Bird-technologies 8890-400 Series Manuel d'utilisateur

INSTRUCTION BOOKOPERATING INSTRUCTIONSTERMALINE®WATTMETERSERIES 8890-400Copyright 1997 by Bird Electronic CorporationInstruction Book Part Number 920-

Shipment...27Storage. ...28Troubleshooting. ...29Replacement Parts List...

Chapter 1IntroductionThis instruction book is intended for use by operators of theModel 8890-400 Termaline Wattmeter.This chapter contains introductor

AccessoryItemsThermoswitch P/N 8890-008 — An optional item for Models8891-400A and 8897-400A.Blower Assembly P/N BA-310 — An optional item for Mod-els

SpecificationsImpedance 50 ohmsVSWR 1.15 - 1.00 dc to 1000 MHzConnectorsModel 8891-400A, 8891-420BModel 8897-400A3-1/8” EIA flanged3-1/8” unflanged(Fl

4Bird Model 8890-400 Series Termaline Wattmeter17-3/16 ±3/32(437 ±2mm)2-61/64 ±1/32(75 ±1mm)INTERLOCK THERMOSWITCH(OPTIONAL)20-23/32 ±3/32(526 ±2mm)MT

Chapter 2Theory of OperationThe Series 8890-400 equipment consists essentially of afilm-on ceramic resistor immersed in a dielectric coolant.The resis

CouplingCircuitThe coupling circuit which samples the travelling waves isin the plug-in element. Energy will be produced in the cou-pling circuit of t

DielectricCoolant andSealThe dielectric coolant, a low volatility, high flash point syn-thetic oil, is used for its desirable thermal characteristicsa

8Bird Model 8890-400 Series Termaline Wattmeter

Chapter 3InstallationPower andUtilityRequirementsThe Series 8890-400 Wattmeters are fully self-contained. Noadditional equipment or outside power sour

Models 8897-400A, 8897-415B, and 8897-420B: The RF sec-tion is unflanged. It is inserted into the transmission lineusing an unpressurized straight cou

11InstallationRF Coaxial Line Clamping Bands Connector Sleeve Bullet RF Load ConnectorRF Coaxial Line 3/8-16 x 1-1/2 Bolt Bullet RF Load ConnectorFigu

Thermoswitch As an optional item, the dummy load may be provided withan interlock thermoswitch assembly, P/N 8890-008. Wheninstalled in the radiator,

2. Stand the unit on its back end with the connec-tor end up.+Note: In this position there is no danger of thecoolant pouring out through the socket p

the interlock leads to the lugs (G) of the con-nector base.+Note: Be sure that the larger captive clampingnut (A) is in place over the base plug (D) w

MeterPlacementA standard ten foot (3 meter) cable is supplied with eachwattmeter. It is equipped with a dc connector plug on oneend and lugs on the ot

16Bird Model 8890-400 Series Termaline Wattmeter

Chapter 4Operating InstructionsUse andFunction ofControlsThere are no operating controls for the Series 8890-400Wattmeters. The Model BA-310 Blower As

Start-Up Proceed according to the instructions pertaining to the spe-cific transmitting equipment. Due to the difference inVSWR between the dummy load

WARNINGNever attempt to disconnect RF equipment from thetransmission line while RF power is being applied.Leaking RF energy is a potential health haza

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

20Bird Model 8890-400 Series Termaline Wattmeter

Chapter 5MaintenanceThis chapter contains operator maintenance instructions,troubleshooting, and parts information.All instruments returned for servic

CleaningThe most important cleaning task is to remove accumula-tions of dust, lint, and grime that could interfere withproper air circulation and ther

sInspect the cooling fins for accumulation ofdust and lint. Also, check the painted metalparts for signs of corrosion.Preventive MaintenanceThe main f

RepairsAs indicated in Disassembly, the element is not subject tofield repair and must be replaced if it is found to be defec-tive. Similarly if the R

DisassemblyTo change the load resistor assembly:1. Place the unit on its back end, connector up,and loosen the 10-32 x 1-1/2 inch screw on theclamping

CoolantThe level of the dielectric coolant should remain constant inthe unit even after prolonged usage under normal operatingconditions. Inspect occa

If replacement of the RF input connector becomes necessary,proceed as follows:1. Remove the four 8-32 x 5/16 inch round headmachine screws from the co

5. Cover the meter face with padding to protectthe glass window. Wrap the housing and placeit in the same container as the wattmeter.6. Because of the

TroubleshootingTable 1 contains troubleshooting information for problemswhich can occur during normal operation. Locate the prob-lem, review the possi

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

Replacement Parts ListITEM QTY DESCRIPTION PART NUMBER11RF section assemblySeries 8891-400ASeries 8897-400A8891-4028897-40221O-Ring, Resistor Housing

*Available QC Type ConnectorsN-Female 4240-062 LT-Female 4240-012N-Male 4240-063 C-Female 4240-100HN-Female 4240-268 C-Male 4240-110HN-Male 4240-278 U

32Limited 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 WattmeterModels: 8890-

Safety StatementsUSAGEANY USE OF THIS INSTRUMENT IN A MANNER NOTSPECIFIED BY THE MANUFACTURER MAY IMPAIRTHE INSTRUMENT’S SAFETY PROTECTION.USOEL USO D

WARTUNGANWEISUNGEN FÜR DIE WARTUNG DES GERÄTESGELTEN NUR FÜR GESCHULTES FACHPERSONAL.ZUR VERMEIDUNG GEFÄHRLICHE, ELEKTRISCHESCHOCKS, SIND WARTUNGSARBE

About This ManualThis instruction book covers the models:8890-400A 8897-400A8891-415B 8897-415B8891-420B 8897-420BThis instruction book is arranged so

Table of ContentsSafety Precautions ...iSafety Symbols ...iWarning Statements ...iiCaution Stat

RF Connection.......10Thermoswitch. ......12Meter Placement. ......15Blower Assembly......