INFICON STC-2000A Thin Film Deposition Controller Operating Manual - Manual (Page 143)

p
STC-2000A DEPOSITION CONTROLLER
y
Install the sensor so that the crystal opening is in a direct line with the evaporation source and well
within the evaporant stream. Ensure that the sensor is not shadowed by mechanical structures within the
vacuum system. The sensor should be held mechanically stable by attaching it to a mounting bracket via
the rear #4-40 tapped holes.
Water Lines
Bend the two sensor water lines into the desired position for connection to the vacuum
feedthrough. Take care not to crimp the lines. There are two methods for attaching the water lines to the
feedthrough. The first is to silver solder or TIG weld the sensor and water lines together. To do this first
locate the final position of the sensing head and feedthrough. Trim the 1/4" water lines on the feedthrough
to the desired length. Bend and fit the sensor water lines as required. Cut the 1/8" water lines to length
allowing 1/4" to 1/2" of extra length to be inserted into the 1/4" feedthrough water lines. Then braze, silver
solder, or TIG weld.
The second is to use Swagelok compression fittings. These are available from Sycon as part
number 022-001. These can also be purchased from Swagelok as part number SS-300-6-2.
Installing Compression Fittings
Swagelok ® Compression Fittings
Swagelok
® Tube fittings are installed in three easy steps:
Step 1-simply insert the tubing into the Swagelok ® tube fitting. Make sure that the tubing rests firmly on
the shoulder of the fitting and that the nut is finger tight.
Step 2-before tightening the Swagelok
® nut, scribe the nut at the 6 o'clock position.
Step 3-now, while holding the fitting body steady with a backup wrench, tighten the nut 3/4 of a turn.
Watch the scribe mark, and make 3/4 revolution to the 3 o'clock position.
By scribing the nut at the 6 o'clock position as it appears to you, there will be no doubt as to the starting
position. When tightened 3/4 of a turn to the 3 o'clock position you can easily see that the fitting has been
properly installed.
Re-Tightening Instructions
Re-Tightening Water Line Fittings
Connections can be disconnected and re-tightened many times. The same reliable, leak-proof seal
can be obtained every time the connection is remade. First tighten the nut by hand. Then rotate the nut to
the original position (scribe mark at 3 o'clock) with a wrench. An increase in resistance will be felt near
this point. Now tighten an additional 1/8 turn.
Vacuum Feedthrough
The vacuum feedthrough should be installed as close as practically possible to the sensor head.
This allows the shortest length of sensor-to-feedthrough coax cable to be used. Cable lengths greater than
30 inches may reduce crystal life and stability. Install the feedthrough using proper gaskets and vacuum
grease if needed. The small electrical coax connector should be on the vacuum side of the installation.
SECTION 4.XX page 143 of 292