BIRD 6730B Series Termaline Wattmeter (1997) WW 电路图.pdf

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1、INSTRUCTION BOOK OPERATING INSTRUCTIONS SERIES 6730B TERMALINE WATTMETER Copyright 1997 by Bird Electronic Corporation Instruction Book Part Number 920-6730B Rev. B Termalineis a Registered Trademark of Bird Electronic Corporation Electronic Corporation Cleveland (Solon) Ohio USA RadioFans.CN 收音机爱 好

2、者资料库 Limited Warranty All products manufactured by Seller are warranted to be free from defects in material and workmanship for a period of one (1) year, unless otherwise spec- ified, from date of shipment and to conform to applicable specifications, draw- ings, blueprints and/or samples. Sellers so

3、le obligation under these warranties shall be to issue credit, repair or replace any item or part thereof which is proved to be other than as warranted; no allowance shall be made for any labor charges of Buyer for replacement of parts, adjustment or repairs, or any other work, unless such charges a

4、re authorized in advance by Seller. If Sellers products are claimed to be defective in material or workmanship or not to conform to specifications, drawings, blueprints and/or samples, Seller shall, upon prompt notice thereof, either examine the products where they are located or issue shipping inst

5、ructions for return to Seller (transporta- tion-charges prepaid by Buyer). In the event any of our products are proved to be other than as warranted, transportation costs (cheapest way) to and from Sellers plant, will be borne by Seller and reimbursement or credit will be made for amounts so expende

6、d by Buyer. Every such claim for breach of these warranties shall be deemed to be waived by Buyer unless made in writing within ten (10) days from the date of discovery of the defect. The above warranties shall not extend to any products or parts thereof which have been subjected to any misuse or ne

7、glect, damaged by accident, rendered defective by reason of improper installation or by the performance of repairs or alterations outside of our plant, and shall not apply to any goods or parts thereof furnished by Buyer or acquired from others at Buyers request and/or to Buyers specifications. In a

8、ddition, Sellers warranties do not extend to the failure of tubes, transistors, fuses and batteries, or to other equipment and parts manufactured by others except to the extent of the original manufac- turers warranty to Seller. The obligations under the foregoing warranties are limited to the preci

9、se terms thereof. These warranties provide exclusive remedies, expressly in lieu of all other remedies including claims for special or consequential damages. SELLER NEITHER MAKES NOR ASSUMES ANY OTHER WARRANTY WHATSOEVER, WHETHER EXPRESS, STATUTORY, OR IMPLIED, IN- CLUDING WARRANTIES OF MERCHANTABIL

10、ITY AND FITNESS, AND NO PERSON IS AUTHORIZED TO ASSUME FOR SELLER ANY OBLIGA- TION OR LIABILITY NOT STRICTLY IN ACCORDANCE WITH THE FOREGOING. RadioFans.CN 收音机爱 好者资料库 SAFETY PRECAUTIONS The following are general safety precautions that are not necessarily related to any specific part or procedure an

11、d do not necessarily appear elsewhere in this publication. These precautions must be thoroughly understood and apply to all phases of operation and maintenance. KEEP AWAY FROM LIVE CIRCUITS Operating personnel must at all times observe normal safety regulations. Do not replace components or make adj

12、ustments to the inside of the test equip- ment with the high voltage supply turned on. To avoid casualties, always dis- connect power. DO NOT SERVICE OR ADJUST ALONE Operating personnel must at all times observe normal safety regulations. Do not attempt to replace parts or disconnect a RF transmissi

13、on or any other high voltage line while power is applied. When working with high voltage al- ways have someone present who is capable of rendering aid if necessary. Per- sonnel working with or near high voltage should be familiar with modern methods of resuscitation. SAFETY EARTH GROUND An uninterru

14、ptible earth safety ground must be supplied from the main power source to test instruments. Grounding one conductor of a two conduc- tor power cable is not sufficient protection. Serious injury or death can occur if this grounding is not properly supplied. SHOCK HAZARD HIGH VOLTAGE is used in the op

15、eration of this equipment. DEATH ON CONTACT may result if personnel fail to observe safety precautions. Learn the areas containing high voltages in each part of the equipment. Be careful not to contact high voltage connections when installing or operating this equipment. CHEMICAL HAZARD Solvents use

16、d to clean parts are potentially dangerous. Avoid inhalation of fumes and also prolonged skin contact. i RadioFans.CN 收音机爱 好者资料库 RESUSCITATION Personnel working with or near high voltages should be familiar with modern methods of resuscitation. Such information may be obtained from the Bureau of Med

17、icine and Surgery. SAFETY SYMBOLS WARNING Warning notes call attention to a procedure, which if not correctly performed, could result in personal injury. Caution: Caution notes call attention to a procedure which, if not correctly performed, could result in damage to the instrument. 6730B WARNING ST

18、ATEMENTS The following safety warnings appear in the text where there is danger to op- erating and maintenance personnel and are repeated here for emphasis. WARNING Before applying RF power to the Models 6735-300A, 6736-030A or 6736A be sure to remove the shipping plug, P/N 2450-049 located near or

19、on top of the radiator. Replace the shipping plug with the supplied breather vent plug, P/N 2450-094. This is important as internal pressure build-up, caused by expansion of the heated dielectric coolant, could cause damage to the equipment and injury to the operator. WARNING When the unit is used i

20、n the upper range of its power capacity, the radiator will become hot - care should be used in touching the equipment. WARNING Do not attempt to operate the Termaline Wattmeter for prolonged periods at higher than rated load levels. Damage to the equipment and injury to the operator may result. WARN

21、ING Never attempt to disconnect any RF equipment from the transmission line while RF power is being applied. Leaking RF energy is a potential health hazard. ii 6730B CAUTION STATEMENTS The following equipment cautions appear in the text whenever the equipment is in danger of damage and are repeated

22、here for emphasis. CAUTION Model 6735-300A is rated for 1200 W operation for a maximum of hour only. For continuous operation, the maximum wattage should be restricted to 1000 W. It is recommended that if frequent use above 1000 W is contemplated, the instrument be equipped with the thermoswitch ass

23、embly. CAUTION Do not replace coolant with anything but the specified fluid. The inner shell of the resistor housing is contoured to the dielectric properties of this fluid. The use of any other type of coolant will affect the electrical performance of the load. iii About This Manual This instructio

24、n book covers the models 6732B, 6734B, 6734B-030, 6735-300A, 6736A, 6736-030A, 6737A, and 6737-030A Termaline Wattmeter. This instruction book is arranged so that essential information on safety is contained in the front of the book. Reading the Safety Precautions Section before operating the equipm

25、ent is strongly advised. The remainder of this Instruction Book is divided into Chapters and Sections. At the beginning of each chapter a general overview will be given, describing the contents of that chapter OPERATION First time operators should read Chapter 1 - Introduction, and Chapter 3 - Insta

26、llation, to get an overview of equipment capabilities and how to install it. An experienced operator can refer to Chapter 4 - Operating Instructions. All instructions necessary to operate the equipment, are contained in this section. MAINTENANCE All personnel should be familiar with preventative mai

27、ntenance found in Chapter 5 - Maintenance. If a failure should occur, the troubleshooting sec- tion will aid in isolating and repairing the failure. PARTS For location of major assemblies or parts refer to the part lists and associated drawings in Chapter 5. CHANGES TO THIS MANUAL We have made every

28、 effort to ensure this manual is accurate at the time of publication. If you should discover any errors or if you have suggestions for improving this manual, please send your comment to our factory. This manual may be periodically updated, when inquiring about updates to this manual refer to the par

29、t number and revision level on the title page. iv TABLE OF CONTENTS Safety Precautions .i Warning Statements .ii Caution Statements .iii About This Manual.iv Introduction .1 Purpose and Function.1 Dimensions and Weight.1 Power and Utility Requirements .1 Environmental Requirements .2 Items Furnished

30、.2 Optional Items.2 Items Required .2 Principles of Operation.5 Cooling.6 Installation.9 Mounting Rectangle .9 Installing the Vent Plug.9 Installing the Thermoswitch .10 Connecting the Thermoswitch.11 Operating Instructions.13 Controls.13 Start-Up.13 Normal Operation.13 v Operation Under Emergency,

31、Adverse, or Abnormal Conditions .14 Shutdown .14 Emergency Shutdown .14 Maintenance .15 Troubleshooting.15 Cleaning .16 Outside Surfaces .16 Radiator.16 Inspection .16 Preventive Maintenance .16 RF Assembly Test.16 Disassembly.17 RF Connector.17 Diaphragm and Coolant Oil.18 RF Load Resistor .19 Asse

32、mbly.21 RF Connector.21 Diaphragm and Coolant Oil.21 RF Load Resistor .22 Storage.22 Shipment.22 Load Portion.22 Meter Portion.22 Low Frequency Line Section .22 Customer Service .23 Replacement Parts List.24 vi Chapter 1 Introduction This instruction book is intended for use by operators of the Mode

33、ls 6732B, 6734B, 6734B030, 6735-300A, 6736A, 6736-030A, 6737A, and 6737-030A Termaline Wattmeter. This chapter contains introductory information including product specifications, items supplied, and accessory items available. Purpose and Function A Series 6730B Termaline Wattmeter is a portable dire

34、ct reading absorption wattmeter that both measures and dissipates RF power. It is a self-contained unit that re- quires no outside power source or additional equipment, except for the Models 6737A and 6737-030A which must have auxiliary water cooling. The load portion forms an accurate, dependable a

35、nd practically non-reflective 50 ohm termination for the adjustment, standby and testing of transmitters under nonradiating conditions. These Termaline Wattmeters can safely measure and ab- sorb their maximum rated RF power. The low frequency units will measure power to within 5 percent of full scal

36、e over the frequency band of 2 to 32 MHz. The rest of their frequency range permits power measurement to 10 percent of full scale. The high frequency units measure to 5 percent of full scale from 25 to 512 MHz and 10 per- cent of full scale from 512 to 1000 MHz. Each meter has three switch selectabl

37、e scales and is housed separately from the load. Dimensions and Weight The dimensions of the individual loads are given in the specifications on page 3. The meter housings are 5 9/16 inch W x 6 inch H x 4 11/64 inch D (141 x 165 x 106 mm) for the Model 6735, 6736, and 6737 series and 3 7/8 inch W x

38、5 5/8 inch H x 3 7/8 inch D (98 x 143 x 98 mm) for the Model 6732 and 6734 series. The total weight for each wattmeter is also given in the specifications. The shipping weights will run approxi- mately 20 percent higher. Power and Utility Require- ments The Series 6730B Termaline Wattmeters require

39、no exter- nal source of electrical power other than the RF input power for operation. The Models 6737A and 6737-030A do, however, depend on a supplemental water supply for cooling. 1 Environ- mental Require- ments These wattmeters should be operated in a dust and vibra- tion free environment. The am

40、bient temperature range should remain between -40C and +45C (-40F and +113F) for proper operation. Allow at least 6 inches (150 mm) of clearance around the units to permit unimpeded access of natural air convection currents for adequate heat dissipation. Items Furnished These models consist of a loa

41、d with a line section/voltme- ter assembly RF input. The meter assembly is connected to the voltmeter through a dc cable assembly. This in- struction book, part number 920-6730B is the only other item furnished with these models. Optional Items The models 6734B030, 6736-030A, and 6737-030A are equip

42、ped with a special low frequency line section P/N 6734-034. This line section can also be ordered as an op- tion to convert the models 6734B, 6736A, or 6737A to the low frequency (-030) version. Items Required A matching connector to the wattmeter is needed on the coaxial transmission line. Water co

43、oled Models 6737A and 6737-030A must also have a conveniently located water supply and a drain. Only simple tools such as screwdrivers will be necessary for disassembly of this equipment. A resistance bridge or ohmmeter with an accuracy of at least 1% at 50 ohms is useful for checking the resistance

44、 value of the RF sec- tion assembly. Bird Model 6730B Series Termaline Wattmeter 2 Specifications Impedance50 ohms nominal VSWR 6734B030, 6736-030A 6737-030A1.10:1.00 max. dc - 35MHz 6734B, 6736A, 6735-300A, 6737A1.15:1.00 max. dc - 1000MHz 6732B1.15:1.00 max. dc - 800MHz 1.20:1.00 max. 800 - 1000MH

45、z Accuracy 6734B030 6736-030A 6737-030A 5% of full scale 2 - 32MHz 5% of full scale 2 - 30MHz 10% of full scale 1.5 - 2MHz 30 - 32MHz 5% of full scale 2 - 32MHz 10% of full scale 1.5 - 2MHz 32 - 35MHz 6732B, 6734B, 6736A, 6735-300A, 6737A 5% of full scale 25 - 512MHz 10% of full scale 512 - 1000MHz

46、Ambient Temperature-40C to +45C (-40F to +113F) Cooling Method All ModelsOil dielectric 50 ohms at the front (connec- tor) end, 25 ohms at the mid-point, to compensate for the resistance already passed over, and zero ohms at the rear where the resistor joins the housing, forming the return conductor of the coaxial circuit. This produces a uniform, practically reflectionless line termination over the stated frequencies of the load resistor. 5 CAUTION Model 6735-300A is rated for 1200