OPERATING INSTRUCTIONS for the ACCU-TRANS™ TRANSFORMER-WINDING RESISTANCE METER Series II Part Number VIC-8000-S2 Vanguard Instruments Company 1710 Grevillea Court Ontario, California 91761 TEL: (909) 923-9390 FAX: (909) 923-9391 July 2001 Rev 0
Accu-Trans Operating Procedures SAFETY SUMMARY The following safety precautions must be observed during all phases of test set-up, test hookups, testing, and test-lead disconnects. can produce a high-voltage spike capable of causing severe injury or death. Accordingly, its important for personnel safety that test leads be securely attached to the transformer terminals to prevent their being accidentally disconnected during testing.
Accu-Trans Operating Procedures Table of Contents SAFETY SUMMARY................................................................................................................. I 1.0 INTRODUCTION ...................................................................................................................3 1.1 APPLICABILITY................................................................................................................3 1.2 SUPERSEDURE NOTICE..........................................
Accu-Trans Operating Procedures Table of Figure Figure 1.0 Figure 2.0 Figure 3.0 Figure 4.0 Figure 5.0 Figure 6.0 Accu-Trans Controls and Indicators ............................................................................5 90 to 130Vac Jumper Setting.......................................................................................7 210 to 240Vac Jumper Setting.....................................................................................7 Summary of Step-by-Step Accu-Trans Operation......
Accu-Trans Operating Procedures 1.0 INTRODUCTION 1.1 Applicability This manual applies to a second-generation Accu-Trans™ (Series II, henceforth, called the Accu-Trans), part number VIC-80000S2 manufactured by the Vanguard Instruments Co. A prior manual supports a first generation Accu-Trans (i.e., a Series I configuration). diagnostic testing and down loading test records. The Accu-Trans is field-portable, rugged; it features simple, easy operation by first-time users with little training. 1.
Accu-Trans Operating Procedures 2.0 ACCU-TRANS SPECIFICATIONS Table 1. ACCU-TRANS SPECIFICATIONS TYPE Special-purpose test equipment, portable, micro-ohmmeter SIZE (inches) 16.8 wide by 12.6 high by 10.6 deep WEIGHT Less than 21 pounds RESISTANCE 1 micro-ohm to 200 ohms TEST CURRENT 2 amperes max DISPLAY LCD, back-lighted, 4-line by 20-character PRINTER 2.
Accu-Trans Operating Procedures 3.0 CONTROLS AND INDICATORS (See Figure 1 and refer to Table 1.) Accu-Trans controls and indicators are shown in Figure 1.0. A leader line with an index number points to each control and indicator, which is cross-referenced to a functional description in Table 2. This table describes the function of each item on the Figure 1.0 control-panel.
Accu-Trans Table 1.0 Fig. 1 Index 1 Operating Procedures Functional Descriptions of Accu-Trans Controls and Indicators Panel Markings RS-232C 2 (Not titled; 16-key pad) 3 (Not titled; LCD) 4 120/240 2A, 50-60 Hz Fuse: 250 Vac, 3A Slow Blow 5 GROUND 6 (Not titled; thermal printer) 7 HIGH CURRENT PRESENT 8 (Not titled; test lead jacks) Functional Descriptions Computer interface port; 9-pin connector; female DB type.
Accu-Trans Operating Procedures 4.0 PRETEST SETUP 4.1 Operating Voltages The Accu-Trans operating voltages are selectable between 90-130Vac, 50/60Hz or 200-240, 50/60Hz. Voltage selection is set Table 2.0 VOLTAGE SELECTION 90-130Vac 200-240Vac by the placement of jumpers on the power terminal block as listed in Table 2.0 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.
Accu-Trans Operating Procedures 4.2 Accu-Trans LCD Contrast Control To darken the LCD display, press and hold the “Paper ∧ Contrast” switch for two seconds; to lighten the LCD display, press and hold the “Paper ∨ Contrast” switch for two seconds. Figure 1.0 to become familiar with the total Accu-Trans operation and the logical branching for various test options. (More experienced operators may use this figure as a handy help and reference guide.
Accu-Trans Figure 4.
Accu-Trans Operating Procedures 6.2 Step-by-Step Procedures at StartUp Menu This display doesn’t prompt any action; but simply reminds the user that a test is in progress. The time for this display depends on size of the winding’s inductance and the test mode selected. 6.2.1 START-UP Menu: Observe that the Start-Up menu displays as shown below: 1. TEST XFMR 2.
Accu-Trans Operating Procedures h) When either option is selected, the next window displays with the prompt “KEEP THIS READING? Go to the next step. m) At the “RUN ANOTHER TEST?” Menu, the operator may choose to run another test, by selecting “YES”. Return to step 6.2.2.a to run test. KEEP THIS READING 1.YES 2. NO n) If NO is selected (i.e., don’t run another test) the program returns to the Start-Up. Menu (section 6.2.1).
Accu-Trans Operating Procedures Figure 5.0 Typical Test Report Printout 6.3.1 Transformer ID Entries: The operator can enter test data using the following procedures. as the key continues to be pressed. The characters selected are entered at the position of the cursor. Pressing the up key (∧) advances the cursor by one space; pressing the down key (∨) moves the cursor back one space. If a character is erroneously entered, select the new key to get the correct entry.
Accu-Trans Operating Procedures ENTER key and go to the next step. The STATION screen will then be displayed. go to the next step. The SERIAL NUMBER screen displays. STATION: SERIAL NUMBER: b) Enter characters for naming the station where the transformer to be tested is located. When all the characters are selected or identifying the station, press ENTER key and go to the next step. The CIRCUIT screen displays.
Accu-Trans Operating Procedures press the down (∨) key to roll down, through the saved test records. 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 6.3.3). The next menu displays the number of test. in the record, time and date of the test. There are 2 tests in the test record below.
Accu-Trans Operating Procedures RECORD RESTORED! 1. ENTER XFMR ID 2. REVIEW RECORD 3. RESTORE RECORD 4. NEXT PAGE a) To begin the Restore Recording steps, press key # 3 (RESTORE RECORDING), which shows a menu for three main procedures, as displayed below. Go to next step. The above display confirms to the operator that the selected record has been restored. e) When the restoration is confirmed, press ENTER key to select the viewing option as shown below. 1. RESTORE RECORD 2. DIRECTORY 3.
Accu-Trans Operating Procedures a) Press key # 3 to select the Restore Recording step sequence, and go to the next step. The following menu displays: c) Press key # 1 to print the entire directory of test records; Press key # 2 to print the short directory. A short directory lists the last 20 test records stored in the Accu-Trans memory. This ends the print directory sequence. 1. RESTORE RECORD 2. DIRECTORY 3. ERASE RECORD b) Press key # 2 (DIRECTORY) and go to the next step.
Accu-Trans Operating Procedures Figure 6.0 Typical Record Directory Printout 6.3.5. Erase Recording Procedure The Erase Recording sequence begins with the Set-Up Menu, shown below. Go to the next step. ERASE RECORD 1. ERASE SINGLE REC. 2. ERASE ALL RECORDS 1. ENTER XFMR ID 2. PREVIEW RECORD 3. RESTORE RECORD 4. NEXT PAGE c) To erase a single a record, press key # 1; to erase all records press key # 2. If a single recording is selected go to the next step; The prompt below displays.
Accu-Trans Operating Procedures d) Enter the number of the record that is to be erased and press ENTER key. Go to the next step. The confirmation display appears as shown below: 6.3.6 Enabling Computer Interface The Computer Interface Mode allows the user to retrieve test records stored in the Acccu-Trans memory via the RS-232C port An IBM PC program is provided with each Accu-Trans allowing the user using his PC to retrieve these test records.
Accu-Trans Operating Procedures a) Begin the date and time set by pressing key # 4 (NEXT PAGE) and going to the next step. The menu below appears. Go to the next step. a) This procedure begins in the Set-Up Menu, shown below. Go to the next step: 1. ENTER XFMR ID 2. REVIEW RECORD 3. RESTORE RECORD 4. NEXT PAGE 1. COMPUTER CONTROL 2. SET TIME 3. ENABLE TEST MODE b) Pressing key #4 (NEXT PAGE) and the menu below appears: b) Press key # 2 (SET TIME) and go to the next step.
Accu-Trans Operating Procedures switch generates large reactive voltage spikes that are hazardous and exceed the switch’s voltage ratings, thus causing irreparable damage. By connecting the Accu-Trans continuity test input across the switching input and running the regulator switch through all the contacts in it’s range, any breaks in continuity caused by faulty tap switching are detected.
Accu-Trans Operating Procedures If a switch break is detected, an advisory displays (shown below). Press STOP to end the voltage-regulator test. TRANSIENT DETECTED! .
Accu-Trans Operating Procedures APPENDIX A ACCU-TRANS Troubleshooting Guide Item Symptom 1 Reading is incorrect. Possible Problem 1. Poor connection at the Clips. 2. Broken sensing lead. 2 1. No test current going through DUT. 2. Drive circuit not working. 1. Broken sense leads. 2. Reverse sense leads. 3 No Test Current. (Current % read zero) and resistance reading=0 Have test current but resistance reading = 0. NOTE: DUT=Device Under Test Solution 1.
1710 Grevillea Court, Ontario, CA 91761, USA Phone: 909-923-9390 Fax: 909-923-9391 Website: http//www.vanguard-instruments.
