Sample Inlet - Thermo Scientific Prima PRO User Manual

Technical Description: Inlet
Solenoid Inlet
C-38 Prima PRO & Sentinel PRO Mass Spectrometers User Guide
The following description only applies to the six-way manifold

Sample Inlet

version of the solenoid inlet assembly. As this operation will require
the transfer line from the micro capillary to the inlet probe to be
disconnected, it will be necessary to shut down and vent the
instrument vacuum system.
1. Switch off the mains heater supply at the DIN rail mounted inlet
breaker.
2. Disconnect the heater, sensor, and valve cables from the inlet
controller PCA. Take carful note of cable / plug positions to aid
in reassembly.
3. Disconnect the transfer tube from the micro capillary assembly to
the mass spectrometer inlet probe assembly.
4. Disconnect the external sample gas line, calibration gas inlet, and
the exhaust line.
5. The assembly can now be removed from the system. Unscrew the
eight M6 nuts holding the mounting plate in place and carefully
remove from the enclosure.
6. To remove the exhaust manifold disconnect the 4 mm FEP tube
from the push in connector in the exhaust manifold block.
7. Unscrew the Exhaust fixing on the front panel. Retain the sealing
ring.
8. Unscrew the six screws below the manifold to release the
manifold from the valve assemblies. Take great care not to lose
the o-rings that are on both sides of the manifold.
9. Unscrew the knurled rings on the end of the solenoid coil
assemblies to release the coils and connection PCB. Remove to
expose the actuator assemblies.
10. To inspect individual valves unscrew the valve actuator from the
manifold using a suitable spanner. Take care to avoid dropping
the valve plunger / spring assembly as the actuator is withdrawn.
11. Inspect the valve parts, particularly the sealing surfaces, clean as
required, replacing any damaged seals.
Thermo Fisher Scientific