FAQ: Why does my instrument return zero as the serial number?

If your instrument returns zero as the serial number, it means that the interface card has been replaced but has not been properly initialized. Return the unit for service.

Contact Keysight Technologies at: https://service.keysight.com/infoline/public/product-service-query.aspx?PRODUCT_NO

Applies to: 66309B, 66311B, 66312A, 66319B, 66319D, 66321B, 66321D, 66332A

Applies to: 14565B, 14565U

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