Hardware manual

4-128 Agilent 7500 Series ICP-MS Hardware Manual
4Maintenance
•Optional Gas: Optional gas flow rate setting. Enter the flow rate value in
the text box and click the Enter button.
H
2
gas is optional for the 7500cx. If an H
2
gas line is not connected,
H
2
- gas- related items are grayed out and cannot be selected.
•Input: Current value of the parameter related to vacuum and gas flow.
• Close: Close Reaction Gas Line Maintenance dialog box. All Reaction Gas
flow is set to 0 when this window is closed.
The maximum flow rate of each gas is as follows:
• H
2
gas: 7.0 (mL/min)
• He gas: 10.0 (mL/min)
• Optional gas: 100.0 (%)
Testing the Lenses
After you are finished servicing the Agilent 7500cs/cx, perform the basic test.
See “Testing After Maintenance” on page 4- 152, found at the end of this
chapter.
If the analyzer chamber does not achieve the appropriate vacuum pressure (<
6 x 10
-4
Pa), check to make sure the lens is securely sealed to the vacuum
chamber.
NOTE
Optional Gas is available when the optional gas line is installed.
CAUTION
Excessive amounts of reaction gas raises the pressure in the vacuum chamber and the
instrument safety feature will put the instrument in to shutdown mode. When
introducing the reaction gas, increase the gas flow rate gradually maintaining a good
operating vacuum pressure.