Analytical Balance

CHAPTER 2 OPERATING INSTRUCTIONS - TM-10-6640-216-13P_45

TM-10-6640-216-13P Airmobile Aviation Fuel Laboratory Manual
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TM 10-6640-216-13&P 1-14. FUNCTIONAL DESCRIPTION OF LABORATORY UNIQUE EQUIPMENT- continued. j. Desiccating Cabinet. The desiccating cabinet is mounted on the curbside wall above the countertop. It is used for ASTM test D-2276. The cabinet is constructed of stainless steel with glass side panels. A molded rubber door gasket provides an airtight fit for the door. The cabinet also is provided with a manual relief valve. k. Analytical Balance. The analytical balance is mounted on he damping vibration support which is located on the curbside countertop. It is used in the performance of ASTM test D-2276. The analytical balance comes with its own power supply unit which receives 110V, 60 Hz, single-phase power from a convenience outlet in the laboratory compartment. It is a fully automatic, top-loading balance with upfront, one-finger control of all balance functions. It provides digital readout that can be viewed from any angle. The door on top and one on each side make the weighing chamber fully accessible for formulations and liquid transfer operations. The weighing chamber is housed in glass for unobstructed viewing. l. Gas Alarm System. The gas alarm system consists of a main control unit (cabinet assembly) and one remote detector assembly. The main control unit is wall mounted on the curbside and connects electrically to the detector assembly. The system operates on 110V, 60 Hz, single-phase power. The main control unit supplies 5.5 VDC to the detector. The alarm is calibrated for propane and has a setting of 20 to 40 percent of the lower explosive limit (lel) of gasoline. An indicating meter in the control unit shows the concentration being monitored and adjustable dual-level alarm circuits are triggered whenever a concentration exceeds the lel. The alarm alerts personnel of combustible mixtures that could cause explosions or cause fires, and automatically activates the air purge system. m. Ice Maker. The ice maker is mounted below the countertop on the curbside of the laboratory. It operates on 110V, 60 Hz, single-phase power. It is a completely self-contained ice cuber and will produce up to 53 pounds of ice in 24 hours. It has the capacity to store up to 35 pounds of ice. n. Sampling and Gaging Kit. The sampling and gaging kit is used to perform ASTM test D-270, D-287, D-1085, D-1086, D-1250, and D-1298. It is a portable petroleum testing kit which is stored in the laboratory cabinets. It consists of the carrying case, shoulder strap, gravity computer, cupcase thermometer, hydrometer cylinder, gasoline indicating paste, water indicating paste, image tape and bob, weighted beaker sampler, and standard hydrometers. 1-26

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