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REV 1.0

 

WRM-10P S2 USER’S MANUAL

 

 

71

 

 

 

 

 

 

4.2 

Converting Resistance Measurements 

The WRM can convert the resistance reading of the device under test at its present 

temperature to the equivalent 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 resistance 

Ts

 is the desired reference temperature 

Tm

 is the temperature at which the resistance was measured 

Tk

 is the winding material constant 

 

Tk

 = 234.5 for copper 

 

Tk

 = 240.0 for aluminum 

 

Summary of Contents for Vanguard Instruments WRM-10P S2

Page 1: ...WRM 10P S2 TRANSFORMER WINDING RESISTANCE METER USER S MANUAL 1520 S Hellman Avenue Ontario CA 91761 TEL 909 923 9390 FAX 909 923 9391 www vanguard instruments com October 2017 Revision 1 0 ...

Page 2: ...n authorized repair service provider Unauthorized modifications can cause safety hazards and will void the manufacturer s warranty EQUIPMENT RATINGS IP Rating The enclosure for the WRM 10P S2 has an IP rating of 32 Pollution Rating The WRM 10P S2 has a pollution rating of 2 Operating Voltage The WRM 10P S2 is rated for use with an operating voltage of 120V or 240V auto ranging 10 of selected volta...

Page 3: ...tance Test 25 3 8 Performing a Special Resistance Test 32 3 9 Performing a Transient Test 39 3 10 Performing a Diagnostic Test 44 3 11 Working with Test Records 46 3 11 1 Restoring a Test Record from the Unit s Internal Flash EEPROM 46 3 11 2 Restoring a Test Record From a USB Flash Drive 50 3 11 3 Viewing a Test Record 52 3 11 4 Printing a Test Record 54 3 11 5 Saving a Test Record From the Worki...

Page 4: ... Printout 22 Figure 7 Typical V1 and V2 Test Report Printout 23 Figure 8 Typical V1 and V2 Test Report Printout with Multiple Readings 24 Figure 9 Typical LTC Voltage Regulator Test Report Printout 31 Figure 10 Typical Special Test Report Printout 1 minute 10 second intervals 38 Figure 11 Typical Transient Test Report 43 Figure 12 Typical Internal Test Record Directory Printout 61 Figure 13 Typica...

Page 5: ... is referred to as WRM for short A key switch or knob on the WRM 10P S2 is indicated as KEY SWITCH KNOB Menu names are referenced as MENU NAME WRM LCD screen output is shown as Warning messages are indicated as WARNING Warning message Important notes are indicated as NOTE Note details 1 OPTION 1 2 OPTION 2 3 OPTION 3 4 OPTION 4 ...

Page 6: ...ging from 1 micro ohm to 2 000 ohms If the transformer winding temperature is entered the WRM 10P S2 can calculate the equivalent resistance value of the winding material aluminum or copper at any standard reference temperature Also a special test mode can run a test for up to 60 minutes while saving resistance readings at 10 15 20 30 or 60 second intervals In addition to measuring the resistance ...

Page 7: ...in Flash EEPROM Test records can be retrieved and printed on the built in thermal printer or can be transferred to a PC via the USB PC or USB Flash drive interfaces Windows based software is provided with each WRM 10P S2 that can be used to retrieve test records from the unit and can also be used to export records in Microsoft Excel format ...

Page 8: ...d low light levels PRINTER 2 5 inch wide built in thermal printer KEYPAD Rugged QWERTY style membrane keypad INTERNAL TEST RECORD STORAGE Stores 100 test records of 64 readings each COMPUTER INTERFACE USB PC USB Flash drive PC SOFTWARE Windows based software is included with purchase price SAFETY Designed to meet IEC61010 1995 UL61010A 1 CSA C22 2 standards TEMPERATURE Operating 10 C to 50 C 15 F ...

Page 9: ... The purpose of the controls and indicators may seem obvious but users should become familiar with them before using the WRM 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 WRM 10P S2 Controls and Indicators ...

Page 10: ... paper press and release the key To retract the WRM printer paper press and release the key 2 4 Printer Paper The WRM s built in thermal printer uses 2 5 wide thermal paper for printing test results To maintain the highest print quality and to avoid paper jams the use of thermal paper supplied by Vanguard Instruments is highly recommended Additional paper can be ordered from the following sources ...

Page 11: ...Feed the thermal paper into the slot between the paper pocket and the rubber roller The printer will automatically pull the paper under the thermal head Place the paper roll into the paper holder Lift the thermal head and align the thermal paper if necessary Re install the printer cover NOTE Thermal paper has a chemical coating on one side of the paper This side should be facing the thermal print ...

Page 12: ...while high current is being conducted during a test Failure to heed this warning can result in lethal electric shock to personnel and or damage to the equipment Disconnect the test clips from the transformer bushing only after the WRM has completely discharged the transformer Always disconnect the test clips slowly from the transformer bushing to prevent an accidental flash over Figure 2 Typical W...

Page 13: ... NOTE The above figure illustrates the simultaneous testing of both the high and low windings on a single phase transformer When measuring two channels the above cable connection is recommended since it will speed up the testing process Figure 5 Typical WRM Connections Diagram 4 ...

Page 14: ...dure may damage the WRM b Plug the WRM power cable into a power outlet c Insert current cable plugs and voltage sensing cable plugs into the corresponding control panel jacks d Attach the test cable clamps to the transformer terminal for the winding that is to be measured e Turn on the WRM by pressing I on the power rocker switch f The unit will self calibrate and then you will be presented with t...

Page 15: ...has been entered it will apply to all subsequent test records To enter the header information a Start from the START UP menu Press the 4 key SETUP b The following screen will be displayed Press the 1 key ENTER SHOT ID c The following screen will be displayed Type the company name using the keypad and press the ENTER key COMPANY _ TO POSITION ENTER TO ACCEPT 1 ENTER SHOT ID 2 SET TIME 3 SET LANGUAG...

Page 16: ...ng the keypad and press the ENTER key f The following screen will be displayed Type the manufacturer name using the keypad and press the ENTER key g The following screen will be displayed Type the transformer model information using the keypad and press the ENTER key MODEL TO POSITION ENTER TO ACCEPT MANUFACTURER TO POSITION ENTER TO ACCEPT CIRCUIT TO POSITION ENTER TO ACCEPT STATION TO POSITION E...

Page 17: ...displayed Type the transformer s KVA rating using the keypad and press the ENTER key j The following screen will be displayed Type the operator s name using the keypad and press the ENTER key All header information will be saved and you will be returned to the START UP menu OPERATOR TO POSITION ENTER TO ACCEPT KVA TO POSITION ENTER TO ACCEPT SERIAL NUMBER TO POSITION ENTER TO ACCEPT ...

Page 18: ...splayed Enter the month date and year using the keypad When the last digit is entered the following screen will be displayed Enter the hours in 24 hour military format minutes and seconds using the keypad When the last digit is entered the clock will be set and you will be returned to the START UP menu ENTER TIME HH MM SS _ ENTER DATE MM DD YY _ 1 ENTER SHOT ID 2 SET TIME 3 SET LANGUAGE 4 CAL PRIN...

Page 19: ...UP menu Press the 4 key SETUP b The following screen will be displayed Press the 4 key CAL PRINT ON OFF c The following screen will be displayed Press the 1 key ENABLE to enable or the 2 key DISABLE to disable this feature d The following screen will be displayed enabled option shown Press any key to return to the START UP menu CAL DATE PRINTING ENABLED CAL DATE PRINTING 1 ENABLE 2 DISABLE 1 ENTER...

Page 20: ... you would like to perform a V1 test only For this example we will perform a V1 Only Test by pressing the 2 key Please see section 3 8 for information about performing special tests NOTE The WRM 10P S2 s test current is 10 Amps c The following menu will be displayed Press the 2 key NO LTC or VTG REGULATOR 1 YES 2 NO 1 V1 V2 TEST 2 V1 ONLY TEST 3 SPECIAL TEST V1 V2 4 SPECIAL TEST V1 5 TRANSIENT TES...

Page 21: ... Press the 3 key MANUALLY ENTER Tk to manually enter the Tk value The following screen will be displayed 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 e 2 NO Press the 2 key NO if you do NOT wish to convert readings to standard temper...

Page 22: ...etting NOTE The WRM will calculate the equivalent resistance value at this new temperature Please see section 4 2 for further information about how this value is calculated g The 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 NOTE If necessary you can press the STOP key to c...

Page 23: ...ill be displayed 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 NOTE You can bypass this delay and observe the resistance value immediately See section 4 1 for instructions on how to select this option XFMR CHARGING PLEASE WAIT I 9 972 Amps CALIBRATING PLEASE WAIT V1 ONLY TE...

Page 24: ...gs when testing a Load Tap Changer LTC or Voltage Regulator a more convenient method is also available Please see section 3 7 for information about performing an LTC or Voltage Regulator test If the ENTER key is pressed the data is saved and the following screen will be displayed on the LCD screen Once the test is saved the WRM will continue testing and display the resistance value once it has sta...

Page 25: ...ress the 1 key for YES l The following screen will be displayed Press any key to continue m The following screen will be displayed Press the 2 key NO n The following screen will be displayed Press the 1 key YES to print the test results on the built in thermal printer A typical V1 test report printout is shown in Figure 6 PRINT RECORD 1 YES 2 NO RUN TEST AGAIN 1 YES 2 NO TEST 3 SAVED SAVE LAST REA...

Page 26: ...screen will be displayed Press the 1 key YES to save the test record p The following screen will be displayed Press any key to return to the START UP menu Figure 6 Typical V1 Test Report Printout SHOT NUMBER 002 HAS BEEN SAVED SAVE THIS RECORD 1 YES 2 NO ...

Page 27: ...REV 1 0 WRM 10P S2 USER S MANUAL 23 Figure 7 Typical V1 and V2 Test Report Printout Measured Resistance Equivalent Resistance at Reference Temperature ...

Page 28: ...WRM 10P S2 USER S MANUAL REV 1 0 24 Figure 8 Typical V1 and V2 Test Report Printout with Multiple Readings ...

Page 29: ... The WRM then instructs the user to change to the next tap position and repeat the testing process Follow steps below to perform an LTC Voltage Regulator Test a Start from the START UP menu Press the 1 key RUN TEST b The following screen will be displayed Press the 1 key V1 V2 TEST if you would like to perform a V1 V2 test Press the 2 key V1 ONLY TEST if you would like to perform a V1 test only Fo...

Page 30: ... be displayed Select the number of NEUTRAL taps by pressing the corresponding key For this example we well select ONE by pressing the 1 key f The following screen will be displayed If the tap information is correct press the 1 key YES and continue to step g If the tap information is incorrect press the 2 key NO and return to step d 3 LOWER 1N 3 RAISE IS THIS CORRECT 1 YES 2 NO NUMBER OF NEUT TAPS ...

Page 31: ... Press the 3 key MANUALLY ENTER Tk to manually enter the Tk value The following screen will be displayed 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 h 2 NO Press the 2 key NO if you do NOT wish to convert readings to standard temper...

Page 32: ...mperature Press the ENTER key to confirm the reference temperature setting NOTE The WRM will calculate the equivalent resistance value at this new temperature Please see section 4 2 for further information about how this value is calculated j The following screen will be displayed Press any key to continue WARNING DANGEROUS FLASH OVER WILL OCCUR IF CABLES ARE DISCONNECTED REFERENCE TEMP 75 0 C 167...

Page 33: ...nishes its internal calibration the following screen will be displayed m The WRM determines when the resistance reading is stable and displays the resistance value on the LCD screen as shown below Press the ENTER key to accept and save the readings for the current tap TEST IN PROGRESS 24 I 9 972 Amps R1 997 4 mΩ Δ 0 XFMR ENERGIZED XFMR CHARGING PLEASE WAIT I 9 972 Amps CALIBRATING PLEASE WAIT SET ...

Page 34: ...owing screen will be displayed after the last Raise position s resistance reading is stored Press the 1 key YES to print the test results on the unit s built in thermal printer A typical LTC voltage regulator test report printout is shown in Figure 9 p The following screen will be displayed Press the 1 key YES to save the test record q The following screen will be displayed Press any key to return...

Page 35: ...REV 1 0 WRM 10P S2 USER S MANUAL 31 Figure 9 Typical LTC Voltage Regulator Test Report Printout ...

Page 36: ...ould like to perform a V1 and V2 Special Test Press the 4 key SPECIAL TEST V1 if you would like to perform a V1 only Special Test For this example we will press the 3 key to perform a Special V1 V2 Test c The following screen will be displayed Select the special test interval by pressing the corresponding key on the keypad For this example press the 3 key to select 20 seconds Resistance data will ...

Page 37: ...ou 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 f Press the 2 key ALUMINUM Tk 225 to select aluminum as the winding material Continue to step f Press the 3 key MANUALLY ENTER Tk to manually enter the Tk value The following screen will be displayed WINDING MATERIAL 1 ...

Page 38: ...dard temperature Continue to step h f The following screen will be displayed Use the and keys to adjust the D U T Device Under Test temperature Press the ENTER key to confirm the D U T temperature setting g The following screen will be displayed Use the and keys to adjust the reference temperature Press the ENTER key to confirm the reference temperature setting REFERENCE TEMP 75 0 C 167 0 F to Adj...

Page 39: ...e START key to run the test j The following screen will be displayed momentarily After the WRM finishes its internal calibration the following screen will be displayed 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 XFMR CHARGING PLEASE WAIT CALIBRATING PLEASE WAIT V1 V2 TEST...

Page 40: ...nue to measure the resistance and when the selected time interval has passed it will record the resistance value The following screen will be displayed informing the user that a data point has been saved The WRM will continue to measure the resistance and record the data points at each pre defined interval until the total test time has elapsed REMAINING TIME 00 58 TEST 2 SAVED I 9 867 Amps R1 1 00...

Page 41: ...ed a long test time and a short data recording interval the printout will be very long Press the 2 key NO if you do not want to print the test record p The following screen will be displayed Press the 1 key YES to save the test record q The following screen will be displayed Press any key to return to the START UP menu SHOT NUMBER 005 HAS BEEN SAVED SAVE THIS RECORD 1 YES 2 NO PRINT RECORD 1 YES 2...

Page 42: ...WRM 10P S2 USER S MANUAL REV 1 0 38 Figure 10 Typical Special Test Report Printout 1 minute 10 second intervals ...

Page 43: ...ngs thus causing irreparable damage By connecting the WRM continuity test input across the switching input and running the regulator switch through all the contacts in its range any breaks in continuity caused by faulty tap switching can be detected Please note that the transient test is applicable for the V1 channel only Follow the steps below to perform a Transient Test a Start from the START UP...

Page 44: ...ny changes to the test parameters Continue to step d 2 EDIT SETTINGS Press the 2 key EDIT SETTINGS if you would like to change the test parameters The following screen will be displayed Press the or key to increase or decrease the time interval by 1 mSec increments respectively Press the ENTER key The following screen will be displayed Press the or key to increment or decrement the threshold level...

Page 45: ... depends on the size of the winding s inductance g The test begins as the magnetic field in the transformer ramps up to a stable plateau The following screen will be displayed when the transformer current stabilizes Manually run the regulator switch through all the contacts in its range Press the STOP key to end the test TRANSIENT TEST Interval 5 mSecs Threshold 2 RUN TAPS NOW XFMR ENERGIZED XFMR ...

Page 46: ...The following screen will be displayed Press the 1 key YES to print the test results The test results will be printed and you will be returned to the START UP menu A typical voltage regulator test report is shown in Figure 11 Press the 2 key NO if you do not want to print the test results You will be returned to the START UP menu PRINT TEST RESULTS 1 YES 2 NO TRANSIENT DETECTED NO TRANSIENT DETECT...

Page 47: ...REV 1 0 WRM 10P S2 USER S MANUAL 43 Figure 11 Typical Transient Test Report ...

Page 48: ... Follow the steps below to perform a diagnostic test a Start from the START UP menu Press the 3 key DIAGNOSTICS b The following warning screen will be displayed Press any key to continue c The following screen will be displayed Press the START key d The following screen will be displayed USER DIAG TEST I V1 V2 XFMR ENERGIZED USER DIAG TEST START TO RUN TEST OR STOP TO ABORT WARNING DANGEROUS FLASH...

Page 49: ...MANUAL 45 Once the readings have stabilized they will be displayed on the screen as shown below Press the STOP key to end the test and return to the START UP menu USER DIAG TEST I 10 068 Amps V1 10 1 mV V2 10 1 mV XFMR ENERGIZED ...

Page 50: ...it can be reviewed or printed a Start from the START UP menu Press the 2 key TEST RECORDS b The following screen will be displayed NOTE Option 7 COPY TO THUMB DRIVE will be displayed only if a USB Flash drive is inserted in the WRM 10P S2 s USB Flash drive port Press the 4 key RESTORE RECORD 1 PRINT RECORD 2 DISPLAY RECORD 3 SAVE RECORD 4 RESTORE RECORD 5 RECORD DIRECTORY 6 ERASE RECORD 7 COPY TO ...

Page 51: ...The following screen will be displayed Continue with the steps below 1 ENTER REC NUMBER If you know the record number that you would like to restore press the 1 key The following screen will be displayed Type the record number using the keypad and then press the ENTER key Continue to step d RESTORE SHOT NUM _ RESTORE RECORD 1 ENTER REC NUMBER 2 SCROLL TO SELECT RESTORE RECORD 1 ENTER REC NUMBER 2 ...

Page 52: ...ve located the test record you would like to restore and then press then ENTER key Continue to step d d The following screen will be displayed 1 DISPLAY TEST DATA Press the 1 key DISPLAY TEST DATA to view the restored test record s data on the unit s LCD screen The following screen will be displayed showing the test record s header data 09 20 17 15 18 NUMBER OF TESTS 3 V1 V2 TEST CMP STA CKT MFR S...

Page 53: ...s you can continue to press the or key to view the next reading Press the STOP key when done and you will be returned to the START UP menu 2 PRINT TEST DATA Press the 2 key PRINT TEST DATA to print the restored test record s data on the unit s built in thermal printer The test record will be printed and you will be returned to the START UP menu TEST NUMBER 01 R1 1 000 mΩ R1s 1 192 mΩ R1 1 000 mΩ R...

Page 54: ...T UP menu Press the 2 key TEST RECORDS b The following screen will be displayed Press the 4 key RESTORE RECORD c The following screen will be displayed Press the 2 key THUMB DRIVE d The following screen will be displayed Type the record number using the keypad and then press the ENTER key RESTORE THUMB DRIVE REC_ _ 1 INTERNAL STORAGE 2 THUMB DRIVE 1 PRINT RECORD 2 DISPLAY RECORD 3 SAVE RECORD 4 RE...

Page 55: ...1 key YES to print the restored test record s data on the unit s built in thermal printer The data will be printed and you will be returned to the START UP menu 2 NO Press the 2 key NO if you do not want to print the restored test record s data You will be returned to the START UP menu To view or print the restored test record s data please see section 3 11 3 and 3 11 4 respectively REC_001 RESTOR...

Page 56: ...a Start from the START UP menu Press the 2 key TEST RECORDS b The following screen will be displayed NOTE Option 7 COPY TO THUMB DRIVE will be displayed only if a USB Flash drive is inserted in the WRM 10P S2 s USB Flash drive port Press the 2 key DISPLAY RECORD c The following screen will be displayed showing the test record s header data 09 20 17 15 18 NUMBER OF TESTS 3 V1 V2 TEST CMP STA CKT MF...

Page 57: ...respectively The results will be displayed as shown below If the test record contains additional readings you can continue to press the or key to view the next reading Press the STOP key when done and you will be returned to the START UP menu TEST NUMBER 01 R1 1 000 mΩ R1s 1 192 mΩ R1 1 000 mΩ R1s 1 193 mΩ ...

Page 58: ...oring a test record you can do so later by following the steps below a Start from the START UP menu Press the 2 key TEST RECORDS b The following screen will be displayed Press the 1 key PRINT RECORD The test record in the working memory will be printed on the unit s built in thermal printer and you will be returned to the START UP menu 1 PRINT RECORD 2 DISPLAY RECORD 3 SAVE RECORD 4 RESTORE RECORD...

Page 59: ... If you would like to save the test record to a USB Flash drive please insert the USB Flash drive in the unit s USB MEM port Press the 2 key TEST RECORDS b The following screen will be displayed Press the 3 key SAVE RECORD If a USB Flash drive is inserted in the USB MEM port continue to step c If a USB Flash drive is NOT inserted in the USB MEM port the following screen will be displayed Press any...

Page 60: ...The following screen will be displayed Press any key to return to the START UP menu 2 SAVE TO THUMB DRIVE Press the 2 key SAVE TO THUMB DRIVE to save the test record from the unit s working memory to the connected USB Flash Drive The following screen will be displayed Press any key to return to the START UP menu REC_003 SAVED TO THUMB DRIVE SHOT NUMBER 003 HAS BEEN SAVED 1 SAVE INTERNALLY 2 SAVE T...

Page 61: ...owing screen will be displayed Press the 7 key COPY TO THUMB DRIVE c The following screen will be displayed 1 COPY SINGLE RECORD Press the 1 key COPY SINGLE RECORD if you would like to copy a single test record to the USB Flash drive The following screen will be displayed ENTER RECORD NUMBER TO COPY TO THUMB DRV NUMBER _ COPY REC TO THUMB DRV 1 COPY SINGLE RECORD 2 COPY ALL RECORDS 1 PRINT RECORD ...

Page 62: ... following confirmation screen will be displayed Press any key to return to the START UP menu 2 COPY ALL RECORDS Press the 2 key COPY ALL RECORDS if you would like to copy all test records to the USB Flash drive All test records from the unit s internal memory will be copied to the USB Flash drive and you will be returned to the START UP menu when the process is finished REC_004 SAVED TO THUMB DRI...

Page 63: ...he following screen will be displayed NOTE The above screen will be displayed only if a USB Flash drive is NOT connected to the WRM s USB Flash drive port If a USB Flash drive is connected the following screen will be displayed Press the 1 key INTERNAL DIRECTORY The following screen will be displayed PRINT DIRECTORY 1 FULL DIRECTORY 2 SHORT DIRECTORY 1 INTERNAL DIRECTORY 2 THUMB DRIVE DIR 1 PRINT ...

Page 64: ...e printed on the thermal printer and you will be returned to the START UP menu A sample directory listing printout is shown in Figure 12 2 SHORT DIRECTORY Press the 2 key SHORT DIRECTORY to print a directory of the last 10 records stored in the WRM s internal memory The short directory listing will be printed on the thermal printer and you will be returned to the START UP menu PRINT DIRECTORY 1 FU...

Page 65: ...REV 1 0 WRM 10P S2 USER S MANUAL 61 Figure 12 Typical Internal Test Record Directory Printout ...

Page 66: ... the 2 key TEST RECORDS b The following screen will be displayed Press the 5 key RECORD DIRECTORY c The following screen will be displayed Press the 2 key THUMB DRIVE DIR The directory listing will be printed on the thermal printer and you will be returned to the START UP menu A sample directory listing printout is shown in Figure 13 1 INTERNAL DIRECTORY 2 THUMB DRIVE DIR 1 PRINT RECORD 2 DISPLAY ...

Page 67: ...REV 1 0 WRM 10P S2 USER S MANUAL 63 Figure 13 Typical USB Flash Drive Test Record Directory Printout ...

Page 68: ...screen will be displayed NOTE The above screen will be displayed only if a USB Flash drive is NOT connected to the WRM s USB Flash drive port If a USB Flash drive is connected the following screen will be displayed Press the 1 key ERASE INTERNAL REC The following screen will be displayed 1 ERASE INTERNAL REC 2 ERASE THUMB DRV REC ERASE RECORD 1 ERASE SINGLE RECORD 2 ERASE ALL RECORDS 1 PRINT RECOR...

Page 69: ...ss If you do not know the record number you can first print a test record directory using the instructions in section 3 11 7 The test record will be erased and the following confirmation screen will be displayed Press any key to return to the START UP menu 2 ERASE ALL RECORDS Press the 2 key ERASE ALL RECORDS if you would like to erase all the test records from the unit s internal memory The follo...

Page 70: ...that are erased CANNOT be recovered Press the ENTER key to continue with the erasure process All test records will be deleted from the unit s internal memory and the following screen will be displayed Press any key to return to the START UP menu RECORDS ERASED ERASE ALL RECORDS Are you SURE ENTER TO CONTINUE ...

Page 71: ... records in the WRM s USB MEM port and then start from the START UP menu Press the 2 key TEST RECORDS b The following screen will be displayed Press the 6 key ERASE RECORD c The following screen will be displayed Press the 2 key ERASE THUMB DRV REC 1 ERASE INTERNAL REC 2 ERASE THUMB DRV REC 1 PRINT RECORD 2 DISPLAY RECORD 3 SAVE RECORD 4 RESTORE RECORD 5 RECORD DIRECTORY 6 ERASE RECORD 7 COPY TO T...

Page 72: ... cancel the process If you do not know the record number you can first print a test record directory using the instructions in section 3 11 8 The test record will be erased and the following confirmation screen will be displayed Press any key to return to the START UP menu 2 ERASE ALL RECORDS Press the 2 key ERASE ALL RECORDS if you would like to erase all of the test records from the USB Flash dr...

Page 73: ...t are erased CANNOT be recovered Press the ENTER key to continue with the erasure process All test records will be deleted from the connected USB Flash drive and the following screen will be displayed Press any key to return to the START UP menu ALL SHOTS ERASED ERASE ALL RECORDS Are you SURE ENTER TO CONTINUE ...

Page 74: ...lity of early erroneous readings Depending on the transformer size the delay may be shorter or longer than 3 minutes The operator can bypass this delay and observe the test results immediately To bypass this delay Start at the START UP menu Press the numbers 9 8 and 7 in sequence The following screen will be displayed momentarily You will then be returned to the START UP menu Once the Quick Displa...

Page 75: ...ivalent 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 resistance Ts is the desired reference temperature Tm is the temperature at which the resistance was measured Tk is the winding material constant Tk 234 5 for copper Tk 240 0 for aluminum ...

Page 76: ... cable connection Opened transformer windings Check current cable connection Perform a quick test using a shunt or a piece of aluminum bar Resistance reading is zero or invalid while current value is displayed on the LCD screen Opened sense leads connection Sense leads problem Check sense leads connection to D U T Check sense leads using an ohmmeter Perform a diagnostic test See section 3 10 ...

Page 77: ...Hellman Ave Ontario CA 91761 USA Phone 909 923 9390 Fax 909 923 9391 www vanguard instruments com Copyright 2017 by Vanguard Instruments a Doble Company WRM 10P S2 User s Manual Revision 1 0 October 5 2017 TA ...

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