How nominal country voltage setting is possible if firmware update process does not perform well

Hello All

I had a problem of temperature sheath gas of AJS ion source not controlled properly.

I thought that Temperature was not controlled properly  due to nominal country voltage was not possible to set during firm ware update. The default one may be different from the actual.

How can I set  this nominal country voltage if firmware update was not supported for Mass hunter ver 10. & 6495C LC MS

Regards

Yitna Zewdie 

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