Gas
Control System
PlasmaQuant MS Series
54
5.5.8
Igniter Assembly
Figure 5-21 - Igniter assembly
1.
Remove covers as outlined in section 5.5.1, page 47 to reach gas box assembly.
2.
Remove 4 screws from metal panel in front of igniter, and remove the panel.
3.
Remove the plasma gas tubing from the barbed fitting within the RF compartment.
4.
Remove 3 screws securing igniter (located within RF compartment).
5.
Disconnect plasma gas tubing and electrical connections from igniter assembly,
and remove the assembly.
NOTE
Clearly mark each cable, or take a photo before removing for easy identification.
Sheath and nebulizer MFCs are NOT interchangeable with nitrox MFC.
To replace the assembly, use the same procedures in reverse.
5.5.9
Checking Sheath Gas Flow (MFC2)
1.
Connect a 0–4 L/min rotameter to the sheath gas outlet (upper outlet) on the
lower-front panel of the gas box.
2.
In the software, go to the diagnostics module and select the Plasma Status/Control
page.
3.
Check that the sheath gas flows are within tolerance. (0–1.5 L/min—increment of
0.1 L/min). The gas flows should be within ±10% of the desired flow.
4.
The sheath gas flows cannot be recalibrated. A mass flow controller device controls
these flows. If the flow rates for the sheath gas are incorrect, replace the mass flow
controller.