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Guildline 9711A Series Technical Manual

Multi-tap dc current shunt
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Model 9711A Series
Multi-Tap DC Current Shunt
Technical Manual
NOTICE
The contents and information contained in this manual are proprietary to
Guildline Instruments Limited. They are to be used only as a guide to the
operation and maintenance of the equipment with which this manual was
issued and may not be duplicated or transmitted by any means, either in whole
or in part, without the written permission of Guildline Instruments Limited.
TM9711A-D1-00
29 November, 2024

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Summary of Contents for Guildline 9711A Series

  • Page 1 NOTICE The contents and information contained in this manual are proprietary to Guildline Instruments Limited. They are to be used only as a guide to the operation and maintenance of the equipment with which this manual was issued and may not be duplicated or transmitted by any means, either in whole or in part, without the written permission of Guildline Instruments Limited.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Introduction Warranty To Obtain Warranty or Calibration and Repair Service 1.2.1 USA Warranty Return Address 1.2.2 Returns All Other Countries Safety Information 9711A Specifications Uncertainty Specifications General Specifications Overview of the 9711A General Operating Instructions 3.2.1 Maximum Current 3.2.2 Range Selector Plugs 3.2.3...
  • Page 4 Optional Calibration Procedure (Drift Verification) 4-12 4.7.1 Calibration of 300 A (0.333 mOhm) Range 4-12 4.7.2 Calibration of 100 A (1 mOhm) Range 4-12 4.7.3 Calibration of 10 A (10 mOhm) Range 4-13 4.7.4 Calibration of 1 A (100 mOhm) Range 4-13 4.7.5 Calibration of 100 mA and below (1 Ohm) Ranges...

  • Page 5: List Of Figures

    LIST OF FIGURES Figure 1-1: 9711A Terminals Location ..................4-2 Figure 1-2: 9711A Connections ....................4-6 Figure 5-1: 9711A Schematic Layout ..................5-4 LIST OF TABLES Table 2-1: List of Recommended Test Currents or Voltages For Resistance Values Table 4-5 : 9711A Nominal Calibration Data Worksheet 4-10 Table 4-3 : 9711A Optional Calibration Data Worksheet 4-15...
  • Page 6 TM9711A-D1-00 29 November, 2024...

  • Page 7: Introduction

    Guildline Instruments. In addition, systems engineered by Guildline Instruments are warranted to be free of defects in overall system operation for a period of two (2) years from the date of receipt by the original purchaser.

  • Page 8: Limitation Of Warranty

    Guildline Instruments will pay for all warranty costs including shipping to and from the original shipment point. However, if the instrument is purchased within one country and shipped to another, Guildline will only pay for shipping to and from the original ship to country or customer point. 1.2.1...

  • Page 9: Returns All Other Countries

    Section 1 1.2.2 Returns All Other Countries For all other countries, including Canada please ship to: Guildline Instruments Limited 21 Gilroy Street, PO Box 99 Smiths Falls, ON K7A 4S9 Mark on the outside of the box: RMA # _____________...
  • Page 10 Section 1 TM9711A-D1-00 29 November, 2024...

  • Page 11: 9711A Specifications

    Section 2 9711A SPECIFICATIONS 2.1 Uncertainty Specifications The specifications apply from Full Rate Current down to 10% of the full rated current. For example the 300 A Range can be used from 300 A down to 30 A or the 100 A Range can be used down to 10 A. Ensure current cables used can handle the full rated current.
  • Page 12 Section 2 TM9711A-D1-00 29 November, 2024...

  • Page 13: Overview Of The 9711A

    Section 3 OVERVIEW OF THE 9711A 3.1 General The Model 9711A is a self-contained 9 range, 4 terminal shunt, for precision current measurements up to 300 A. The design optimizes a number of important factors such as the effects of self-heating, temperature coefficient, size, weight, ease of operation and total measuring range.

  • Page 14: Operating Instructions

    Section 3 3.2 Operating Instructions 3.2.1 Maximum Current Determine the maximum current that will be measured. If maximum current to be measured is unknown, good instrumentation practice would be to approximate it at a value that is certain not to be exceeded.

  • Page 15: Measurements Above 10 A

    Section 3 3.2.4 Measurements above 10 A For measurements above 10 A (up to and including 300 A), observe the same procedures as described in 3 (a) above, except connect one lead to the 100 A or 300 A binding post as required (instead of to the 10 A binding post).

  • Page 16: Basic Uncertainty

    Section 3 3.2.7 Basic Uncertainty The basic uncertainty that can be attained overall is the accuracy of the shunt resistor in use plus the accuracy of the readout instrument. This value is in "% of full scale" and/or "% of reading" depending on how the readout instrument is rated.

  • Page 17: Calibration And Performance Verification

    Table 3 for each resistance values. 4.2 Calibration Overview This calibration procedure covers the entire range of the 9711A Series of Multi-Tap DC Shunts. The 9711A Series has 9 shunt calibration resistance values with each reistance value requireing verification at various currents.
  • Page 18 9711A Users may find the use of Guildline Calibration Services an excellent convenience as well as a great alternative to maintaining their own calibration facilities to support these standards.

  • Page 19: Equipment And Standards Required For Calibration

    SCW-30:18AWG : 18 Gauge Low Thermal Wire (d) Optional (For Automation and Connections) • Guildline 6664B/C 4-Wire, 16 Channel Low Thermal Scanner , MAX current 1 A / 0.1Ω • Guildline Bridgeworks-R or C Resistance Software 6623-100A Range Extender (Limits 300 A Range Calibration to a maximum of 100 A) •...

  • Page 20: Calibration Note

    Section 4 from sources such as guard errors, thermal emfs, temperature and or EMI errors and others. The procedure assumes operators will make adequate allowance for equipment stabilization and measurement settling times. For the best uncertainties with least operational influence on the measurements, it is recommended that customers use automation technologies such as Bridgeworks-R or Bridgeworks-C Software, IEEE control and 6664 Low Thermal Scanners (can be used for automation of measurements up to 2 A).
  • Page 21 Section 4 Range Recommended A Input Foot Notes Comments Resistance Test Currents Minimum of 6623A-300A Range Extender required for 30 A, 300 A Currents above 150 A. 0.333 mΩ 1, 4 (30 to 300) A 100A opt Calibrate in order (minimum current to maximum current) 6623A-300A Range Extender required 1 mΩ...

  • Page 22: Nominal Value Calibration Procedure

    Section 4 4.6 Nominal Value Calibration Procedure 4.6.1 Record the UUT Information on Table 4. (a) Allow the 9711A to stabilize at Calibration environment for a 24 hour period. Ensure that the room is properly ventilated to dissipate heat up to 30 Watts of power for the calibration process. Remove the T-Nuts from input common, 300 A and 100A posts, remove the knurled nuts from potential high, common and 10 A post.
  • Page 23 Section 4 (c) Output the first current (starting with lowest current) for the 0.1 A and after proper bridge measurement cycle (refer to user manuals for bridge, record the UUT value under MEASURED VALUE on the worksheet. (d) Unit value should be between the minimum and maximum values. If not, unit will require repair. (e) Repeat for all currents listed for each test point.
  • Page 24 Section 4 (c) Output the first current (starting with lowest current) for the 10 A and after proper bridge measurement cycle (refer to user manuals for bridge), record the UUT value under MEASURED VALUE on the worksheet. (d) Unit value should be between the minimum and maximum values. If not, unit will require repair. (e) Repeat for all currents listed for each test point.
  • Page 25 Section 4 Unit value should be between the minimum and maximum values. If not, unit will require repair. (g) Repeat for all currents listed for each 300 A test point. Always start with lowest current (minimum heat dissapation) and work to highest current. Note: Measurement Tips.

  • Page 26: Measured Value

    Section 4 Calibration UUT Serial Number Calibration Date Last Calibration Date Temperature 0.000 01 A Range Nominal Value: 10 kΩ 12 Month Tolerance: ±100 ppm ALIBRATION Measured Value Lower Value Limit Upper Value Limit URRENT 0.000 1 9 999.000 Ω 10 001.000 Ω...
  • Page 27 Section 4 Calibration UUT Serial Number Calibration Date Last Calibration Date Temperature 1 A Range Nominal Value: 0.1 Ω 12 Month Tolerance: ±100 ppm ALIBRATION Measured Value Lower Value Limit Upper Value Limit URRENT 0.099 990 0 Ω 0.100 010 0 Ω 0.099 990 0 Ω...

  • Page 28: Calibration Of 100 A (1 Mohm) Range

    Section 4 4.7 Optional Calibration Procedure (Drift Verification) 4.7.1 Calibration of 300 A (0.333 mOhm) Range (a) Record the last calibration date and previous values for each range on Table 4. The last calibration date is used to determine if the unit has met 1 year specifications. (b) Allow the 9711A to stabilize at Calibration environment for a 24 hour period.

  • Page 29: Calibration Of 10 A (10 Mohm) Range

    Section 4 (d) Calculate Actual Deviation and compare to Maximum Deviation. Unit should be within maximum deviation values. If not, unit will require repair. (e) Repeat for all currents listed for each test point. Always start with lowest current (minimum heat dissiapation) and work to highest current.

  • Page 30: Calibration Of 100 Ma And Below (1 Ohm) Ranges

    Section 4 (e) Repeat for all currents listed for each test point. Always start with lowest current (minimum heat dissipation) and work to highest current. 4.7.5 Calibration of 100 mA and below (1 Ohm) Ranges (a) Remove the Range Extender cable and connect leads from the 10A to the Bridge directly. (b) Move the two Range Plugs to 0.1 A.
  • Page 31 Section 4 Calibration UUT Serial Number Calibration Date Last Calibration Date Temperature Nominal Ohmic Value: 0.333 mΩ 300 A Range 12 Month Tolerance ±1000 ppm CTUAL EVIATION AXIMUM ALIBRATION HMIC ALUE HMIC ALUE (Ω) (Ω) URRENT ALIBRATION URRENT ALIBRATION EVIATION 300* * Optional Nominal Ohmic Value: 1 mΩ...
  • Page 32 Section 4 Calibration UUT Serial Number Calibration Date Last Calibration Date Temperature Nominal Ohmic Value: 0.1 Ω 1 A Range ±100 ppm 12 Month Tolerance CTUAL EVIATION AXIMUM ALIBRATION HMIC ALUE HMIC ALUE (Ω) (Ω) URRENT ALIBRATION URRENT ALIBRATION EVIATION Nominal Ohmic Value: 1 Ω...
  • Page 33 Section 4 Calibration UUT Serial Number Calibration Date Last Calibration Date Temperature Nominal Ohmic Value: 100 Ω 0.001 A Range 12 Month Tolerance ±100 ppm CTUAL EVIATION AXIMUM ALIBRATION HMIC ALUE HMIC ALUE (Ω) (Ω) URRENT ALIBRATION URRENT ALIBRATION EVIATION 0.000 1 0.00 1 Nominal Ohmic Value: 1 kΩ...
  • Page 34 Section 4 TM9711A-D1-00 4-18 29 November, 2024...

  • Page 35: Maintenance

    Section 5 MAINTENANCE Maintenance of the resistor consists only of routinely inspecting the unit for physical damage and cleanliness. Cleanliness is especially important on the high value resistors (1 Megaohm and greater). These should be cleaned with isopropanol and a soft brush or cloth. Special care should be taken to ensure that the terminal connectors are clean.

  • Page 36: Short Circuit Troubleshooting

    The following tables list the replaceable parts. Note that once a part has been replaced, the unit may be required to be recalibrated. To Contact Guildline Instruments, the following information is provided. USA and Canada Telephone: (613) 283-3000 USA and Canada Fax: 1-613-283-6082...
  • Page 37 Section 5 Outside US and Canada Telephone: +[1] 613 283-3000 Outside US and Canada Fax: [1] +613 283-6082 You can also contact Guildline Instruments Limted via their Email or Websites. Email is: sales@guildline.com Website is: www.guildlinecom 9711A Spare Parts Listing...
  • Page 38 Section 5 300A 100A Figure 5-1: 9711A Schematic Layout TM9711A-D1-00 29 November, 2024...