TRM-203 and TRM-403 TRANSFORMER RESISTANCE METERS USER’S MANUAL Vanguard Instruments Company, Inc. 1520 S. Hellman Ave. Ontario, California 91761, USA TEL: (909) 923-9390 FAX: (909) 923-9391 November 2013 Revision 1.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 SAFETY SUMMARY NOTICE This manual applies to both the TRM-203 and TRM-403 transformer resistance meters. The operating procedures are virtually the same for both models, and any differences are clearly described where applicable. FOLLOW EXACT OPERATING PROCEDURES Any deviation from the procedures described in this User’s Manual may create one or more safety hazards, may damage the TRM-203/403, damage the test transformer, or cause errors in the test results.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL TABLE OF CONTENTS CONVENTIONS USED IN THIS DOCUMENT ..................................................................................... 1 1.0 INTRODUCTION .................................................................................................................... 2 1.1 General Description and Features ................................................................................... 2 1.2 Technical Specifications ..........................................
TRM-203 AND TRM-403 USER’S MANUAL REV 1 LIST OF FIGURES Figure 1. TRM-203/403 Controls and Indicators ............................................................................ 5 Figure 2. Typical Connections to a Load Tap Changer (LTC) ......................................................... 17 Figure 3. Typical TRM Connections Diagram ................................................................................ 17 Figure 4. Typical Three-Phase (Delta) Resistance Test Results Printout .............
REV 1 TRM-203 AND TRM-403 USER’S MANUAL CONVENTIONS USED IN THIS DOCUMENT This document uses the following conventions: • Both the TRM-203 and TRM-403 are simply referred to as “TRM” in this manual. The exact model number is used only in cases where differences between the units are discussed. • A key, switch, or knob on the TRM is indicated as [KEY], [SWITCH], [KNOB]. • Menu names are referenced as “MENU NAME” • TRM LCD screen output is shown as: 1. 2. 3. 4. 5.
TRM-203 AND TRM-403 USER’S MANUAL 1.0 INTRODUCTION 1.1 General Description and Features REV 1 The TRM-203 and TRM-403 are three phase transformer winding resistance meters that allow the user to connect all test cables to the transformer bushings. The unit will then measure the transformer resistance value for each of the phases without the need to disconnect and reconnect cables for each phase.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL Computer Interface The TRM-203/403 can be connected to a PC via the unit’s RS-232C, USB, or Bluetooth interface. A PC can be used to control the TRM-203/403 to perform transformer resistance tests. Test records (stored in the TRM-203/403 or a USB Flash drive) can also be retrieved, reviewed, and printed. Test records are automatically exported to PDF, Excel, and XML formats.
TRM-203 AND TRM-403 USER’S MANUAL 1.2 REV 1 Technical Specifications Table 1. TRM-203/403 Technical Specifications TYPE Portable transformer winding resistance meter PHYSICAL SPECIFICATIONS 21” W x 17” H x 9” D (53 cm x 43 cm x 24 cm); Weight: 35 lbs (15.8Kg) OPERATING VOLTAGE 100-240 Vac, 50/60 Hz RESISTANCE READING 1 micro-ohm – 2000 Ohms (TRM-203); RANGE 1 micro-ohm – 500 Ohms (TRM-403) ACCURACY TEST CURRENT 1 – 19,999 micro-ohms: ±0.
REV 1 1.3 TRM-203 AND TRM-403 USER’S MANUAL TRM Controls and Indicators The TRM-203/403’s controls and indicators are shown in Figure 1. The purpose of the controls and indicators may seem obvious, but users should become familiar with them before using the TRM. Accidental misuse of the controls will usually cause no serious harm. Users should also be familiar with the safety summary found on the front page of this User’s Manual. Figure 1.
TRM-203 AND TRM-403 USER’S MANUAL 2.0 PRE-TEST SETUP 2.1 Operating Voltages REV 1 The TRM’s operating voltages are 100-240 Vac, 50/60 Hz. 2.2 LCD Screen Contrast Control To increase the LCD screen contrast, press and hold the [∧] key for at least two seconds. Release the [∧] key when the desired contrast level has been reached. To decrease the LCD screen contrast, press and hold the [∨] key for at least two seconds. Release the [∨] key when the desired contrast level has been reached. 2.
REV 1 2.5 TRM-203 AND TRM-403 USER’S MANUAL Replacing the Thermal Printer Paper The roll of thermal paper is housed inside a dispenser underneath the printer cover. To replace the paper, follow the steps below: • • • • • • • Unscrew the two large printer cover screws and remove the printer cover. Remove the leftover thermal paper roll from the paper holder. Unroll the new thermal paper roll. Feed the thermal paper into the slot between the paper pocket and the rubber roller.
TRM-203 AND TRM-403 USER’S MANUAL 3.0 OPERATING PROCEDURES 3.1 Configuring the LTCA Software for use with the TRM REV 1 The TRM can be used with a PC using the Vanguard LTCA software. Follow the steps below to properly connect the TRM and configure the LTCA application to recognize the unit. a. Install the LTCA software (please see the LTCA software user’s manual for details). b. Connect the TRM to the PC by connecting a USB cable from an open USB port on the PC to the unit’s “USB PC” port. c.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL f. Launch the LTCA application and then click on the “Settings” icon. The following window will be displayed: Make sure the “User USB Port” is UN-checked. Then, from the “COM Port” drop-down menu, select the COM port that corresponds to the port that the TRM is connected to. Then click the OK button. The LTCA software will now recognize the TRM.
TRM-203 AND TRM-403 USER’S MANUAL 3.2 REV 1 Connecting the TRM to a PC via Bluetooth The TRM can also be connected wirelessly to a PC using Bluetooth. To connect the unit via Bluetooth, it must first be paired with the PC. Follow the steps below to pair the TRM to a PC via Bluetooth: For Windows XP: a. Make sure the TRM is turned on. Then double click on the Bluetooth system tray icon (on the bottom right corner of your computer screen): b.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL The TRM will be listed as “TRM S/N” where S/N is the device’s serial number. Click on the icon for the TRM and then click on the “Next” button. d. The following window will be displayed asking for a secret key to connect to the TRM: Type the word “default” (without the quotes and in all lower-case) and then click on the “Next” button. e.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 f. The following confirmation screen will be displayed: Click on the “Finish” button. g. The TRM-20 will now be displayed in the “My Bluetooth Places” window: Note the port number listed under the device name. In the above case, the port number is COM14. Use this port number in the LTCA software to connect to the TRM.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL For Windows 7: a. Make sure the TRM is turned on. Then double click on the Bluetooth system tray icon (on the bottom right corner of your computer screen): b. The “Bluetooth Devices” window will be displayed: Click on “Add a device”.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 c. All nearby Bluetooth devices will be listed: The TRM will be listed as “TRM S/N” where S/N is the device’s serial number. Click on the icon for the TRM and then click on the “Next” button. d. The device pairing screen will be displayed: Click on “Enter the device’s pairing code” option.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL e. The following window will be displayed: Type the word “default” (without the quotes and in all lower-case) in the text box and click on the “Next” button. f. The following screen will be displayed: Click on the “Close” button.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 g. The TRM will now be listed under “Bluetooth Devices”: Right click on the TRM-20 icon and select “Properties” from the pop-up menu. h. The properties window will be displayed. Click on the “Hardware” tab: Note the port number listed after the device name (COM23 in the above example). Use this port number in the LTCA software to connect to the TRM.
REV 1 3.3 TRM-203 AND TRM-403 USER’S MANUAL Typical Connections to a Load Tap Changer (LTC) Figure 2. Typical Connections to a Load Tap Changer (LTC) 3.4 Typical TRM-203/403 Cable Connections • Do not touch or disconnect any test lead that is connected to a transformer terminal while high current is being conducted during a test. Failure to heed this warning can result in electric shock to personnel and/or damage to the equipment.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 The main steps for using the TRM are outlined below: a. Ground the TRM to the substation ground. WARNING Always connect the TRM to the substation ground before connecting any test lead to any transformer bushing. Failure to follow this procedure may damage the TRM. b. Plug the TRM power cable into a power outlet. c. Attach the test cable clamps to the transformer terminals. d. Turn on the TRM. e.
REV 1 3.6 TRM-203 AND TRM-403 USER’S MANUAL 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, model number, etc. Once the header information has been entered, it will apply to all subsequent test records. To enter the header information: a. Start from the “START-UP” menu: 07/25/12 1. RUN TEST 11:45:35 2. SETUP 22°C 72°F 3.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 d. The following screen will be displayed: STATION: _ ↑/↓ TO POSITION "ENTER" TO ACCEPT Type the station name using the keypad and then press the [ENTER] key. e. The following screen will be displayed: CIRCUIT: _ ↑/↓ TO POSITION "ENTER" TO ACCEPT Type the circuit information using the keypad and then press the [ENTER] key. f.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL g. The following screen will be displayed: MODEL: _ ↑/↓ TO POSITION "ENTER" TO ACCEPT Type the model information using the keypad and then press the [ENTER] key. h. The following screen will be displayed: SERIAL NUMBER: _ ↑/↓ TO POSITION "ENTER" TO ACCEPT Type the serial number using the keypad and then press the [ENTER] key. i.
TRM-203 AND TRM-403 USER’S MANUAL j. REV 1 The following screen will be displayed: OPERATOR: _ ↑/↓ TO POSITION "ENTER" TO ACCEPT Type the operator’s name using the alpha-numeric keypad and then press the [ENTER] key. All header information will be saved, and you will be returned to the “START-UP” menu.
REV 1 3.7 TRM-203 AND TRM-403 USER’S MANUAL Setting the Date and Time To set the date and time: a. Start from the “START-UP” menu: 07/25/12 1. RUN TEST 12:15:11 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [2] key (SETUP) b. The following screen will be displayed: 1. RECORD ID 2. PRINT RECORD 3. SAVE/RESTORE RECORD 4. SET TIME 5. SET LANGUAGE Press the [4] key (SET TIME). c. The following screen will be displayed: ENTER DATE MM-DD-YY _ Type the current date using the keypad.
TRM-203 AND TRM-403 USER’S MANUAL 3.8 REV 1 Setting the Interface Language Follow the steps below to set the interface language (English, Spanish, or Turkish): a. Start from the “START-UP” menu: 07/25/12 1. RUN TEST 09:06:21 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [2] key (SETUP). b. The following screen will be displayed: 1. RECORD ID 2. PRINT RECORD 3. SAVE/RESTORE RECORD 4. SET TIME 5. SET LANGUAGE Press the [5] key (SET LANGUAGE). c. The following screen will be displayed: 1. ENGLISH 2.
REV 1 3.9 TRM-203 AND TRM-403 USER’S MANUAL Performing a Three-Phase Resistance Test Follow the steps below to perform a three-phase resistance test (we will be testing a Delta type transformer for this example): a. Start from the “START-UP” menu: 07/30/12 1. RUN TEST 13:12:11 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [1] key (RUN TEST). b. The following screen will be displayed: 1. RESISTANCE TEST 2. SPECIAL RES TEST 3. DYNAMIC LTC TEST 4. DEGAUSS WINDING Press the [1] key (RESISTANCE TEST). c.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 For this example, press the [1] key for a Delta type transformer. e. The following menu will be displayed: SELECT TEST CURRENT: 1. 1A 2. 5A 3. 10A 4. 20A 5. 40A 6. CUSTOM Select the test current by pressing the corresponding numeric key on the keypad. Press the [6] key (CUSTOM) if you would like to enter a custom test current and then enter the current (between 1A-40A) on the next screen. f.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL TK: 230.0°C ↑↓ to adjust tk "ENTER" to accept You can increase the Tk value by 0.5°C increments by pressing the [∧] key. You can decrease the Tk value by 0.5°C increments by pressing the [∨] key. Press the [ENTER] key to confirm the temperature setting. Continue to step g. 2. NO Press the [2] key (NO) if you do NOT wish to convert readings to standard temperature. Continue to step i. g. The following screen will be displayed: D.U.T. TEMP: 25.0°C 77.
TRM-203 AND TRM-403 USER’S MANUAL i. REV 1 The following warning screen will be displayed: ***** WARNING! ***** DANGEROUS FLASH-OVER WILL OCCUR IF CABLES ARE DISCONNECTED! ******************** This warning is a reminder that the next sequence of test steps will run current through the test load. Press any key to continue. j. The following screen will be displayed: DELTA 10 amp test "start" to run test or "stop" to abort Press the [START] key to run the test. k.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL The TRM will then ramp up the current and the screen will be updated accordingly: *XFMR CHARGING* H/X1-H/X3 please wait... I = 10.55 AMPS ** XFMR ENERGIZED! ** The TRM determines when the resistance reading is stable and displays the resistance value on the LCD screen as shown below: TEST IN PROGRESS I = 11.27 AMPS R = 1.943 14 Ω "ENTER" TO ACCEPT PHS The TRM will continue the test and update the resistance values on the LCD screen.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 *XFMR CHARGING* H/X2-H/X1 please wait... I = 10.55 AMPS ** XFMR ENERGIZED! ** Once the resistance reading is stable, it will be displayed on the screen: TEST IN PROGRESS I = 11.24 AMPS R = 1.946 9 Ω "ENTER" TO ACCEPT PHS Press the [ENTER] key to save the readings for this phase. m. The following screen will be displayed: TEST IN PROGRESS I = 11.24 AMPS R = 1.946 12 Ω ===> TEST SAVED! <=== The TRM will continue to test the next phase.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL *XFMR CHARGING* H/X3-H/X2 please wait... I = 11.15 AMPS ** XFMR ENERGIZED! ** Once the resistance reading is stable, it will be displayed on the screen: TEST IN PROGRESS I = 11.18 AMPS R = 1.941 7 Ω "ENTER" TO ACCEPT PHS Press the [ENTER] key to save the readings for this phase. n. The following screen will be displayed: TEST IN PROGRESS I = 11.18 AMPS R = 1.942 15 Ω ===> TEST SAVED! <=== Press any key to continue. o.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 p. The following screen will be displayed: SAVE THIS RECORD? 1. YES 2. NO Press the [1] key (YES) to save the test record. q. The following screen will be displayed: RECORD NUMBER 5 HAS BEEN SAVED! If a USB Flash drive is connected to the unit, you will be given the option to save the test record to the USB Flash drive. NOTE Press any key to return to the “START-UP” menu. You can print the test results using the steps in section 3.16.2.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL Figure 4.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 Figure 5.
REV 1 3.10 TRM-203 AND TRM-403 USER’S MANUAL Performing a Single-Phase Resistance Test Follow the steps below to perform a single-phase resistance test: a. Start from the “START-UP” menu: 07/31/12 1. RUN TEST 13:12:11 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [1] key (RUN TEST). b. The following screen will be displayed: 1. RESISTANCE TEST 2. SPECIAL RES TEST 3. DYNAMIC LTC TEST 4. DEGAUSS WINDING Press the [1] key (RESISTANCE TEST). c. The following screen will be displayed: 1. DELTA 2.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 Select the phase to test by pressing the corresponding numeric key on the keypad. For this example, we will be testing phase H/X1-H/X0, so press the [1] key. e. The following screen will be displayed: SELECT TEST CURRENT: 1. 1A 2. 5A 3. 10A 4. 20A 5. 40A 6. CUSTOM Select the test current by pressing the corresponding numeric key on the keypad.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL TK: 230.0°C ↑↓ to adjust tk "ENTER" to accept You can increase the Tk value by 0.5°C increments by pressing the [∧] key. You can decrease the Tk value by 0.5°C increments by pressing the [∨] key. Press the [ENTER] key to confirm the temperature setting. Continue to step g. 2. NO Press the [2] key (NO) if you do NOT wish to convert readings to standard temperature. Continue to step i. g. The following screen will be displayed: D.U.T. TEMP: 25.0°C 77.
TRM-203 AND TRM-403 USER’S MANUAL i. REV 1 The following screen will be displayed: ***** WARNING! ***** DANGEROUS FLASH-OVER WILL OCCUR IF CABLES ARE DISCONNECTED! ******************** This warning is a reminder that the next sequence of test steps will run current through the test load. Press any key to continue. j. The following screen will be displayed: SING PHS H/X1-H/X0 40 amp test "start" to run test or "stop" to abort Press the [START] key to run the test. k.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL The TRM will then ramp up the current and the screen will be updated accordingly: *XFMR CHARGING* H/X1-H/X0 please wait... I = 39.98 AMPS ** XFMR ENERGIZED! ** The TRM determines when the resistance reading is stable and displays the resistance value on the LCD screen as shown below: TEST IN PROGRESS I = 39.91 AMPS R = 1.491 7 mΩ Press the [ENTER] key to save the reading. l. The following screen will be displayed: *XFMR CHARGING* I = 39.91 AMPS R = 1.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 n. The following screen will be displayed: KEEP THIS READING? 1. YES 2. NO Press the [1] key (YES). o. The following screen will be displayed: ===> TEST SAVED! <=== Press any key to continue. p. The following screen will be displayed: SAVE THIS RECORD? 1. YES 2. NO Press the [1] key (YES) to save the test record. q. The following screen will be displayed: RECORD NUMBER 7 HAS BEEN SAVED! Press any key to return to the “START-UP” menu.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL Figure 6.
TRM-203 AND TRM-403 USER’S MANUAL 3.11 REV 1 Performing a Load Tap Changer / Voltage Regulator Resistance Test The Load Tap Changer/Voltage Regulator Resistance Test can be used to conveniently measure the resistance at each tap position. Once the number of taps has been entered, the TRM will request the user to set the tap position, starting with the lower taps, then to neutral, and then to the raise taps. At each tap position, the resistance is measured, displayed on the LCD screen, and stored.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL d. The following screen will be displayed ENTER NUMBER OF RAISE TAPS, NOT COUNTING NEUTRALS (1-16): Type the number of taps the LTC or Voltage Regulator has using the alpha-numeric keypad, and then press the [ENTER] key. We will enter “3” for our example. e. The following screen will be displayed: NUMBER OF NEUT TAPS: 1.ONE 2.THREE 3.FIVE Select the number of neutral taps by pressing the corresponding numeric key on the keypad. f.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 h. The following screen will be displayed: SELECT PHASE: 1. H/X1-H/X0 (YN PH A) 2. H/X2-H/X0 (YN PH B) 3. H/X3-H/X0 (YN PH C) 4. H/X1-H/X3 (Δ PH A) 5. H/X2-H/X1 (Δ PH B) 6. H/X3-H/X2 (Δ PH C) Select the phase to test by pressing the corresponding numeric key. For this example, we will be testing phase H/X1-H/X0, so press the [1] key. i. The following screen will be displayed: SELECT TEST CURRENT: 1. 1A 2. 5A 3. 10A 4. 20A 5. 40A 6.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL WINDING MATERIAL: 1. COPPER, TK=234.5 2. ALUMINUM, TK=225.0 3. MANUALLY ENTER TK Press the [1] key (COPPER, Tk=234.5) to select copper as the winding material. Continue to step k. Press the [2] key (ALUMINUM, Tk=225.0) to select aluminum as the winding material. Continue to step k. Press the [3] key (MANUALLY ENTER Tk) to manually enter the Tk value. The following screen will be displayed: TK: 230.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 Press the [ENTER] key to confirm the D.U.T. temperature setting. l. The following screen will be displayed: REFERENCE TEMP: 75.0°C 167.0°F ↑↓ to adjust tk "ENTER" to accept Use the [∧] and [∨] keys to adjust the reference temperature. Press the [ENTER] key to confirm the reference temperature setting. m. The following screen will be displayed: ***** WARNING! ***** DANGEROUS FLASH-OVER WILL OCCUR IF CABLES ARE DISCONNECTED! ******************** n.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL After the TRM finishes its internal calibration, the following screen will be displayed: *XFMR CHARGING* H/X1-H/X0 please wait... I = 39.98 AMPS ** XFMR ENERGIZED! ** p. The TRM determines when the resistance reading is stable and displays the resistance values on the LCD screen as shown below: TEST IN PROGRESS I = 39.91 AMPS R = 1.491 7 mΩ "ENTER" TO ACCEPT TAP ** XFMR ENERGIZED! ** Press the [ENTER] key to accept and save the readings for this tap. q.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 r. The following screen will be displayed after the last “Raise” position’s resistance reading is stored: PRINT RECORD? 1. YES 2. NO 1. YES Press the [1] key (YES) to print the test results on the built-in thermal printer. A Typical LTC/Voltage Regulator test report is shown in Figure 7. Continue to step s. 2. NO Press the [2] key (NO) to bypass printing of the test results. Continue to step s. s. The following screen will be displayed: SAVE THIS RECORD? 1. YES 2.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL ARE YOU SURE? DATA WILL BE LOST! 1. DO NOT SAVE RECORD 2. SAVE RECORD Press the [1] key (DO NOT SAVE RECORD) to NOT save the test record. You will be returned to the “START-UP” menu.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 Figure 7.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL 3.12 Performing a Special Resistance Test The Special Resistance Test is used to conduct a resistance test for a pre-defined period ranging from 1 to 90 minutes. The resistance data is recorded either at 30 second or 60 second intervals. Use the steps below to perform a Special Resistance Test: a. Start from the “START-UP” ” menu: 07/31/12 1. RUN TEST 13:12:11 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [1] key (RUN TEST). b.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 d. The following screen will be displayed: SPECIAL TEST MODE: 1. 30 SEC INTERVAL (UP TO 45 MIN) 2. 60 SEC INTERVAL (UP TO 90 MIN) Select the test interval by pressing the corresponding numeric key on the keypad. For this example, we will press the [1] key for a 30 second interval. e. The following screen will be displayed: enter special test time minutes (1-45) _ Enter the test time using the alpha-numeric keypad, and then press the [ENTER] key. f.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL 1. YES Press the [1] key (YES) if you wish to convert readings to standard temperature. The following screen will be displayed: WINDING MATERIAL: 1. COPPER, TK=234.5 2. ALUMINUM, TK=225.0 3. MANUALLY ENTER TK Press the [1] key (COPPER, Tk=234.5) to select copper as the winding material. Continue to step h. Press the [2] key (ALUMINUM, Tk=225) to select aluminum as the winding material. Continue to step h.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 h. The following screen will be displayed: D.U.T. TEMP: 25.0°C 77.0°F ↑↓ to adjust tk "ENTER" to accept Use the [∧] and [PAPER ∨ Contrast] keys to adjust the D.U.T. (Device Under Test) temperature. Press the [ENTER] key to confirm the D.U.T. temperature setting. i. The following screen will be displayed: REFERENCE TEMP: 75.0°C 167.0°F ↑↓ to adjust tk "ENTER" to accept Use the [∧] and [∨] keys to adjust the reference temperature.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL k. The following screen will be displayed: SPEC TEST H/X1-H/X0 40 amp test "start" to run test or "stop" to abort Press the [START] key to run the test. l. The following screen will be displayed momentarily: calibrating please wait... After the TRM finishes its internal calibration, the following screen will be displayed: *XFMR CHARGING* please wait... I = 1.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 m. The following screen will be displayed temporarily: MEASURING RES The TRM determines when the resistance reading is stable and shows the resistance value on the LCD screen as shown below (the first line shows the remaining test time): REMAINING TIME = 00:59 I = 39.91 AMPS R = 1.491 mΩ ** XFMR ENERGIZED! ** When the pre-defined test time has elapsed, the following screen will be displayed: TEST RESULTS I = 39.91 AMPS R = 1.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL ARE YOU SURE? DATA WILL BE LOST! 1. DO NOT SAVE RECORD 2. SAVE RECORD Press the [1] key (DO NOT SAVE RECORD) if you do not want to save the record. You will be returned to the “START-UP” menu. Press the [2] key (SAVE RECORD) to save the record. Continue to step o. o. The following screen will be displayed: record number 10 has been saved! Press any key to return to the “START-UP” menu. The test results can be printed using the instructions in section 3.16.2.
TRM-203 AND TRM-403 USER’S MANUAL 3.13 REV 1 Performing a Dynamic LTC Test The Dynamic LTC Test is used to conduct a resistance test while the LTC or Voltage Regulator is switching taps. The test will run for 240 seconds to allow the LTC or Voltage Regulator enough time to switch through all of the taps during the test. The resistance data is recorded continuously during the test period. Use the following steps to perform a Dynamic LTC Test. a. Start from the “START-UP” menu: 07/31/12 1.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL d. The following screen will be displayed: ***** WARNING! ***** DANGEROUS FLASH-OVER WILL OCCUR IF CABLES ARE DISCONNECTED! ******************** This warning reminds the operator that the next sequence of test steps will run current through the test load. Press any key to continue. e. The following screen will be displayed: SET LTC/VREG To LOWEST TAP POSITION.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 After the TRM has finished its internal calibration, the following screen will be displayed: *XFMR CHARGING* please wait... I = 1.90 AMPS ** XFMR ENERGIZED! ** When the TRM has determined that the resistance reading is stable, the following screen will be displayed: PRESS "ENTER" 00:01 OR LTC RAISE/LOWER TO START TIMING... I = 9.98 AMPS Press the [ENTER] key or the LTC [RAISE] or [LOWER] key to continue. h.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL completed cycling through the taps, it is recommended to stop the test manually. If the test is performed for the duration of 240 seconds, the graph printout will be rather long! j. When the test time has expired or the test is stopped manually, the following screen will be displayed. PRINTING REPORT PLEASE WAIT... The test results will be printed on the unit’s built-in thermal printer. A sample test results printout is shown in Figure 9.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 Figure 9.
REV 1 3.14 TRM-203 AND TRM-403 USER’S MANUAL Performing a Diagnostic Test In diagnostic mode, the TRM can run a resistance test, display the sense voltages, and test current on the TRM. This feature can be used to verify the TRM’s voltage and current readings against an external meter. Use the steps below to perform a diagnostic test: a. Start from the “START-UP” menu: 07/31/12 1. RUN TEST 13:12:11 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [3] key (USER DIAGNOSTICS). b.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 d. The following warning screen will be displayed: ***** WARNING! ***** DANGEROUS FLASH-OVER WILL OCCUR IF CABLES ARE DISCONNECTED! ******************** Press any key to continue. e. The following screen will be displayed: - USER DIAG TEST "START" TO RUN TEST OR "STOP" TO ABORT Press the [START] key. f. The following screen will be displayed: USER DIAGNOSTICS V = 77.71 mV I = 9.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL 3.15 Demagnetizing the Transformer Core You can demagnetize the transformer core using the steps below: a. Start from the “Start-Up” menu: 07/30/12 1. RUN TEST 13:12:11 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [1] key (RUN TEST) b. The following screen will be displayed: 1. RESISTANCE TEST 2. SPECIAL RES TEST 3. DYNAMIC LTC TEST 4. DEGAUSS WINDING Press the [4] key (DEGAUSS WINDING). c. The following screen will be displayed: 1. DELTA 2.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 e. The following screen will be displayed: THIS MAY TAKE SEVERAL MINUTES TO COMPLETE. DEGAUSS: 3 PHS YN "ENTER" TO CONTINUE Press the [ENTER] key to continue. f. The degaussing process will start and updates will be displayed on the screen as shown below: * DEGAUSSING XFMR * H/X1-H/X0 -> SETTING CORE... ** XFMR ENERGIZED! ** * DEGAUSSING XFMR * H/X1-H/X0 SETTING CORE... -> CHARGING REVERSE ** XFMR ENERGIZED! ** * DEGAUSSING XFMR * H/X1-H/X0 SETTING CORE...
REV 1 3.16 TRM-203 AND TRM-403 USER’S MANUAL Working with Test Records 3.16.1. Saving Test Records After performing a test, the user is presented the option to save the test results to the unit’s Flash EEPROM or to a connected 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.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 Press the [2] key (SAVE RECORD). 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. d. The following screen will be displayed: 1. SAVE INTERNALLY 2. SAVE TO THUMB DRIVE 1. SAVE INTERNALLY Press the [1] key (SAVE INTERNALLY) to save the test record to the unit’s Flash EEPROM. Continue to step e. 2.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL 3.16.2. Printing the Contents of the Working Memory Whenever a test is performed and the reading is kept, the data is temporarily stored in the TRM’s working memory. You can print the test reading in the unit’s working memory using the steps below: a. Start from the “START-UP” menu: 07/26/12 1. RUN TEST 13:45:35 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [2] key (SETUP). b. The following screen will be displayed: 1. RECORD ID 2. PRINT RECORD 3.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 3.16.3. Printing a Test Record Directory A listing of all the test records in the TRM’s internal Flash EEPROM or on a connected USB Flash drive can be printed on the built-in thermal printer using the steps below: a. Start from the “START-UP” menu: 07/26/11 1. RUN TEST 13:45:35 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [2] key (SETUP). b. The following screen will be displayed: 1. RECORD ID 2. PRINT RECORD 3. SAVE/RESTORE RECORD 4. SET TIME 5.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL d. The following screen will be displayed: 1. INTERNAL DIRECTORY 2. THUMB DRIVE DIR 1. INTERNAL DIRECTORY Press the [1] key (INTERNAL DIRECTORY) to print a directory of test records stored in the unit’s Flash EEPROM. Continue to step e. 2. THUMB DRIVE DIR Press the [2] key (THUMB DRIVE DIR) to print a directory of test records stored on a connected USB Flash drive.
TRM-203 AND TRM-403 USER’S MANUAL Figure 10. Sample Thumb Drive Test Record Directory Printout REV 1 Figure 11.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL 3.16.4. Restoring a Test Record Use the steps below to restore a test record from the TRM’s internal Flash EEPROM or a connected USB Flash drive to the working memory: a. Start from the “START-UP” menu: 07/27/12 1. RUN TEST 07:45:35 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [2] key (SETUP). b. The following screen will be displayed: 1. RECORD ID 2. PRINT RECORD 3. SAVE/RESTORE RECORD 4. SET TIME 5. SET LANGUAGE Press the [3] key (SAVE/RESTORE RECORD). c.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 d. The following screen will be displayed: 1. INTERNAL STORAGE 2. THUMB DRIVE 1. INTERNAL STORAGE Press the [1] key (INTERNAL STORAGE) to restore a test record from the unit’s internal Flash EEPROM. Continue to step e. 2. THUMB DRIVE Press the [2] key (THUMB DRIVE) to restore a test record from a connected USB Flash drive. The following screen will be displayed: RESTORE THUMB DRIVE REC_ Type the record number using the keypad and then press the [ENTER] key.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL e. The following screen will be displayed: RESTORE RECORD 1. ENTER RECORD NUMBER 2. SCROLL TO SELECT 1. ENTER RECORD NUMBER Press the [1] key (ENTER RECORD NUMBER) to quickly restore a specific record number from the unit’s internal Flash EEPROM. If you do not know the record number, you can first print a test shot directory (see section 3.16.3).
TRM-203 AND TRM-403 USER’S MANUAL REV 1 2. SCROLL TO SELECT Press the [2] key (SCROLL TO SELECT) to scroll through the test records stored in the unit’s Flash EEPROM and then select one to be restored. The following screen will be displayed: RECORD DIRECTORY "UP" TO SCROLL FWD "DWN" TO SCROLL RVS Press either the [∧] or the [∨] key.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL 3.16.5. 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. Make sure a USB Flash drive is connected to the unit’s “USB MEM” port, and then start from the “START-UP” menu: 07/27/12 1. RUN TEST 07:45:35 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [2] key (SETUP). b. The following screen will be displayed: 1. RECORD ID 2. PRINT RECORD 3.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 d. The following screen will be displayed: COPY REC TO THUMB DRV 1.COPY SINGLE RECORD 2.COPY ALL RECORDS 1. COPY SINGLE RECORD Press the [1] key (COPY SINGLE RECORD) to copy a single test record from the unit’s Flash EEPROM to the connected USB Flash drive. The following screen will be displayed: ENTER RECORD NUMBER TO COPY TO FLASH DRV NUMBER: Type the record number using the alpha-numeric keypad and then press the [ENTER] key.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL 2. COPY ALL RECORDS Press the [2] key (COPY ALL RECORDS) to copy all test records from the TRM’s Flash EEPROM to the connected USB Flash drive. All test records will be copied from the unit to the connected USB Flash drive. The following screen will be displayed when the process is finished: ALL RECORDS HAVE BEEN TRANSFERRED TO THUMB DRIVE! Press any key to return to the “START-UP” menu.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 3.16.6. Erasing Test Records Use the steps below to erase test records from the TRM’s Flash EEPROM or from a connected USB Flash drive: a. Start from the “START-UP” menu: 07/27/12 1. RUN TEST 08:55:25 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [2] key (SETUP). b. The following screen will be displayed: 1. RECORD ID 2. PRINT RECORD 3. SAVE/RESTORE RECORD 4. SET TIME 5. SET LANGUAGE Press the [3] key (SAVE/RESTORED RECORD). c.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL d. The following screen will be displayed: 1. ERASE INTERNAL REC 2. ERASE THUMB DRV REC 1. ERASE INTERNAL REC Press the [1] key (ERASE INTERNAL REC) if you would like to erase test records that are stored in the unit’s internal Flash EEPROM. Continue to step e. 2. ERASE THUMB DRV REC Press the [2] key (ERASE THUMB DRV REC) if you would like to erase test records that are stored on a connected USB Flash drive. The following screen will be displayed: ERASE RECORD 1.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 THUMB DRIVE REC_001 ERASED! Press any key to continue. The following screen will be displayed allowing you to continue deleting additional records from the connected USB Flash drive: ERASE RECORD 1. ERASE SINGLE REC 2. ERASE ALL RECORDS "STOP" TO EXIT Follow the steps above to erase additional records or press the [STOP] key to return to the “START-UP” menu. 2.
REV 1 TRM-203 AND TRM-403 USER’S MANUAL ALL THUMB DRIVE RECORDS ERASED! Press any key to return to the “START-UP” menu. e. The following screen will be displayed: ERASE RECORD 1. ERASE SINGLE REC 2. ERASE ALL RECORDS "STOP" TO EXIT 1. ERASE SINGLE REC Press the [1] key (ERASE SINGLE REC) to erase a single test record from the unit’s Flash EEPROM. The following screen will be displayed: ERASE RECORD NUMBER: Type the record number that you would like to erase and then press the [ENTER] key.
TRM-203 AND TRM-403 USER’S MANUAL REV 1 ERASE RECORD 1. ERASE SINGLE REC 2. ERASE ALL RECORDS "STOP" TO EXIT Follow the steps above to erase additional records or press the [STOP] key to return to the “START-UP” menu. 2. ERASE ALL RECORDS Press the [2] key (ERASE ALL RECORDS) to erase all test records from the unit’s Flash EEPROM. The following screen will be displayed: ERASE ALL RECORDS! ARE YOU SURE? "ENTER" TO CONTINUE Press the [ENTER] key to continue (or you can press the [STOP] key to cancel).
REV 1 TRM-203 AND TRM-403 USER’S MANUAL 3.17 Converting Resistance Measurements The TRM can convert the resistance reading of the device under test at its present temperature to the equivalent resistance value at a different temperature.
1520 S. Hellman Ave • Ontario, CA 91761 • USA Phone: 909-923-9390 • Fax: 909-923-9391 www.vanguard-instruments.com Copyright © 2012 by Vanguard Instruments Company, Inc. TRM-203/403 User’s Manual • Revision 1.
