Vginet; Testing; Capillary Testing - Thermo Scientific Prima PRO User Manual

Capillary Testing

Thermo Fisher Scientific
The red LED adjacent to the VGiNET sockets (D3) indicates data

VGiNet

received by the unit (not necessarily for it or processed by it) and the
green LED (D4) indicates data transmitted from it. When the unit
detects a message intended for it, it will respond with a reply
message and so a full message cycle will appear as a red flash
followed quickly by a green flash as the reply is transmitted.

Testing

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
heater before starting work). If any valves have been stripped down,
or had parts replaced, the valve should be operated a number of times
before carrying out any test work.
Warning!



To test the micro capillary assembly, set the inlet to calibration mode
or power down the inlet by removing 24 V from the inlet controller
PCA. As noted above, either disconnect the mains heaters from the
PCA or switch off the inlet breaker on the mains distribution DIN
rail. Disconnect the transfer tube from the calibration manifold at the
CALIBRATION INLET fitting where it enters the solenoid
assembly. The micro capillary will now effectively be open to room
air. Select a suitable display mode in the system software (e.g.
Control Centre or MIM) and display the mass 32 peak or a
measurement of the mass 32 peak height. Make a note of the mass 32
peak height value (air).
If possible, helium should be used for the next step. Adjust the
cylinder regulator to give a gentle flow of helium at the open end of
the line (approximately 0.5 to 1.0 lmin
the CALIBRATION INLET fitting on the front panel of the solenoid
assembly. The mass 32 peak height reading should now drop as
helium passes over the micro capillary. The reading should change
by a factor of 10
It is advisable to switch off the manifold heater before
performing work on the assembly.
The manifold heaters are Mains voltages rated and should be
isolated from the inlet control PCA prior to exist in the
supply to the main heater.
The remainder of the inlet (including the capillary assembly
heater) is driven from a 24 Vdc supply.
-8
/pressure (air) within 7seconds, i.e. if the system
Prima PRO & Sentinel PRO Mass Spectrometers User Guide
Technical Description: Inlet
Solenoid Inlet
-1
) and connect the cylinder to
C-33