INSTRUCTION BOOK OPERATING INSTRUCTIONS TERMALINE® WATTMETER MODEL 6151A Electronic Corporation Cleveland (Solon) Ohio USA ©Copyright 1997 by Bird Electronic Corporation Instruction Book Part Number 920-6151A Revision A Termaline® and Thruline® are Registered Trademarks of Bird Electronic Corporation
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. Do not replace components inside equipment with the high voltage supply turned on.
WARNING Exposure to RF power radiation and the possibility of RF shock or burns exists with some operating conditions. Always be sure to turn off transmitter when connecting or disconnecting wattmeter. When Plug-In Element is removed from the RF line socket, the line section center conductor is exposed. Do not put fingers or other objects into this Plug-In Element socket while RF power is applied.
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.
ASSISTENZA TECNICA LE ISTRUZIONI RELATIVE ALL’ASSISTENZA SONO PREVISTE ESCLUSIVAMENTE PER IL PERSONALE OPPORTUNAMENTE ADDESTRATO. PER EVITARE PERICOLOSE SCOSSE ELETTRICHE NON EFFETTUARRE ALCUNA RIPARAZIONE A MENO CHE QUALIFICATI A FARLA. RF VOLTAGE MAY BE PRESENT IN RF ELEMENT SOCKET - KEEP ELEMENT IN SOCKET DURING OPERATION. DE LA TENSION H.F. PEAT ÊTRE PRÉSENTE DANS LA PRISE DE L’ÉLÉMENT H.F. - CONSERVER L’ÉLÉMENT DANS LA PRISE LORS DE L’EMPLOI.
About This Manual This instruction book covers the model 6151A Termaline Wattmeter. This instruction book is arranged so that essential information on safety is contained 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 will be given, describing the contents of that chapter.
Bird Model 6151A Termaline Wattmeter vi
Table Of Contents Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i Warning Statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i Caution Statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii Safety Statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii About This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v Introduction. . . . .
Bird Model 6151A Termaline Wattmeter viii RF Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Diaphragm and Coolant Oil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Sales/Repair Facility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Sales Facilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Load Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1 Introduction Purpose and Function The Bird Model 6151A Termaline RF Wattmeter is designed to measure RF power under non-radiating conditions. The Wattmeter is coupled to an accurate 50 ohm coaxial load resistor which becomes the transmitter load element, providing a practically reflectionless coaxial line termination up to 2.3 GHz. Power input to the load resistor is sampled by a coupler-detector type voltmeter indicating directly in watts.
Bird Model 6151A Termaline Wattmeter Figure 1 Model 6151A Outline Drawing DIRECT READING METER SCALE IN WATTS 6-11/32 (161 mm) D.C. CABLE, APPROX. 2-3/4' (83.8 cm) LONG. RETRACTABLE HANDLE 3-15/16 (100 mm) LATCH INPUT CONNECTOR, FEMALE "N", D.C.
Chapter 2 Theory of Operation Travelling Waves The voltage and current present on a transmission line are expressed as the sum of the voltages and currents of two waves; forward and reverse. Both waves are identical except in the direction of travel. The Model 6151A measurement concept basically samples the voltage and current only of the wave travelling from the source to load.
Bird Model 6151A Termaline Wattmeter dielectric coolant carries the electrically generated heat from the resistor to the walls of the cylindrical cooling tank. The tank is encased in a set of metal radiation fins to which heat is conducted and carried off by air convection. A synthetic rubber diaphragm located in the rear dome on the load allows the coolant to expand as the temperature rises.
Chapter 3 Installation This chapter provides information for preparing the 6151A for use. Location Free air circulation around the wattmeter is essential. Position the Model 6151A with clearance around it and do not place it near heated surfaces. The wattmeter should have at least a 4 inch clearance on all sides. Keep the space above the Model 6151A unobstructed to provide adequate natural air convection for good heat transfer. Use the wattmeter in a horizontal position only.
Bird Model 6151A Termaline Wattmeter To remove the meter case: 1. Raise the buttons at the sides of the case, one at a time, to lift the spring above the notch in the hook. Use a flat blade screwdriver. 2. Pull the housing straight off of the radiator. 3. Place the meter in a position where the meter can be easily read while the transmittter is being adjusted. The meter may be read either standing or on its’ back. To assemble the meter case: 1.
Chapter 4 Operating Instructions WARNING Exposure to RF power radiation and the possibility of RF shock or burns exists with some operating conditions. Always be sure to turn off transmitter when connecting or disconnecting wattmeter. When Plug-In Element is removed from the RF line socket, the line section center conductor is exposed. Do not put fingers or other objects into this Plug-In Element socket while RF power is applied.
Bird Model 6151A Termaline Wattmeter Measuring Transmitter Power WARNING Do not attempt to operate the Termaline Wattmeter for prolonged periods at higher than read load levels. Damage to the equipment and injury to operator may result. The meter indicates the power dissipated in the load portion of the instrument. Losses introduced by the cable between the transmitter and the wattmeter, if significant, must be added to the power, indicated by the Model 6151A Wattmeter.
Chapter 5 Maintenance This chapter covers the cleaning, inspection, troubleshooting, and replacement parts. Troubleshooting For corrections requiring repair or replacement of components, refer to the appropriate section for your specific model. Table 1 Troubleshooting Problem Coolant oil leaking around clamping band or radiator housing. Radiator overheating. High or low dc resistance values. Incorrect power reading. Possible Cause Clamping bands not tight.
Bird Model 6151A Termaline Wattmeter Inspection Inspection will be necessary at six months intervals. Check for coolant oil seepage around the radiator tank, particularly at the front and back around the underside of the clamping band. If leakage is observed refer to the troubleshooting table and check tightness of the clamping screw and the fasteners around the front cylinder. Preventive Maintenance Preventive maintenance is limited to: s Cleaning the equipment, particularly the radiator fins.
Maintenance 3. Remove the diaphragm cover and lift the diaphragm from the back end of the radiator tank. Inspect the diaphragm. If it is no longer soft and pliable or shows signs of surface cracks it should be replaced. 4. The coolant level should be about one inch below the top of the radiator cylinder. The coolant should be a clear to a light yellow color, if not, it may be contaminated and should be replaced.
Bird Model 6151A Termaline Wattmeter Pan Asia Sales Office Bird Electronic Ltd 3A Unit 6 Tyrwhitt Road Singapore 0820 Phone: 65 299 2537 Fax: 65 299 8509 Storage No special preparations for storage are necessary other than to cover the equipment to keep out dust and dirt. Store these units in a dry and dust-free environment where the ambient temperature will remain within the -40°C to +45°C (-40°F to +113°F) working range of the wattmeter.
Maintenance *Available “QC” Type Connectors Connector N-Female N-Male HN-Female HN-Male LC-Female LC-Male BNC-Female BNC-Male SMA-Female SMA-Male Part Number 4240-062 4240-063 4240-268 4240-278 4240-031 4240-025 4240-125 4240-132 4240-336 4240-334 7/8" EIA 4240-002 1-5/8" EIA Fixed 4240-096 7/16" IEC (Jack) Type 169-4 4240-344 Connector LT-Female LT-Male C-Female C-Male UHF-Female UHF-Male TNC-Female TNC-Male SC-Female Mini UHFFemale 7/16" IEC (Plug) Type 169-4 1-5/8" EIA Swivel Open Term.
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.
