Stanford Research Systems RGA100, Operating Manual And Programming Reference

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1-10 Installation
SRS Residual Gas Analyzer
Procedure
1. Begin by inspecting the front panel of the ECU box. Use the following diagram as a
reference during installation.
WARNING
High Voltage inside
this unit. See manual for
safety notice.
WAR NIN G
High Voltage inside
this unit. See manual for
safety notice.
Clearance
holes
(6 places)
Internal connectors
Locking screws
(2 places)
Probe alignment holes
Figure 3 ECU Front Panel
2. Next, inspect the probe’’s feedthru flange:
Eight ceramic feedthru connectors on a 1”” diameter circle surround a center tube
terminated by a coaxial connector. Two alignment rods (1/4”” diameter) insure the
correct alignment of the ECU box to the probe during installation and two threaded
holes (1/4-28) line up with the locking screws of the ECU box.
3. Push the locking screws of the ECU box as far as they will go into the box.
4. Orient the ECU so that the two small alignment holes (1/4”” diameter) on its front
panel and the alignment rods of the flange line up. Note that there is only one correct
way to do this!
5. Slide the ECU into the probe using the alignment rods as a guide, and until physical
contact is made between the probe and the ECU’’s internal connectors.
6. Using gentle pressure on the back of the box, push the probe’’s conductors into the
ECU’’s connectors until the front surface of the ECU rests flat against the back of the
feedthru flange.
Warning:
The alignment of the probe/ECU connections is checked at the factory, for each
individual RGA system and only slight resistance should be experienced during this
step. If significant resistance is noted while sliding the ECU onto the probe do not
exert excessive force since that might damage the ceramic-to-metal seals of the