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Guildline 6623A-3 Operation Manual

High current range extender
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Operation Manual
For The
6623A-3
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-3-C1-00
01 September 2021

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Summary of Contents for Guildline 6623A-3

  • 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 Ohm Mode Resistance Measurement for all 6622A Models with 6623A-3 ........3-2 3.1.2. Recommended Test Setup Limits for 6623A-3 ..................... 3-4 3.1.3. Checks and Precautions ..........................3-4 3.1.4.
  • Page 4 VERIFICATION AND CALIBRATION ..............5-1 5.1. RATIO ACCURACY VERIFICATION ......................5-1 5.1.1. Purpose ................................5-1 5.2. TEST EQUIPMENT REQUIRED ........................5-1 5.3. PROCEDURE ..............................5-2 5.3.1. PRELIMINARY MEASUREMENT OF THE 9230A/30A/0.1 SHUNT ............ 5-2 5.3.2. VERIFICATION OF THE x20 RATIO OF THE 6623A RANGE EXTENDER ........5-2 TROUBLESHOOTING AND MAINTENANCE ............

  • Page 5: List Of Figures

    FIGURE 2-2 : 6623A-3 FRONT VIEW......................... 2-7 FIGURE 2-3 : 6623A-3 REAR VIEW ........................... 2-8 FIGURE 2-4 : REAR PANEL CONNECTIONS – LOW OHM MODE WITH 6623A-3 ........2-9 FIGURE 3-1 : RESISTANCE MEASUREMENT RESPONSE VERSUS TEST SAMPLE ......... 3-1...

  • Page 6: List Of Tables

    LIST OF TABLES TABLE 2-1 : FUSE RATINGS ............................2-2 TABLE 3-1 : 6623A-3 RECOMMENDED LOW OHM MODE TEST SETUP ............. 3-6 TABLE 6-1 : MODEL 6622A AND 6623A-3 ERROR MESSAGES ................. 6-2 TABLE 6-2 : MAINTENANCE SCHEDULE ......................6-3 TABLE 7-1 : GENERAL SPECIFICATIONS ......................

  • Page 7: Introduction

    6623A-3 or the higher current cascaded models above 600 Amperes. The 6623A-3 and the cascaded units are fully programmable via the 6622A series of bridges with the system or via software if automation is desired. The programming is accomplished via the Bridge’s Low Ohms menu.

  • Page 8: Overview

    1.3. OVERVIEW The Model 6623A-3 Current Range Extender is a precision, fixed ratio, direct current transformer based on the principle of the direct current comparator. Figure 1-1 illustrates the instrument circuits in block diagram form with the connections to the 6622A Bridge.

  • Page 9: Figure 1-1 : Model 6623A-3 With 6622A Block Diagram

    Current 1000T Comparator Toroid 6623A-3 Range Extender Programmable Servo Amplifier Flux Detector Current Drive Magnetic Demodulator Slave PSU Modulator Current Comparator Toroid Bridge 6622A DCC Bridge Nanovoltmeter Figure 1-1 : Model 6623A-3 with 6622A Block Diagram OM6623A-3-C1-00OM6623A-3-C1-00 01 September 2021...

  • Page 10: Installation

    2.1.2. Power Voltage Selection The 6623A-3 Current Range Extenders are shipped with the line input voltage set to 240 V. The line input selector must be set to the correct line voltage and the correct fuse must be installed before power is applied to the instrument.

  • Page 11: Fuse Replacement

    Section 2 2.1.3. Fuse Replacement Only fuses with specified current rating type should be used for replacement if necessary. See Table 2-1. FUSES (TIME DELAY TYPE) 100 V 120 V 220 V 240 V 1A, 250V, (T) 1A, 250V, (T) 1/2A, 250V, (T) 1/2A, 250V, (T) Table 2-1 : Fuse Ratings...

  • Page 12: Setup And Power On

    Connect the input power cord from the 6623A-3 to the AC power outlet. Turn on the power switch to the 6622A Bridge. Note: Do not power on the 6623A-3 with a shunt connected to one of the ranges on the back panel.

  • Page 13: Incoming Inspection

    Initially the measurement of the 0.1 ohm shunt with the 6622A Bridge is used as a ratio reference with a test current of 150 mA. Then, it is measured a second time with the 6623A-3 High Current Range Extender at the same current level. The difference between the two measurements must be within specified limits to qualify the functionality of the x20-3A range of the extender.
  • Page 14 Step 5) Disconnect the leads connected to the Rx C1 and C2 terminals of the 6622A and connect them to the C1 and C2 terminals on the back panel of the 6623A-3. See Figure 2-4 showing rear panel connections. Step 6) On the front panel of the 6622A press the previous key to return to the main menu and perform the following set up;...
  • Page 15 0.1000 ohm depending on the actual values of the standards. This is not the 6623A-3 full rated accuracy but serves a functional test for the purposes of determining the instrument has been received in proper working order.

  • Page 16: 6623A-3 Front Panel

    Section 2 2.3. 6623A-3 FRONT PANEL There are no controls on the front panel of the 6623A-3. Figure 2-2 : 6623A-3 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 17: 6623A-3 Rear Panel Connectors And Controls

    Test Resistor are always to be connected directly to the Rx P1 and P2 terminals of the 6622A Bridge or through a channel of a 6664C scanner. Do not power on the 6623A-3 with a shunt connected to the terminals on the back panel.

  • Page 18: Figure 2-4 : Rear Panel Connections - Low Ohm Mode With 6623A-3

    Section 2 Figure 2-4 : Rear Panel Connections – Low Ohm Mode with 6623A-3 OM6623A-3-C1-00OM6623A-3-C1-00 01 September 2021...

  • Page 19: Quick Measurement Guide

    NOTE: 1. The last 35 samples of a total of 150 measurement samples should be used to determine the mean measurement value and standard deviation of the sample set, to allow for sufficient stabilization time to achieve the specified uncertainty for the model 6622A Bridge with the 6623A-3 Range Extender. OM6623A-3-C1-00OM6623A-3-C1-00 01 September 2021...

  • Page 20: Low Ohm Mode Resistance Measurement For All 6622A Models With 6623A-3

    3A. Cautions: Do not cycle the power on the 6623A-3 with a shunt or load connected to the back panel. Connect the load AFTER the 6623A-3 is turned on. Disconnect the load BEFORE turning off the 6623A-3.
  • Page 21 Set the extender ratio range to be used, 20. Select the down arrow key to highlight the next line. For the model 6623A-3 range extender, enter the test current (for the resistor to be measured) in Amps up to 3A.

  • Page 22: Recommended Test Setup Limits For 6623A-3

    Section 3 3.1.2. Recommended Test Setup Limits for 6623A-3 See Table 3-1 for the recommended test setups. The current in the standard resistor is limited to a maximum of 150mA. Note that the current in the standard resistor is controlled...

  • Page 23: Example Calculations

    Section 3 3.1.4. Example Calculations For example, if a 0.1 ohm shunt is to be measured at 3 A; The extender range x20-3A can satisfy the test current requirement. The standard resistor must be at least; Rs = 20 x 0.1 / 2 = 1 ohm or higher, so choose a standard resistor initially of at least 1 ohm.

  • Page 24: Table 3-1 : 6623A-3 Recommended Low Ohm Mode Test Setup

    6622A Bridge with the 6623A-3 High Current Range Extender. NOTE: 2. Refer to the 6622A Operation Manual for the complete resistance ratio and test current measurement specifications of the 6623A-3 with the 6622A Bridge in Low Ohms mode of operation.

  • Page 25: 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 Current Range Extenders. Using the 6622A with the BridgeWorks Data Acquisition Software will increase the functionality and the productivity of the bridge.

  • Page 26: Instrument Operation

    6622A Automatic DCC Resistance Bridge and the 6623A-3 Range Extender via the computer with one or more model 6664C Scanners. The Model 6622A Operation Manual contains the full detailed operating instructions for manual operation of the bridge including the range extender operation.

  • Page 27: Verification And Calibration

    PC with BridgeWorks Software, optional Note: The 6623A-3 is calibrated at the factory using a temperature controlled oil bath controlled to within ± 0.02 °C. If the ambient conditions in the laboratory are sufficiently controlled to less ± 0.5ºC the verification procedure below may be used without an oil or air bath with precautions that the environment around the standards is kept as stable as possible and the additional uncertainties due to temperature variations is taken into account.
  • Page 28 150 samples is to be used to determine the measurement value and associated standard deviation of the sample set. Note: The 6623A-3 is not in operation with the 6622A Bridge at this time. See the 6622A Operation Manual for proper operation of the 6622A Automatic DCC Comparator Bridge.

  • Page 29: Troubleshooting And Maintenance

    BridgeWorks Data Acquisition Software. The error messages may relate to faulty operation or setup of the 6623A-3 High Current Range Extender. The error messages and their corrective measures are summarized in Table 6-1. See also the BridgeWorks Software User Manual for additional information on error messages when using the software.

  • Page 30: Table 6-1 : Model 6622A And 6623A-3 Error Messages

    None, fatal 6622A power on error (try power switch) Table 6-1 : Model 6622A and 6623A-3 Error Messages Note: The ' Coefficient ' utility described for error 6 is a dedicated program that can read in the stored calibration data as well as load them into the 6622A DCC Bridge. It can also store and load these values in a file as well as print them out.

  • Page 31: Table 6-2 : Maintenance Schedule

    Section 6 6.1.3. Fault Indication The power-on indicator on the front panel of the 6623A-3 is normally lighted when the AC power is applied to the unit. If the indicator should significantly dim during a measurement, this is an indication that there is a possible faulty connection. The measurement should be stopped as soon as possible and the cause of the fault should be investigated.
  • Page 32 Rs terminals. 6.1.7. Safety Features 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-3 when an error is detected. OM6623A-3-C1-00OM6623A-3-C1-00...

  • Page 33: Table 7-1 : General Specifications

    D 20.3 , W 20.7 , H 5.2 Table 7-1 : General Specifications NOTE: 1. The 6623A-3 Current Range Extender is always configured for 240 VAC 50/60 Hz operation at the point of shipment. 2. The voltage setting at the power entry on the back of the instrument must be set for the correct line voltage and the correct fuse must be installed by the customer.

  • Page 34: Table 7-2 : General Specifications (Continued)

    6622A Series of DCC Bridges. Refer to the 6622A Operation Manual for the combined resistance measurement specification of the 6623A-3 with the 6622A Series of DCC Bridges in Low Ohms mode of operation. Resistance measurement accuracy varies with the various 6622A models.

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