TRM-20 and TRM-40 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 2011 Revision 1.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 SAFETY SUMMARY NOTICE This manual applies to both the TRM-20 and TRM-40 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-20/40, damage the test transformer, or cause errors in the test results.
REV 1 TRM-20 AND TRM-40 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-20 AND TRM-40 USER’S MANUAL REV 1 LIST OF FIGURES Figure 1. TRM-20/40 Controls and Indicators ................................................................................ 5 Figure 2. Typical Connections to a Load Tap Changer (LTC) ......................................................... 17 Figure 3. Typical TRM Connections Diagram for A Dynamic Resistance Test .............................. 17 Figure 4. Typical TRM Connections Diagram for 2 Windings................................................
REV 1 TRM-20 AND TRM-40 USER’S MANUAL CONVENTIONS USED IN THIS DOCUMENT This document uses the following conventions: • Both the TRM-20 and TRM-40 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-20 AND TRM-40 USER’S MANUAL 1.0 INTRODUCTION 1.1 General Description and Features REV 1 The TRM-20 and TRM-40 are Vanguard Instruments’ third generation transformer winding resistance meters. The TRM line is designed specifically to measure DC resistance values of transformer windings, rotating machine windings, or any dc resistance of an inductive device.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL User Interface The TRM features a back-lit graphic LCD screen (124x64) that is clearly viewable in both bright sunlight and low-light levels. An alpha-numeric keypad is used to enter test information and to operate the unit. Computer Interfaces The TRM can be connected to a PC via the unit’s RS-232C, USB, or Bluetooth interface. A PC can be used to retrieve test records (stored in the TRM or USB Flash drive) or to run tests using the provided software.
TRM-20 AND TRM-40 USER’S MANUAL 1.2 REV 1 Technical Specifications Table 1. TRM-20/40 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: 33 lbs (15.4Kg) OPERATING VOLTAGE 100-240 Vac, 50/60 Hz RESISTANCE READING 1 micro-ohm – 2000 Ohms (TRM-20); RANGE 1 micro-ohm to 500 Ohms (TRM-40) ACCURACY TEST CURRENT 1 – 19,999 micro-ohms: ±0.
REV 1 1.3 TRM-20 AND TRM-40 USER’S MANUAL TRM Controls and Indicators The TRM-20/40’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-20 AND TRM-40 USER’S MANUAL 2.0 PRE-TEST SETUP 2.1 Operating Voltages REV 1 The TRM’s operating voltages are 90-240 Vac, 50/60 Hz. 2.2 LCD Screen Contrast Control To increase the LCD screen contrast, press and hold the [PAPER ∧ Contrast] key for two seconds. To decrease the LCD screen contrast, press and hold the [PAPER ∨ Contrast] key for two seconds. 2.3 Printer Paper Control To advance the TRM printer paper, press and release the [PAPER ∧ Contrast] key.
REV 1 2.5 TRM-20 AND TRM-40 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-20 AND TRM-40 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-20 AND TRM-40 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-20 AND TRM-40 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-20 AND TRM-40 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-20 AND TRM-40 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-20 AND TRM-40 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-20 AND TRM-40 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-20 AND TRM-40 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-20 AND TRM-40 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-20 AND TRM-40 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-20/40 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-20 AND TRM-40 USER’S MANUAL REV 1 Figure 4.
REV 1 3.5 TRM-20 AND TRM-40 USER’S MANUAL General Procedures 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. Insert current-cable plugs and voltage-sensing cable plugs into the corresponding control panel jacks. d.
TRM-20 AND TRM-40 USER’S MANUAL 3.6 REV 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, 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: 11/01/11 1. RUN TEST 09:06:21 2. SETUP 22°C 72°F 3.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL d. The following screen will be displayed: STATION: _ ↑/↓ TO POSITION "ENTER" TO ACCEPT Type the station name using the alpha-numeric 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 alpha-numeric keypad and then press the [ENTER] key. f.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 g. The following screen will be displayed: MODEL: _ ↑/↓ TO POSITION "ENTER" TO ACCEPT Type the model information using the alpha-numeric 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 alpha-numeric keypad and then press the [ENTER] key. i.
REV 1 j. TRM-20 AND TRM-40 USER’S MANUAL 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.
TRM-20 AND TRM-40 USER’S MANUAL 3.7 REV 1 Setting the Date and Time To set the date and time: a. Start from the “START-UP” menu: 11/01/11 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 [4] key (SET TIME). c. The following screen will be displayed: ENTER DATE MM-DD-YY _ Type the current date using the keypad.
REV 1 3.8 TRM-20 AND TRM-40 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: 11/01/11 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.
TRM-20 AND TRM-40 USER’S MANUAL 3.9 REV 1 Performing a Resistance Test a. Start from the “START-UP” menu: 11/01/11 1. RUN TEST 09:06:21 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: LTC OR VTG REGULATOR? 1. YES 2. NO Press the [2] key (NO). d.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL 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. The following screen will be displayed: CONVERT READINGS TO STANDARD TEMP? 1. YES 2. NO 1.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 TK: 230.0°C ↑↓ to adjust tk "ENTER" to accept You can increase the Tk value by 0.5°C increments by pressing the [PAPER ∧ Contrast] key. You can decrease the Tk value by 0.5°C increments by pressing the [PAPER ∨ Contrast] 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.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL Press the [ENTER] key to confirm the reference temperature setting. The TRM will calculate the equivalent resistance value at this new temperature. NOTE i. 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.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 After the TRM finishes its internal calibration, the following screen will be displayed: *XFMR CHARGING* please wait... ** XFMR ENERGIZED! ** This is only an informational screen to remind the operator that a test is in progress. The display duration of this message depends on the size of the winding’s inductance. l.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL Once the data is saved, the following screen will be displayed: TEST IN PROGRESS 14 ===> TEST SAVED! <=== I = 10.01 AMPS R1 = 1.465 R2 = 1.448 mΩ mΩ ** XFMR ENERGIZED! ** Press the [STOP] key to stop running the test. The test results will be displayed as shown: TEST RESULTS I = 10.01 AMPS R1 = 1.465 R2 = 1.448 mΩ mΩ Press any key to continue. m. The following screen will be displayed: PRINT TEST RESULTS? 1. YES 2. NO 1.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 n. The following screen will be displayed: KEEP THIS READING? 1. YES 2. NO 1. YES Press the [1] key (YES) to save the reading. One of the following screens will be displayed: The following screen will be displayed if there is no previous data in the memory: ===> TEST SAVED! <=== The following screen will be displayed if previous data for the same test type is stored in the memory: PREVIOUS DATA IN BUF 11/03/11 14:49:09 1. APPEND PREV. DATA 2. CLEAR PREV.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL 2. NO If you do not wish to save the reading, press the [2] key (NO) and continue to step o. o. The following screen will be displayed: RUN ANOTHER TEST? 1. YES 2. NO Press the [1] key (YES) to run another test. Return to step b. Press the [2] key (NO) if you do not want to run another test. Continue to step p. p. The following screen will be displayed: SAVE THIS RECORD? 1. YES 2. NO 1. YES Press the [1] key (YES) to save the test record. Continue to step q. 2.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 q. The following screen will be displayed: record number 01 has been saved! The record number is automatically assigned and incremented by the TRM. NOTE Press any key to return to the “START-UP” menu. Figure 5.
REV 1 3.10 TRM-20 AND TRM-40 USER’S MANUAL 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.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 d. The following screen will be displayed ENTER NUMBER OF RAISE TAPS, NOT COUNTING NEUTRAL (1-23): 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: 3 LOWER, -N-, 3 RAISE IS THIS CORRECT? 1.YES 2.NO If the tap information is correct, press the [1] key (YES) and continue to step f.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL g. 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. 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. h. The following screen will be displayed: CONVERT READINGS TO STANDARD TEMP? 1. YES 2. NO 1.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 TK: 230.0°C ↑↓ to adjust tk "ENTER" to accept You can increase the Tk value by 0.5°C increments by pressing the [PAPER ∧ Contrast] key. You can decrease the Tk value by 0.5°C increments by pressing the [PAPER ∨ Contrast] key. Press the [ENTER] key to confirm the temperature setting. Continue to step i. 2. NO Press the [2] key (NO) if you do NOT wish to convert readings to standard temperature. Continue to step k. i. The following screen will be displayed: D.U.T.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL Press the [ENTER] key to confirm the reference temperature setting. The TRM will calculate the equivalent resistance value at this new temperature. NOTE k. The following screen will be displayed: ***** WARNING! ***** DANGEROUS FLASH-OVER WILL OCCUR IF CABLES ARE DISCONNECTED! ******************** Press any key to continue. l.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 After the TRM finishes its internal calibration, the following screen will be displayed: *XFMR CHARGING* please wait... I = 1.01 AMPS ** XFMR ENERGIZED! ** n. 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 = 40.04 AMPS R1 = 1.461 R2 = 1.469 14 mΩ mΩ ** XFMR ENERGIZED! ** Press the [ENTER] key to accept and save the readings. o.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL p. After saving the readings, the following screen will be displayed: set tap to 2 lower ("START" to CONTINUE) ** XFMR ENERGIZED! ** Set the LTC or Voltage Regulator tap position to the position indicated on the LCD screen and press the [START] key. The TRM will continue the test and display the results as in step n. Repeat steps l through o for all “Lower” positions and then through all “Raise” positions. q.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 record number 02 has been saved! Press any key to return to the “START-UP” menu. 2. NO If you do not wish to save the test record, press the [2] key (NO). The following screen will be displayed: 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.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL Figure 6.
TRM-20 AND TRM-40 USER’S MANUAL 3.11 REV 1 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 45 minutes. The resistance data is recorded at one minute intervals. Use the steps below to perform a Special Resistance Test: a. Start from the “START-UP” ” menu: 11/07/11 1. RUN TEST 08:49:15 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [1] key (TEST XFMR). b. The following screen will be displayed: 1.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL d. The following screen will be displayed: enter special test time minutes (1-45) _ Enter the test time (between 1 to 45 minutes) using the alpha-numeric keypad, and then press the [ENTER] 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.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 Press the [1] key (COPPER, Tk=234.5) to select copper as the winding material. Continue to step g. Press the [2] key (ALUMINUM, Tk=225) to select aluminum as the winding material. Continue to step g. Press the [3] key (MANUALLY ENTER Tk) to manually enter the Tk value. The following screen will be displayed: TK: 230.0°C ↑↓ to adjust tk "ENTER" to accept You can increase the Tk value by 0.5°C increments by pressing the [PAPER ∧ Contrast] key.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL h. The following screen will be displayed: REFERENCE TEMP: 75.0°C 167.0°F ↑↓ to adjust tk "ENTER" to accept Use the [PAPER ∧ Contrast] and [PAPER ∨ Contrast] keys to adjust the reference temperature. Press the [ENTER] key to confirm the reference temperature setting. i.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 k. 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 = 1.01 AMPS ** XFMR ENERGIZED! ** This is only an informational screen to remind the operator that a test is in progress. The display duration of this message depends on the size of the winding’s inductance. l.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL m. The following screen will be displayed: SAVE THIS RECORD? 1. YES 2. NO 1. YES Press the [1] key (YES) to save the test record. Continue to step m. 2. NO Press the [2] key (NO) if you do not want to save the test record. The following screen will be displayed: ARE YOU SURE? DATA WILL BE LOST! 3. DO NOT SAVE RECORD 4. 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.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 Figure 7.
REV 1 3.12 TRM-20 AND TRM-40 USER’S MANUAL 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.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 d. The following screen will be displayed: SET LTC/VREG To LOWEST TAP POSITION. PRESS ANY KEY WHEN READY Set the LTC or Voltage Regulator to the lowest position either manually or by pressing and holding the LTC [LOWER] button. Press any key to continue. e. The following warning screen will be displayed: DYNAMIC LTC TEST "START" TO RUN TEST OR "STOP" TO ABORT Press the [START] key to run the test. f.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL READY TO CAPTURE DATA PRESS "ENTER" - OR LTC RAISE/LOWER TO START TIMING... Press the [ENTER] key or the LTC [RAISE] or [LOWER] key to continue. g. The TRM will start capturing data and the following screen will be displayed: RUNNING DYNAMIC LTC TEST T=239 "STOP" TO END TEST ** XFMR ENERGIZED! ** The second line on the screen will display the remaining time for the test.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 1. YES Press the [1] key (YES) to save the test results to the connected USB Flash drive. The following screen will be displayed: REC_001 SAVED TO THUMB DRIVE. Press any key to return to the “START-UP” menu. 2. NO Press the [2] key (NO) if you do not want to save the test results. The following screen will be displayed: ARE YOU SURE? DATA WILL BE LOST! 1.DO NOT SAVE RECORD 2.SAVE RECORD Press the [1] key (DO NOT SAVE RECORD).
REV 1 TRM-20 AND TRM-40 USER’S MANUAL Figure 8.
TRM-20 AND TRM-40 USER’S MANUAL 3.13 REV 1 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: 11/07/11 1. RUN TEST 08:49:15 2. SETUP 22°C 72°F 3. USER DIAGNOSTICS Press the [3] key (USER DIAGNOSTICS). b.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL d. The following screen will be displayed: - USER DIAG TEST "START" TO RUN TEST OR "STOP" TO ABORT Press the [START] key. e. The V1, V2, and test current (I) will be displayed as shown below: USER DIAGNOSTICS V1 = 35.86 mV V2 = 38.43 mV I = 20.020 A ** XFMR ENERGIZED! ** Press the [STOP] key to end the test and return to the “START-UP” menu.
TRM-20 AND TRM-40 USER’S MANUAL 3.14 REV 1 Demagnetizing the Transformer Core You can demagnetize the transformer core using the steps below: a. Start from the “Start-Up” menu: 11/07/11 1. RUN TEST 08:49:15 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: DEGAUSS CURRENT: 1. 0.5 AMP 2.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL e. The degaussing process will start and updates will be displayed on the screen as shown below: * DEGAUSSING XFMR * -> SETTING CORE... ** XFMR ENERGIZED! ** * DEGAUSSING XFMR * SETTING CORE... -> CHARGING REVERSE ** XFMR ENERGIZED! ** * DEGAUSSING XFMR * SETTING CORE... CHARGING REVERS -> RESETTING CORE ** XFMR ENERGIZED! ** When the process is complete, you will be returned to the “START-UP” menu.
TRM-20 AND TRM-40 USER’S MANUAL 3.15 REV 1 Working with Test Records 3.15.1. Viewing the Contents of the Working Memory Whenever a test is performed and the reading is kept, the data is temporarily stored in the TRM’s working memory. You can view the test reading in the unit’s working memory using the steps below: a. Start from the “START-UP” menu: 11/07/11 1. RUN TEST 08:49:15 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.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL 2. PRINT TO PRINTER Press the [2] key (PRINT TO PRINTER) to print the test record on the unit’s thermal printer. You will then be returned to the “START-UP” menu.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 3.15.2. 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.
REV 1 TRM-20 AND TRM-40 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. 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. SAVE TO THUMB DRIVE Press the [2] key (SAVE TO THUMB DRIVE) to save the test record to the connected USB Flash Drive.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 3.15.3. Restoring a Test Record From Flash EEPROM Use the steps below to restore a test record from the TRM’s internal Flash EEPROM to the working memory: a. Start from the “START-UP” menu: 11/09/11 1. RUN TEST 12:13:15 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.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL d. The following screen will be displayed: RESTORE RECORD 1. ENTER RECORD NUMBER 2. SCROLL TO SELECT If you have a USB Flash drive inserted in the unit’s “USB MEM” port, the following screen will be displayed instead of the above screen: NOTE 1. INTERNAL STORAGE 2. THUMB DRIVE Press the [1] key (INTERNAL STORAGE). The following screen will be displayed: RESTORE RECORD 1. ENTER RECORD NUMBER 2. SCROLL TO SELECT Continue with the steps below. 1.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 RECORD RESTORED! PRINT RECORD? 1.YES 2.NO Press the [1] key (YES) if you would like to print the restored test record on the unit’s built-in thermal printer. You will be returned to the “START-UP” menu after printing is finished. Press the [2] key (NO) if you do not want to print the restored test record. You will be returned to the “START-UP” menu. 2. SCROLL TO SELECT Press the [2] key (SCROLL TO SELECT) to scroll through a directory of the test records.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL RECORD RESTORED! PRINT RECORD? 1.YES 2.NO Press the [1] key (YES) if you would like to print the restored test record on the unit’s built-in thermal printer. You will be returned to the “START-UP” menu after printing is finished. Press the [2] key (NO) if you do not want to print the restored test record. You will be returned to the “START-UP” menu.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 3.15.4. 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 TRM’s working memory: a. Make sure the USB Flash drive containing the test record(s) is inserted in the TRM’s USB Flash drive port (“USB MEM” port). Then start from the “START-UP” menu: 11/10/11 1. RUN TEST 12:13:15 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.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL d. The following screen will be displayed: 1. INTERNAL STORAGE 2. THUMB DRIVE Press the [2] key (THUMB DRIVE). e. The following screen will be displayed: RESTORE THUMB DRIVE REC_ Type the record number that you would like to restore using the alpha-numeric keypad and then press the [ENTER] key. f. The test record will be restored to the unit’s working memory, and the following screen will be displayed: REC_001 RESTORED! PRINT RECORD? 1.YES 2.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 3.15.5. 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: 11/11/11 1. RUN TEST 13:13:15 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.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL 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.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 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.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL 3.15.6. Printing a Test Record Directory Use the steps below to print a directory of the test records stored in the TRM’s Flash EEPROM: a. Start from the “START-UP” menu: 11/10/11 1. RUN TEST 12:13:15 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-20 AND TRM-40 USER’S MANUAL REV 1 d. The following screen will be displayed: PRINT DIRECTORY 1. FULL DIRECTORY 2. SHORT DIRECTORY Press the [1] key (FULL DIRECTORY) to print the entire directory of test records. After the directory is printed, you will be returned to the “START-UP” menu. Press the [2] key (SHORT DIRECTORY) to print a short directory. This lists the last 10 records stored in the TRM’s memory. After the directory is printed, you will be returned to the “START-UP” menu.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL 3.15.7. Erasing Test Records from the Flash EEPROM Follow the steps below to erase test records from the unit’s Flash EEPROM: a. Start from the “START-UP” menu: 11/10/11 1. RUN TEST 12:13:15 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 (RESTORE RECORD). c. The following screen will be displayed: 1.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 d. The following screen will be displayed: ERASE RECORD 1. ERASE SINGLE REC. 2. ERASE ALL RECORDS "STOP" TO EXIT If you have a USB Flash drive inserted in the unit’s “USB MEM” port, the following screen will be displayed instead of the above screen: NOTE 1. ERASE INTERNAL REC 2. ERASE THUMB DRV REC Press the [1] key (ERASE INTERNAL REC). The following screen will be displayed: ERASE RECORD 1. ERASE SINGLE REC. 2.
REV 1 TRM-20 AND TRM-40 USER’S MANUAL RECORD NUMBER 21 ERASED! Press any key to return to the “START-UP” menu. 2. ERASE ALL RECORDS Press the [2] key (ERASE ALL RECORDS) to erase all records stored in the TRM’s Flash EEPROM. The following screen will be displayed: ERASE ALL RECORDS! ARE YOU SURE? "ENTER" TO CONTINUE You can press the [STOP] key to cancel the process and return to the “STARTUP” menu. Press the [ENTER] key to proceed with deleting all the test records from the unit’s Flash EEPROM.
TRM-20 AND TRM-40 USER’S MANUAL 3.16 REV 1 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” menu: 11/10/11 1. RUN TEST 12:13:15 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-20 AND TRM-40 USER’S MANUAL 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 connected USB Flash drive. The following screen will be displayed: ERASE THUMB DRIV REC_ Type the record number that you would like to erase using the alpha-numeric keypad and then press the [ENTER] key.
TRM-20 AND TRM-40 USER’S MANUAL REV 1 Press the [STOP] key if you do not want to erase all the test records. You will be returned to the “START-UP” menu. Press the [ENTER] key to proceed with deleting all the test records from the connected USB Flash drive. The following screen will be displayed when all the records have been erased: ALL THUMB DRIVE RECORDS ERASED! Press any key to return to the “START-UP” menu.
REV 1 3.17 TRM-20 AND TRM-40 USER’S MANUAL 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 © 2011 by Vanguard Instruments Company, Inc. TRM-20/40 User’s Manual • Revision 1.
