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Originally Posted by DaveASA/FED
Dakota,
what the heck this has already strayed WAY off course so I will keep going  . Also as an Engineer, if the device is calibrated at the required interval, determined by manufacturer and department (usually less time then previous, but if justified why longer it can be approved) and the device is still within its calibaration period then this practice should pass an audit. The tuning fork verification is just that a feel good, unofficial comparitive reference method to enable the departement to know if there is a reason to decrease the calibration interval on a certain device. Some could even use this as a "verify before use" type of calibration if the tuning fork was calibrated and tracable to NIST. not a recommended practice but could be done. |
I have no problem with the informal accuracy checks. His original post read like this was the only procedure they used unless the unit had to be sent back to the factory for repair or something. He clarified that this was not correct - they send them back for calibration on a set schedule. That is proper procedure if they do not have the capability in house to calibrate the gun (along with the personnel trained to do the calibration). I really have no idea how many (if any) police forces have their own metrology lab. We have a metrology lab here where I work where our test equipment is calibrated by trained technicians.