Overview
ISO 5348:2021 - "Mechanical vibration and shock - Mechanical mounting of accelerometers" is an international standard that defines best practices and technical properties for mechanical mounting of contacting vibration transducers. It covers how different mounting methods affect an accelerometer’s frequency response and measurement fidelity. The standard applies to contacting accelerometers (both uniaxial and multi‑axial) and can also be applied to seismic velocity transducers. Its primary purpose is to help users estimate mounting limitations and potential measurement deviations caused by the mechanical coupling between transducer and structure.
Key topics and technical requirements
- Mounting methods and recommendations: practical guidance for a wide range of mounting types, including stud mounting, adhesive mounting, magnets, quick mounts, probes, conical bolting, three‑point supports, wedge anchors, and mounting fixtures.
- Frequency response and resonance: how mounting stiffness, damping and transducer mass influence usable frequency range, and procedures to determine the mounted fundamental resonance frequency.
- Manufacturer-specified characteristics: information that should be provided in transducer datasheets (e.g., frequency response under defined mounting conditions, mounting surface dimensions and finish, thread sizes and depths, recommended mounting torque).
- Mounting selection considerations: general and specific factors such as frequency range of operation, cable effects, and recommended test/installation procedures.
- Further mounting aspects: base strain sensitivity, thermal mounting effects, and electrical ground loops that can influence measurement quality.
- Scope limitations: the standard focuses on mechanical mounting; other disturbances (transverse movement, misalignment, base bending, temperature, cable whip, electromagnetic fields, mounting torque effects beyond mounting mechanics) are acknowledged but largely outside the document’s prescriptive scope.
Applications and who should use it
ISO 5348 is essential for:
- Vibration test engineers and laboratory technicians who mount accelerometers for modal testing, fatigue testing, or environmental vibration studies.
- Condition monitoring and predictive maintenance professionals who require reliable acceleration measurements on rotating machinery, structures, or vehicles.
- Metrology and calibration laboratories specifying mounting methods to meet declared frequency responses and measurement uncertainty.
- Sensor manufacturers and procurement specialists specifying mounting surfaces, threads, torque and product documentation to ensure consistent field performance.
Practical benefits include improved measurement fidelity, reduced high‑frequency errors, and clearer selection of mounting technique for a given frequency band or test condition.
Related standards
- ISO 2041 - vocabulary for mechanical vibration and shock
- ISO 8042 - characteristics to be specified for seismic pick‑ups
Keywords: accelerometer mounting, mechanical mounting, vibration transducers, frequency response, mounting methods, stud mounting, adhesive mounting, vibration measurement.
