Robinair SPX 17700Z FLUID PRODUCTS Recovery Recycling R 12 Specifications - 1 
From inside (document excerpt):
ROBINAIR FLUID PRODUCTS Recovery / Recycling R-12 Recovery, Recycling, Recharging Fully automatic function lets you recover, vacuum, leak test, charge, and then walk away. Combines simple operation with superior accuracy. The CoolTech 17700Z recovers, recycles, evacuates, leak tests, and recharges R-12 quickly and accurately. Automatic operation means less attention is needed! Automatic Function — With this new option, you can program the unit to recover, vacuum, leak test, charge, and then walk away without having to operate panel valves.
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Vacuum Leak Test — Will monitor the vacuum level after an evacuation, and inform the technician of a possible leak in the vehicle’s A/C system. Automatic Refrigerant Refill — With this latest advance, you never have to stop in the middle of a job to change refrigerant tanks. The unit maintains 12 to 15 pounds of refrigerant in an internal vessel, and signals when it’s time to change the supply tank, so no monitoring is required. Automatic Air Purge — Eliminates damaging air without any monitoring of gauges or opening of valves. Automatic Oil Drain — The unit automatically drains system oil captured during recovery, and the display reminds you to empty the bottle. Graduations on the container clearly show you how much oil needs to be replaced. Refrigerant Charging — Has never been this easy. Select a charge mode from either the high side, low side, or both. Accuracy features eliminate guesswork! Electronic Scale — The scale is mounted internally for protection and has a dampening mechanism that protects against impact shocks, such as movement over rough surfaces. The scale weighs recovered refrigerant and charges by weight for greatest accuracy. Internal Storage Vessel — Refrigerant is recovered into and charged out of this vessel, which is permanently mounted to the electronic scale for continuing reliability. Internal Manifold — A Robinair exclusive, this block manifold contains all the solenoids that control refrigerant flow in and out of the unit, reducing the possibility of leaking connections and eliminating the need to operate panel valves.