Biddle PAT4-Quickstart 电路图.pdf

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1、 PAT4 Quick-Start Guide. Terminology. Megger Limited, the PAT4 and all its associated software use a common verbal language in descriptions and instructions in an attempt to avoid confusion. Hopefully it is all logical and makes sense, so here are a few terms and their explanations. Further details

2、can be found within the User Guide on the pages indicated. Asset 22 Portable electrical appliance under test Asset ID 22 Unique identifier for each asset. 2 clients can use the same Asset IDs, but all Asset IDs within one client must be unique. Client 14 Organisation for whom the testing is being pe

3、rformed Continuity Test 37 Low-Resistance test performed at low current (0.2A) to establish integrity of Earth connection on equipment that could be damaged by the high current Bond test; such as computers. Sometimes referred to as a Soft Test. Download 34 Transfer of data from the PAT4 to the PC Ea

4、rth Bond Test 37 Low-Resistance test performed at high current (10A or 25A) to establish integrity of Earth connection Insulation Test 38 High Resistance test performed at high voltage (500V) to establish integrity of the insulation material Location 17 Branch, Building or Department in which the as

5、set is located Quick-Check 30 Any test performed on an asset which is not stored to memory Repair Code 28 User-designated 3-character codes to identify any work that was or will be necessary to enable the asset to pass. Room ID 22 Secondary identifier for asset location Test Group 19 therefore, if t

6、he metalwork is also at that voltage level (Earthed), no danger exists. Secondary protection will also come in to play here, as when a fault occurs there will be current flowing from Live to Earth via the fault. This will cause any Earth Leakage Trip on the supply to operate, so cutting the power an

7、d removing the danger. RadioFans.CN 收音机爱 好者资料库 PAT4 Quick-Start Guide. So the primary method of protection here is the fact that you cant touch any live parts, but equally important is that any exposed metalwork is properly Earthed. Further to this, if there is a slight (high resistance) fault betwe

8、en Live or Neutral and Earth, the likelihood is that the fault will develop into something worse, possibly causing a fire or electrocution. The PAT4 DV will prompt or test for all of these dangers. Visual inspection. Does it look OK? The most important part of any test and the one that shows up the

9、most failures is the Visual Inspection. If the asset is obviously dangerous, it should not be plugged in until it has been repaired. In fact, if the asset fails any test, it should be unplugged immediately and no further testing should take place until it is repaired. It is also important that all t

10、ests are performed in the recommended sequence such that faults are identified at the earliest opportunity. Is the case damaged? Is the plug OK? The lead? The main power switch? Is the supply socket OK? Should there be a problem, all of these questions are asked by the PAT4 to act as an aide-memoir

11、while checking, and give the opportunity to log any faults or areas of concern. In addition, it also asks other application type questions such as is the equipment suitable for the task to which it is being put? Is the environment OK i.e. is the equipment designed to be used indoors, when it is actu

12、ally being used outside in the rain? Electrical testing. This is only intended as a get-you-going-guide, and it is essential that all safety warnings in the front of the User Guide be read first. Similarly, further explanations on all sections here can also be found within the User Guide. Test Crite

13、ria As with any of the specifics around Portable Appliance Testing, the actual test currents and voltages used, and the pass/fail levels for each test are ultimately the decision of the PAT4 Operator (or his Employer), following guidance from the IEE Code of Practice for In-Service Inspection and Te

14、sting of Electrical Equipment. The PAT4 has the ability to store those criteria into memory, such that all equipment of a similar type can be tested to the same levels. When entering asset details, a Test Group is chosen and associated with that piece of equipment. Earthing 37 The integrity of the E

15、arth connection is checked using different test currents depending on the type of equipment under test and its fuse rating. This should produce a low value, measured in Ohms. Some equipment that uses Switch Mode Power Supplies (typically Personal Computers etc) could become damaged by the high curre

16、nts used during the standard Earth Bond Test, so a low current test at about 0.2A is allowed. This is a Continuity Test, sometimes referred to as a Soft Test. In order to perform a Bond test, both ends of the circuit must be accessible and connected. Taking the trusty steam iron, one end is the Eart

17、h pin on the mains plug, the other is the sole plate. The whole point of this test is to ensure that they are both electrically bonded together. So, the connection for the Earth pin is through the socket on the front panel of the PAT, where it plugs in. The sole plate will require an additional test

18、 lead to complete the test path back to the PAT4. This is the Earth Bond Test Lead, and connects to a terminal on the PAT4. When testing Extension Leads, the far-end connection is made through the IEC-Socket on the front of the PAT4. Short adaptors are available to connect other types of lead to tha

19、t socket. RadioFans.CN 收音机爱 好者资料库 PAT4 Quick-Start Guide. Insulation 38 Any faulty connection between Live (or Neutral) and Earth is more likely to show when tested using a high test-voltage as the insulation material is more highly stressed. Therefore the Insulation Test is performed at 500V d.c. F

20、or those assets which are not Earthed (Class 2, Double-Insulated) there is no Earth point to perform the Insulation Test between. Therefore, an additional test lead is required to connect to any exposed metal on the asset. The same lead and terminal as used during the Bond Test is used here, probing

21、 on to assembly screws or other metalwork present. Like the high currents used in Earth Bond, the high d.c. voltage used in this test may damage some assets such as computers. Because of this, the Insulation Test may be replaced with an Earth or Touch Leakage Test performed during the Operation Test

22、. Operation 38 The asset should never be run at operating voltage if any of the previous tests have indicated a failure. During the operation test, various measurements are taken including the VA (Volts x Amps) rating to check the power drawn from the supply, and a Touch-Leakage Test. This compares

23、the current in to the asset against the current out through the Neutral line, and any imbalance is reported as Earth Leakage. Flash (PAT4 DVF only) 40 It is not recommended that Flash Tests be routinely performed on assets. The Flash Test deliberately over-stresses the Insulation Materials to encour

24、age breakdown of any weak-points in the assembly, using 1.5kV (Class 1) and 3kV (Class 2) a.c. voltages. Over-stressing the insulation will cause premature ageing, so routine testing will cause the asset to fail much earlier in its life than would normally be expected. The facility is there to enabl

25、e initial testing and safety verification following a rebuild of the asset or re- design for any reason. RadioFans.CN 收音机爱 好者资料库 PAT4 Quick-Start Guide. Key pad operation Getting started. TESTSQUICK-CHECK COMMS MENU Multi-function soft- keys Perform the functions indicated in the display, including

26、scrolling when up and down arrows appear Escape or Delete key, and multi- function soft-key Select key when option displayed, or Backspace key while typing, Escape key when not OK Key, and multi-function soft-key Enter key, or Select key when option shown While typing, SPACE = (SHIFT+0) simultaneous

27、ly HV Energise key for Flash Test Some Screen/Key options NEXT may appear in the top-left hand corner of the display. This provides the facility to scroll through other items in memory similar to that displayed i.e. lists of Client names, Asset IDs, Test Groups etc. MORE may appear in the top right-

28、hand corner of the display. This provides a further three options of ERASE, EDIT or ADD, performed on the item previously shown Initial Power-Up If, at any time for any reason, you wish to reset the instrument back to the default settings and reinstate the original sample data as it was first unpack

29、ed, a Factory Reset can be performed. Reset to defaults Confirm (Y/N) Press and hold the R key during power- up Confirm Re-Set by pressing Y This is useful for resetting the instrument following initial familiarisation and training sessions, and is the state in which the following guide assumes the

30、PAT4 to be. PAT4 Quick-Start Guide. Logging on. On initial Power Up, following various internal checks and calibration settings, the PAT4 will ask for a User Name and a PIN number. All tests are Date, Time and User stamped for traceability. Once entered, the User remains logged in (even through Powe

31、r-Down) until specifically logged out. This speeds boot-up time when testing and relocating the PAT4 to a different room/department. 1. Under USER, type AVO (be sure to use O and not 0) 2. press OK 3. Under PIN, type 1234 4. press OK (Details of adding or deleting Users can be found on page 8 of the

32、 User Guide). User AVO PIN * Clients and Locations The PAT4 will not permit testing until a CLIENT and LOCATION have been selected for association with the asset. For our purposes, we will use sample clients and locations already within memory, however new ones are easily added. Client SELECT LOGOUT

33、5. Under Client press SELECT NEXT Client MORE AVO INTERNATIONAL 6. press OK Location SELECT LOGOUT 7. Under Location press SELECT 8. press OK Under each of these sections, pressing MORE will lead to further options, including deleting the selected CLIENT or LOCATION, or adding new ones with full add

34、resses. NEXT Location MORE MANUFACTURING SITE The instrument now shows the main screen from where all functions can be accessed . TESTS QUICK-CHECK COMMS MENU The Instrument is now ready to test an asset. PAT4 Quick-Start Guide. Menu navigation. All functions are accessible from the main screen. The

35、 following diagram will assist in navigation through the various screen menus available from each option Reference should additionally be made to the full User Guide at the pages indicated. Note: TESTS QUICK-CHECK COMMS MENU ADD 22 Add Asset then Test SEARCH 25 Search for an Asset by DATE, LOCATION

36、or GROUP, then Test SELECT 27 Select and Test an Asset by ID QUICK-CHECK 30 Enter Asset ID then select an individual test to perform without saving result to memory SEND 34 Download Data to PC RECEIVE 35 Upload Data from PC Note: - deletes all existing data ASSET 22 Management of Assets GROUPS 19 Ad

37、d/Erase/Edit Test Groups including tests performed and Pass/Fail criteria ASSETS 23 Add/Erase/Edit Assets CLIENT 14 Management of Clients SELECT 15 Change the current Client and Location, or Add/Erase/Edit Clients and Locations LOGOUT 7 User Log Out SETTINGS 6 PAT4 Settings USERS 8 CLOCK 11 MISC Fur

38、ther Settings REPORTS 32 Printing Options TEST SETUP 9 Settings for TEST TIMES, MANUAL or AUTOPASS, and Fail BUZZER operation COMPANY 12 Your own company name MEMORY 31 Memory Erase by GROUP, CLIENTS, LOCATIONS, ASSET, just RESULTS, SETUP settings; or ALL ACCEPT 15 Accept current Client and Location

39、 as that shown Pressing the ESC key a number of times will ultimately return the PAT4 to the Main Screen this is useful during the early User familiarisation stages. The exception here is when the PAT4 is awaiting information input. In which case simply accept the prompt with the OK key, and then re

40、turn to the Main Screen using the ESC key. PAT4 Quick-Start Guide. Testing an asset. Here we will test a Steam Iron, Class 1 insulation (Earthed). 1. Perform a visual inspection of the Asset. 2. Provided the Visual Inspection is all OK, plug the asset in to the front of the PAT4 3. press TESTS 4. pr

41、ess ADD 5. Under Asset ID, type 1, and press OK 6. Under Group type SC1 This is for Standard Class 1 assets. If the asset being tested is not earthed (i.e. Class2), type SC2, and the Earth Bond test will not be performed. LISTGroup SC1? 7. Under Short cut to tests press TEST Pressing CONTINUE will e

42、nable completion of additional optional asset information such as Serial No, Description, Room ID, Retest Frequency, VA Rating and Fuse Rating. 8. Earth Bond Test Connect the Earth Bond Lead. The PAT4 will ask for confirmation that the Asset is plugged in and that the Earth Bond lead is connected (d

43、ont forget both ends!) PAT4 Quick-Start Guide. 9. Confirm Pass or Fail as required. Note Asterisk next to the recommended option. Additional options are provided to re- test or log this result choose LOG 10A Bond Lead SKIP Connected? YES Bond Resistance FAIL =0.094 *PASS 10. Further options are prov

44、ided for additional Bond Tests where there are several separate sections of exposed metalwork on a single asset. If there are none, choose SKIP 11. Disconnect the Earth Bond Lead (Required for insulation testing of Class 2 Assets) 12. Insulation Test The Asset is pre-tested. If an open or short-circ

45、uit is apparent between Live and Neutral the PAT4 will indicate a problem and require operator intervention to proceed. Ensure Asset is switched ON. Asset may be O/C FAIL RETRY IGNORE Insulation Res. FAIL 50 M *PASS 13. Confirm PASS for Insulation Test 14. Operation Test The PAT4 will ask for confir

46、mation that while operating the Asset will be safe for example an electric chain saw will need to be held properly while it is running. Asset will run SAFE? 15. The VA Rating and Touch Leakage will require PASS confirmation Touch/ leakage FAIL 0.0mA *PASS 16. A PASS/FAIL statement will be briefly di

47、splayed, followed by the option to enter a Repair Code. If no repair was or will be required, proceed by pressing OK Repair code ? This is the conclusion of the test Its that easy! PAT4 Quick-Start Guide. B Barcode Scannerarcode Scanner. . If required, to speed testing, a Barcode Scanner can be conn

48、ected to the PAT4 for scanning Asset ID, Asset Serial Number, Asset Description, Test Group. The Scanner simply connects to the RS232 port on the front panel of the PAT4 no setting up is required. Once the scanner is connected, at the screen-prompt where data would normally be typed in, simply scan the barcode. The data is read and automatically entered into the PAT4. This saves considerable amount time while testing, avoiding manually typing in information. PAT4 Quick-Start Guide. B Barcode Printerarcode Printer. . What it does information print