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Thermo Fisher Scientific

Autotune Failure: Failed Nebulizer Tuning Stage

Issue

Failed nebulizer tuning stage of SourceTune for STD (High Matrix) measurement mode

Environment

iCAP Qnova Series

Resolution

Increased limits of nebulizer tuning stages of SourceTune High Matrix autotune sequence by 1% (from 2.5% to 3.5% for first stage and 1.9% to 2.9% for final stage) to match the performance report specification for oxides which had been increased by 1% from factory specifications (2 to 3%).

Cause

The performance report specifications are sometimes modified to match the customer's application instead of the factory specifications which in practice is a great thing to do. However, oftentimes when this is done, the autotune is not adjusted to keep it in sync with the new performance report specifications. This causes the autotune to try an optimize to levels that are not needed to pass a performance report and in doing so a failure can be encountered during the autotune itself because of this.

 

 

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