Microtest 8751 User Manual Download

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3.1.5.1 Meter Mode - Conduction

This function allows performing of conduction test.

pin+: connected pin + selection.

pin-: connected pin - selection.

OFFS: Compensation value setting.

The LCD screen will display as follows:

3.1.5.2 Meter Mode - Component

This function allows performing of component (R: resistance L: inductance C: capacitance D: diode)

measurement.

FUNC: Selects component type (R: resistance L: inductance C: capacitance D: diode).

pin+: connected pin + selection.

pin-: connected pin - selection.

OFFS: Compensation value setting.

D-Para: Test current setting (1-20mA).

The LCD screen will display as follows:

Summary of Contents for 8751

Page 1: ...8751 8761 4 Wire Universal Cable Harness Tester User Manual Version 1 00 Issued Date May 2017...

Page 2: ...s Used in this Manual 5 2 3 Operating Basics 6 2 4 Front and Rear Panel Displays 7 2 4 1 Front Panel 7 2 4 2 Rear Panel 9 2 5 Block Diagram of Tester Functions 11 2 6 Installation 12 2 7 Button Usage...

Page 3: ...Resistance 54 4 1 4 High Voltage Setting Edit HV 58 4 2 Comprehensive Test Implementation 62 4 2 1 Real Time Test 62 4 2 2 Existed Test 62 4 3 File Management 63 4 3 1 Select File 63 4 3 2 Step Settin...

Page 4: ...njury or death 1 2 Avoid Self Modification or Calibration Never install surrogate parts onto the machine or undertake any device modifications and internal calibrations yourself without the express pe...

Page 5: ...during Test Process Please turn the device off at the power source if it will not be used for a long period of time 1 9 Location and Storage The device may be operated normally in temperatures of 18...

Page 6: ...nector 3 pin to 2 pin 1 x user manual 2 2 Description of Nouns and Symbols Used in this Manual xxxx This represents the name of buttons on the tester for example TEST Sy xxxx This represents the butto...

Page 7: ...numbers and the 2nd 4th time will be the capital English letter from the left to the right on top of the number buttons respectively examples are as follows Button name Number of times pressed LCD dis...

Page 8: ...ry buttons Soft Key 3 PASS FAIL HIPOT LED 4 Control button Edit Key group 5 Test shortcut button group 6 System reset Reset button 7 Power switch 8 Pin Search connector 9 128Pin has 2 slots and 256 Pi...

Page 9: ...4 Control button Edit Key group 5 Test shortcut button group 6 System reset Reset button 7 Power switch 8 Pin Search connector 9 256Pin has 8 slots 10 Test button TEST 11 System button Sys Key group 1...

Page 10: ...t 4 High voltage calibration output connector 5 AC power input 230 115 VAC 6 115 230V switch 7 Fuse holder 250V 3A 8 Audio output socket Note 1 Please confirm whether the AC input voltage setting is t...

Page 11: ...t 3 Printer Port 4 AC power input 230 115 VAC 5 115 230V switch 6 Fuse holder 250V 3A 7 Audio output socket Note 1 Please confirm whether the AC input voltage setting is the same as the voltage used 2...

Page 12: ...Function setting Conduction setting Test Yes No Setup Mode System setting DC insulation setting Test AC tolerance setting Yes No Stat Statistical data R setting Test Yes No Print Print setting C setti...

Page 13: ...execute the self test program 4 When the execution of the self test is completed it will officially enter the 8751 8761 system the LCD display will be as follows 5 To end the system please press the P...

Page 14: ...l S5 Software version and update date display S6 Switch between Chinese English 1 Quickly switches to the short circuit table function same as O S 2 Quickly switches to the learning function same as L...

Page 15: ...tion AC tolerance setting edit 3 Control button Edit Key group Alphanumeric buttons Used to enter alphanumeric characters including 0 1 A Z and BS Back Space Direction buttons Used to move the cursor...

Page 16: ...ion Print descriptions are as follows 3 1 Function Menu Provides the main function menu for the system its operations and function descriptions are as follows 1 Press Func 2 The LCD screen will displa...

Page 17: ...r this machine will execute the self test function immediately upon powering on 1 Press Func please use or to select system self test and then press Enter 2 The system will now execute the self test f...

Page 18: ...t can perform system update 1 Press Func please use or to select RAM configuration table and then press Enter 2 The LCD screen will display as follows 3 1 3 Test Parameter Calibration This function in...

Page 19: ...igh voltage calibration is used to adjust the Read test value closest to the DC setting value 1 Press Func 2 Please use or to select test parameter calibration and then select DC high voltage calibrat...

Page 20: ...ease use or to select test parameter calibration then select AC high voltage calibration and press Enter 3 The LCD screen will display as follows 4 Press S1 UP or S2 DOWN to adjust the Read test value...

Page 21: ...t the internal resistance of PORT B slot B If the machine you purchased is 256PIN it will offset the internal resistance all the way to PORT H in sequence 6 Change the offset board to the COND offset...

Page 22: ...S4 OK 6 To cancel the set data simply press S6 QUIT 3 1 4 Pin Search This function can display which is the current output pin 1 Press Func 2 Please use or to select pin search and then press Enter 3...

Page 23: ...ecting of Conductance R L C D Insulation Withstanding and use the meter mode to perform continuous tests 1 Press Func 2 Please use or to select meter mode and then press Enter 3 Select the test item C...

Page 24: ...display as follows 3 1 5 2 Meter Mode Component This function allows performing of component R resistance L inductance C capacitance D diode measurement FUNC Selects component type R resistance L ind...

Page 25: ...ON and the H V signal on the panel turns on which means that high voltage is being sent to the straight boxed output terminal and the high voltage calibration terminal During this time there is the da...

Page 26: ...N and the H V signal on the panel turns on which means that high voltage is being sent to the straight boxed output terminal and the high voltage calibration terminal During this time there is the dan...

Page 27: ...connection Protocol Select TCPC or TCPS Sever IP Server IP address Sever port Server port Host Address Host address Host mask Host mask Host gateway Host gateway gateway Command delay cmd delay Sets t...

Page 28: ...configuration and test related action settings their operation and function descriptions are as follows 1 Press Sys 2 The LCD screen will display as follows 3 Please use or to select the item needed...

Page 29: ...y Sets the input power frequency 50Hz 60Hz 3 Key Stroke Sound This tester allows enabling disabling button sounds according to the needs The default value is All Key All Key Sets it so that there are...

Page 30: ...cted so please read the user manual carefully 1 Press Sys and use or to select this item function 2 Press S1 or PROG 3 The LCD screen will display as follows 5 Sound Volume Press S1 or PROG to adjust...

Page 31: ...30 3 2 2 Setting the Testing Environment 1 The LCD screen will display as follows...

Page 32: ...Data This function is used to set the display of the test statistical data and print format there are a total of three options ALL Display and print test data whether there are errors or not None Do...

Page 33: ...Generates a test result file on the USB flash drive Computer connection Transmits the test result to the computer terminal through the RS232 interface 14 Connect Det Tests the step files one by one a...

Page 34: ...y R offset delay time setting 3000us 60000us Default is 3000us 24 AF Delay Time Frame current output delay time setting 1ms 1000ms Default is 5ms 25 Default Setting All options of the test environment...

Page 35: ...en input is complete 5 Press Exit to exit Note 1 Hour is in 24 hour format 3 2 4 Change System Password This tester provides key lock protection in order to prevent data from being modified randomly 1...

Page 36: ...repeat the setting steps described above 3 3 Print Function Menu This tester provides direct printer output making it easy for you to print out the data needed its operation and function descriptions...

Page 37: ...as follows 3 Press add network add the network 001 short circuit pin A01 and the LCD screen will display as follows 4 Press add pin and use the other function button slot A and the number button 02 to...

Page 38: ...arrange network and then the exit button to complete network editing the LCD screen will display as follows 7 When check failed resulting in the network cannot be arranged and the network editing proc...

Page 39: ...anagement for details 3 6 Statistical Data Statistic This function allows viewing of the test result statistical data including total number of tests number of passes number of fails and cause of fail...

Page 40: ...tical data using percentages 4 The LCD screen will display as follows 5 Press S6 CLR to clear all current statistical data 6 Press Exit to exit when completed 3 7 Mode Setting Mode Press O S and then...

Page 41: ...reshold Available options include 2K 5K 10K 20K and 50K other functions are used to determine the short circuit value If it is set as 2K cables with resistance under 2K are considered to be short circ...

Page 42: ...open circuit or short circuit 4 Unilateral test sensitivity SINGLE SIDE SENDS The lower the value the more sensitive it is 0 999 5 Instant short circuit test time INTER O S Time 0 60s 6 Instant short...

Page 43: ...est press TEST and the LCD screen will display as follows From the LCD display screen we can find out the total number of tests and the number of passes and fails 2 When test mode is being set set the...

Page 44: ...as follows Use the automatic pin search probe to specify the short circuit pin to test example is as follows When using the pin search probe on the panel touch the relative position A01 specified by t...

Page 45: ...he cables A03 A05 A07 and also press S1 READ press S4 Finish when completed When performing cable test press TEST and the LCD screen will display as follows Please use the automatic pin search probe a...

Page 46: ...initially have 4 steps preset so for the test of each test DUT steps 1 to 4 of the step test must be completed successfully in order for it to pass A maximum of 128 test steps can be set When test mod...

Page 47: ...sed and the value will change to zero after learning S4 clears the unilateral offset value Press Learn after inserting the test DUT the LCD screen will display as follows When test mode is being set e...

Page 48: ...ve stable tests 4 Test start method Automatic Starts test after test DUT is inserted Manual Starts test after the test DUT is inserted and the Test button is pressed Continuous Continuous tests after...

Page 49: ...display for the A Port or B Port short circuit 9 Unilateral test sensitivity This acts when the cable type is set as unilateral it is considered short circuit when the test value is higher than the va...

Page 50: ...e test DUT according to the pin learned a maximum of 4 tests can be selected and the start and end pins of the test DUT can be set P S There must be no other test DUT at the start and end of the test...

Page 51: ...whether to execute test for the selected item Chapter 4 Comprehensive Test Mode Test mode uses programmed design functions to perform simultaneous and automatic tests according to the different test c...

Page 52: ...luding O S Cond R C HIPOT Diode settings its contents mainly includes The test signals frequency voltage size and current etc of each test item Parameter Control standard specification control standar...

Page 53: ...ding to your needs as the lower limit of the cable conductance 3 Conductance offset Cond Offset Resistance value can be entered to increase or decrease the resistance of the fixture 4 Conductance mode...

Page 54: ...53 Press S3 Cond Net to enter conduction edit Press S1 SET the item needed and then press S4 OK Import to component edit...

Page 55: ...istance value of the test DUT s NET for offset fixture 4 1 3 R C D Component Setting Edit Resistance 1 Press the R C D button and the screen will display as follows 2 After entering the name move the...

Page 56: ...ard value line enter the actual test value or use S1 Learn and S2 Learn all function the LCD screen will display as follows 5 When the component is resistance or capacitance press S5 CLR OFFS to offse...

Page 57: ...nce or capacitance offset 8 When the component is resistance press SHIFT S5 CLR OFFS to display the data for resistance offset the LCD screen will display as follows 9 When the component is diode or c...

Page 58: ...nter the pin selected Pin negative pin Negative pin setting please enter the pin selected Standard value Standard value setting please enter the value needed Error Error value setting please enter the...

Page 59: ...the test voltage value for DC insulation and AC tolerance the DC voltage is 50V 1000V N NA 50V 1500V FA and the AC voltage is 100V 700V NA 100 1000 FA 2 Frequency Sets the test frequency only the AC p...

Page 60: ...testing and the second time A B E F and C D G H are divided into two groups for testing and the third time A C E G and B D F H are divided into two groups for testing then the test only needs to be pe...

Page 61: ...hod that finds a balance between stable test value and test speed Quick Test method that saves changing time under known test specification conditions The following requirements must be followed for q...

Page 62: ...nly used to test tests with no circuits 4 DC arc Sensitivity Sets the DC arc detection sensitivity 1 8 the lower the value the more sensitive it is the higher the value the less sensitive it is 5 AC a...

Page 63: ...firm whether the test mode settings are correct and change according to your needs 4 After confirming there are no errors press EXIT to exit and return to the main screen 5 Press TEST to start testing...

Page 64: ...You can execute select old file delete old file file sorting actions to make it easier to manage and use the files instructions are as follows 4 3 1 Select File Select file loads files saved on the pe...

Page 65: ...at this time 4 3 2 Step Setting When you need to perform multiple test steps to a test DUT you can set the test steps that need to be performed using step test to simplify your test process and reduce...

Page 66: ...e files EX1 EX2 and EX3 6 Use or to move the cursor to EX1 and then press S3 SET 7 The LCD screen will display as follows And then use or to move the cursor to EX2 and then press S3 SET 8 The LCD scre...

Page 67: ...ish and the LCD screen will display as follows 12 This way step test setting is complete S2 LEARN can also be used for setting 13 For example Put the test DUT in place and press S2 LEARN the LCD scree...

Page 68: ...tep setting will be generated the LCD screen will display as follows 15 And so on we can set the 1st 2nd step Assume we have set a total of 5 test steps once setting is completed press S3 OK and the L...

Page 69: ...68 16 This also completes the setting for step test 17 Press S3 STEP TEST or TEST and the LCD screen will display as follows 18 Performs the 1st test step the LCD screen will display as follows...

Page 70: ...ep test Note 1 When each test step is completed the machine will scan for short circuits O S The machine will only perform the next test step after the short circuit O S status changes 2 If you want t...

Page 71: ...5 Confirm the file name you want to create and press Enter to complete the create new file action 4 3 4 Upload File Upload file uploads the selected single file to the USB flash drive its instruction...

Page 72: ...ctions are as follows 1 Press File 2 Press S4 UP ALL to execute the upload all files action 3 The LCD screen will display as follows 4 3 6 Delete File Delete file permanently deletes files saved on th...

Page 73: ...lows 4 Confirm the file name you want to delete and press Enter to complete the delete file action 4 3 7 File Sorting File sorting sorts the files according to four rules its instructions are as follo...

Page 74: ...73 2 Press S6 SORT to execute the file sort action 3 File order after sorting...

Page 75: ...he import file screen 2 Press S1 PROG or S4 SELALL to select the file to import on the other hand you can press S5 CANC EALL to cancel the selected files 3 Press S1 SET STEP to import the file current...

Page 76: ...75...

Page 77: ...n Parity Character ASCII Character Function 8751 8761 Controller RxD Pin2 Pin3 TxD Pin3 Pin2 GND Pin5 Pin5 2 PRINTER CABLE 25 PIN connector male 36 PIN connector male Signal 1 1 STROBE 2 2 DATA 0 3 3...

Page 78: ...ircuit means Reset same as pressing RESET on the panel EGND and equipment GND Uses insulation isolation design for connection with different zero level potential equipment CTL 7 0 Open collector outpu...

Page 79: ...t CTL1 High voltage testing CTL2 Total PASS status CTL3 Total FAIL CTL4 DUT 1 FAIL status CTL5 DUT 2 FAIL status CTL6 DUT 3 FAIL status CTL7 DUT 4 FAIL status 5D and 12D output current must not exceed...

Page 80: ...0 1 50 0 1 Insulation resistance IS 1M 1 99M 10 50V IS 2 00 M 4 99 M 10 50V IS 5 00 M 9 99 M 10 50V IS 10 00 M 19 99 M 10 50V IS 20 00 M 49 99 M 10 50V IS 50 00 M 99 99 M 10 100V IS 100 0 M 199 9 M 10...

Page 81: ...VAC 8751 8761 NA 50 1000VDC 100 700VAC 8751 8761 NAC 50 1000VDC 100 700VAC 8751 8761 N 50 1000VDC 50V Resolution High voltage output accuracy 5 accuracy Display sound device 320x240 resolution graphic...

Page 82: ...tting file system update Memory device Built in 2048KB SRAM A maximum of 250 sets of test setting files can be saved Built in CR2032 battery Power supply 115 230 Vac switchable voltage input 10 60 50H...

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