Vanguard Instruments Auto-Ohm 200 S3 User Manual
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Vanguard Instruments Auto-Ohm 200 S3 User Manual

True dc digital micro-ohmmeters
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Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600
Vanguard Instruments Company, Inc.
1520 S. Hellman Ave.
Ontario, California 91761, USA
TEL: (909) 923-9390
FAX: (909) 923-9391
True DC Digital Micro-Ohmmeters
USER'S MANUAL
August 2019
Revision 2.4

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Summary of Contents for Vanguard Instruments Auto-Ohm 200 S3

  • Page 1 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 True DC Digital Micro-Ohmmeters USER’S MANUAL Vanguard Instruments Company, Inc. 1520 S. Hellman Ave. Ontario, California 91761, USA TEL: (909) 923-9390 August 2019 FAX: (909) 923-9391 Revision 2.4...
  • Page 2 120V or 240V, auto-ranging ±10% of selected voltage. Power Cord: The Auto-Ohm 200 S3, DMOM-200 S3, and DMOM-600 are supplied with a 16 AWG, 16A power cord with a NEMA 5-15P plug. Replacement cable shall have the same or better rating and is available through the manufacturer.

  • Page 3: Table Of Contents

    REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL TABLE OF CONTENTS CONVENTIONS USED IN THIS DOCUMENT ............... 4 INTRODUCTION ........................5 Auto-Ohm 200 S3 General Description and Features ............. 5 DMOM-200 S3 General Description and Features ............7 DMOM-600 General Description and Features ...............
  • Page 4 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 LIST OF TABLES Table 1. Auto-Ohm 200 S3 Technical Specifications ..............12 Table 2. DMOM-200 S3 Technical Specifications ................. 13 Table 3. DMOM-600 Technical Specifications ................14 LIST OF FIGURES Figure 1.

  • Page 5: Conventions Used In This Document

    REV 2 CONVENTIONS USED IN THIS DOCUMENT This document uses the following conventions: The general term “Auto-Ohm S3” is used in this manual to refer to the Auto-Ohm 200 S3, • the DMOM-200 S3, and the DMOM-600. A key, switch, or knob on the Auto-Ohm S3 is indicated as •...

  • Page 6: Introduction

    The unit is operated via a convenient 44-key “QWERTY” keypad on the front panel. The Auto-Ohm 200 S3 can store 128 records of 64 readings internally, and up to 999 test records on an external USB Flash drive. Test header information (Company, Substation, circuit breaker ID’s) can also be entered using the 44-key keypad and is stored with each test...
  • Page 7 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 The Auto-Ohm-200 S3 is furnished with a 30-ft test (#1 AWG) cable set. A 15-ft test cable set is also available as an option. Test cables are terminated with heavy duty welding type clamps.

  • Page 8: Dmom-200 S3 General Description And Features

    REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL DMOM-200 S3 General Description and Features The DMOM-200 S3 is Vanguard’s fourth generation, microprocessor-based, true DC micro- ohmmeter. It is designed for testing EHV circuit-breaker contact resistances, bushing contact joints, welding joints, or for any low-resistance measuring application.
  • Page 9 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 The DMOM-200 S3 is furnished with a 30-ft test cable set. A 15-ft test cable set is also available as an option. Test cables are terminated with heavy duty welding type clamps. The test current and voltage sense cables are isolated and fastened to the clamp jaws.

  • Page 10: Dmom-600 General Description And Features

    REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL DMOM-600 General Description and Features The DMOM-600 is specifically designed for testing EHV circuit-breaker contact resistances, bushing contact joints, welding joints, or for any low-resistance measuring application. This high current and very lightweight (33 lbs/ 15 Kg) micro-ohmmeter is designed to meet the IEEE C57.09-1999 (5.15) requirement for testing circuit breaker contact resistance.

  • Page 11: Figure 1. Furnished Current And Sense Combination Cables

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 Figure 1. Furnished Current and Sense Combination Cables (P/N 8000-0076-SLEEVED) (Auto-Ohm 200 S3 and DMOM-200 S3) Figure 2. Furnished Current Cable (P/N 8000-0072) and Sense Cables (P/N 8000-0073) for DMOM-600...

  • Page 12: Figure 3. Optional Cable With C-Clamp

    REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL Figure 3. Optional Cable with C-Clamp Figure 4. Optional Hand Spike...

  • Page 13: Auto-Ohm 200 S3 Technical Specifications

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 Auto-Ohm 200 S3 Technical Specifications Table 1. Auto-Ohm 200 S3 Technical Specifications Portable Micro-Ohmmeter TYPE PHYSICAL SPECIFICATIONS 17" W x 7" H x 13" D (43.2cm x 17.8cm x 33cm); Weight: 16.8 lbs (7.6 Kg) INPUT POWER 100-240 Vac, 14A, 50/60Hz 1 micro-ohm to 10 milliohms at 200 A (0.1 micro-ohm resolution)

  • Page 14: Dmom-200 S3 Technical Specifications

    REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL DMOM-200 S3 Technical Specifications Table 2. DMOM-200 S3 Technical Specifications Portable Micro-Ohmmeter TYPE PHYSICAL SPECIFICATIONS 18” W x 7” H x 15” D (45.7cm x 17.8cm x 38.1cm); Weight: 19.8 lbs (8.9 Kg)

  • Page 15: Dmom-600 Technical Specifications

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 DMOM-600 Technical Specifications Table 3. DMOM-600 Technical Specifications Portable Micro-Ohmmeter TYPE PHYSICAL SPECIFICATIONS 16.8” W x 12.6” H x 12” D (42.7cm x 32cm x 30.5cm); Weight: 33 lbs (15 Kg) INPUT POWER 100-120 Vac, 20A, 50/60 Hz –...

  • Page 16: Auto-Ohm 200 S3 Controls And Indicators

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL Auto-Ohm 200 S3 Controls and Indicators The Auto-Ohm 200 S3’s controls and indicators are shown in Figure 5. The purpose of the controls and indicators may seem obvious, but users should familiarize themselves with them before using the Auto-Ohm 200 S3.

  • Page 17: Dmom-200 S3 Controls And Indicators

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 DMOM-200 S3 Controls and Indicators The DMOM-200 S3’s controls and indicators are shown in Figure 6. The purpose of the controls and indicators may seem obvious, but users should familiarize themselves with them before using the DMOM-200 S3.

  • Page 18: Dmom-600 Controls And Indicators

    REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL 1.10 DMOM-600 Controls and Indicators The DMOM-600’s controls and indicators are shown in Figure 7. The purpose of the controls and indicators may seem obvious, but users should familiarize themselves with them before using the DMOM-600.

  • Page 19: Pre-Test Setup

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 PRE-TEST SETUP Operating Voltages The Auto-ohm 200 S3, DMOM-200 S3, and DMOM-600 operate on voltages between 120-240 Vac, 50/60 Hz. LCD Screen Contrast Control To increase the LCD screen contrast, press and hold the key for two seconds.

  • Page 20: Operating Procedures

    REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL OPERATING PROCEDURES Connection Diagrams Figure 8. Typical Auto-Ohm S3 Connection Diagram Figure 9. Typical Auto-Ohm S3 Connection Diagram with Dual Ground Option...
  • Page 21 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 Setting the Date and Time To set the date and time: a. Start from the “START-UP” menu:      Press the key (SETUP). b. The following screen will be displayed: ...

  • Page 22: Setting The Interface Language

    REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL Setting the Interface Language Follow the steps below to set the interface language (English, Spanish, or Turkish): a. Start from the “START-UP” menu:     ...

  • Page 23: Testing Procedures

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 Testing Procedures 3.4.1. Entering Test Record Header Information You can enter the test record header information before performing tests. The record header includes identifying information such as the company, station, circuit, manufacturer, etc. Once the header information has been set, it will apply to all subsequent test records.
  • Page 24 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL d. The following screen will be displayed:    ↑ ↓     Type the station name using the keypad and then press the key.
  • Page 25 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 g. The following screen will be displayed:    ↑ ↓     Type the circuit breaker’s model information using the keypad and then press the key.

  • Page 26: Performing A Test

    REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL 3.4.2. Performing a Test Follow the steps below to perform a test: a. Start from the “START-UP” menu:      Press the key (RUN TEST).
  • Page 27 (NO) if you do not want to enter the passing resistance range for a test. Continue to step c. If using an Auto-Ohm 200 S3 with the Dual Ground option, the following screen will be displayed before the screen shown in step c: ...
  • Page 28 (CUSTOM) and then enter a value from 1A to 200A for the Auto-Ohm 200 S3/DMOM-200 S3 or 10 A to 600A for the DMOM-600. When using a DMOM-600 with input power of 100-120 Vac, the maximum recommended test current is 300A.
  • Page 29 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 e. The following screen will be displayed:             Select the burn-in time by pressing the corresponding numeric key on the keypad.
  • Page 30 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL g. The test parameters summary screen will be displayed as shown below:        Press the key to start the test. [START] h. The following screen will be displayed temporarily: ...
  • Page 31 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 If the continuous burn-in option was selected in step e, the following screen will be displayed:  NOTE  µΩ    The unit will continue measuring the resistance and current and will display the values on the screen.
  • Page 32 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL j. The following screen will be displayed: Auto-Ohm 200 S3 DMOM-200 S3/DMOM-600               Press the key (YES) to save the reading.
  • Page 33 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 record for the current reading. The following screen will be displayed:        Press any key to continue. The following screen will be displayed: ...
  • Page 34 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL        SAVE INTERNALLY Press the key (SAVE INTERNALLY) to save the test record to the unit’s Flash EEPROM. The following screen will be displayed: ...
  • Page 35 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 The following screen will be displayed:        If a USB flash drive is connected to the unit, the following screen will be displayed instead: ...

  • Page 36: Figure 10. Sample Dmom-200 S3/Dmom-600 Printout

    REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL Figure 10. Sample DMOM-200 S3/DMOM-600 Printout Figure 11. Sample DMOM-200 S3/DMOM-600 Printout (with Dual Ground Option)

  • Page 37: Performing A Quick Test

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 3.4.3. Performing a Quick Test A quick test can be performed without having to enter the test current, the burn-in time, and the ramp time. For a quick test, a current of 100A is used, and the burn-in time and ramp time are both set to 5 seconds.
  • Page 38 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL   µΩ    The current will then be ramped down and then the final test results will be displayed as shown below:   µΩ...
  • Page 39 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 e. The following screen will be displayed:        Press any key to continue. f. The following screen will be displayed:  ...
  • Page 40 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL        1. SAVE INTERNALLY Press the key (SAVE INTERNALLY) to save the test record to the unit’s Flash EEPROM. The following screen will be displayed: ...

  • Page 41: Working With Test Records

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 Working With Test Records 3.5.1. Viewing the Contents of the Working Memory Whenever a test is performed and the reading is kept, the data is temporarily stored in the Auto-Ohm’s working memory.
  • Page 42 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL           µΩ   Press the key to return to the Press the key. The test record [STOP] [∨] “START-UP”...

  • Page 43: Saving Test Results To A Test Record

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 3.5.2. Saving Test Results to a Test Record After performing a test, the user is presented the option to save the test results to the unit’s Flash EEPROM or to a USB Flash Drive. If the test results are not saved immediately after performing a test, they will still remain in the working memory and can be saved later, as long as a new test has not been performed and the unit has not been turned off.
  • Page 44 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL If a USB Flash drive is connected to the unit, continue to step d. If a USB Flash drive is NOT connected to the unit, continue to step e.

  • Page 45: Restoring A Test Record From Flash Eeprom

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 3.5.3. Restoring a Test Record From Flash EEPROM Use the steps below to restore a test record from the Auto-Ohm’s internal Flash EEPROM to the working memory: a. Start from the “START-UP” menu: ...
  • Page 46 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL d. The following screen will be displayed:        If you have a USB Flash drive inserted in the unit’s “USB MEM” port, the...
  • Page 47 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 1.2. The following screen will be displayed:        Press the key (YES) to display the test record. 1.3. The basic information about the restored test record will be displayed as shown: ...
  • Page 48 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL Press the button or the key to display the next or previous test [∧] [∨] record, respectively. The basic test record information will be displayed as shown: ...

  • Page 49: Restoring A Test Record From A Usb Flash Drive

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 3.5.4. Restoring a Test Record From a USB Flash Drive Use the steps below to restore a test record from a USB Flash drive to the Auto-Ohm’s working memory: a.
  • Page 50 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL d. The following screen will be displayed:        Press the key (THUMB DRIVE). e. The following screen will be displayed:  ...
  • Page 51 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 Press the key. The test record details will be displayed as shown below: [∨]      µΩ Press the key to return to the “START-UP” menu. The restored test record will [STOP] remain loaded in the working memory.

  • Page 52: Copying Test Records To A Usb Flash Drive

    REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL 3.5.5. Copying Test Records to a USB Flash Drive Use the steps below to copy one or all test records from the unit’s Flash EEPROM to a connected USB Flash drive: a.
  • Page 53 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 d. The following screen will be displayed:        1. COPY SINGLE RECORD Press the key (COPY SINGLE RECORD) to copy a single test record from the unit’s Flash EEPROM to the connected USB Flash drive.
  • Page 54 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL 2. COPY ALL RECORDS Press the key (COPY ALL RECORDS) to copy all test records from the Auto- Ohm’s Flash EEPROM to the connected USB Flash drive. All test records will be copied from the unit to the connected USB Flash drive.

  • Page 55: Viewing The Test Record Directory

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 3.5.6. Viewing the Test Record Directory Use the steps below to browse through a directory of the test records stored in the Auto-Ohm’s Flash EEPROM memory: a. Start from the “START-UP” menu: ...
  • Page 56 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL d. The following screen will be displayed:        Press the key to scroll through the test record directory. The test record [∧] [∨]...

  • Page 57: Erasing Test Records From The Flash Eeprom

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 3.5.7. Erasing Test Records from the Flash EEPROM Follow the steps below to erase test records from the Flash EEPROM a. Start from the “START-UP” menu:  ...
  • Page 58 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL d. The following screen will be displayed:        If you have a USB Flash drive inserted in the unit’s “USB MEM” port, the...
  • Page 59 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2        You can cancel the process and return to the “START-UP” menu by pressing the key. [STOP] NOTE Type the record number that you would like to erase using the alpha-numeric keypad and then press the key.
  • Page 60 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL 2. SCROLL TO SELECT Press the key (SCROLL TO SELECT) to scroll through the test record directory and locate the test record that you would like to erase. The following screen will be displayed: ...
  • Page 61 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 2. ERASE ALL RECORDS Press the key (ERASE ALL RECORDS) to erase all the test records from the unit’s internal Flash EEPROM. The following warning screen will be displayed: ...

  • Page 62: Erasing Test Records From A Usb Flash Drive

    REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL 3.5.8. Erasing Test Records from a USB Flash Drive Follow the steps below to erase test records from a USB Flash drive: a. Make sure a USB Flash drive is connected to the unit’s “USB MEM” port, and then start from the “START-UP”...
  • Page 63 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 e. The following screen will be displayed:        1. ERASE SINGLE REC. Press the key (ERASE SINGLE REC.) to erase a single test record from the connected USB Flash drive.
  • Page 64 REV 2 Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL Press the key if you do not want to erase all the test records. You will be [STOP] returned to the “START-UP” menu. Press the key to proceed with deleting all the test records from the [ENTER] connected USB Flash drive.

  • Page 65: Getting The Latest Firmware, Software, And Manuals

    Auto-Ohm 200 S3 / DMOM-200 S3 / DMOM-600 USER’S MANUAL REV 2 Getting the Latest Firmware, Software, and Manuals The latest firmware, software, and user’s manuals can be downloaded from the Vanguard Instruments Company’s web site at http://www.vanguard-instruments.com. In order to download these items from our site, you will first need to sign up for a FREE user account on our site.
  • Page 66 1520 S. Hellman Ave • Ontario, CA 91761 • USA Phone: 909-923-9390 • Fax: 909-923-9391 www.vanguard-instruments.com Copyright  2019 by Vanguard Instruments Company, Inc. Auto-Ohm 200/DMOM-200 S3/DMOM-600 User’s Manual • Revision 2.4 • August 5, 2019 • TA...

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