BIRD Termaline 8920 Series Operation Manual
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BIRD Termaline 8920 Series Operation Manual

Semiconductor load resistor
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®
Termaline
Semiconductor
Load Resistor
Series 8920
Operation Manual
This unit requires the supplied vent plug be installed prior to use.
Operating the unit without the vent plug installed WILL result in equipment damage and may
cause personal injury.
©Copyright 2023 by Bird Technologies, Inc.
Instruction Book Part Number 920-8920-SEMICON Rev. B
Termaline® and Thruline® are Registered Trademarks
of Bird Electronic Corporation

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Summary of Contents for BIRD Termaline 8920 Series

  • Page 1 This unit requires the supplied vent plug be installed prior to use. Operating the unit without the vent plug installed WILL result in equipment damage and may cause personal injury. ©Copyright 2023 by Bird Technologies, Inc. Instruction Book Part Number 920-8920-SEMICON Rev. B Termaline® and Thruline® are Registered Trademarks...
  • Page 3 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. Keep Away From Live Circuits Operating Personnel must at all times observe general safety precautions.

  • Page 4: Safety Symbols

    Termaline® Semiconductor Load Resistor Safety Symbols Warnings call attention to a procedure, which if not correctly performed, could result in personal injury. Cautions 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 5: Warning Statements

    Safety Precautions 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. The load weighs 119 lb. (54 kg), do not attempt to lift alone. Two or more people, or mechanical assistance, are required to lift the load.

  • Page 6: Caution Statements

    If installed, connect optional interlock before applying RF power. See page 6 and 9 Use only Bird coolant, P/N 5-1070, to prevent damage to the load. See page 12 Blocking should be used to support the load to avoid damage to the interlock thermoswitch.

  • Page 7: Safety Statements

    Safety Precautions 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 8 Termaline® Semiconductor Load Resistor 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 9 Safety Precautions CONNECT INTERLOCK TO TRANSMITTER/GENERATOR/AMPLIFIER BEFORE OPERATING. BRANCHER LE VERROUILLAGE À L’ÉMETTEUR/GÉNÉRATEUR/AMPLIFICATEUR AVANT EMPLOI. CONECTE EL INTERBLOQUEO AL TRANSMISOR/GENERADOR/AMPLIFICADOR ANTES DE LA OPERACION. VOR INBETRIEBNAHME VERRIEGELUNG AM SENDER/GENERATOR/VERSTÄRKER ANSCHLIESSEN. PRIMA DI METTERE IN FUNZIONE L’APPARECCHIO, COLLEGARE IL DISPOSITIVO DI BLOCCO AL TRASMETTITORE/GENERATORE/AMPLIFICATORE.

  • Page 10: About This Manual

    Termaline® Semiconductor Load Resistor About This Manual This instruction book covers the models listed below: 8921SC13 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 11: Table Of Contents

    Table of Contents Safety Precautions ..............i Safety Symbols .
  • Page 12 Termaline® Semiconductor Load Resistor Shipping the Load ................15 Customer Service .

  • Page 13: Chapter 1 Introduction

    Chapter 1 Introduction Bird 8920 Series Semiconductor Loads are portable, 50 ohm, coaxial RF transmission line terminations. They are designed for frequency ranges of DC – 28 MHz, specially calibrated for greater stability at 13.56 MHz. They provide accurate, dependable, and low reflection line terminations. Up to 5000 watts of RF power can be dissipated.

  • Page 14: Chapter 2 Theory Of Operation

    Theory of Operation Load Resistor Bird 8920 series loads consist of a thin-film-on-ceramic resistor immersed in a dielectric coolant. The resistor, individually selected for its accuracy, is enclosed in a special housing. When surrounded by the coolant, this produces a uniform, practically reflectionless line termination over the specified frequencies.

  • Page 15: Chapter 3 Installation

    If the shipping container is not damaged, unpack the unit. Save shipping materials for repackaging. 2. Inspect unit for visual signs of damage. If there is damage, immediately notify the shipping carrier and Bird Technologies. Site and Shelter Requirements The unit should be operated in a dry, dust and vibration free environment.

  • Page 16: Mounting

    Termaline® Semiconductor Load Resistor Mounting This load is designed for operation in a horizontal position only, with the mounting brackets down.Operation in any other orientation will cause insufficient cooling of the unit leading to premature failure. The load is equipped for either portable use or fixed installation. The mounting brackets on the front and rear faces have four mounting slots arranged in a 4 ...

  • Page 17: Thermoswitch

    Connector - P/N 2450-018 Installing Thermoswitch Bird 8920 series loads can be equipped with an optional interlock thermoswitch, P/N 8890-008. It is normally closed, opening at 236 °C (457 °F), with a rating of 10A @ 120 VAC and 5A @ 230 VAC.

  • Page 18: Interlock Connection

    Termaline® Semiconductor Load Resistor Figure 2 Socket Plug Do not contaminate the coolant with pipe sealant. 6. Sparingly apply pipe sealing compound to the external threads of the thermoswitch only. 7. Install the thermoswitch in place of the plug. Torque to 40 +/-2 ft-lbs. 8.
  • Page 19 Installation The ring-nut (A) must be in place over the base plug (D) with the knurled end facing out. 7. Screw on the cover ring (C). 8. Fasten the cable clamp (E) in place. 9. Tighten both yoke screws (H). 10.

  • Page 20: Connecting Rf Power

    Termaline® Semiconductor Load Resistor Connecting RF Power Before first using the load, perform the following steps. 1. Wipe all connectors and insulator surfaces on the transmission line face with a clean soft cloth. 2. Check the RF input connector for signs of wear, damage, or dirt. 3.

  • Page 21: Chapter 4 Operating Instructions

    "Vent Plug" on page 4 Normal Operation Bird 8920 series loads have no indicators or operating controls. They require no special operating procedures or surveillance when their performance limits are not exceeded. Follow the instructions for the specific generator equipment.

  • Page 22: Chapter 5 Maintenance

    Chapter 5 Maintenance This chapter covers cleaning, inspection, trouble-shooting, and specifications for the Bird 8920 series loads. Never attempt to connect or disconnect RF equipment from the transmission line while RF power is being applied. Leaking RF energy is a potential health hazard.

  • Page 23: Routine Maintenance

    Maintenance Routine Maintenance shows the location of components which may be referred to in this section. Figure 4 Figure 4 Maintenance and Repair Locations Clean the Load  The outside surface of the instrument should be wiped free of dust and dirt when necessary. ...

  • Page 24: Inspect The Coolant

    Disconnect the unit from all power sources before servicing. The unit may be energized from multiple sources. The potential for electric shock exists. To inspect the coolant: Use only Bird coolant, P/N 5-1070, to prevent damage to the load. 1. Remove the load resistor (See "Replace Load Resistor" on page 14 ...

  • Page 25: Repair

    The potential for electric shock exists. Replace RF Connector The following procedure may be used to remove and replace Bird QC connectors. 1. Remove four 8-32 round head machine screws from the corners of the connector flange. 2. Pull the connector straight out.

  • Page 26: Replace Load Resistor

    Termaline® Semiconductor Load Resistor Replace Load Resistor To change the load resistor assembly: 1. Remove the vent plug. 2. Verify the O-Ring is installed on the shipping plug. 3. Install the shipping plug. The load weighs 119 lb. (54 kg), do not attempt to lift alone. Two or more people, or mechanical assistance, are required to lift the load.

  • Page 27: Storage And Shipment

    Maintenance Storage and Shipment Storing the Load 1. Cover the load before storing to keep out dust and dirt. When storing the load it is not necessary to install the shipping plug. 2. Store in a dry, dust-free environment where the ambient temperature will remain between –40 and +45 °C (–40 to +113 °F).

  • Page 28: Customer Service

    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 29: Specifications

    Maintenance Specifications Frequency Range DC – 28 MHz Power Rating 5000 W continuous duty Impedance, Nominal 50 ohms VSWR 1.1 max < 0.1 dB, from 0 to 100% rated power VSWR Stability at stability frequency Stability Frequency 13.56 MHz ± 10 kHz Connectors “QC”...

  • Page 30: Available "Qc" Type Connectors

    Termaline® Semiconductor Load Resistor Available “QC” Type Connectors Connector Part Number BNC-Female 4240-125 BNC-Male 4240-132 C-Female 4240-100 C-Male 4240-110 HN-Female 4240-268 HN-Male 4240-278 4240-031 LC-Female LC-Male 4240-025 Open Term. 4240-080 # 10-32 Nut LT-Female 4240-018 LT-Male 4240-012 N-Female 4240-062 N-Male 4240-063 SC-Female 4240-090...

  • Page 31: 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 specifications, 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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