TM 10-6640-215-13 CHAPTER 2 OPERATING INSTRUCTIONS SECTION I.  DESCRIPTION AND USE OF OPERATOR'S CONTROLS AND INDICATORS Alphabetical Index Paragraph Title Paragraph Damage From Improper Settings .............................................................................................................. 2-1 Operator Controls and Indicators .............................................................................................................. 2-2 2-1. DAMAGE FROM IMPROPER SETTINGS. All operators should become thoroughly familiar with the operator's controls and indicators, and with the proper operating procedures for the Petroleum Laboratory.  Certain precautions must be observed in the operation of the equipment and its components.  Procedures are presented in sequence and must be followed in sequence. 2-2.OPERATOR CONTROLS AND INDICATORS. Table 2-1 contains the controls and indicators for the Petroleum Laboratory exterior.  Tables 2-2 through 2-7 are for the other functional systems within the Petroleum Laboratory.  Operator's controls and indicators for the Semi-Trailer unique equipment  are  listed  in  Tables  2-8  through  2-10.    The  ECU  controls  are  listed  in  Table  2-11.    Operator's  controls  and indicators for the refrigerator, convection ovens, gas alarm control unit, RVP bath, ice maker, gum bath system, copper strip corrosion bath, analytical balance, etc., are described in their respective TMs (see Appendix A for TM number). a. Exterior.  Figure 2-1 and Table 2-1 list the Petroleum Laboratory's exterior controls and indicators. Table 2-1.  Petroleum Laboratory Exterior Controls and Indicators Control or Indicator Function Water Inlet/Outlet Valve Selection Lever Selects position of water inlet/outlet valve. Either IN or OUT for water directional flow. Purge Alarm Buzzer Indicates  by  sound  if  one  of  purge  doors  is  not opened when purge cycle is initiated. 2-1