Patent ID: 11899002
Assignee: NGK INSULATORS, LTD.
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 16:
17. The method for controlling operation of said gas sensor according to claim 16, wherein
said concentration of NOx in said measurement gas is measured by said gas sensor in a steady state of operation, said steady state of operation being a state in which said sensor element is maintained at said element driving temperature by being heated by said heater part, and oxygen partial pressure in said region that said first electrode faces in said at least one pump cell is maintained at or below a predetermined value,
said method further includes
c) causing said gas sensor to transition from a non-steady state of operation to said steady state of operation, said step c) including:
c-1) raising temperature of said sensor element to said element driving temperature using said heater part; and
c-2) pumping out oxygen from said region using said at least one pump cell during said step c-1), and

said first diagnosis and said second diagnosis in said step b) are made during said step c).