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Summary of Contents for BIRD Termaline 8792 Series
- Page 1 ® Termaline Load Resistor Series 8792 Operation Manual ©Copyright 2017 by Bird Technologies, Inc. Instruction Book Part Number 920-8792/93 Rev. A Termaline and Thruline are registered trademarks of Bird Electronic Corporation...
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Page 2: Safety Precautions
Safety Precautions The following are general safety precautions that are not necessarily related to any specific part or procedure, and do not necessarily appear elsewhere in this publication. These precautions must be thoroughly understood and apply to all phases of operation and maintenance. WARNING Keep Away From Live Circuits Operating Personnel must at all times observe general safety precautions. -
Page 3: Safety Symbols
Safety Precautions 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. This symbol indicates that a shock hazard exists if the precautions in the instruction manual are not followed. -
Page 4: Warning Statements
Termaline® Load Resistor Warning Statements The following safety warnings appear in the text where there is danger to operating and maintenance personnel and are repeated here for emphasis. WARNING Never attempt to disconnect RF equipment from the transmission line while RF power is being applied. -
Page 5: Caution Statements
Safety Precautions Caution Statements The following equipment cautions appear in the text whenever the equipment is in danger of damage and are repeated here for emphasis. CAUTION The water flow must be kept in the proper direction; incorrect flow will cause almost immediate burnout. -
Page 6: Safety Statements
Termaline® Load Resistor Safety Statements USAGE ANY USE OF THIS INSTRUMENT IN A MANNER NOT SPECIFIED BY THE MANUFACTURER MAY IMPAIR THE INSTRUMENT’S SAFETY PROTECTION. EL USO DE ESTE INSTRUMENTO DE MANERA NO ESPECIFICADA POR EL FABRICANTE, PUEDE ANULAR LA PROTECCIÓN DE SEGURIDAD DEL INSTRUMENTO. BENUTZUNG WIRD DAS GERÄT AUF ANDERE WEISE VERWENDET ALS VOM HERSTELLER BESCHRIEBEN, KANN DIE GERÄTESICHERHEIT BEEINTRÄCHTIGT WERDEN. - Page 7 Safety Precautions SERVICE SERVICING INSTRUCTIONS ARE FOR USE BY SERVICE - TRAINED PERSONNEL ONLY. TO AVOID DANGEROUS ELECTRIC SHOCK, DO NOT PERFORM ANY SERVICING UNLESS QUALIFIED TO DO SERVICIO LAS INSTRUCCIONES DE SERVICIO SON PARA USO EXCLUSIVO DEL PERSONAL DE SERVICIO CAPACITADO.
- Page 8 Termaline® Load Resistor CONNECT INTERLOCK TO TRANSMITTER BEFORE OPERATING. BRANCHER LE VERROUILLAGE À L'ÉMETTEUR AVANT EMPLOI. CONECTE EL INTERBLOQUEO AL TRANSMISOR ANTES DE LA OPERACION. VOR INBETRIEBNAHME VERRIEGELUNG AM SENDER ANSCHLIESSEN. PRIMA DI METTERE IN FUNZIONE L'APPARECCHIO, COLLEGARE IL DISPOSITIVO DI BLOCCO AL TRASMETTITORE.
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Page 9: About This Manual
About This Manual About This Manual This manual covers the operating and maintenance instructions for the following models: 8792 8792-3 Changes to this Manual We have made every effort to ensure this manual is accurate. If you discover any errors, or if you have suggestions for improving this manual, please send your comments to our Solon, Ohio factory. -
Page 10: Table Of Contents
Table of Contents Safety Precautions ..............i Safety Symbols . - Page 11 Table of Contents Repair ..................10 Replacing a Resistive Element .
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Page 12: Chapter 1 Introduction
Direct Power Measurement When used in conjunction with a Bird Model 6810 Series Thruline Wattmeter or 3127 Series Panel Meters, these load resistors may be used for direct reading power measurements up to 80 kilowatts. Emergency and First Aid Procedures for Ethylene Glycol Contact —... -
Page 13: Chapter 2 Theory Of Operation
Chapter 2 Theory of Operation General Th load resistor is unique in that it utilizes an external water supply for the direct cooling of the resistor element. By using this technique, the need for an intermediate dielectric fluid to transfer the heat generated in the resistor element has been eliminated, reducing the physical size of the load to a virtual minimum. -
Page 14: Cooling Water For Models 8792
Termaline® Load Resistor Cooling Water for Models 8792 The electrical performance of these RF loads is affected by impurities or other chemical additives in the cooling water. The presence of salts in the water definitely makes the device unusable because salts cause a rapid increase in VSWR. -
Page 15: Chapter 3 Installation
To connect to rigid piping, replace the water inlet and outlet hose adapters with 1/2 inch male pipe or pipe fittings, Bird P/N 5-065-2. Take special care when connecting the water lines. The inside of the load is designed so that the water flows properly in only one direction - from the inlet to the outlet. -
Page 16: Flow Switch (Optional)
Be certain the flow through the switch is in the correct direction. Connect with a 1/2 inch NPT Nipple and a 1/2 to 3/4 inch bushing, Bird P/N 5-489-1 and 5-490-1, or connect by hose or pipes. In either case, the flow switch should not be over 20 feet from the load. -
Page 17: Chapter 4 Operating Instructions
Chapter 4 Operating Instructions General The Model 8792 Termaline Load Resistors do not have any operating controls, therefore, operator’s do not need to be present when in use. Proper operation of the equipment is assured if the instructions contained in "Installation"... -
Page 18: Operation As An Rf Wattmeter
Operation as an RF Wattmeter The RF load can be combined with a Bird Rigid Line Series Thruline Wattmeter to form an absorption type wattmeter by inserting the wattmeter line section just ahead of the RF load. Installation and operation of the wattmeter is covered in the Thruline Wattmeter Instruction Book. -
Page 19: Chapter 5 Maintenance
Chapter 5 Maintenance General WARNING Never attempt to disconnect RF equipment from the transmission line while RF power is being supplied. Leaking RF energy is a potential health hazard. The Model 8792 Termaline Coaxial Load Resistors are rugged units of simple design, requiring only nominal and routine attention. -
Page 20: Rf Assembly Resistance Test
Termaline® Load Resistor RF Assembly Resistance Test Note: These tests are by no means a necessity to the operation of the load but merely guidelines for the users information. Accurate measurement of the DC resistance between the inner and outer conductors of the RF input connector will provide a good check of the condition of the load resistor. -
Page 21: Troubleshooting
Maintenance Troubleshooting For corrections requiring repair or replacement of components, refer to the appropriate section for your specific model. Problem Possible Cause Correction Transmitter shuts off or Low or no water flow Increase cooling water flow. will not stay on. Faulty Flow Switch Perform "Preoperational... -
Page 22: Inspecting The Unit
Termaline® Load Resistor 8. Lift the resistor cap assembly [7] off. Note: O-Ring tension may cause a restriction and the resistor cap will require gentle prying under the lip with a flat blade or screwdriver. 9. Lift the load resistor [13] straight up and out. Note: Occasionally, the load resistor will come out with the ground cap assembly due to O-Ring ten- sion. -
Page 23: Replacing Fractured Resistor
Maintenance Replacing Fractured Resistor Wash all the inside portions of the assembly (load housing sections, resistor cap assembly, flow tube, and water chamber) thoroughly under clear running water. Rinse all of the components removed from the load. Reassemble the load with a replacement resistor, see "Reassembling the Unit"... - Page 24 Termaline® Load Resistor Figure 3 RF Load Midsection Figure 4 RF input Assembly (Exploded View)
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Page 25: Replacing The Rf Connector
Maintenance Replacing the RF Connector Note: The RF Coaxial connector consists of the inner conductor [26 or 30] and the outer conductor [28 or 31] respectively. See Figure 4 on page 13 1. Remove the six 1/4-20 x 1 inch socket head cap screws [20] from the flange of the front housing assembly [19]. Figure 4 on page 13 Note: The outer conductor will come off exposing the center conductor and insulator. -
Page 26: Replacing The Time Delay Relay
Termaline® Load Resistor Replacing the Time Delay Relay Note: Procurement and use of the accessory protective control system (comprising the water flow switch and control box) is optional. The instructions and replaceable parts described in this section are only applicable when the optional equipment is installed. Note: The relay cartridge, P/N 5-1664 or 5-1665, in the control box cannot be disassembled or repaired in the field. -
Page 27: Storing
Any maintenance or service procedure beyond the scope of those in this chapter should be referred to a qualified service center. If the unit needs to be returned for any reason, request an Return Material Authorization (RMA) through the Bird Technologies website. All instruments returned must be shipped prepaid and to the attention of the RMA number. -
Page 28: Specifications
Termaline® Load Resistor Specifications Power Rating Models 8792 80,000 watts RF input Impedance 50 ohms input Connector Model 8792 6-1/8” EIA flanged (50 ohm) Frequency Range 1 kHz to 80O MHz VSWR 1.15 max. 1 kHz to 800 MHz Modes CW, AM, FM, SSB, TV, and certain pulse types lnput Water Temperature Range... -
Page 29: Replacement Parts List
Maintenance Replacement Parts List Item Qty. Description Part Number Water chamber assembly 8790-005 Water chamber 8790-031 Hose nipple 5-065-2 lnternal O-Ring seal 5-1250 Water inlet tube 8790-032 Water inlet seal O-Ring 5-1340 Resistor cap rear seal O-Ring 5-1128 Resistor cap assembly 8792-003 Resistor cap subassembly 8792-004... -
Page 30: Limited Warranty
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 specified, from date of shipment and to conform to applicable specifica- tions, drawings, blueprints and/or samples. Seller’s sole 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;...
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