How to create a control chart to plot an attribute of a specified peak or remove a specified peak from a control chart - Tip266

OBJECTIVE or GOAL

Q: How do I create a control chart to plot an attribute of a specified peak or remove a specified peak from a control chart?

Great question. 

Let’s get started.

ENVIRONMENT

• Empower
• Empower Tip of the Week #266

PROCEDURE

STEP 1
In this example, we have a Control Chart to track retention time of peaks throughout a sample set. Acetone is a void volume marker and we do not want it included in the Control Chart (figure 1).
 

STEP 2
In the properties of the summary plot, we cannot create a peak level filter (figure 2).

STEP 3
If we add a white rectangle to the report and group it with the summary report, the composite group will allow us to create a peak level filter. Add the white rectangle to the report (figure 3).

STEP 4
Control click both groups and from the Edit menu, select ‘Group’ (figure 4).

STEP 5
From the Edit menu, select ‘Composite Properties’ (figure 5). 

STEP 6
We can filter using a peak field (figure 6) 

STEP 7
Create the condition to filter out the Acetone peak (figure 7). 

STEP 8
Acetone has now been filtered out of the control chart (figure 8). 

 

ADDITIONAL INFORMATION

Final Note: This can be done with either the Pro or QuickStart interface.