Technical Description: Inlet
Rapid Multi-Stream Sampler
C-12
Prima PRO & Sentinel PRO Mass Spectrometers User Guide
Thermo Fisher Scientific
Testing of the inlet system may be required in order to confirm
correct performance, in the event of unexpected analytical results,
suspected contamination, or following a major service. The areas to
be checked are as follows. It is advisable to switch off the inlet
heaters before starting any work.
Caution!
Before starting any work, switch off all gas lines.
If required, the system should be purged with a suitable inert,
safe gas and the system exhaust isolated.
It is the responsibility of the user to assess the hazard
involved in breaking into any gas handling part of the system.
Inlet Alignment
Remove the stator cover from the RMS body.
Warning!
Moving mechanical parts exposed. Movement could start
unexpectedly.
Hot surfaces. Check RMS temperature settings before starting
work. Adjust as required.
Select a port using GasWorks (
Control Centre > Analogue
Scan
, etc.). Check that the sample arm moves to the correct
physical port and check that the sample arm is aligned over that
port. It should be (visually) equally spaced between the two
adjacent ports. A slight misalignment can be corrected by
loosening the four screws retaining the sample arm to the main
shaft and moving the arm to the correct position before re-
tightening. Check several ports, including #1, in this way.
The probability of the inlet operating with no reported errors but
giving significant mechanical misalignment is extremely low as
all parts are mechanically keyed together. Check that the main
pulley is secure on the drive shaft and that the sample arm is
aligned with the position #1 cutout on the encoder disc (incorrect
reassembly after servicing could result in 90°, 180°, or 270°
misalignment).
If the controller reports positional errors, check if position #1 can
be located correctly. If it can, but subsequent inlets are showing
Inlet Testing
Functional Testing
