ISO 16063-42:2014 PDF

Methods for the calibration of vibration and shock transducers — Part 42: Calibration of seismometers with high accuracy using acceleration of gravity

Название (английский):

ISO 16063-42:2014

Methods for the calibration of vibration and shock transducers — Part 42: Calibration of seismometers with high accuracy using acceleration of gravity

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 9
Дата публикации:: 4 июля 2014 г.
Издание:: ISO IS 16063 edition 1 version 1
ICS:: 17.160

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Описание (английский):

ISO 16063-42:2014 specifies the instrumentation and procedure to be used for the accurate calibration of seismometer sensitivity using local gravitational acceleration (local Earth's gravitation; local value for the acceleration due to the Earth's gravity) as a reference value. It is intended generally to be applied to a servo-type accelerometer with/without a velocity output, which usually has a mass position output in the category of a wide-band seismometer with a bandwidth from 0,003 Hz to 100 Hz. The method specified enables the user to obtain static sensitivity for the seismometers up to 10−5 m/s2 (which corresponds to 1 mGal and approximately 1 ppm of the gravitational acceleration). The intended end-usage of the seismometer to be applied is: a) measurement and observation for the earth science including geophysics usage; b) measurement and observation for disaster prevention, such as detecting the precursor of a land slide; c) diagnosis for the soundness of a building structure and foundation soil in civil engineering; d) observation for nuclear-test detection.

Технические детали

Технический комитет: ISO/TC 108 - Mechanical vibration, shock and condition monitoring
SKU: ISO 16063-42:2014

Abstract

Overview

ISO 16063-42:2014 defines a high-accuracy method for the calibration of seismometers using the local acceleration of gravity as the reference. The standard is aimed primarily at servo-type, wide-band seismometers (mass-position output, bandwidth ~0.003 Hz to 100 Hz) and enables determination of static sensitivity down to about 1 × 10−5 m/s² (1 mGal). It specifies instrumentation, environmental controls, calibration procedures, and the traceability routes needed to achieve internationally comparable sensitivity and uncertainty statements.

Key topics and technical requirements

Calibration principle: Use of a precision tilt table to apply known vertical/horizontal acceleration components derived from the local gravitational acceleration g (a_v = cosθ·g, a_h = sinθ·g). Seismometer outputs are measured at multiple tilt angles to solve for sensitivity and bias.
Traceability of g: Three accepted approaches:
- Use of the International Gravity Standardization Network (IGSN‑71) values corrected for latitude/altitude.
- Local measurement with a relative gravimeter tied to a reference point.
- Direct measurement with an absolute (free-fall) gravimeter (best uncertainty).
Achievable uncertainty:
- Typical combined expanded (k=2) uncertainty of applied acceleration: ~0.1 mGal (1×10−6 m/s²).
- With an absolute gravimeter: down to ~5 μGal (5×10−8 m/s²).
- Relative calibration uncertainty (excluding DUT): ~0.5%.
Environmental and apparatus requirements:
- Reference conditions: ~100 kPa, 50 % RH, 23 °C (monitor temperature and pressure).
- Rigid, heavy seismic block isolated from building motion.
- Voltmeter relative uncertainty ≤ 0.1 %.
- Tunable low-pass filter options: cut-offs 10, 30 (normal), 60 Hz; slope ≥ 24 dB/octave.
- Tilt table resolution ≤ 0.05° and uncertainty

Overview

Key topics and technical requirements

Calibration principle: Use of a precision tilt table to apply known vertical/horizontal acceleration components derived from the local gravitational acceleration g (a_v = cosθ·g, a_h = sinθ·g). Seismometer outputs are measured at multiple tilt angles to solve for sensitivity and bias.
Traceability of g: Three accepted approaches:
- Use of the International Gravity Standardization Network (IGSN‑71) values corrected for latitude/altitude.
- Local measurement with a relative gravimeter tied to a reference point.
- Direct measurement with an absolute (free-fall) gravimeter (best uncertainty).
Achievable uncertainty:
- Typical combined expanded (k=2) uncertainty of applied acceleration: ~0.1 mGal (1×10−6 m/s²).
- With an absolute gravimeter: down to ~5 μGal (5×10−8 m/s²).
- Relative calibration uncertainty (excluding DUT): ~0.5%.
Environmental and apparatus requirements:
- Reference conditions: ~100 kPa, 50 % RH, 23 °C (monitor temperature and pressure).
- Rigid, heavy seismic block isolated from building motion.
- Voltmeter relative uncertainty ≤ 0.1 %.
- Tunable low-pass filter options: cut-offs 10, 30 (normal), 60 Hz; slope ≥ 24 dB/octave.
- Tilt table resolution ≤ 0.05° and uncertainty

ISO 16063-42:2014 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

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