Bird-technologies 8255 Manuel d'utilisateur

INSTRUCTION BOOKOPERATING INSTRUCTIONSTERMALINECOAXIAL LOAD RESISTORMODELS8251, 8252 & 8255ÓCopyright 1997 by Bird Electronic CorporationInstruct

Operating Instructions. ...9Normal Operation. ...9Operation Under Abnormal Conditions. ...9Shutdown. ...

Customer Service. ...17Sales/Repair Facilities. ...17Sales Facilities. ...17Preparation for Shipm

Bird Model 8251/52/55 Termaline Coaxial Load Resistorx

Chapter 1IntroductionThis publication refers to the Termaline Coaxial Load Re-sistor Models 8251, 8252, and 8255. The differences be-tween models are

Power andUtility Re-quirementsThese loads are passive devices that are self-containedand require only RF input to function.Environ-mental Re-quirement

SpecificationsIntroduction3Impedance, Nominal 50 ohmsVSWR:Models 8251/52Model 8251Model 82551.10 max. dc to 1000 MHz1.25 max. 1000-2000 MHz1.30 max. 2

Bird Model 8251/52/55 Termaline Coaxial Load Resistor4

Chapter 2Theory of OperationThese loads consist essentially of a carbon film resistoron a ceramic substrate immersed in a dielectric coolant.The resis

Bird Model 8251/52/55 Termaline Coaxial Load Resistor6O-ring sealFigure 1Shipping PlugO-Ring SealFigure 2Vent Plug

Chapter 3InstallationCAUTIONThis equipment is designed for operation in ahorizontal position only, with mounting brackets down.Do not operate in any o

Bird Model 8251/52/55 Termaline Coaxial Load Resistor

Connecting to TransmitterModels 8251& 8255Connect the load to the transmitting equipment undertest with 50 ohm coaxial cable (RG-8A/U, RG-9/U,RG-2

Chapter 4Operating InstructionsNormalOperationCAUTIONDo not operate this equipment over the rated 1000watts continuously. Damage to the resistive elem

EmergencyShutdownWARNINGNever attempt to connect or disconnect RF equipmentfrom the transmission line while RF power is beingapplied. Leaking RF energ

Chapter 5MaintenanceTroubleshootingFor corrections requiring repair or replacement or compo-nents, refer to the appropriate section for your specificm

InspectionWith the rugged and simple construction of the loads, pe-riodic inspection will be necessary at only about sixmonth intervals. Inspection sh

DC Resistance MeasurementPreparationand ToolsRequiredBe sure that the vent plug is installed.Preparation:sTools: Common hand toolssOhmmeter with an ac

These tests are by no means a necessity to the operationof the load but merely guidelines for the users informa-tion and advisement.DisassemblyThere a

Rear Sealand CoolantBefore any disassembly of the rear of the load, if the cool-ant has not already been drained from the tank, standthe radiator on e

3. Loosen the 10-32 x 1-1/2 inch screw on theclamping band until the band is free. Remove theband.4. Grasp the RF connector and slowly lift the loadre

StorageNo special preparations for storage are necessary otherthan to cover the equipment to keep out dust and dirt.Store the unit in a dry and dust-f

Safety PrecautionsThe following are general safety precautions that are not necessarily relatedto any specific part or procedure, and do not necessari

Replacement Parts List*Available QC Type ConnectorsBird Model 8251/52/55 Termaline Coaxial Load Resistor18Qty. Description Part Number1 RF Section Ass

19Limited WarrantyAll products manufactured by Seller are warranted to be free from defects inmaterial and workmanship for a period of one (1) year, u

DECLARATION OF CONFORMITYManufacturer: Bird Electronic Corporation30303 Aurora RoadCleveland, Ohio 44139-2794Product: TERMALINE RF COAXIAL LOAD RESIST

CAUTIONCaution notes call attention to a procedure which if not correctlyperformed, could result in damage to the instrument.This symbol appears on th

CAUTIONThe unit is factory filled to the proper level with 0.8 gallons (3.03 liter)of Bird P/N 5-1070. No other coolant should be usedCAUTIONDo not le

SERVICESERVICING INSTRUCTIONS ARE FOR USE BY SER-VICE - TRAINED PERSONNEL ONLY. TO AVOID DAN-GEROUS ELECTRIC SHOCK, DO NOT PERFORM ANYSERVICING UNLESS

About This ManualThis instruction book covers models 8251, 8252, and 8255 Termaline CoaxialResistors.This instruction book is arranged so that essenti

Bird Model 8251/52/55 Termaline Coaxial Load Resistorvi

Table Of ContentsSafety Precautions. ......iWarning Statements. ......iiCaution Statements. ......iiSafe