SIGMA SQM-160 - Manual (Page 22)

Chapter 2 Operation
2-11
2.9 Zero Thickness
Before starting each film deposition, you will probably want to reset the SQM-160
Thickness value to zero. To zero Thickness:
1. Press the Zero switch in the front panel Control section.
In addition to zeroing Thickness, pressing the Zero switch has these effects:
1. The Time display is reset to its programmed value, and starts counting down.
2. The Thickness Setpoint and Timer relays open.
3. The Time SP, Thk SP, and Final Thk LEDs turn off.
2.10 Shutter Operation
The SQM-160 Shutter Relay normally controls the source material shutter. To open or
close the Shutter Relay:
1. Press the Shutter switch in the front panel Control section.
The Open and Closed LEDs light to indicate the Shutter relay status.
2.11 Simulate Mode
In Simulate Mode, the SQM-160 simulates attached sensors. It is an easy way to
become familiar with the SQM-160 front panel controls and programming. In Simulate
Mode you can open/close the shutter to simulate deposition, zero readings, and display
crystal life. You can also test the Time and Thickness setpoint relays and LEDs.
To enter Simulate Mode:
1. Press Program to enter program mode.
2. Press Prev to enter the System Parameters Menu
3. Press Next until SIM MODE is shown.
4. Turn the Control Knob left or right to enable and disable Simulate Mode.
5. Depress the Control Knob to accept the value.
6. Press Program to exit the System Parameters Menu and return to normal mode.