OPERATING PROCEDURES for the MODEL DMOM-200 10-200 Amperes True DC Digital Micro-Ohm Meter Part Number VIC-9000-100 Vanguard Instrument Company 1710 Grevillea Court Ontario, California 91761 TEL: 909/923-9390 FAX: 909/923-9391 AUGUST 2001 REV.
Operating Procedures DMOM-200™ SAFETY SUMMARY The following safety precautions must be observed during all phases of test set-up, test hookups, testing, and test-lead disconnects. Do Not Test Inductive Winding Resistance Because the DMOM-200 produces test currents up to 100 amperes, it is able to build up large magnetic fields in iron-core transformers. The interruption of such test currents can produce a high voltage spike that can cause severe injury, death, and/or equipment damage.
Operating Procedures DMOM-200™ TABLE OF CONTENTS Safety Summary 1.0 INTRODUCTION .................................................................................................................. 1 1.1 Applicability ....................................................................................................................... 1 1.2 Supersedure Notice ............................................................................................................. 1 1.3 General Description .............
Operating Procedures DMOM-200™ LIST OF TABLES Table 1.0 DMOM-200 Specifications and Leading Particulars .................................................. 2 Table 2.0 DMOM-200 Controls and Indicators .......................................................................... 4 Table 3.0 Voltage Selection ............................................................................................................ 5 Table 4.0 Run Test Procedure (Measure an Unknown Resistance)................................
Operating Procedures DMOM-200™ 1.0 INTRODUCTION 1.1 Applicability This manual applies to the Model DMOM200™, part number VIC-9000-100, which is made by Vanguard Instruments Company. 1.4 Functional Description DMOM-200 operation is based on the electrical relationships described by Ohm’s law: R=V/I, where I is a known test current and V is the voltage across the unknown resistance (e.g., breaker contacts).
Operating Procedures DMOM-200™ 2.0 DMOM-200 SPECIFICATIONS Table 1.0 DMOM-200 Specifications and Leading Particulars MODEL .............................................DMOM-200 (part number VIC-9000-100) TYPE..……… ..................................Special-purpose test equipment, portable; 100-ampere, Digital Micro-Ohm Meter POWER ............................................85 to 132 V ac or 200-240 V ac (selectable), 50/60 Hz SIZE (inches) ....................................16.8 wide by 12.
Operating Procedures DMOM-200™ control panel. Although the purpose of these controls and the display may seem obvious, users should become familiar with them before attempting to use the DMOM200. However, accidental misuse of the controls will usually cause no serious loss of data or equipment damage. First-time users should review and become familiar with the Safety Summary located in the front section of this manual. 3.0 CONTROLS AND INDICATORS (See Figure 1.0 and refer to Table 2.0).
Operating Procedures Table 2.0 Fig. 1 Index 1 DMOM-200™ DMOM-200 Controls and Indicators PANEL MARKING ON/OFF FUNCTIONAL DESCRIPTION Input power connector with third-wire safety ground and 10A built-in circuit breaker. Connector, 9-pin; Serial interface-port connector 2 RS-232C (female DB type) to allow the DMOM-200 to be controlled by an IBM-compatible PC.
Operating Procedures DMOM-200™ PRETEST SETUP 4.1 Operating Voltages The DMOM-200 operating voltages are selectable between 90-130Vac, 50/60Hz or 210-240, 50/60Hz. Voltage selection is set Table 3.0 VOLTAGE SELECTION 90-130Vac 210-240Vac by the placement of jumpers on the power terminal block as listed in Table 3.0 below and Figures 2.0 and 3.0. Voltage Selection TERMINAL BLOCK JUMPERS Brown to blue & yellow to green Blue to yellow 120Vac Jumper Installation Figure 2.
Operating Procedures DMOM-200™ 4.2 DMOM-200 Printer Paper The DMOM-200 printer uses 2.5-inch wide thermal paper for printing test results. We recommend that to maintain the highest quality printing and to avoid paper jamming, use paper supplied by our factory. Paper can be ordered from two sources, as follows: 4.3 DMOM-200 Cable Connections The DMOM-200 is supplied with a 35foot test cable set. Each cable consists of a current-carrying cable and a voltage-sensing cable.
Operating Procedures DMOM-200™ Operations). Item 2 (REVIEW RECORD) is used to review store records. Item 3 (RESTORE RECORD) is used to erase or restore test records or to print a directory of test records in stored memory. Item 4 (NEXT PAGE) is used to put the DMOM200 under PC control or to set the time and date clock. 4.0 OPERATING PROCEDURES (Refer to Tables 4.0 through 12.0) 5.1 Operating Overview (See Figure 5.0, for step-by-step flow.
Operating Procedures DMOM-200™ . Figure 5.
Operating Procedures DMOM-200™ 9
Operating Procedures DMOM-200™ 5.4 Run Test Procedure The following procedure describes the steps to measure an unknown resistance. NOTE The red HIGH CURRENT PRESENT indicator will begin flashing when the test current are applied to resistance load. Table 4.0 STEP 4-1 4-2 4-2a 4-3 4-4 4-5 Run Test Procedure (Measure an Unknown Resistance) ACTION DMOM-200 DISPLAY Begin RUN TEST procedure: Press key no. SELECT TEST CURRENT: 1 on START MENU. “SELECT TEST 1. 10A 2. 25A CURRENT” menu appears. 3.
Operating Procedures STEP 4-6 DMOM-200™ Table 4.0 Run Test Procedure (Measure an Unknown Resistance) (Continued) ACTION DMOM-200 DISPLAY Automatic; no operator action required. FINAL RESISTANCE At the end of burn-in time final resistance I= 100 AMPS displays. Press the “ENTER” key to go to 500.5 MICRO-OHMS next display. 4-7 Automatic: Print test result option display. 4-8 Printing option: When the “PRINT TEST RESULTS?” displays, press #1 key to print. Typical print out is shown in Figure 6.0.
Operating Procedures STEP 4-14 4-15 4-16 DMOM-200™ Table 4.0 Run Test Procedure (Measure an Unknown Resistance) (Continued) ACTION DMOM-200 DISPLAY “SAVE THIS RECORD?” displays when SAVE THIS TEST RECORD? another test was not selected in step 4-12. 1. YES Test record contains all the reading taken 2. NO in this test. To save this record, press key #1 (YES). If test record is not to be saved, press key #2 (NO) and go to step 4-17. NOTE A test record is saved in Flash EEPROM.
Operating Procedures Figure 6.
Operating Procedures DMOM-200™ 5.5 Enter ID Procedure This procedure allows the user to enter the equipment identification to the test record. Table 5.0 Run Setup Procedure (test-record, site, and equipment identification) STEP ACTION DMOM-200 DISPLAY Press key # 2 (SETUP MENU) on START 5-1 1. ENTER ID MENU to go to Setup menu (shown at 2. REVIEW RECORD right). 3. RESTORE RECORD 4.
Operating Procedures DMOM-200™ Table 5.0 Run Setup Procedure (test-record, site, and equipment identification) (continued) STEP ACTION DMOM-200 DISPLAY Enter test item’s MODEL using 5-7 alpha/numeric keypad. When item’s SERIAL NUMBER: MODEL is keyed in, press ENTER to load keyed data and go to SERIAL NUMBER identification display. 5-8 5-9 5-10 Enter test item’s SERIAL NUMBER using alpha/numeric key pad. When serial number is keyed in, press ENTER to load keyed-in data and go to KVA RATING display.
Operating Procedures DMOM-200™ 5.6 Review Record Procedure This procedure describes steps to review a test record residing in DMOM-200 working memory. The user can view the record on the LCD display or from a thermal printout. STEP 6-1 6-2 6-3 6-4 6-5 NOTE To review a test record stored in Flash EEPROM, the user must first restore test record from Flash EEPROM to working memory (see paragraph 5.7) Table 6.0 Review Record Procedure ACTION DMOM-200 DISPLAY On START MENU, press key #2 (SETUP) to 1.
Operating Procedures STEP 6-6 6-7 6-8 DMOM-200™ Table 6.0 Review Record Procedure (continued) ACTION DMOM-200 DISPLAY When the record number, with the time and TEST NUMBER: 1 date of the test, displays and is noted, press TEST CURRENT: 100A the ENTER key: Display lists full data of the BURN - IN TIME: 5 Sec test, including test number, test current, 500.3 MICRO-OHMS burn-in time, and the measured resistance value. NOTE The test record in this example contains 2 tests.
Operating Procedures DMOM-200™ 5.7 Restore Record Procedure This procedure describes the steps to recall a test record stored in the DMOM-200 Flash memory. Table 7.0 Restore Record Procedures STEP ACTION DMOM-200 DISPLAY On START MENU, press #2 key (SETUP) 7-1 1. ENTER ID to display the SETUP MENU. 2. REVIEW RECORD 3. RESTORE RECORD 4. NEXT PAGE 7-2 On SETUP MENU, press #3 key (RESTORE RECORD) to display menu of options (Restore Record, Directory, Erase Record).
Operating Procedures STEP 7-8 7-9 DMOM-200™ Table 7.0 Restore Record Procedures (Continued) ACTION DMOM-200 DISPLAY Press ENTER key again to restore selected RECORD RESTORED! test record. A Record Restored confirmation displays, after which the display returns to REVIEW RECORD (resumes by returning to step 7-9). Test ENTER key again to display REVIEW RECORD REVIEW RECORD option. 1. SCROLL TEST ECORD 2. PRINT TEST RECORD 7-10 Press key #1 to display data on LCD (see step 6-5).
Operating Procedures DMOM-200™ 5.8 Print Test Record Directory Procedure This procedure describes the steps to print the test record directory that is stored in the DMOM-200 Flash EEPROM. STEP 8-1 8-2 Table 8.0 Print Test Record Directory ACTION DMOM-200 DISPLAY On the RESTORE RECORD display (step 7PRINT DIRECTORY 2), press key #2 (DIRECTORY) to go to a print menu of print options. 1. FULL DIRECTORY 2. SHORT DIRECTORY PRINT DIRECTORY choice is to print either a FULL DIRECTORY or a SHORT DIRECTORY.
Operating Procedures DMOM-200™ 5.9 Test Record Procedure This procedure describes the steps to delete a test record or all test records stored in the DMOM-200 Flash EEPROM. STEP 9-1 Table 9.0 Erase Test Record Procedure ACTION DMOM-200 DISPLAY On the RESTORE RECORD display (step 7ERASE RECORD 2), press key #3 (ERASE RECORD) to 1.ERASE SINGLE RECORD display an ERASE RECORD menu of 2. ERASE ALL RECORDS options (shown at right).
Operating Procedures DMOM-200™ 5.10 Computer Interface Procedure This procedure describes the steps to put the DMOM-200 in computer interface. STEP 10-1 10-2 Table 10.0 Computer Interface Procedures ACTION DMOM-200 DISPLAY Press key #4 (NEXT PAGE) on the SETUP MENU to display the 1. COMPUTER CONTROL COMPUTER CONTROL interface (ITF) 2. SET TIME and SET TIME options menu. Press key #1 (COMPUTER CONTROL) to place the DMOM-200 under an external PC’s control.
Operating Procedures DMOM-200™ 5.12 Calibration Check This procedure describes the steps to perform the calibration check on the DMOM-200. Table 12.0 Calibration Check Procedure STEP ACTION DMOM-200 DISPLAY The calibration check is a functional 12-1 verification self-test of the DMOM-200.
Operating Procedures STEP 12-8 12-9 DMOM-200™ Table 12.0 Calibration Check Procedure (Continued) ACTION OBSERVE RESULT Automatic; no operator action required. CAL CHECK COMPLETE PRESS ANY KEY Press any key to end CAL CHECK. Figure 8.0 Display returns to START MENU.
Operating Procedures DMOM-200™ APPENDIX A DMOM-200 Troubleshooting Guide Symptom Ite m 1 2 3 Possible Problem Reading is incorrect. 1. Poor connection at the Clips. 2. Broken sensing lead. No Test Current. (Current % read zero) and resistance reading=0 Have test current but resistance reading = 0. 1. No test current going through DUT. 2. Drive circuit not working. 1. Broken sense leads. 2. Reverse sense leads. NOTE: DUT=Device Under Test 24 Solution 1.
Operating Procedures DMOM-200™ APPENDIX B DMOM-200 Cable Accessories Plastic Quick-Disconnect Clip, C-Clamp, Current Connector, and Sensing-Wire Connector C-Clamp Plastic Clip Sensing wire Connector Current Connector 25
1710 Grevillea Court, Ontario, CA 91761, USA Phone: 909-923-9390 Fax: 909-923-9391 Website: http//www.vanguard-instruments.
