Hardware manual

4-58 Agilent 7500 Series ICP-MS Hardware Manual
4Maintenance
Testing the Torch
Perform the basic test after maintenance. See “Testing After Maintenance” at
the end of this chapter. When the plasma is ignited, observe it through the
tinted (UV protection) window to check the shape of the flame. If the gas
pressures are too low, put the instrument in standby move and wait 10
minutes before checking the connections for leaks.
Adjusting the Position of the Work Coil
The position of the work coil can be checked with the alignment plate (plastic
plate) in the following way.
Figure 61
Cleaning the RF Return strip and Torch Box Area
With the Torch Box in its back position, wipe both the RF Return Strip located
on the Torch Box and the area on the Interface where the RF return contacts
with a laboratory tissue wetted with pure water. This insures a good RF
contact during operation.
Alignment Plate
Inside surface of
the torch box
2) The Alignment plate
must be touching the
torch box as shown.
1) The four turn of the work coil
must fit within the Alignment
plate. The space between the
turns should be equal.
CAUTION
Replacement is necessary for badly eroded parts.