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Tektronix A6312 Instructions Manual

100 mhz ac/dc current probe
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Instructions
A6312
100 MHz AC/DC Current Probe
070-9603-02
.
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.com

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  • Page 1 Instructions A6312 100 MHz AC/DC Current Probe 070-9603-02 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.
  • Page 2 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...
  • Page 3 Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located.
  • Page 5 H Eliminates unexpected service expenses For Information and Ordering For more information or to order Service Assurance, contact your Tektronix representative and provide the information below. Service Assurance may not be available in locations outside the United States of America.

  • Page 7: Table Of Contents

    Using the Replaceable Parts List ........A6312 Instructions...
  • Page 8 Figure 7: A6312 Probe jaw dimensions (nominal) ....Figure 8: Bandwidth test setup for the A6312 current probe ..Figure 9: Rise time test setup for A6312 .
  • Page 9 ....Table 11: DC gain accuracy test work sheet for A6312 ...
  • Page 10 Table of Contents A6312 Instructions...

  • Page 11: General Safety Summary

    Do Not Operate With Suspected Failures. If you suspect there is damage to this Precautions product, have it inspected by qualified service personnel. Do Not Immerse in Liquids. Clean the probe using only a damp cloth. Refer to cleaning instructions. A6312 Instructions...
  • Page 12 (Earth) Terminal uninsulated conductor that is HAZARDOUS LIVE. Breakable. Use only on an Do not drop. insulated wire. Certifications and Refer to the specifications section for a listing of certifications and compliances Compliances that apply to this product. A6312 Instructions...

  • Page 13: Preface

    Preface This instruction manual supports the operation and maintenance of the A6312 Current Probe with any of the AM503 series current probe amplifiers. You can find additional documentation supporting the operation and maintenance of the AM 503 series amplifiers in the following manuals:...

  • Page 14: Contacting Tektronix

    6:00 a.m. - - 5:00 p.m. Pacific time This phone number is toll free in North America. After office hours, please leave a voice mail message. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web site for a list of offices. viii...

  • Page 15: Getting Started

    Getting Started The A6312 is a DC to 100 MHz current probe designed for use with the AM503 series current probe amplifiers. With the AM503A amplifier, you can measure frequencies up to 80 MHz. With the AM503, AM503B, and AM5030 amplifiers, you can measure frequencies up to 100 MHz.

  • Page 16: Operating The Current Probe Slide

    To avoid injury or equipment damage, remove power from an uninsulated wire before clamping the current probe around it. Also, never disconnect the probe from the amplifier when the probe is connected to a live conductor. A6312 Instructions...

  • Page 17: Degaussing And Autobalancing The Current Probe

    1. Verify that the current probe is connected to the amplifier. 2. Remove the current probe from the conductor under test. 3. Lock the probe slide closed (see Figure 2). 4. Press the amplifier PROBE DEGAUSS AUTOBALANCE button. A6312 Instructions...

  • Page 18: Maximum Current Limits

    For example, the A6312 current probe has a maximum Ampere-second product of 100 A⋅ s. If a pulse measured with an A6312 has a peak current of 40 A, the maximum allowable pulse width would be 100 A⋅ s divided by 40 A, or 2.5 s.

  • Page 19: Figure 3: Applying The Amp-Second Product Rule

    Getting Started Maximum Do not exceed pulsed current Pulse width at 50% Pulse width at 50% Maximum continuous current (a) Maximum allowable pulse width (b) Maximum allowable pulse amplitude Figure 3: Applying the amp-second product rule A6312 Instructions...
  • Page 20 For example, the A6312 current probe has a maximum Ampere-second product of 100 A⋅ s. If a pulse measured with an A6312 probe has a width of 3 s, the maximum allowable peak current would be 100 A⋅ s divided by 3 s, or 33.3 A.

  • Page 21: Specifications

    22. The bandwidth of the measurement instrument must be ≤ 500 MHz. Mechanical, electrical, and environmental characteristics for the A6312 current probe are listed in Tables 2 through 4 and Figures 4 through 7. Table 2: Electrical characteristics...

  • Page 22: Figure 4: A6312 Specified Operating Area

    Maximum continuous input (≤20 A) Any width Allowable pulse width (microseconds) Figure 4: A6312 specified operating area 1 kHz 10 kHz 100 kHz 1 MHz 10 MHz 100 MHz Frequency Figure 5: A6312 frequency derating curve for maximum input current A6312 Instructions...

  • Page 23: Figure 6: A6312 Insertion Impedance Curve

    Height: 3.2 cm (1.25 inches) Cable length 2 m (6.6 feet) Weight 255 g (0.56 lbs) Maximum Wire Size 3.8 mm (0.15 in) 11.9 mm (0.470 in) 18.9 mm (0.745 in) Figure 7: A6312 Probe jaw dimensions (nominal) A6312 Instructions...

  • Page 24: Table 4: Environmental Characteristics

    Operating 0.31 g , 5 to 500 Hz, 10 minutes on each axis Tektronix Std. 062- - 2858- - 00, Rev. B, Class 3 Table 5 lists the product certifications and compliances. Table 5: Certifications and compliances EC Declaration of Conformity Meets intent of Low Voltage Directive 73/23/EEC for Product Safety.

  • Page 25: Performance Verification

    Tolerances that are specified in these procedures apply to the AM503 series current probe amplifiers and the A6312 current probe and do not include test equipment error. The recommended calibration interval is one year.

  • Page 26: Required Test Equipment

    50 Ω, BNC Connector Calibration fixture 015-0601-50 Current loop 20 turns 27 AWG coated wire Refer to page 19. 50 Ω, ±0.1%, 0.5 W Termination 011-0129-00 50 Ω, 1.05 m (42 in) long BNC cable 012-0057-01 BNC-to-Dual 103-0090-00 Banana Adapter A6312 Instructions...
  • Page 27 H If you select the AM503 amplifier, you must verify the probe and AM503 as a system. The procedures verify the A6312 probe to 100 MHz and the probe is not interchangeable with any other amplifier or system.

  • Page 28: Bandwidth

    Performance Verification Bandwidth This procedure tests the bandwidth of the A6312 current probe. In this test you measure a signal at a relatively low frequency and again at the rated bandwidth of the probe. The two measurements are compared to verify that the signal amplitude does not fall below - -3 dB at the probe bandwidth.
  • Page 29 6. Set the oscilloscope time base to 5 ns/division. Increase the signal generator frequency to the warranted bandwidth. Refer to Table 1 on page 7. 7. Using the peak-peak measurement capability of the oscilloscope, measure and record the peak-peak reading as M A6312 Instructions...

  • Page 30: Rise Time

    9. Verify that the bandwidth is greater than the warranted specification. Refer to Table 1 on page 7. Rise Time This procedure measures the rise time of the A6312 current probe. In this test you directly measure the rise time of a step input. Refer to Figure 9 when making equipment connections.

  • Page 31: Figure 9: Rise Time Test Setup For A6312

    50 Ω input Calibration fixture Figure 9: Rise time test setup for A6312 1. Using a 50 Ω BNC cable, connect the amplifier output to a 50 Ω oscillo- Equipment Connections scope input. If the input impedance of your oscilloscope is 1 MΩ, connect a 50 Ω...
  • Page 32 4. The system rise time (t system) is the rise time of the displayed signal when output of the pulse generator is connected directly to the oscilloscope input. (The current probe and amplifier are excluded.) A6312 Instructions...

  • Page 33: Dc Gain Accuracy

    6. Verify that the probe rise time is less than the warranted specification. Refer to Table 1 on page 7. NOTE. When using the A6312 on an AM503, you can optimize the pulse response by adjusting R364 (HF COMP) located inside the AM503 amplifier. Refer to the AM503 Instruction Manual (070-2052-XX) for instructions on how to access this adjustment.

  • Page 34: Figure 10: Dc Gain Accuracy Test Setup For A6312

    50 Ω termination flow Probe 50 Ω coaxial cable Figure 10: DC gain accuracy test setup for A6312 Equipment Settings Make or verify the equipment settings in Table 9: Table 9: Equipment settings for DC gain accuracy Digital multimeter Measurement type...

  • Page 35: Table 10: Dc Gain Accuracy Test For A6312

    Table 11 on page 23 to record the results of your measurements.) e. Set the current source for the correct negative test current using Table 10. Table 10: DC gain accuracy test for A6312 Turns of current Current probe...

  • Page 36: Probe Trim Adjust For Gain Accuracy (Am503B And Am5030 Only)

    0. or 1. are omitted. If the first digit displayed is 7, 8, or 9, then the leading digit must be 0. If the first digit displayed is 0, 1, or 2, then the leading digit must be 1. A6312 Instructions...

  • Page 37: Table 11: Dc Gain Accuracy Test Work Sheet For A6312

    Performance Verification Table 11: DC gain accuracy test work sheet for A6312 Turns of current Current probe Current source Test current loop passing amplifier %Error output through probe current/division ±250 A 1 mA 10 mA ±500 A 2 mA 20 mA ±1.25 mA...

  • Page 38: Dc Offset Adjustment

    DC Offset Adjustment The following adjustment procedures describe how to adjust the DC offset of the A6312 using the AM503, AM503A, AM503B or AM5030 amplifiers. Toler- ances that are specified in these procedures apply to the current probes and do not include test equipment error.

  • Page 39: Equipment Connections

    3. Do not clamp the current probe around a conductor, but make sure the jaws are locked shut. AM503B or AM5030 Use the following procedure to adjust the DC offset of the A6312 current probe when using an AM503B or AM5030 current probe amplifier. Equipment Settings...

  • Page 40: Table 14: Am 503B/Am 5030 Error Codes Requiring Dc Offset Adjustment

    9. Adjust the DC Offset control so that the oscilloscope trace is on the center graticule line (zero offset), ± 2 divisions. 10. Press and release the 20 MHz BW LIMIT button, then press and release the COUPLING button. This exits the AM503B and AM5030 test mode. A6312 Instructions...

  • Page 41: Am503A

    DC Offset Adjustment AM503A Use the following procedure to adjust the DC offset of the A6312 current probe when using an AM503A current probe amplifier. Equipment Settings Make or verify the equipment settings in Table 15: Table 15: AM503A settings for DC offset adjustment...

  • Page 42: Table 16: Am503A Error Codes Requiring Dc Offset Adjustment

    8. Press and release the 20 MHz BW LIMIT button. This sets the AM503A internal offsets to zero. 9. Adjust the A6312 DC Offset control so that the oscilloscope trace is on the center graticule line (zero offset), ± 2 divisions.

  • Page 43: Am503

    6. Set the AM503 input coupling to DC. 7. Set the AM503 BALANCE adjustment to mid- -position. 8. Adjust the A6312 DC Offset control so that the oscilloscope trace is on the center graticule line (zero offset), ± 2 divisions.

  • Page 44: Maintenance

    Maintenance This section explains how to clean the A6312 current probe and, if necessary, disassemble the probe for maintenance or repair. Also included are instructions for preparing the probe for shipment. WARNING. Probe disassembly should only be performed by qualified service personnel.

  • Page 45: Figure 12: Removing The Strain Relief Boot

    3. Hold the probe in a top-up horizontal position and slide the top half of the probe body off as shown in Figure 13. 4. Remove the metal ball. 5. Turn the probe upside down, push the slide back slightly, and remove the slide (see Figure 14). A6312 Instructions...

  • Page 46: Figure 13: Removing The Top Half Of The Probe

    (2) Grasp the top half of the probe body here with your other hand, then (a) push the slide back slightly, and (b) withdraw the slide from the probe body Figure 14: Removing the probe slide A6312 Instructions...

  • Page 47: Figure 15: Removing The Current Transformer

    Should the plastic slide assembly require lubrication, sparingly apply silicone-based grease to the parts. Probe reassembly is the reverse of steps 1 through 7. NOTE. Exercise care when fitting the slide back into the probe body; aligning the switch contacts can require patience. A6312 Instructions...

  • Page 48: Obtaining Replacement Parts

    Refer to the Replaceable Parts List on page 35 for more informa- tion. Preparation for Shipment If you must ship your Tektronix product, please use the original packaging if possible. If the original packaging is unfit for use or not available, use the following packaging guidelines: 1.

  • Page 49: Replaceable Parts

    Probe. As described below, use these lists to identify and order replacement parts. Parts Ordering Information Replacement parts are available from or through your local Tektronix, Inc., service center or representative. Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements.
  • Page 50 Indented items are part of, and included with, the next higher indentation. Attaching parts must be purchased separately, unless otherwise specified. Abbreviations Abbreviations conform to American National Standards Institute (ANSI) standard Y1.1. A6312 Instructions...

  • Page 51: Figure 16: A6312 Exploded View

    Replaceable Parts Figure 16: A6312 exploded view A6312 Instructions...

  • Page 52: Replaceable Parts List

    352- - 0106- - 00 HOLDER,SPR RTNR:DELRIN P6042 TK2565 352- - 0106- - 00 - - 5 650- - 3496- - 00 CABLE W/BD ASSY:CABLE W/A6312 PROBE 80009 650- - 3496- - 00 CIRCUIT BOARD,A6312 - - 6 213- - 0087- - 00 SCREW,TPG,TC:2- - 32 X 0.5,TYPE...
  • Page 53 CONNOR FORMED METAL PRODUCTS 1729 JUNCTION AVENUE SAN JOSE, CA 95112 TK1947 NORTHWEST ETCH TECHNOLOGY 2601 S HOOD ST TACOMA, WA 98411- - 0610 PO BOX 110610 TK2565 VISION PLASTICS INC 26000 SW PARKWAY CENTER DRIVE WILSONVILLE, OR 97070 A6312 Instructions...
  • Page 54 Replaceable Parts A6312 Instructions...

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