Hardware manual

Maintenance 4
Agilent 7500 Series ICP-MS Hardware Manual 4-135
Adjustment Procedure after Replacing the EM
After replacing the EM, put the instrument into Analysis mode and adjust the
discriminator and EM voltage.
To adjust the EM, complete the following steps:
1 Put the instrument into Analysis mode.
2 Set the EM voltage (Analog HV, Pulse HV) to the appropriate value as
shown below.
• Analog HV: 1800 V
• Pulse HV: 900 V
Select Instrument>>Tuning from the Top menu to display the tuning
window.
Set 1800 Volt for Analog HV and 900 Volt for Pulse HV in the tuning
parameters
3 Using the Autotune, adjust the discriminator and EM voltage.
Refer to the ‘Tuning’ chapter in the Agilent 7500 Series ICP- MS Tuning
and Application Handbook to adjust the discriminator and EM voltage
using the Autotune.
NOTE
The P/A Factor adjustment must be performed after EM tuning.