SIGMA SQC-122c - Manual (Page 9)

Chapter 1 Quick Start
1-4
1.4 System Connections
S e n s o r
F e e d t h r o u g h
I n - V a c
C a b l e
6 " B N C C a b l e
O s c i l l a t o r
S o u r c e
S h u t t e r
G r o u n d W i r e
E v a p o r a t i o n S u p p l y
O u t p u t C o n t r o l I n p u t
B N C
C a b l e s
This section identifies typical system components and their connection:
System Components
Sensor Holds the quartz crystal used to measure rate and thickness.
Crystals must be replaced occasionally.
In-Vac Cable A coaxial cable that connects the sensor to the feedthrough.
Feedthrough Provides isolation between vacuum and atmosphere for
electrical and cooling lines.
6” BNC Cable Provides a flexible connection from the feedthrough to the
oscillator. Keep this cable as short as possible.
Oscillator Contains the electronics to operate the quartz crystal. Total
cable length to the crystal should be under 40”.
Sensor Input
BNC Cable Connects the oscillator to the SQC-122c input. Lengths up to
100’ are acceptable.
Control Output
BNC Cable Connects the SQC-122c output to the evaporation source’s
control voltage input. Keep the length below 10’.
Ground Wire A wire, typically braided, that connects the vacuum system to
the SQC-122c ground terminal.