ALTRONIC RESEARCH, INC.（ALTRONIC研究公司。）.pdfVIP

ALTRONIC RESEARCH, INC. P.O. BOX 249 YELLVILLE, ARKANSAS 72687-0249 U.S.A. LIQUID-COOLED COAXIAL LOAD RESISTOR MODEL 9725 TABLE OF CONTENTS INTRODUCTION 1 PRECAUTIONS2 GENERAL DESCRIPTION 4 ELECTRICAL CHARACTERISTICS6 COOLANT 9 COOLING SYSTEMS13 INSTALLATION17 OPERATION19 CALORIMETRY 20 SPECIFICATIONS23 MAINTENANCE25 WARRANTY 29 ILLUSTRATIONS, TABLES AND GRAPHS Fig. 1 The OMEGALINE® Coaxial Load Resistor 5 Fig. 2 Applied Power Coolant Flow vs. Coolant Temperature Rise 7 Fig. 2A Power Input Coolant Flow vs. Coolant Temperature Rise 8 Fig. 3 Freezing and Boiling Points of Glycol-Water Mixtures 10 Fig. 3A Glycol Concentration Table 11 Fig. 4 Minimum Water Flow Rate Requirements 11 Fig. 5 Internal Pressure Drop vs. Flow Rate 12 Fig. 6 Alternative Cooling Systems 13 Fig. 7 Coolant Volume vs. Operating Time 15 Fig. 8 Tank Sizes 16 Fig. 9 The Calorimetry Set-up 20 Fig. 10 Kt for Ethylene Glycol Mixtures vs. Temperature 21 Fig. 11 Density of Ethylene Glycol Mixtures vs. Temperature 22 Fig. 12 Flow-Meter Correction Factor 22 Fig. 13 VSWR Nomograph 24 Fig. 14 Model 9725 Exploded View/Parts List 27 Fig. 15 RF Input Assembly View 28 INTRODUCTION This manual gives you specific information on the installation, operation and service of OMEGALINE® coaxial resistors. Most of the loads are field serviceable, but we recommend their return to us for repair. Mistakes can be costly compared to the low cost for our trained personnel to make the repairs and return the load to new performance specifications. Labor and packaging costs are minimal. We take the l