Hardware manual

Startup, Shutdown and Status 3
Agilent 7500 Series ICP-MS Hardware Manual 3-7
Starting from Standby Mode
The following instructions assume that the instrument is in Standby mode
and the analyzer vacuum chamber is evacuated to a partial or high vacuum.
See “Starting from Shutdown Mode” to evacuate the vacuum chamber.
The plasma is off when the Agilent 7500 is in Standby mode. At this point the
Plasma can be switched on. Once the interface vacuum has reached 4.5 x 10
2
Pa and the plasma is on, the instrument will switch to Analysis mode and you
can perform tuning and sample analysis. To start the instrument from
Standby mode, complete the following steps:
1 Ensure that the instrument is in Standby mode.
The title bar shows that the instrument is in the Shutdown mode. Also the
LED on the top cover displays an orange light. (A blinking orange LED
indicates that the mode is changing).
2 Close the hoods.
Close both hoods tightly. The safety function is tripped if either hood is
open. The plasma will not ignite and go to analysis mode if the covers are
open.
3 Ensure that the vent air flow is acceptable.
The exhaust air flow should be 7
~
8 m
3
/min for the 7500ce/cs (with option
duct which is standard on 7500cs) or 4
~
6 m
3
/min for the 7500a/cx (without
optional duct). See Chapter 2, “Precautions” for information on “Checking
the Exhaust System”.
4 Supply the instrument with cooling water and argon gas.
The cooling water chiller must be turned on.
The primary argon gas pressure should be:
100 ± 2.8 psi (700 ± 20 kPa),
5 Ensure that the drain vessel is empty.
See Chapter 2, “Precautions”, for information on emptying the drain vessel.
6 Ensure that the gas tubing is not pinched and that the torch box and
sample introduction gas connections seal correctly.
Check the gas tubing and make adjustments if necessary. See Chapter 4,
“Maintenance” for information on connecting the gas hoses.
7 Ensure that all peristaltic pump (peripump) tubes are in good condition
and correctly clamped into the peristaltic pumps.