TM 10-6640-239-13 2-28 k. Balance System Controls and Indicators.  Refer to appropriate equipment TM listed in Appendix A for balance system controls and indicators. l. Centrifuge System Controls and Indicators.  Refer to commercial manual for controls and indicators of the centrifuge system. m.    Copper Strip Corrosion Bath Controls and Indicators.  Refer to appropriate equipment TM listed in Appendix A for controls and indicators of the copper strip corrosion bath. n. Distillation Test Apparatus Controls and Indicators.  Refer to commercial manual for controls and indicators of the distillation test apparatus. o. Dropping Point Apparatus Controls and Indicators.  Refer to appropriate equipment TM listed in Appendix A for controls and indicators of the dropping point apparatus. p. Explosion Proof Refrigerator Controls and Indicators.  Refer to appropriate equipment TM listed in Appendix A for controls and indicators of the explosion proof refrigerator. q. Flash Point Testing System Controls and Indicators.  Refer to appropriate equipment TM listed in Appendix A for controls and indicators of the flash point testing system. r. Foaming Test Bath Controls and Indicators.  Refer to appropriate equipment TM listed in Appendix A for controls and indicators of the foaming test bath. s. Kinematic Viscosity Bath Controls and Indicators.  Refer to commercial manual for controls and indicators of the kinematic viscosity bath. t. Laboratory Oven Controls and Indicators.  Refer to commercial manual for controls and indicators of the laboratory ovens. u. Penetrometer Controls and Indicators.  Refer to appropriate equipment TM listed in Appendix A for controls and indicators of the penetrometer. v. Refrigeratin Circulator Controls and Indicators.  Refer to commercial manual for controls and indicators of the refrigerating circulator. w. Universal Bath Controls and Indicators.  Refer to appropriate equipment TM listed in Appendix A for controls and indicators of the universal bath.