
Service Information 6. Connect the probe to the current probe calibration fixture. Figure 7 shows the proper probe orientation to the current probe calibration fixture. Probe Calibration fixture Figure 7: Connecting the probe to the calibration fixture 7. The following adjustments affect aberrations and flat-top response: C13, R10, and R12 of the probe (see Figure 8) and C22, C25, and R36 of the termination (see Figure 9).
Service Information R12 R10 C13 Probe (back) P6021 AC CURRENT PROBE 125 TURNS TEKTRONIX, INC Figure 8: Location of probe adjustments R36 C22 C25 Figure 9: Location of termination adjustments 8. Set the termination sensitivity control to the 10 mA/mV position. 9. Set the oscilloscope Vertical Deflection to 1 mV/division. 10. Readjust adjustments as needed to ensure the optimum pulse response on both sensitivity settings.
Service Information Maintenance The information in this section will help you maintain your probe for a long service life. CAUTION. To prevent damage to probe materials, avoid using chemicals that contain benzene, benzine, toluene, xylene, acetone, or similar solvents. To avoid degrading the performance of the probe, do not lubricate the polished mating surfaces of the transformer. Cleaning To clean the probe body, use a soft cloth dampened in a solution of mild detergent and water.
Service Information Upper half of probe body Spring retainer Spring Ball bearing PoziDriv screws (2X) Detent Spring retainer holder Slide switch Cable Circuit board Strain relief boot Top half of transformer Bottom half of transformer Bottom housing Probe nose Figure 10: Disassembling the probe 1. Hold the probe horizontally with the slide switch up. 2. Move the strain relief boot back over the cable. 3. Be careful not to lose the small ball bearing you are about to expose. 4.
Service Information 8. Remove the two PoziDriv screws that secure the spring retainer holder to the probe body; then remove the small black plastic holder. 9. Lift the circuit board, transformer, and cable out of the probe body as a unit. If you need to, you can unplug the transformer from the circuit board. 10. To reassemble the probe, reverse the procedure above.
Service Information 4. Remove the circuit board from the termination and repair it as you require, being careful to use a minimum of heat and observe normal circuit board procedures. 5. Replace the circuit board by reversing the above procedure. 6. Align the switch with the slider in the front cover, and replace the front cover.
Service Information 28 P6021 Instruction Manual
Replaceable Electrical Parts This section contains a list of the electrical components for the P6021. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your local Tektronix field office or representative. Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest improvements.
Replaceable Electrical Parts Parts list column descriptions Column Column name Description 1 Component number The component number appears on diagrams and circuit board illustrations, located in the diagrams section. Assembly numbers are clearly marked on each diagram and circuit board illustration in the Diagrams section, and on the mechanical exploded views in the Replaceable Mechanical Parts list section.
Replaceable Electrical Parts Manufacturers cross index Mfr.
Replaceable Electrical Parts Replaceable electrical parts list Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number Figure 11 A1 670-- 1117-- 00 CIRCUIT BD ASSY:PROBE 80009 670111700 A1C13 281-- 0122-- 00 CAP,VAR,CER DI:2.5-- 9PF,100V 59660 518-- 000A2.
Replaceable Electrical Parts A1T14 A1 A1C13 A1R13 A1L14 A1R14 A1R10 A1R12 A1L10 A1L12 A1C14 Figure 11: P6021 probe component location A2L31 A2SW30 A2C30 A2L22 A2 A2R31 A2C22 A2R22 A2R35 A2R33 A2R24 A2R36 A2C25 A2R34 Figure 12: P6021 termination component location P6021 Instruction Manual 33
Replaceable Electrical Parts 34 P6021 Instruction Manual
Replaceable Mechanical Parts This section contains a list of the replaceable mechanical components for the P6021. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your local Tektronix field office or representative. Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest improvements.
Replaceable Mechanical Parts Parts list column descriptions Column Column name Description 1 Figure & index number Items in this section are referenced by figure and index numbers to the exploded view illustrations that follow. 2 Tektronix part number Use this part number when ordering replacement parts from Tektronix. 3 and 4 Serial number Column three indicates the serial number at which the part was first effective. Column four indicates the serial number at which the part was discontinued.
Replaceable Mechanical Parts Manufacturers cross index Mfr.
Replaceable Mechanical Parts Replaceable mechanical parts list Fig. & index number 13-- Tektronix part number Serial no. effective Serial no. discont’d Qty Name & description Mfr. code Mfr. part number 80009 204036702 -------- 1 P6021,PROBE,CURRENT:60 MHZ,250A,5FT W/TERM -1 204-- 0367-- 02 1 .BODY HALF,PROBE:UPPER -2 214-- 0997-- 00 1 .BALL,BEARING:0.094,SST 05469 ORDER BY DESC -3 351-- 0191-- 00 1 .SLIDE,TEST PROD: 80009 351019100 -4 214-- 0835-- 00 1 .SPRING,HLCPS:0.
Replaceable Mechanical Parts 5 4 14 3 1 2 12 11 10 9 8 6 7 13 15 17 16 19 18 20 22 21 23 Figure 13: P6021 exploded view P6021 Instruction Manual 39
Replaceable Mechanical Parts 40 P6021 Instruction Manual
Index A aberrations, 21 accessories, termination, 1, 2 accessories, optional, 3 accessories, standard, 3–6 6-inch ground lead, 3 instruction manual, 3 accuracy, 7 Address, Tektronix, vi adjusting the probe, 22 adjusting the termination, 22 attaching the probe, 1–6 B bandwidth checking, 16, 18, 20 specification, 7 C C13, 22, 23 C22, 22, 23 C25, 22, 23 calibrating the probe, 13–28 Certifications, 9 checking performance, 13 cleaning the probe, 24 Compliances, 9 Contacting Tektronix, vi continuous current, ma
Index M magnetic shielding, 6 maximum continuous current, 8 maximum DC saturation, 10 maximum input voltage, 8 maximum pulse current, 8 mechanical parts list, 35 O oscilloscope, 1–3 impedance, 1 input connectors, 1 use with, 1–6 P parts list electrical, 29 mechanical, 35 Performance Verification, Test Record, P6021, 20 phase response, 11 Phone number, Tektronix, vi physical specifications, 10 cable length, 10 weight, 10 probe adjustments, 21 calibration, 13, 14 circuit description, 12 compatibility with
Index V W vertical scale settings, with oscilloscope, 4 vertical sensitivity, 4, 12 increasing, 5 voltage, maximum, 8 Web site address, Tektronix, vi winding, 5, 12 P6021 Instruction Manual 43
Index 44 P6021 Instruction Manual
