Hardware manual

5-52 Agilent 7500 Series ICP-MS Hardware Manual

5 Troubleshooting

Items to Be Checked in Analysis Mode

• Check to make sure that the torch is positioned correctly.

Using Autotune, adjust the torch vertical/horizontal position

• Check to make sure that the mass axis is adjusted correctly.

Using Autotune, adjust the Resolution/Axis.

• Execute the EM voltage adjustment.

Using the Autotune, adjust the EM/discriminator.

• Check to make sure that the lens is responding.

Check to make sure that the signal changes when the lens voltage is varied.

• Check to make sure that sensitivity is acceptable in no gas mode.

If the sensitivity is acceptable in no gas mode and it is too low in He or H

mode, the problem may be caused by the purity level of the reaction gas.

• Check the sensitivity with mass 76 in no gas mode.

cps

• Set the tuning parameter as they were when the sensitivity was normal;

then re- check the sensitivity.