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BIRD Termaline 8920 Series Operation Manual

Load resistor
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®
Termaline
Load Resistor
Series 8920
Operation Manual
©Copyright 2016 by Bird Technologies, Inc.
Instruction Book Part Number 920-8920S Rev. H
Termaline® and Thruline® are Registered Trademarks
of Bird Electronic Corporation

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Summary of Contents for BIRD Termaline 8920 Series

  • Page 1 ® Termaline Load Resistor Series 8920 Operation Manual ©Copyright 2016 by Bird Technologies, Inc. Instruction Book Part Number 920-8920S Rev. H Termaline® and Thruline® are Registered Trademarks of Bird Electronic Corporation...

  • 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: Caution Statements

    Do not contaminate the coolant with pipe sealant. See page 4 CAUTION If installed, connect optional interlock before applying RF power. See page 4 CAUTION Use only Bird coolant, P/N 5-1070, to prevent damage to the load. See page 10.

  • Page 5: 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 6 Termaline® 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 7 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 8: About This Manual

    When inquiring about updates to this manual refer to the part number and revision on the title page. Chapter Layout Introduction — Describes the features of the Bird Termaline, Semiconductor, RF Load Resistor lists equipment supplied and optional equipment, and provides power-up instructions. Theory of Operation —...

  • Page 9: Table Of Contents

    Table of Contents Safety Precautions ..............i Safety Symbols .

  • Page 10: Chapter 1 Introduction

    Bird 8920 Series Loads are portable, 50 ohm, coaxial RF transmission line terminations, designed for frequency ranges of DC – 1 GHz. Bird 8920D Series Loads are identical, except that they are designed for the UHF (470 – 860 MHz) band. They provide accurate, dependable, and low reflection line terminations. Up to 5000 watts of RF power can be dissipated.

  • Page 11: 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 12: 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. Note: If there is damage, immediately notify the shipping carrier and Bird Technologies. Mounting Place the load in a dry, dust and vibration free environment. Do not use outdoors or in areas of condensing humidity.

  • Page 13: Setup

    Figure 1 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 14: Connecting Rf Power

    Termaline® Load Resistor Figure 2 Thermoswitch Assembly Connecting RF Power After installing the load, the RF transmission line can be attached using standard coaxial line coupling kits. WARNING Never attempt to connect or disconnect RF equipment from the transmission line while RF power is being applied.
  • Page 15 Installation Unflanged Coupling Note: To couple the unflanged connector with an unflanged RF line, use an appropriate coupling kit. Refer to while following the instructions below: Figure 4 1. Insert the center bullet and bottom it on the midpoint nibs. 2.

  • Page 16: Chapter 4 Operating Instructions

    Failure to do so could result in an explosion or severe burns. 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 transmitter equipment.

  • Page 17: Chapter 5 Maintenance

    Chapter 5 Maintenance This chapter covers cleaning, inspection, trouble-shooting, and specifications for the Bird 8920 series loads. WARNING 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 18: Inspection

    Termaline® Load Resistor Inspection Inspect the unit every six months. Check for coolant leakage around the clamping band and the thermoswitch. Also check for corrosion. 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.

  • Page 19: Coolant Level

    RF Connector The Model 8921, only, has a special Bird “QC” connector which allows easy changing of the RF connector. This does not disturb the coolant seal or affect the electrical continuity of the load. To change the connector, proceed as follows: 1.

  • Page 20: Load Resistor

    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 21: Specifications

    Maintenance Specifications Frequency Range 8921-MM-3-150 100 - 200 MHz 8922D, 8926D, 8927D 470 – 860 MHz All other models DC – 1 GHz Power Rating 5000 W continuous duty Peak Power for Pulse Width 1 μs 150 kW 10 μs 115 kW 100 μs 80 kW...

  • Page 22: Replacement Parts

    Termaline® Load Resistor Replacement Parts Description Part Number RF Load Resistor: 8921 8890A050 8922, 8922D 8892-015 8926 8891-050 8926D 8891-071 8927 8897-003 8927D 8897-006 8928 8898-006 Resistor O-Ring 5-230 Clamping Band Assembly 2430-055 Plug Vent 2450-094 Shipping 2450-049 Interlock Thermoswitch 8890-008 Thermoswitch Body 8890-005...

  • Page 23: Available "Qc" Type Connectors

    Maintenance 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 LC-Female 4240-031 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 SMA-Female 4240-336 SMA-Male...

  • Page 24: 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;...

This manual is also suitable for:

Termaline 8921Termaline 8922Termaline 8926Termaline 8927Termaline 8928Termaline 8922d ... Show all

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