Associated Research 4500D Operation & Service 电路图.pdf

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1、 i OPERATION AND SERVICE MANUAL Hypot II MODEL 4500D 500 VA Enhanced AC Only Hipot With Ground Continuity Check SERIAL NUMBER Model 4500D Associated Research, Inc. 2002 13860 West Laurel Drive Lake Forest, Illinois 60045-4546 U.S.A. Item 38088 Ver 1.08 Printed Feb. 11, 2003 RadioFans.CN 收音机爱 好者资料库 i

2、i 5 YEAR WARRANTY POLICY Associated Research, Inc., certifies that the instrument listed in this manual meets or exceeds published manufacturing specifications. This instrument was calibrated using standards that are traceable to the National Institute of Standards and Technology (NIST). Your new in

3、strument is warranted to be free from defects in workmanship and material for a period of (1) year from date of shipment. Options and accessories that are external to the instrument are warranted for a period of (90) days from date of shipment. You must return the “Owners Registration Card” provided

4、 within (15) days from receipt of your instrument. AR recommends that your instrument be calibrated on a twelve month cycle. Instruments purchased and used in North America only, may have their warranty extended in one year increments to a maximum of (5) years provided they are returned to AR at lea

5、st annually for calibration and inspection. The annual calibration and inspection must be performed annually every year following receipt of instrument. Any instrument not calibrated and inspected annually will not be eligible for extended warranty status. This extended warranty is non-transferable

6、and is offered only to the original purchaser. A return material authorization (RMA) must be obtained from AR before returning this instrument for warranty service. Please contact our Customer Support Center at 1-800-858-TEST (8378) to obtain an RMA number. It is important that the instrument is pac

7、ked in its original container for safe transport. If the original container in not available please contact our customer support center for proper instructions on packaging. Damages sustained as a result of improper packaging will not be honored. Transportation costs for the return of the instrument

8、 for warranty service must be prepaid by the customer. AR will assume the return freight costs when returning the instrument to the customer. The return method will be at the discretion of Associated Research. Except as provided herein, Associated Research makes no warranties to the purchaser of thi

9、s instrument and all other warranties, express or implied (including, without limitation, merchantability or fitness for a particular purpose) are hereby excluded, disclaimed and waived. Any non-authorized modifications, tampering or physical damage will void your warranty. Elimination of any connec

10、tions in the earth grounding system or by-passing any safety systems will void this warranty. This warranty does not cover batteries or accessories not of Associated Research manufacture. Parts used must be parts that are recommended by AR as an acceptable specified part. Use of non-authorized parts

11、 in the repair of this instrument will void the warranty. RadioFans.CN 收音机爱 好者资料库 iii TABLE OF CONTENTS SECTION I OPERATORS MANUAL. 1 SAFETY. 2 INTRODUCTION. 7 SPECIFICATIONS . 13 CONTROLS. 17 INSTALLATION. 20 QUICKSTART. 23 OPERATION. 26 OPTIONS . 36 SECTION II SERVICE MANUAL. 39 CALIBRATION. 40 PA

12、RTS LIST. 42 SCHEMATICS. 43 RadioFans.CN 收音机爱 好者资料库 SECTION 1 OPERATORS MANUAL SAFETY 2 SAFETY PRECAUTIONS REQUIRED FOR HIGH VOLTAGE TESTING! GENERAL: This product and its related documentation must be reviewed for familiarization with safety markings and instructions before operation. This product

13、is a Safety Class I instrument (provided with a protective earth terminal). Before applying power verify that the instrument is set to the correct line voltage (115 or 230) and the correct fuse is installed. INSTRUCTION MANUAL SYMBOL. PLEASE REFER TO THE INSTRUCTION MANUAL FOR SPECIFIC WARNING OR CA

14、UTION INFORMATION TO AVOID PERSONAL INJURY OR DAMAGE TO THE PRODUCT. INDICATES HAZARDOUS VOLTAGES MAY BE PRESENT CHASSIS GROUND SYMBOL. CALLS ATTENTION TO A PROCEDURE, PRACTICE, OR CONDITION, THAT COULD POSSIBLY CAUSE BODILY INJURY OR DEATH. CALLS ATTENTION TO A PROCEDURE, PRACTICE, OR CONDITION, TH

15、AT COULD POSSIBLY CAUSE DAMAGE TO EQUIPMENT OR PERMANENT LOSS OF DATA. WARNING CAUTION SAFETY 3 A Hipot produces voltages and currents that can cause harmful or fatal electric shock. To prevent accidental injury or death, these safety procedures must be strictly observed when handling and using the

16、test instrument. SERVICE AND MAINTENANCE User Service To prevent electric shock do not remove the instrument cover. There are no user serviceable parts inside. Routine maintenance or cleaning of internal parts is not necessary. Avoid the use of cleaning agents, chemicals, or liquids to clean the cab

17、inet of the instrument. Some chemicals are corrosive and may damage the finish of the instrument or may damage plastic parts or lettering. Any external cleaning should be done with a clean dry or slightly damp cloth. Application or spillage of liquid on the instrument may penetrate the cabinet throu

18、gh the ventilation holes or damage the controls and/or switches. Schematics, when provided, are for reference only. Any replacement cables and high voltage components should be acquired directly from Associated Research, Inc. Refer servicing to an Associated Research, Inc. authorized service center.

19、 ASSOCIATED RESEARCH, INC. 13860 WEST LAUREL DRIVE LAKE FOREST, IL 60045-4546 U.S.A. !PHONE: 1 (847) 367-4077 1 (800) 858-TEST (8378) FAX: 1 (847) 367-4080 E-MAIL : Service Interval The instrument and its power cord, test leads, and accessories must be returned at least once a year to an Associated

20、Research authorized service center for calibration and inspection of safety related components. Associated Research will not be held liable for injuries suffered if the instrument is not returned for its annual safety check and maintained properly. User Modifications Unauthorized user modifications

21、will void your warranty. Associated Research will not be responsible for any injuries sustained due to unauthorized equipment modifications or use of parts not specified by Associated Research. Instruments returned to Associated Research with unsafe modifications will be returned to their original o

22、perating condition at your expense. TEST STATION Location Select an area away from the main stream of activity which employees do not walk through in performing their normal duties. If this is not practical because of production line flow, then the area should be roped off and marked for HIGH VOLTAG

23、E TESTING. No employees other than the test operators should be allowed inside. SAFETY 4 If benches are placed back-to-back, be especially careful about the use of the bench opposite the test station. Signs should be posted: “DANGER HIGH VOLTAGE TEST IN PROGRESS UNAUTHORIZED PERSONNEL KEEP AWAY.” Po

24、wer Dielectric Voltage-Withstand Test Equipment must be connected to a good ground. Be certain that the power wiring to the test bench is properly polarized and that the proper low resistance bonding to ground is in place. Power to the test station should be arranged so that it can be shut off by on

25、e prominently marked switch located at the entrance to the test area. In the event of an emergency, anyone can cut off the power before entering the test area to offer assistance. Work Area Perform the tests on a nonconducting table or workbench, if possible. There should not be any metal in the wor

26、k area between the operator and the location where products being tested will be positioned. Position the tester so the operator does not have to reach over the product under test to activate or adjust the tester. If the product or component being tested is small, it may be possible to construct gua

27、rds or an enclosure around the device to be tested. Construct the guards of a non-conducting material such as clear acrylic, so that the item being tested is within the guards or enclosure during the test. If possible, the guards or enclosure should also contain safety switches that will not allow t

28、he tester to operate unless the guards are in place or the enclosure closed. Keep the area clean and uncluttered. All test equipment and test leads not absolutely necessary for the test should be removed from the test bench and put away. It should be clear to both the operator and to any observers w

29、hich product is being tested, and which ones are waiting to be tested or have already been tested. Do not perform Hipot tests in a combustible atmosphere or in any area where combustible materials are present. TEST OPERATOR QUALIFICATIONS This instrument generates voltages and currents that can caus

30、e harmful or fatal electric shock and must only be operated by a skilled worker trained in its use. The operator should understand the electrical fundamentals of voltage, current, and resistance. Safety Procedures Operators should be thoroughly trained to follow these and all other applicable safety

31、 rules and procedures before they begin a test. Defeating any safety system should be treated as a serious offense and should result in severe penalties, such as removal from SAFETY 5 the Hipot testing job. Allowing unauthorized personnel in the area during a test should also be dealt with as a seri

32、ous offense. Dress Operators should not wear jewelry, which could accidentally complete a circuit. Medical Restrictions This instrument should not be operated by personnel with heart ailments or devices such as pacemakers. TEST PROCEDURES !NEVER PERFORM A HIPOT TEST ON ENERGIZED CIRCUITRY OR EQUIPME

33、NT! If the instrument has an external safety ground connection be sure that this is connected. Always connect the return lead first, regardless of whether the item under test is a sample of insulating material, a component tested with the high voltage test lead, or a cord- connected device with a tw

34、o or three prong plug. The return lead should be connected first for any type of hipot testing. Plug in the high voltage test lead only when it is being used. Handle its clip only by the insulator-never touch the clip directly. Be certain that the operator has control over any remote test switches c

35、onnected to the Hipot. Double-check the return and high voltage connections to be certain that they are proper and secure. NEVER TOUCH THE ITEM UNDER TEST OR ANYTHING CONNECTED TO IT WHILE HIGH VOLTAGE IS PRESENT DURING THE HIPOT TEST. When testing with DC, always discharge the capacitance of the it

36、em under test and anything the high voltage may have contactedsuch as test fixturesbefore handling it or disconnecting the test leads. HOT STICK probes can be used to discharge any capacitance in the item under test as a further safety precaution. A hot stick is a nonconducting rod about two feet lo

37、ng with a metal probe at the end that is connected to a wire. To discharge the device under test, two hot sticks are required. First, connect both probe wires to a good earth ground. Then touch one probe tip to the same place that the return lead was connected. While holding the first probe in place

38、, touch the second probe tip to the same place where the high voltage lead was connected. WARNING SAFETY 6 KEY SAFETY POINTS TO REMEMBER: Keep unqualified and unauthorized personnel away from the test area. Arrange the test station in a safe and orderly manner. Never touch the product or connections

39、 during a test. In case of any problem, turn off the high voltage first. Properly discharge any item tested with DC before touching connections. INTRODUCTION 7 GLOSSARY OF TERMS (as used in this manual) Alternating Current, AC: Current which reverses direction on a regular basis, commonly in the U.S

40、.A. 60 times per second, in other countries 50 times per second. Breakdown: The failure of insulation to effectively prevent the flow of current, sometimes evident by arcing. If voltage is gradually raised, breakdown will begin suddenly at a certain voltage level. Current flow is not directly propor

41、tional to voltage. Once breakdown current has flown, especially for a period of time, a repeated application of voltage will often show breakdown beginning at a lower voltage than initially. Conductive: Having a volume resistivity of no more than 103 ohm-cm or a surface resistivity of no more than 1

42、05 ohms per square. Conductor: A solid or liquid material which has the ability to let current pass through it, and which has a volume resistivity of no more than 103 ohm-cm. Current: The movement of electrons through a conductor. Current is measured in amperes, milliamperes, microamperes, nanoamper

43、es, or picoamperes. Symbol = I Dielectric: An insulating material which is positioned between two conductive materials in such a way that a charge or voltage may appear across the two conductive materials. Direct Current, DC: Current which flows in one direction only. The source of direct current is

44、 said to be polarized and has one terminal which is always at a higher potential than the other. Hipot Tester: Common term for dielectric-withstand test equipment. Hypot: Registered trademark of Associated Research, Inc., for its dielectric-withstand test equipment. Insulation: Gas, liquid or solid

45、material which has a volume resistivity of at least 1012 ohm-cm and is used for the purpose of resisting current flow between conductors. Insulation Resistance Tester: An instrument or a function of an instrument capable of measuring resistances in excess of 200 megohms. Usually employs a higher voltage power supply than used in ohmmeters measuring up to 200 megohms. Leakage: AC or DC current flow through insulation and over its surfaces, and AC current flow through a capacitance. Current flow is directly proportional to voltage. The insulation an