Re: Speeding Ticket in Washington
If you also know the model and serial number, you can request a copy of the manual through an FOIA request. I sent mine to the City Clerk's office -- got a response in about a week. They can charge you for copying. Maintenance Certificates are usually on file at the court (see IRLJ 6.6 (d) and you should be able to get a copy from the Clerk of the Court.
In most jurisdictions, officers perform the calibration tests at the beginning and end of each shift -- but I've seen case law that states "before and after" the issuance of a citation. You could also interpret that as "immediately" before and after OR a week before and a week after. So, it's mostly in the eyes of the beholder.
Where am I going? And why am I in this handbasket?