ISO 16063-42:2014

DRAFT INTERNATIONAL STANDARD ISO/DIS 16063-42
ISO/TC 108/SC 3 Secretariat: DS
Voting begins on Voting terminates on

2013-05-20 2013-08-20
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION  •  МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ  •  ORGANISATION INTERNATIONALE DE NORMALISATION


Methods for the calibration of vibration and shock
transducers —
Part 42:
Calibration of seismometers with high accuracy using
acceleration of gravity
Méthodes pour l'étalonnage des transducteurs de vibrations et de chocs —
Partie 42: Étalonnage des diomomètres de haute exactitude utilisant l'accélération due à la pesanteur

ICS 17.160









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©  International Organization for Standardization, 2013

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ISO/DIS 16063-42

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ISO/DIS 16063-42
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Traceability of measurement.2
4 Determination of local gravity.2
4.1 Method using gravitational acceleration standardization network.2
4.2 Method using gravitational acceleration standardization network and relative gravimeter .2
4.3 Method using absolute gravimeter.2
5 Requirements for apparatus and environmental conditions.3
5.1 Calibration environment .3
5.2 Base and vibration environment (seismic block for calibration apparatus).3
5.3 Voltage-measuring instrumentation.3
5.4 Tunable low-pass filter.3
5.5 Power supply .3
5.6 Tilt table.3
6 Method.3
6.1 Calibration principle.3
6.2 Calibration procedure .4
7 Expression of results.5
Annex A (normative)  Expression of uncertainty of measurement in calibration.7
Annex B (informative) Traceablity of calibration measurement of seismometer.8
Bibliography.9

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ISO/DIS 16063-42
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 16063-42 was prepared by Technical Committee ISO/TC 108, Mechanical vibration, shock and condition
monitoring, Subcommittee SC 3, Use and calibration of vibration and shock measuring instruments.
ISO 16063 consists of the following parts, under the general title Methods for the calibration of vibration and
shock transducers:
 Part 1: Basic concepts
 Part 11: Primary vibration calibration by laser interferometry
 Part 12: Primary vibration calibration by the reciprocity method
 Part 13: Primary shock calibration using laser interferometry
 Part 15: Primary angular vibration calibration by laser interferometry
 Part 21: Vibration calibration by comparison to a reference transducer
 Part 22: Shock calibration by comparison to a reference transducer
 Part 31: Testing of transverse vibration sensitivity
 Part 41: Calibration of laser vibrometers
The following parts are under preparation:
 Part 16: Calibration by Earth's graviation
 Part 32: Resonance testing – Testing the frequency and the phase response of accelerometers by means
of its excitation



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DRAFT INTERNATIONAL STANDARD ISO/DIS 16063-42

Methods for the calibration of vibration and shock
transducers — Part 42: Calibration of seismometers with high
accuracy using acceleration of gravity
1 Scope
This International Standard prescribes 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.
This International Standard should generally apply to a servo-type accelerometer with/without a velocity output,
as 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 described in this International Standard enables the users to obtain static sensitivity for the
-5 2
seismometers up to 10 m/s (which corresponds to 1 mGal and approximately 1 ppm of the gravitational
acceleration).
-6
The combined and expanded (k=2) uncertainty of applied acceleration achieved by these methods is 10
2
m/s (0,1 mGal). When the absolute gravimeter described in this document is used, the uncertainty of applied
-8 2
acceleration can be suppressed to 5 x 10 m/s (5 μGal). The relative uncertainty of calibration, excluding the
uncertainty due to the device under test (DUT), is 0,5 %.
The intended end-usage of the seismometer to be applied in this standard is as follows.
a) Measurement and observation for the earth science including geophysics usage;
b) Measurement and observation for the disaster prevention, such as detecting the precursor of a land slide;
c) Diagnosis for the soundness of a building structure and foundation soil in the civil engineering;
d) Observation for nuclear-test detection.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 5347-5:1993, Methods for the calibration of vibration and shock pick-ups – Part 5: Calibration by Earth’s
gravitation
ISO/IEC Guide 98-3, Uncertainty of measurement – Part 3: Guide to the expression of uncertainty in
1)
measurement (GUM:1995)

1) ISO/IEC Guide 98-3 is published as a reissue of the Guide to the expression of uncertainty in measurement (GUM),
1995.
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ISO/DIS 16063-42
International Gravity Standardization Network-1971 (IGSN-71) (Morelli, 1974) Morelli, Carlo, ed., 1974, The
International Gravity Standardization Net 1971: International Association of Geodesy Special Publication No. 4,
194p.
3 Traceability of measurement
The traceability of measurement in this method is shown in Annex A and Annex B.
4 Determination of local gravity
4.1 Method using gravitational acceleration standardization network
Correct the latitude and altitude
...