INSTRUCTION BOOK OPERATING INSTRUCTIONS TERMALINE® LOAD RESISTOR MODEL 8578A100GIG This is a preliminary manual. Specifications, limits, and text are subject to change without notice. The information within this manual was as complete as possible at the time of printing. Bird Electronic Corporation is not liable for errors.
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 throughly understood and applied to all phases of operation and maintenance. Keep Away From Live Circuits Operating personnel must at all times observe normal safety regulations. Do not replace components or make adjustments to the equipment with the high voltage supply turned on.
+ Note: Calls attention to supplemental information. 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 Do not insert a screwdriver or any thin metal objects through the perforated cooling air grilles while the load is in operation. The power within the unit could arc over and will cause serious injury to personnel and damage to the unit.
Safety Statements USAGE ANY USE OF THIS INSTRUMENT IN A MANNER NOT SPECIFIED BY THE MANUFACTURER MAY IMPAIR THE INSTRUMENT’S SAFETY PROTECTION. USO 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.
Bird Model 8578A100GIG Termaline Load Resistor SERVICIO A MENOS QUE ESTÉ CAPACITADO PARA HACERIO. WARTUNG ANWEISUNGEN FÜR DIE WARTUNG DES GERÄTES GELTEN NUR FÜR GESCHULTES FACHPERSONAL. ZUR VERMEIDUNG GEFÄHRLICHE, ELEKTRISCHE S C H O CK S , S I ND WARTUNGSARBEITEN A U S S CH L I Eß L I CH VO N QUALIFIZIERTEM SERVICEPERSONAL DURCHZUFÜHREN. ENTRENTIEN L’EMPLOI DES INSTRUCTIONS D’ENTRETIEN DOIT ÊTRE RÉSERVÉ AU PERSONNEL FORMÉ AUX OPÉRATIONS D’ENTRETIEN.
About This Manual This instruction book covers the model 8578A100GIG Termaline Load Resistor. This instruction book is arranged so that essential information on safety appears in the front of the book. Reading the Safety Precautions Section before operating the equipment is strongly advised. The remainder of this Instruction Book is divided into Chapters and Sections. At the beginning of each chapter, a general overview describes the contents of that chapter.
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Table of Contents Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . i Warning Statements.. . . . . . . . . . . . . . . . . . . . ii Caution Statements . . . . . . . . . . . . . . . . . . . . ii Safety Statements. . . . . . . . . . . . . . . . . . . . . iii About This Manual. . . . . . . . . . . . . . . . . . . . . v Introduction . . . . . . . . . . . . . . . . . . . . .1 General . . . . . . . . . . . . . . . . . . . . . . . . . .1 Description . . . . . . . . . . . . . . . . . . . . . . . .
Bird Model 8578A100GIG Termaline Load Resistor Operating Instructions . . . . . . . . . . . . . . . .11 General . . . . . . . . . . . . . . . . . . . . . . . . . .11 Load Power . . . . . . . . . . . . . . . . . . . . . . . .11 Operation Under Normal and Abnormal Conditions . . . . . . .11 Shut Down . . . . . . . . . . . . . . . . . . . . . . . .11 Measurement and Monitoring of RF Power . . . . . . . . . .12 Maintenance . . . . . . . . . . . . . . . . . . . .13 Troubleshooting . . . . . . . . . . . . . .
Chapter 1 Introduction General The Model 8578A100GIG is an air cooled, high powered Termaline Load resistor designed to be efficient, rugged and trouble free. It is designed to be forced air cooled and is capable of dissipating RF line power up to 10 kW, with 1000 ft3/min (28.32 m3/min) or more of externally supplied cooling air through it.
Bird Model 8578A100GIG Termaline Load Resistor Specifications Impedance 50 ohms nominal VSWR 1.15:1 maximum 88-108 MHz Connectors Standard— 1-5/8" Diameter Swivel Flange Optional— 3-1/8" Diameter Unflanged Power Rating 10 kW continuous duty @ ³ 1000 ft3/min (28.
Introduction Unpacking and Inspection 1. Carefully inspect the shipping container for signs of damage. If damage is noticed, do not unpack the unit. Immediately notify the shipping carrier and Bird Electronic Corporation of the damage. 2. If the container is not damaged, unpack the unit. Save the packing materials for repacking. 3. Inspect all of the components for visual signs of damage. Immediately notify the shipping carrier and Bird Electronic of equipment damage or missing parts.
Bird Model 8578A100GIG Termaline Load Resistor Figure 1 Model 8578A100GIG Outline Drawing 4
Chapter 2 Theory of Operation General The 8578A100GIG is a high powered, air-cooled, RF load used for termination of coaxial transmission lines. The RF energy, when converted into heat, is transmitted directly to the external area by a forced air system. RF Section Description The RF section of the 8578A100GIG is composed of a parallel combination of tubular resistors.
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Chapter 3 Installation This chapter provides information for on site requirements, unpacking, inspection, and preparing the Model 8578A100GIG for use. Mounting Location This unit is designed for use in any of the mounting configurations called out in the outline drawing. CAUTION Do not block airflow. Air enters the housing through perforated grilles at the side of the unit and exhausts through the opposite grille of the unit. Blocking these grilles could cause unit failure.
Bird Model 8578A100GIG Termaline Load Resistor 1. Attach the transmitter interlock connections to the three binding posts on the control panel. Refer to figure 2. Connecting RF Line After installation of the load, the coaxial RF transmission line may be attached using the standard 1-5/8" EIA Swivel Flange Connector or the optional 3-1/8" Unflanged Connector kit p/n 8731A700. Removal of the 1-5/8" EIA Swivel Flange Connector While following these instructions, refer to figure 3. 1.
Installation + Note: The coupling must be fastened with all four of the screws. Tighten evenly all around. Swivel Flange Coupling To couple the swivel flange with a flanged RF transmission line, use 1-5/8 coupling kit P/N 4712-020. The kit includes: four 5/16-18 x 1-1/2 bolt and nut sets, O-Ring, and insulated center bullet. Refer to figure 4 while following the instruction below. 1. Insert the center bullet, push it in until it is fully seated. 2. Install the O-Ring in the groove. 3.
Bird Model 8578A100GIG Termaline Load Resistor 3. Snugly set the transmission line against the coupling stops. 4. Position the clamping bands evenly about ¾ inch from the ends of the sleeve. 6. Tighten the clamping bands.
Chapter 4 Operating Instructions General The Model 8578A100GIG has no operating controls. When installed the only requirement is for the interlock switch to be connected to the RF power source. After applying an airflow ³ 1000 ft3/min (28.32 m3/min) to the inlet grill the unit is now ready to accept RF power. Once the unit is set, there is no need for the presence of an operator. Load Power WARNING Surface can reach temperatures in excess of 100°C when maximim power is applied to load.
Bird Model 8578A100GIG Termaline Load Resistor + Note: Always, turn transmitter off first. WARNING Surface can reach temperatures in excess of 100°C when maximum power is applied to load. 2. Allow the unit to cool. 3. Disconnect the RF line. Measurement and Monitoring of RF Power 12 The Model 8578A100GIG Load Resistor may be used in conjunction with any one of the various Bird rigid coaxial line Thruline Wattmeters.
Chapter 5 Maintenance This chapter covers the cleaning, inspection, troubleshooting, and performance information. Troubleshooting WARNING Disconnect this unit from the RF power sources before any disassembly for repair or replacement procedures. The potential for electrical shock exists. For corrections requiring repair or replacement of components refer to the appropriate section. Only those functions within the scope of normal maintenance are listed.
Bird Model 8578A100GIG Termaline Load Resistor or moisture, especially to the RF connector. The outside surface of the unit should be wiped free of dust and dirt occasionally. When necessary the inner RF housing and the outside housing may be cleaned with a mild detergent solution on a cloth. Interior Surfaces The back and top panel may be removed without difficulty for cleaning purposes. Give particular attention to the air intake and exhaust grilles.
Maintenance tance of the load or if you have reason to suspect a resistor has failed, the following procedure may be helpful in finding a faulty resistor. 1. Make a visual inspection of all the resistors. Check for cracks or burned spots on the surface of each resistor. If no visual discrepancies are found to indicate resistor failure, it will be necessary to take resistance measurements on each resistor individually. 2. Use a digital multimeter or an ohmmeter with an accuracy of 1% at 50 ohms.
Bird Model 8578A100GIG Termaline Load Resistor 2. Remove the thermalswitch by unbolting the two screws holding the bracket to the flow detector plate. 3. Replace the thermalswitch by reversing the procedure in steps 1 and 2. Customer Service Any maintenance or service procedure beyond scope of those provided in this section should be referred to a qualified service center. All instruments returned for service must be shipped prepaid and to the attention of the Customer Service Group. Service Group U.S.A.
Maintenance Replacement Parts List Item Qty. Description Part Number 1 9 Ceramic Resistor 5A2453 2 1 Top Panel Assy. 8578A112 3 2 Handle 4 1 Front Panel Assy. 5 1 Thermal Switch 6 3 Terminal Block, Feed Thru 7 1 Resistor Bracket Assy. 8 18 Resistor Clip 5A2443 9 1 1-5/8" EIA Swivel Flange Assy.
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.
DECLARATION OF CONFORMITY Manufacturer: Bird Electronic Corporation 30303 Aurora Road Cleveland, Ohio 44139-2794 Product: TERMALINE LOAD RESISTOR Model: 8578A100GIG The undersigned hereby declares, on behalf of Bird Electronic Corporation of Cleveland, Ohio, that the above-referenced product, to which this declaration relates, is in conformity with the provisions of the following standards; 1. European Standard EN 61010-1:1993 - Safety, Group II.
