Vanguard Instruments TRM-20 User Manual Download Page 1

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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

August 2017

Revision 1.5

Summary of Contents for TRM-20

Page 1: ...RM 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 August 2017 Revision 1 5...

Page 2: ...g including test preparation test lead connection actual testing and test lead disconnection SAFETY WARNING AND CAUTIONS The TRM 20 40 shall be used only by trained operators All transformers under te...

Page 3: ...st Record Header Information 20 3 7 Setting the Date and Time 23 3 8 Setting the Interface Language 24 3 9 Performing a Resistance Test 25 3 10 Performing a Load Tap Changer Voltage Regulator Resistan...

Page 4: ...al Single Phase TRM Connections 18 Figure 5 Typical TRM Connections Diagram for 2 Windings 18 Figure 6 Typical Resistance Test Results Printout 33 Figure 7 Typical LTC Voltage Regulator Test Report Pr...

Page 5: ...RM 40 S USED IN the followin 0 and TRM 4 s used only in knob on the e referenced output is sh ns are provid ption 3 shou es are indica arning mess are indicate te details USER S MA N THIS DO ng conven...

Page 6: ...gs against the factory test resistance values A special test mode allows the TRM to collect data automatically for up to 90minutes at 60 second sampling interval or 45 minutes at 30 second sampling in...

Page 7: ...s 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 u...

Page 8: ...windin H x 9 D 53 cm 50 60 Hz 2000 Ohms to 500 Ohms micro ohms 0 iohms 1 re ms 1 5 read ncrements TR ing 18V DC m sistance readin 64 x 128 dot g wide thermal pr ords Each reco st records on e SB and B...

Page 9: ...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 s...

Page 10: ...the TRM printer paper press and release the key 2 4 Printer Paper The TRM s built in thermal printer uses 2 5 inch wide thermal paper for printing test results To maintain the highest print quality a...

Page 11: ...p mal paper rmal paper w USER S MA al Printer P sed inside a w rinter cover rmal paper r paper roll nto the slot cally pull the the paper ho d align the th er a chemical co rint head In will show a re...

Page 12: ...on the power on the TRM d If this is the first time you are connecting the unit to the PC Windows will recognize it as a new device and automatically install necessary drivers If using Windows XP you...

Page 13: ...the Settings icon The following window will be displayed Make sure the Use USB Port option is UN checked Then from the COM Port drop down menu select the COM port that corresponds to the port that the...

Page 14: ...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 The My Bluet...

Page 15: ...ext 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 The...

Page 16: ...een 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 numbe...

Page 17: ...MANUAL 13 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...

Page 18: ...tooth 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...

Page 19: ...R S MANUAL 15 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 displa...

Page 20: ...evices 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 C...

Page 21: ...lt in he test clips ely discharge he transform M Connection ANUAL Tap Chang tions to a Loa ections ect any test l ent is being c n electric sh from the tra ed the transf mer bushing ns Diagram fo ger...

Page 22: ...TRM 20 AND TRM 40 USER S MANUAL REV 1 5 18 Figure 4 Typical Single Phase TRM Connections Figure 5 Typical TRM Connections Diagram for 2 Windings...

Page 23: ...l t cable plugs l jacks st cable clam TRM self calibrate w TEST P DIAGNOST USER S MA M are outline ubstation gr nect the TRM any transfor TRM le into a pow s and voltag mps to the tr e and then TICS 1...

Page 24: ...s been entered it will apply to all subsequent test records To enter the header information a Start from the START UP menu Press the 2 key SETUP b The following screen will be displayed Press the 1 ke...

Page 25: ...ng the keypad and then press the ENTER key f The following screen will be displayed Type the manufacturer name using the keypad and then press the ENTER key g The following screen will be displayed Ty...

Page 26: ...pe the transformer s KVA rating using the keypad and then press the ENTER key j The following screen will be displayed Type the operator s name using the keypad and then press the ENTER key All header...

Page 27: ...The following screen will be displayed Type the current date using the keypad The following screen will be displayed Enter the time using the keypad When the time has been entered you will be immediat...

Page 28: ...T LANGUAGE c The following screen will be displayed Select the preferred interface language by pressing the corresponding key on the keypad 1 2 or 3 The interface language will be set and a confirmati...

Page 29: ...be displayed Press the 2 key NO d The following screen will be displayed Press the 1 key V1 V2 RES TEST if you would like to perform a V1 V2 test Press the 2 key V1 ONLY RES TEST if you would like to...

Page 30: ...f you wish to convert readings to standard temperature The following screen will be displayed Press the 1 key COPPER Tk 234 5 to select copper as the winding material Continue to step g Press the 2 ke...

Page 31: ...onvert readings to standard temperature Continue to step i g The following screen will be displayed Use the PAPER Contrast and PAPER Contrast keys to adjust the D U T Device Under Test temperature Pre...

Page 32: ...TART key t g screen will libratin ease wai V2 TE 0 amp te t to ru or op to a WARNING OUS FLAS CCUR IF SCONNECT to confirm t calculate the reen will be er that the n e be displaye to run the te be dis...

Page 33: ...ge dep en the resist n as shown b he test and u ess you can reen to the is process ca anger LTC e Please see ge Regulato ressed the d een RESS 14 ST AMPS m m ZED RESS 14 AMPS m m ING t ZED ANUAL libra...

Page 34: ...lowing screen will be displayed 1 YES Press the 1 key YES to print the test results on the built in thermal printer A sample test results printout is shown in Figure 6 Continue to step n 2 NO Press th...

Page 35: ...working memory When a test is finished the user can append the new test results to the previous test results in the working memory as long as the unit s power has not been turned off between tests Pr...

Page 36: ...ollowing screen will be displayed 1 YES Press the 1 key YES to save the test record Continue to step q 2 NO Press the 2 key NO if you do not want to save the test record The following screen will be d...

Page 37: ...cord n has been ND TRM 40 g screen will e record num y to return to Figure 6 number 0 n saved USER S MA be displaye mber is auto o the START Typical Res 01 ANUAL d matically ass T UP menu sistance Tes...

Page 38: ...t each tap position the resistance is measured displayed on the LCD screen and stored The TRM then instructs the user to change to the next tap position and repeat the testing process Use the steps be...

Page 39: ...n is correct press the 1 key YES and continue to step f If the tap information is incorrect press the 2 key NO and return to step d f The following screen will be displayed Press the 1 key V1 V2 RES T...

Page 40: ...if you wish to convert readings to standard temperature The following screen will be displayed Press the 1 key COPPER Tk 234 5 to select copper as the winding material Continue to step i Press the 2...

Page 41: ...onvert readings to standard temperature Continue to step k i The following screen will be displayed Use the PAPER Contrast and PAPER Contrast keys to adjust the D U T Device Under Test temperature Pre...

Page 42: ...V2 TE 0 AMP TE ap to 3 T to RU OR OP TO A WARNING OUS FLAS CCUR IF SCONNECT to confirm t calculate the be displaye e be displaye egulator tap ess and hold the button w Press the S be displaye ng t ES...

Page 43: ...elow Press the ENTER key to accept and save the readings o The following screen will be displayed Once the reading has been saved the following screen will be displayed momentarily TEST IN PROGRESS 14...

Page 44: ...e following screen will be displayed after the last Raise position s resistance reading is stored 1 YES Press the 1 key YES to print the test results on the built in thermal printer A Typical LTC Volt...

Page 45: ...u do not wish to save the test record press the 2 key NO The following screen will be displayed Press the 1 key DO NOT SAVE RECORD to NOT save the test record You will be returned to the START UP menu...

Page 46: ...TRM 20 AND TRM 40 USER S MANUAL REV 1 5 42 Figure 7 Typical LTC Voltage Regulator Test Report Printout...

Page 47: ...a Start from the START UP menu Press the 1 key TEST XFMR b The following screen will be displayed Press the 2 key SPECIAL RES TEST c The following screen will be displayed Press the 1 key V1 V2 SPEC T...

Page 48: ...ress 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 1 YES Press the 1 key YES i...

Page 49: ...essing 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 e 2 NO Press...

Page 50: ...he following warning screen will be displayed 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 wi...

Page 51: ...size of the winding s inductance l 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 tim...

Page 52: ...ES to sav NO if you d played DO NOT SA ned to the S SAVE RECO be displaye umber is au t record has or further inf out o the START 03 RE BE LOST SAVE REC CORD RD TRM 20 A d e the test re do not want AV...

Page 53: ...REV 1 5 TRM 20 AND TRM 40 USER S MANUAL 49 Figure 8 Typical Special Test Report Printout...

Page 54: ...AL RES T MIC LTC T USS WINDI TEST P DIAGNOST c LTC Tes conduct a re for 240 seco taps during iod Use the sults can onl our test resu orming this t P menu TEST be displaye MIC LTC TEST be displaye e op...

Page 55: ...d Press the START key to run the test f The following screen will be displayed momentarily After the TRM has finished its internal calibration the following screen will be displayed When the TRM has d...

Page 56: ...est If you have 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 h When th...

Page 57: ...en will be displayed 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 Press the 1 key DO NOT SAVE...

Page 58: ...TRM 20 AND TRM 40 USER S MANUAL REV 1 5 54 Figure 9 Typical Dynamic LTC Test Results Printout Showing an Opened Circuit...

Page 59: ...P menu Press the 3 key USER DIAGNOSTICS b The following screen will be displayed Select the test current by pressing the corresponding numeric key on the keypad Press the 6 key CUSTOM if you would lik...

Page 60: ...splayed Press the START key e The V1 V2 and test current I will be displayed as shown below Press the STOP key to end the test and return to the START UP menu USER DIAGNOSTICS V1 35 86 mV V2 38 43 mV...

Page 61: ...ING c The following screen will be displayed Select the degaussing current by pressing the corresponding key on the alpha numeric keypad d The following screen will be displayed Press the ENTER key to...

Page 62: ...l be displayed on the screen as shown below When the process is complete you will be returned to the START UP menu DEGAUSSING XFMR SETTING CORE CHARGING REVERS RESETTING CORE XFMR ENERGIZED DEGAUSSING...

Page 63: ...2 key SETUP b The following screen will be displayed Press the 2 key PRINT RECORD c The following screen will be displayed 1 PRINT TO LCD Press the 1 key PRINT TO LCD to view the test record on the LC...

Page 64: ...TRM 20 AND TRM 40 USER S MANUAL REV 1 5 60 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...

Page 65: ...y SAVE R ORE RECOR RECORD RD DIRECT E RECORD TO THUMB RD ID T RECORD RESTORE TIME LANGUAGE TEST P DIAGNOST USER S MA to a Test R r is presente Drive If the remain in th ormed and th om the work e save...

Page 66: ...RNALLY 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 The foll...

Page 67: ...store a e START UP key SETUP g screen will key SAVE R g screen will tion 5 COPY nnected to t key RESTO ORE RECOR RECORD RD DIRECT E RECORD TO THUMB RD ID T RECORD RESTORE TIME LANGUAGE TEST P DIAGNOST...

Page 68: ...h driv en will be dis ey INTERNA screen will b the steps be NUMBER ENTER REC restore The number using he following E RECORD R ORE RECOR RECORD N L TO SELE NAL STORA DRIVE ORD NUMBER LECT TRM 20 A d ve...

Page 69: ...s the 2 key SCROLL TO SELECT to scroll through a directory of the test records The following screen will be displayed Press the PAPER Contrast key or the PAPER Contrast key to display the next or prev...

Page 70: ...t 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...

Page 71: ...TRM s USB Flash drive port USB MEM port Then start from the START UP menu Press the 2 key SETUP b The following screen will be displayed Press the 3 key SAVE RESTORE RECORD c The following screen will...

Page 72: ...d will be restored to the unit s working memory and the following screen will be displayed Press the 1 key YES if you would like to print the restored test record on the unit s built in thermal printe...

Page 73: ...s USB MEM port and then start from the START UP menu Press the 2 key SETUP b The following screen will be displayed Press the 3 key SAVE RESTORE RECORD c The following screen will be displayed Press...

Page 74: ...B Flash drive The following screen will be displayed Type the record number using the alpha numeric keypad and then press the ENTER key The test record will be copied to the USB Flash drive and the fo...

Page 75: ...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 pro...

Page 76: ...enu Press the 2 key SETUP b The following screen will be displayed Press the 3 key SAVE RESTORE RECORD c The following screen will be displayed Press the 3 key RECORD DIRECTORY 1 RESTORE RECORD 2 SAVE...

Page 77: ...ou 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...

Page 78: ...nu Press the 2 key SETUP b The following screen will be displayed Press the 3 key RESTORE RECORD c The following screen will be displayed Press the 4 key ERASE RECORD 1 RESTORE RECORD 2 SAVE RECORD 3...

Page 79: ...GLE E ALL RE OP TO E USER S MA be displaye USB Flash dr en will be di key ERASE I the steps b C ERASE SING played number that he following E RECORD ER ASE RECOR SINGLE E ALL REC OP TO EX INTERNA E THU...

Page 80: ...o cancel the process and return to the START UP menu Press the ENTER key to proceed with deleting all the test records from the unit s Flash EEPROM The following screen will be displayed during the er...

Page 81: ...b The following screen will be displayed Press the 3 key RESTORE RECORD c The following screen will be displayed Press the 4 key ERASE RECORD d The following screen will be displayed Press the 2 key E...

Page 82: ...test record will be erased from the USB Flash drive and the following screen will be displayed Press any key to continue You will be returned to the beginning of step e Press the STOP key to return to...

Page 83: ...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 t...

Page 84: ...ent resistance value at a different temperature The conversion is accomplished by the following formula Rs Rm Ts Tk Tm Tk Where Rs is the resistance at desired temperature Rm is the measured resistanc...

Page 85: ...S Hellman Ave Ontario CA 91761 USA Phone 909 923 9390 Fax 909 923 9391 www vanguard instruments com Copyright 2017 by Vanguard Instruments Company Inc TRM 20 40 User s Manual Revision 1 5 August 1 201...

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