Metris AC Extreme is new-age completion pressure and temperature gauge capable of operating up to 20 years under 16 ksi pressure and 150 ºC temperature magnitudes in the downhole well production environment. To fulfil the functionality requirements of the electronics while exposed to vibration levels in the given operating limits, the gauge needs to pass a list of tests according to the API 19E standard. The present article deals with the experimental and modeling approach implemented to reach the vibration testing objective set by this standard. A preliminary random vibration experimental testing including a sine sweep analysis and a spectrum analysis conducted on the gauge provides unsatisfactory results. A preliminary semi-analytical study followed by a combined modal analysis and random vibration finite element analysis is performed to verify the potential impact of three parameters on the response spectrum of the virtual sensor locations in the assembly. The three parameters include the support plate material, the extension of bonded contact between the support plate and the shaker tool and, the extension of the number of grub screws between the gauge tool and the support plate. The combined experimental and simulation methodology put in place allows for a satisfied validation of the tool according to the standard requirements. This will aid in the commercialization and eventual integration of the tool in complex operating environments.