Hardware manual

4-136 Agilent 7500 Series ICP-MS Hardware Manual
4Maintenance
Dead Time Calibration
This section describes how to execute the Dead Time Calibration using an
erbium (Er) solution. Indium (In) is also available for dead time calibration.
To execute Dead Time calibration, follow the next procedure.
1 Perform a new EM and Adjust Discriminator tune.
2 Prepare the calibration standard solution for Dead Time Calibration.
For example, 50ppb Er and 1ppm Er.
3 Select the Use Dead Time Calibration in the ICP- MS Configuration
dialog box. The ICP- MS configuration dialog box is displayed by
selecting Start >> All Programs >> ICP- MS MassHunter Workstation (or
ICP- MS Chemstation) >> Configuration >> Miscellaneous.
Figure 111 ICP-MS Configuration Window
NOTE
Dead time calibration must be performed after replacement of the electron multiplier.