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Guildline 6623A-450 Operation Manual

High current range extender
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Operation Manual
For The
6623A-450/600
High Current Range Extender
www.guildline.com
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.
OM6623A-450/600-C1-00
01 September 2021

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Summary of Contents for Guildline 6623A-450

  • 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

    QUICK MEASUREMENT GUIDE ................3-1 3.1. MEASUREMENT OPERATION GUIDE ....................3-1 3.1.1. Low Ohms Mode Resistance Measurement for all 6622A Models with the 6623A-450/600 ..... 3-2 3.1.2. Recommended Test Setup Limits for the 6623A-450/600................3-4 3.1.3. Checks and Precautions ..........................3-4 3.1.4.
  • Page 4 PROCEDURE..............................5-2 5.3.1. PRELIMINARY MEASUREMENT OF THE 9230A-30-0.1Ω SHUNT ........... 5-2 5.3.2. VERIFICATION OF THE x20-3A RATIO OF THE 6623A-450/600 RANGE EXTENDER ....5-2 5.3.3. VERIFICATION OF THE x400-30A RATIO OF THE 6623A-450/600 RANGE EXTENDER ....5-3 5.3.4. VERIFICATION OF THE x4000-450/600A RATIO OF THE 6623A-450/600 RANGE EXTENDER .. 5-5 TROUBLESHOOTING AND MAINTENANCE ............
  • Page 5 FIGURE 2-2 : 6623A-450/600 FRONT VIEW ......................2-10 FIGURE 2-3 : 6623A-450/600 REAR VIEW ......................2-11 FIGURE 2-4 : REAR PANEL CONNECTIONS – 6623A-450/600, X20-3A RANGE.......... 2-13 FIGURE 3-1 : RESISTANCE MEASUREMENT RESPONSE VERSUS TEST SAMPLE ......... 3-1 FIGURE 5-1 : MODEL 6623A-450/600 SETUP, X400-30A RANGE ............... 5-4 FIGURE 5-2 : MODEL 6623A-450/600 SETUP, X4000-450/600A RANGE............

  • Page 6: List Of Tables

    LIST OF TABLES TABLE 2-1 : FUSE RATINGS ............................2-2 TABLE 3-1 : 6623A-450/600 RECOMMENDED LOW OHMS MODE TEST SETUPS........3-6 TABLE 6-1 : MODEL 6622A AND 6623A-450/600 ERROR MESSAGES ............. 6-2 TABLE 6-2 : MAINTENANCE SCHEDULE ......................6-3 TABLE 7-1 : GENERAL SPECIFICATIONS ......................7-1 TABLE 7-2 : GENERAL SPECIFICATIONS (CONTINUED) ................

  • Page 7: Introduction

    450 or 600 A, with current ratios of 20:1, 400:1, and 4000:1 respectively. The 6623A-450/600 includes within the same chassis a 3 A current range extender which provides for the first range of a 20:1 ratio with a current extension to 3 A and the cascading to the higher current ranges.

  • Page 8: Overview

    Two current comparator toroidal transformers with associated servo and modulator circuits are utilized in the 6623A-450/600. The lower range of 20:1 ratio with a 3 A current source is part of the first stage current comparator. The higher ranges are cascaded into a separate winding on the first stage to realize the other two ranges of 400:1 and 4,000:1 with the associated current sources.

  • Page 9: Figure 1-1 : Model 6623A-450/600 Block Diagram

    6623A-450/600 First Stage 3 A Range E t d Programmable Servo Amplifier Flux Detector Current Drive Demodulator Magnetic Modulator Slave PSU Current Comparator Toroid Bridge 6622A DCC Bridge Nanovoltmeter Figure 1-1 : Model 6623A-450/600 Block Diagram OM6623A-450/600-C1-00 01 September 2021...

  • Page 10: Installation

    The 6623A-450 may be configured for 120 V operation as shown in Table 2-1. Where the two molded plug on the line cord supplied with the 6623A-450/600 does not match the local power outlet sockets, the plug can be removed and replaced with one that does fit the local service.

  • Page 11: Fuse Selection Or Replacement

    2.1.3. Fuse Selection or Replacement Only fuses with specified current rating type should be used for replacement if necessary. See Table 2-1 below. 6623A-450 FUSES (TIME DELAY TYPE) 120 V 208 V - 240 V 10 A, 250 V, (T)

  • Page 12: Setup And Power On

    6623A-450/600 Extender marked 'BRIDGE'. Connect the input power cord from the 6623A-450/600 to the AC power outlet. Ensure that the power cord is fully seated in the receptacle on the 6623A-450/600 back panel. Turn on the power switch to the 6622A Bridge.
  • Page 13 6622A Bridge before using the Range Extender. The 6622A Operation Manual should be reviewed before proceeding. Note 7: It is recommended to keep the 6623A-450/600 power off when the instrument is not in use for extended periods of time. OM6623A-450/600-C1-00...

  • Page 14: Incoming Inspection

    Note 1: A proper extender profile must have been created in the non-volatile memory of the 6622A for the 6623A-450/600 Range Extender before proceeding. Note 2: Do not power on the 6623A-450/600 with a shunt connected to one of the ranges on the back panel.
  • Page 15 From the Setup menu, configure the measurement setup as follows: Select 'Low Ohms' mode function key. Press the right hand key until the selection '6623A-450/600' is shown and select 'Edit' function key. Enter 1 on highlighted 'Resistance RS:' line on display by using the numeric key pad.
  • Page 16 From the Setup menu, configure the measurement setup as follows: Select 'Low Ohms' mode function key. Press the right hand key until the selection '6623A-450/600' is shown and select 'Edit' function key. Enter 1 on highlighted 'Resistance RS:' line on display by using the numeric key pad.
  • Page 17 From the Setup menu, configure the measurement setup as follows: Select 'Low Ohms' mode function key. Press the right hand key until the selection '6623A-450/600' is shown and select 'Edit' function key. Enter 1 on highlighted 'Resistance RS:' line on display by using the numeric key pad.
  • Page 18 The tests should execute with no measurement errors indicated and should indicate the approximate ohms value of the shunts depending on the actual values of the standards. This is not the 6623A-450/600 full rated accuracy but serves a functional test for the purposes of determining the instrument has been received in proper working order.

  • Page 19: 6623A-450/600 Front Panel

    Section 2 2.3. 6623A-450/600 FRONT PANEL There are no controls on the front panel of the 6623A-450/600, only two indicators for power and fault. Figure 2-2 : 6623A-450/600 Front View 2.3.1. Power The power-on indicator is lighted when the AC power is applied to the unit and the power switch on the rear panel is 'ON'.

  • Page 20: 6623A-450/600 Rear Panel Connectors And Controls

    Section 2 2.4. 6623A-450/600 REAR PANEL CONNECTORS AND CONTROLS Figure 2-3 : 6623A-450/600 Rear View 2.4.1. Line Input Connector The Line Input Connectors are a combination of a 3-prong AC standard male connector, an ON/OFF switch and a fused line input with access for fuse replacement. The line input connector accommodates nominal voltages of 208 to 240 V.

  • Page 21: Bridge Connector

    Section 2 2.4.3. Bridge Connector The 'BRIDGE' connector is a 7 pin circular connector which is used to connect the necessary signals to the Model 6622A Bridge. Cautions: It is essential that only one set of C1 and C2 current terminals be connected at any one time and the shunt current leads are connected to the correct C1 and C2 range terminals for a specific measurement current.

  • Page 22: Figure 2-4 : Rear Panel Connections - 6623A-450/600, X20-3A Range

    Section 2 Figure 2-4 : Rear Panel Connections – 6623A-450/600, x20-3A Range OM6623A-450/600-C1-00 2-13 01 September 2021...

  • Page 23: Quick Measurement Guide

    This section contains information regarding the measurement of resistors in the range of 1 µohm to 10 ohms. This guide is provided for manual control of the 6623A-450/600 from the front panel of the 6622A Bridge. An operation guide for full automatic control of the Range Extender and the 6622A Bridge through the terminal of a system computer is provided in the BridgeWorks, version 2.1b or higher, Software User Manual.

  • Page 24: Low Ohms Mode Resistance Measurement For All 6622A Models With The 6623A-450/600

    The 6622A in its Low Ohms Mode enables measurement of resistors below 100 ohms. When used with a Model 6623A-450/600 High Current Range Extender, measurement of low ohm resistors can be made at a maximum test current up to 450 A or 600 A.
  • Page 25 Select 'Low Ohms' mode function key. Options at this level are 'Edit' (test setup information), 'OK' (to accept) or '6623A-450/600'. Make sure the '6623A-450' or '6623A-600' mode is selected with the specific range to be used. This can be done by pressing the softkey until the displayed value is changed to '6623A-450/600'.

  • Page 26: Recommended Test Setup Limits For The 6623A-450/600

    Ensure that all current lead connections are tight. CAUTION: Loose High Current Connections Can Create Very High Temperatures and Arcing. It is recommended to keep the 6623A-450/600 power off when the instrument is not in use for extended periods of time. OM6623A-450/600-C1-00...

  • Page 27: Example Calculations

    Section 3 3.1.4. Example Calculations For example, if a 0.01 ohm shunt is to be measured at 10 A: The extender range x400-30A is required to satisfy the test current requirement. The standard resistor must be at least: Rs = 400 x 0.01 / 2 = 2 ohms or higher, so choose a standard resistor of 10 ohms.

  • Page 28: Table 3-1 : 6623A-450/600 Recommended Low Ohms Mode Test Setups

    Model 6622A Bridge with the 6623A-450/600 High Current Range Extender. Refer to the 6622A Operation Manual for the complete resistance ratio and test current measurement specifications of the 6623A-450/600 with the 6622A Bridge in Low Ohms mode of operation.

  • Page 29: Bridgeworks Data Acquisition Software

    Section 3 3.2. BRIDGEWORKS DATA ACQUISITION SOFTWARE The BridgeWorks, version 2.1b or higher, Data Acquisition Software is the control software for the 6622A Series Automatic DCC Resistance Bridges and the 6623A series of High Current Range Extenders. Using the 6622A with the BridgeWorks Data Acquisition Software will increase the functionality and the productivity of the bridge.

  • Page 30: Instrument Operation

    4.1. FRONT PANEL OPERATING PROCEDURE The 6622A Bridges and 6623A-450/600 High Current Range Extenders are manually operable from the front panel of the 6622A. The BridgeWorks Software User Manual contains the operating instructions for fully automatic software control of the 6622A Automatic DCC Resistance Bridge and the 6623A-450/600 High Current Range Extender via the computer system.

  • Page 31: Verification And Calibration

    6622A Bridge in normal ohms mode. The following procedure is to be used to verify the calibration of the 6623A-450/600 High Current Range Extender.
  • Page 32 150 samples are to be used to determine the measurement value and associated standard deviation of the sample set. Note: The 6623A-450/600 is not in operation with the 6622A Bridge at this step. See the 6622A Operation Manual for proper operation of the 6622A Automatic DCC Comparator Bridge.
  • Page 33 450/600 Extender x20-3A range as in 5.3.2., but use a test current value of 3 A and Rx value of 0.005 ohms. Move the leads from the 6623A-450/600 Extender x20-3A range terminals to the x400-30A range terminals as shown in Figure 5-1.

  • Page 34: Figure 5-1 : Model 6623A-450/600 Setup, X400-30A Range

    Section 5 Figure 5-1 : Model 6623A-450/600 Setup, x400-30A Range OM6623A-450/600-C1-00 01 September 2021...
  • Page 35 Replace the 9230A-150-0.005Ω Shunt with the 9230A-500-0.0005Ω Shunt. Measure and record the ohms value of the 9230A-500-0.0005Ω Shunt on the 6623A-450/600 Extender x400-30A range as in 5.3.3., but use a test current value of 30 A and Rx value of 0.0005 ohms.

  • Page 36: Figure 5-2 : Model 6623A-450/600 Setup, X4000-450/600A Range

    Section 5 Figure 5-2 : Model 6623A-450/600 Setup, x4000-450/600A Range OM6623A-450/600-C1-00 01 September 2021...

  • Page 37: Troubleshooting And Maintenance

    BridgeWorks Data Acquisition Software. The error messages may relate to faulty operation or setup of the 6623A-450/600 High Current Range Extender. The error messages and their corrective measures are summarized in Table 6-1. See also the BridgeWorks Software User Manual.

  • Page 38: Table 6-1 : Model 6622A And 6623A-450/600 Error Messages

    None, fatal 6622A power on error (try power switch) Table 6-1 : Model 6622A and 6623A-450/600 Error Messages Note: The 'Coefficient' utility described for error 6 is a dedicated program that can read in the stored ratio correction coefficients as well as load them into the 6622A Bridge. It can also store and load these values in a file as well as print them out.

  • Page 39: Table 6-2 : Maintenance Schedule

    6623A-450/600 current source circuitry. There is another set of yellow indicators visible behind the air outlet screen of the front panel. One or more may light when a fault in a particular 150 A current source board is detected.
  • Page 40 The 6622A Bridge will automatically prevent the initiation of a measurement or stop a measurement in progress and shut down the current source of the 6623A-450/600 when an error is detected. Check that the power cord is fully seated into the power entry of the 6623A-450/600 back panel.

  • Page 41: Table 7-1 : General Specifications

    D 29.1 , W 20.7 , H 8.75 Table 7-1 : General Specifications NOTE 1: The 6623A-450/600 Current Range Extender is always configured for 208 to 240 VAC 50/60 Hz operation at the point of shipment. No voltage selection is required in this range.

  • Page 42: Table 7-2 : General Specifications (Continued)

    6622A Bridge. Refer to the 6622A Operation Manual for the combined resistance measurement specification of the 6623A-450/600 with the 6622A Bridge in Low Ohms mode of operation. Resistance measurement accuracy varies with specific 6622A models. OM6623A-450/600-C1-00...

  • Page 43: Cable Connection Diagrams

    Section 7 7.4. CABLE CONNECTION DIAGRAMS Connection of shunts with multiple connection points will provide more consistent measurement values where multiple cable connections are used. The following diagrams illustrate a few connection methods where symmetry around the centre line of the shunt terminals is maintained.

  • Page 44: Figure 7-3 : Two Cable Vertical Connection

    Section 7 Figure 7-3 : Two Cable Vertical Connection Figure 7-4 : Four Cable Connection OM6623A-450/600-C1-00 01 September 2021...

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6623a-600

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