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Summary of Contents for Microtest 7700
- Page 1 IMPULSE / SURGE TESTER 7700 / 7710 / 7720 User Manual Issue B May 2006 Part Nº 9H7700...
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Page 2: Table Of Contents
1.2 AC Power Supply ......................1–5 1.3 Adjustment, Maintenance and Repair ................1–5 1.4 Static Electricity ......................1–6 INTRODUCTION ......................2-1 2.1 Package and Accessories....................2-1 2.1.1 7700 ........................2-1 2.1.2 7710 ........................2-1 2.1.3 7720 ........................2-1 INSTALLATION ......................3-1 3.1 AC Line Connections ....................3-1 3.2 Location ........................ - Page 3 1–2 4.7.6 Sorting ......................... 4-11 4.7.7 View Mode ......................4-12 TESTING A NEW COMPONENT ................5-1 5.1 Create a New Test Program File ................... 5-1 5.2 Test Voltage ........................5-1 5.2.1 Example of Establishing the Test Voltage ............5-1 5.3 Test Mode Menu ......................5-1 5.3.1 Test Mode ......................
- Page 4 1–3 10.6 Waveform Resolution ....................10–1 10.7 Display/Audio ......................10–2 10.8 Interface ........................10–2 10.9 Memory ........................10–2 10.10 Power Supply ......................10–2 10.11 Accessories ......................10–2 10.12 Thermo/Humility ....................10–2 10.13 Size .........................10–2 10.14 Weight ........................10–2 10.15 Options ........................10–3 11. MAINTENANCE, SUPPORT AND SERVICES ............11-1 11.1 Guarantee ........................
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Page 5: Safety
Do not use the equipment if it is damaged. In such circumstances the equipment must be made inoperative and secured against any unintentional operation. MICROTEST ELECTRONICS and the associated sales organizations accept no responsibility for personal or material damage, or for any consequential damage that... -
Page 6: Ac Power Supply
1–5 1.2 AC Power Supply Power cable and connector requirements vary between countries. Always use a cable that conforms to local regulations, terminated in an IEC320 connector at the instrument end. If it is necessary to fit a suitable AC power plug to the power cable, the user must observe the following colour codes: WIRE EUROPEAN... -
Page 7: Static Electricity
1–6 Capacitors inside the equipment may still be charged even if the equipment has been disconnected from all voltage sources. Any adjustment, maintenance, or repair of the opened equipment under voltage must be carried out by a skilled person who is aware of the hazards involved. Service personnel should be trained against unexpected hazards. -
Page 8: Introduction
2. Introduction The 7700 series of Winding Testers provide a non-destructive way to test windings using a high voltage pulse of between 500V and 10kV. By comparing the decay waveforms with a standard winding, deviation in core material, number of turns, shorted turns, and insulation breakdown can be identified. -
Page 9: Installation
3. Installation 3.1 AC Line Connections The unit is provided with a power cable capable of carrying the input current for both 115V and 230V operation. This cable should be connected via a suitable connector to the local AC power supply. -
Page 10: Safety Interlock
DO NOT USE THIS EQUIPMENT IF IT IS DAMAGED. For maximum user safety, it recommended that a safety interlock is used. 3.4 Safety Interlock WARNING! HIGH VOLTAGE This product is capable of having hazardous voltages (up to 10kV) on its terminals in normal use. -
Page 11: Operation
4. Operation WARNING! This equipment is intended for use by suitably trained and competent persons. This product is capable of having hazardous voltages (up to 10kV) on its terminals in normal use. Appropriate precautions should be taken for safety. This product can cause hazards if it is not used in accordance with these instructions. Read them carefully and follow them in all respects. -
Page 12: The Rear Panel
Power on/off switch (10) 2 terminals high voltage testing connector 4.2 The Rear Panel (4) (5) Figure 4-2 Rear Panel Serial Port (RS-232 Port) Remote Control Port (Handler Port) Printer Connection Port (Printer Port) AC Input (230/115 VAC) AC Input 115 or 230V Selection Switch Note Before connecting to the AC power source ensure that the selector switch (5) is set to the correct voltage. -
Page 13: Product Identification
4.3 Product Identification A self testing program is executed when the instrument is initially switched on. At the end of the self test the instrument displays the product identification graphic. Figure 4-3 7720 Product Identification 4.3.1 Ready State At the ready state the soft keys have the following capabilities: Brighten LCD backlight Dim LCD backlight System Information... -
Page 14: Enter
The self-test will now run and display the test results. Figure 4-5 shows the SELF–TEST result screen with all tests passed. Press the SKIP soft key to disable any test. If the unit fails any stage of the self-test please contact Microtest. -
Page 15: Sys. Info
2 key. The system information will now be displayed on the screen and includes file space available, software and hardware versions. Some of this information may be requested if Microtest is contacted for assistance with the unit. -
Page 16: System
Figure 4-7 System Set-up Menu 4.6.1 SYSTEM To display the SYSTEM SETUP sub-menu press Enter when the SYSTEM option is highlighted. Use the navigation keys to select the required option or press the alphanumeric 1 key. Figure 4-8 System Set-up Sub-Menu TESTER ID No. - Page 17 1) Move the highlight to the KEY LOCK option with the navigation keys. 2) Press either of the navigation keys, or the PROG soft key: the CHECK PASSWORD box, shown below, will be displayed. 3) Enter the correct password, then press Enter. The key lock will now be set to the opposite state.
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Page 18: Graphics
4.6.2 GRAPHICS To display the GRAPHICS SETUP menu press Enter when the GRAPHICS option is highlighted. Use the navigation keys to select the required option or press the alphanumeric 2 key. Figure 4-11 Graphics Set-Up Menu STANDARD WAVE The STANDARD WAVE can be shown on the test screen in either a line or dot format, or can be turned off. -
Page 19: Date Time
The CENTRE LINE and GRID, shown in the TEST display, can be turned ON or OFF as follows: 1) Move the highlight to the required option with the navigation keys. 2) Press either the navigation keys, or the PROG soft key to change the setting. 4.6.3 DATE TIME To display the SET TIME menu press Enter when the DATE TIME option is highlighted (use navigation keys to select the required option), or press the alphanumeric 3 key. -
Page 20: Test Programs
4-10 2) Enter the new password and then press the front panel Enter key. 3) Re-enter the new password again and press the front panel Enter key. 4.7 Test Programs Each component to be tested requires a test file to be created which includes the test parameter settings and the learnt waveform from a known good working ‘golden’... -
Page 21: Edit An Existing Test Program
4-11 Figure 4-15 Creating a New File The unit is now ready for the standard waveform to be learnt and the Test Parameters to be entered. See Chapter 5 for more information. 4.7.4 Edit an Existing Test Program Enables modification of existing test program parameters or to learn a known good working ‘golden’... -
Page 22: View Mode
4-12 4.7.7 View Mode The date and time file information may be displayed or hidden using the VIEW MODE soft key. Figure 4-17 View Mode... -
Page 23: Testing A New Component
5. Testing a New Component To test a new component a standard waveform has to be learnt for each test step from a known good ‘golden’ sample and then the optimum test parameter settings established by testing a quantity, of golden sample components. The test parameters define the expected variation of component characteristics. -
Page 24: Dummy Pulse
5.3.2 Dummy Pulse The Dummy Pulse facility pre-magnetises a component and may be useful where a residual magnetic field is present prior to applying the test pulse. 5.3.3 Testing Pulse The alphanumeric keypad is used to set the number of Pulses generated when testing a component. -
Page 25: Selecting The Test Parameters
5.5 Selecting the Test Parameters Figure 5-1 7700 / 7710 2 Port Test Parameter Menu Figure 5-2 7720 8 Port Test Parameter Menu Press the front panel Para key: the TEST PARAMETER menu will be displayed. For each step highlight the individual test parameters required to be measured using the navigation keys. -
Page 26: Waveform Area Size Setup
Establishing the optimum parameter settings will involve testing a quantity of ‘golden’ samples and adjusting the tolerance levels as required. Use the Para key or the EDIT soft key from the FILE menu. 5.6.1 Waveform Area Size Setup The WAVEFORM AREA SIZE test looks for a change in the area under the waveform but does not take into account any distortion or movement of the waveform. -
Page 27: Flutter Value Setup
Pressing the PRE–TEST soft key with a component connected to the unit’s test connectors will show the component characteristics superimposed on the standard waveform to allow an instant comparison. Adjustments can then be made to the DIFFERENTIAL AREA SIZE set-up if required. -
Page 28: Waveform Comparison Setup
Figure 5-5 Flutter Value 5.6.4 Waveform Comparison Setup WAVEFORM COMPARISON looks for a change in the waveform voltage or frequency. With the WAVEFORM COMPARISON test turned ON and selected with the cursor, press the SET–UP soft key: the WAVEFORM COMPARISON set-up display (Figure 5-6) will be shown. -
Page 29: Optimizing The Test Parameter Settings
5.6.5 Optimizing the Test Parameter Settings To optimize the parameter settings a quantity of known good working golden samples will be required. It is recommended that at least five samples are used during optimization. Test each sample and note the test differences compared to the learnt waveform. Example Test Parameter Values The final Test Parameter settings used are dependant on component design and manufacturing quality. -
Page 30: Component Testing
6. Component Testing WARNING! HIGH VOLTAGE This product is capable of having hazardous voltages (up to 10kV) on its terminals in normal use. Appropriate safety precautions should be taken. A high voltage pulse, or pulses, is applied during testing. The front panel High Voltage (H.V.) LED will light whenever a high voltage pulse is applied to the component under test. -
Page 31: Test Statistics
6.1 Test Statistics Pressing the STAT soft key or the front panel Stat key will show the test statistics of the currently loaded file. An example is shown below. Figure 6-2 Test Statistics Press the QTY. RATE soft key to toggle between absolute and percentage statistics. To clear the data press the CLR soft key. -
Page 32: Remote Control
7. Remote Control 7.1 Serial Port 7.1.1 Protocol Baud rate: 9600bps Character length: 8bits Stop bit: 1bit Parity: Non-parity Character: ASCII character 7.1.2 Serial Port Connections Function 7220 Controller Pin 2 Pin 3 Pin 3 Pin 2 Pin 5 Pin 5 Pin 7 Pin 8 Pin 8... -
Page 33: Commands
+12V GROUND 7.1.4 Commands Commands are terminated by LF (line feed, ASCII code 10 (decimal), 0xA (hexadecimal); only the LF is effective as the terminator. Download (D) D – reference file is sent from the computer to 7720 4608 bytes in length 4, 6 or 8 port instruments 512 bytes in length 2 port instruments The command ‘D’... - Page 34 System Key (Kn) Kn - simulates the pressing of a specified front-panel key. User must make sure the 7720 is in the desired state before executing this command and essential delay time generated to ensure the key command is executed without loss of information prior to sending a further command. Where n = 1 Number key 1 Number key 2...
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Page 35: Handler Port
Test Step Number (S?) Returns the number of the step that is currently being edited. Trigger (T) Trigger the 7720 and query the test result with waveform data returned. Trigger (t) Trigger the 7720 and query the test result without waveform data being returned. 7.2 Handler Port 7.2.1 Pin Assignment A test is performed whenever IPC∅... -
Page 36: Port Timing
RESET System is reset whenever RESET and GND are shorted. 5V DC output for user applications +12V same as pin 9 Ground CTRL0 – CTRL3 are photo-coupled, they are grounded when active, floating when inactive. 7.2.2 Port Timing 1. Trigger signal duration greater than 10mS. 2. -
Page 37: Theory Of Operation
8. Theory of Operation 8.1 Applied Pulse When a short high voltage pulse is applied to a perfect unloaded inductor a sine wave would be seen that continued to infinity without changing amplitude. However, the perfect inductor does not exist and making a measurement will always apply a small load to the device under test. - Page 38 Figure 8-2 Corona Discharge...
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Page 39: High Voltage Calibration & Test
If the following procedure is not carried out correctly the output voltage may be set incorrectly, which could cause incorrect reading and/or damage to the device under test. Consult Microtest, before calibration, if the unit is suspected of being faulty. 9.1 High Voltage Calibration To calibrate each output range voltage levels, select the FUNCTION menu using the Func key. -
Page 40: High Voltage Test
9.2 High Voltage Test To check the output voltage at each available voltage step, select the FUNCTION menu using the Func key. Select the high voltage test by pressing Enter when the H/V TEST option is highlighted. Use the navigation keys to select the required option or press the alphanumeric 4 key. -
Page 41: Specification
10–1 10. Specification 10.1 Measurement Ports Two – 7700/7710 Eight – 7720 10.2 Advanced Functions 5000V testing voltage (7700/7720) 10000V testing voltage (7710) Auto Learning / Auto Testing Test Result Statistics and Analysis System Self Diagnostic Password Management 10.3 Testing Functions... -
Page 42: Display/Audio
10.9 Memory Flash Memory Store up to 100 sets of Wave Information 10.10 Power Supply 115/230 Vac Switchable ±10% 60/50Hz 10.11 Accessories 2 connection cables (7700/7710) 8 connection cables (7720) Remote Connection Cable Power Cord User’s Manual 10.12 Thermo/Humility C ~ 40 RH≦75%... -
Page 43: Options
10–3 10.15 Options Stores 200 sets of Waveforms Stores 400 sets of Waveforms... -
Page 44: Maintenance, Support And Services
11-1 11. Maintenance, Support and Services 11.1 Guarantee The equipment supplied by is guaranteed against defective material and faulty manufacture for a period of twelve months from the date of dispatch. In the case of materials or components employed in the equipment but not manufactured by us, we allow the customer the period of any guarantee extended to us. -
Page 45: Support And Service
14F-6, No.79, Hsin Tai Wu Road, Sec. 1, Hsi-chih, Taipei 221, Taiwan, R.O.C. Tel: +886-2-2698-3877 Fax: +886-2-2698-4089 Email: sales@microtest.com.tw When returning the instrument please ensure adequate care is taken with packing and arrange insurance cover against transit damage or loss. If possible re-use the original packing box.
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