CONTENTS 



INTRODUCTION. . , page 5 



EQUIPMENT... 5 



Calibration Tank. . .6 



Tank Lid. . . 7 



Tank Window. . .9 



Reading Telescope. . . 10 



Thermometer Rack. . .20 



Thermal System. . .12 



Cold Tank. . .13 



Hot Tank. . . 13 



Temperature Controller. . . 13 



Thermal System Improvements. . .15 



Air Conditioning. , .17 



Arrangement of Controls. . . 17 



Arrangement of Equipment. . .18 



Filter. . . 18 



Temperature Standard. . .28 



Pressure Chamber. . .19 



CALIBRATION OF REVERSING THERMOMETERS. . , 21 

 Selection and Preparation. . .21 

 Scale Calibration. . . 23 

 \/„ Determination. . .23 

 Data Reduction. . 24 



Procedure for Determining the Q Factor. .24 

 Distribution. . . 25 

 Thermometer Care, . .25 



CALIBRATION OF OTHER SENSORS. . . 25 

 Thermistor Beads. . .26 

 Sound-Velocity Meters. . .27 



CONCLUSIONS... 28 

 RECOMMENDATIONS. . . 28 



APPENDIX: RESULTS OF CROSS -CALIBRATION 

 PROGRAM... 29 



