Hardware manual

4-60 Agilent 7500 Series ICP-MS Hardware Manual
4Maintenance
Removing the ShieldTorch
To remove the shield torch, complete the following procedure:
1 Put the Agilent 7500 into Standby (or Shutdown) mode.
2 Open the torch box.
Open the cover, loosen the torch box screws and remove the torch box.
Remove the connection tube.
3 Remove the ball joint clamp and remove the transfer tube (connector
tube) from the spray chamber.
4 Remove the gas lines.
Carefully loosen and the plasma gas and auxiliary gas tube and remove
from the torch.
5 Remove the shield torch.
Open the torch holder clip (quick- release clamp), slide the shield torch with
the shield bar and bonnet still attached from the work coil, and remove the
torch. Be careful to ease the torch projection out of the torch stand hole
(refer to Figure 58).
WARNING
To avoid burns, wait 10 minutes after switching off the plasma before opening the
instrument. The plasma reaches temperatures as high as 8000 K.
CAUTION
• Completely wipe off spilled water or samples left in the torch box as they will cause
erosion.
• It may be difficult to ignite the plasma if the torch, torch stand, and around the torch
is stained.
CAUTION
When removing the torch, the bonnet may fall and break if the torch is not held level.
Hold the torch level while removing it, or hold the bonnet to prevent it from falling off
when removing the torch.