3 - 31
Cygnus 2 Operating Manual
3.5.4 Rate Watcher
Cygnus 2 includes a sample and hold function which enables periodic sampling of
the deposition rate by opening and closing the Sensor shutter. If you are controlling
inherently stable deposition sources, this function is useful in maximizing crystal
life. When RateWatcher is enabled, during deposit, rate control will be established.
The Sensor shutter will close for a designated amount of time. The shutter will once
again be opened to validate and adjust the power level. This procedure is repeated
throughout the deposition. Three Material/Deposit parameters—RateWatcher
Option, RateWatcher Time and RateWatcher Accuracy—control this function. See
section 5.1.7, Deposit Page Parameters, on page 5-14.
3.5.5 Handheld Controller
A Handheld Controller, see Figure 3-17, is available as an accessory with Cygnus
2. The Handheld Controller serves as a wired remote to manually control power,
switch crystals and produce a STOP.
The Handheld Controller is attached to Cygnus 2 with a modular plug to the front
panel.
Power is affected only when in Manual mode by moving the POWER/STOP switch
laterally. Pressing to the left as indicated by the INCR arrow, increases the power.
Pressing to the right as indicated by the DECR arrow, decreases the power.
A STOP is produced by moving the POWER/STOP switch down.
When on the Sensor Information screen, a crystal switch is activated by pressing
the red button on the body of the controller.
The Handheld Controller kit includes a convenience hook for the Handheld
Controller that can be attached to Cygnus 2’s mounting ears or some other
accessible location.
Figure 3-17 Handheld controller
To Next Page
Loading...
Need help?
General
