Thermo Scientific Apreo User's Operation Manual page 172

The bayonet is designed to make a positive and secure connection to the sample carrier so that it remains
horizontal and in a straight line to connect with the carrier adapter within the specimen chamber.
Gate Valve
The Gate Valve has positions that are defined by the following statuses:
• rotated position of the Gate Valve Lever – LOCK / UNLOCK
The position has to be turned from LOCK to UNLOCK to be able to move the loading rod IN and OUT
• colored strips on the side of the exposed barrel axis – one / two when IN / OUT
• Position 1 - IN and LOCK
• Position 2 - IN and UNLOCK
• Position 3 - OUT and UNLOCK
• Position 4 - OUT and LOCK (prevents vacuum closing valve).
The Gate Valve has two safety movements.
• it can be placed over the entry hole on the slide
• it can be locked in place by a turn of the connecting knob (securing the closure of the valve)
A system interlock takes care of correct conditions (system vacuum, accelerating voltage) for loading and unloading
cycles (movement of the gate valve).
Controls
There are 2 buttons (illuminated while in operation) and 1 indicator lamp:
• P (pump) labeled button – press it to pump the loader chamber to the required vacuum; the stage moves to a
loading position at the same time. If the system reaches the appropriate vacuum level, the lever interlock is
released and the gate valve can be opened. The pump cycle is automatically terminated when the required
vacuum is reached.
• V (vent) labeled button – press it once to vent the loader chamber. The vent cycle continues untill the P button is
pressed or it is terminated by a time-out.
• OK labeled indicator lamp – lights up when vacuum is reached after pumping. When it goes out, this means the
wait time has been exceeded and the appropriate vacuum for a transfer has been lost. Pressing the P button
again will bring the system to vacuum OK status.
The control buttons do not shine when the system is recovering from vacuum status transition (e.g. immediately
after the load/unload sample, during venting the chamber...). After finishing the state transition, the control
buttons will again be in operation.
7-26 User Manual
System Options: Quick Loader
C O N F I D E N T I A L – limited rights
Feb 2018 Revision A