Delete Chart Series if exists

I have surprising problem:

When I am using the following code to create new chart:

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Sometimes immediately after this command, it is adding Series1 and sometimes it is not adding any Sereis..So I am adding new series using the following commands:

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I am giving name to series using the above command. But problem is if it is adding series 1 immediately after

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command, it still remains in the chart. So I would like to delete if this Series1 exists immediately after

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command.

Can any body help me on this?

Thanks in advance.

If the active cell is within data series will automatically be added.
To remove the series use,

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