ISO 16063-16:2014

INTERNATIONAL ISO
STANDARD 16063-16
First edition
2014-06-01
Corrected version
2015-05-01
Methods for the calibration of
vibration and shock transducers —
Part 16:
Calibration by Earth’s gravitation
Méthodes pour l’étalonnage des transducteurs de vibrations et de
chocs —
Partie 16: Étalonnage par gravitation tellurique
Reference number
ISO 16063-16:2014(E)
©
ISO 2014

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ISO 16063-16:2014(E)

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ISO 16063-16:2014(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Uncertainty of measurement . 1
4 Requirements for apparatus and other conditions . 2
4.1 General . 2
4.2 Environmental conditions . 2
4.3 Mounting platform . 2
4.4 Accelerometer output measuring instrumentation . 3
4.5 Earth’s gravitation . 3
5 Method . 3
5.1 General . 3
5.2 Test procedure for 0° and 180° . 4
5.3 Test procedure for fractions of gravitation . 4
5.4 DC offset consideration . 5
5.5 Calibration setup . 6
6 Report of calibration results . 8
Annex A (normative) Uncertainty components in the calibration by gravitation.9
Bibliography .11
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ISO 16063-16:2014(E)

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
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
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any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
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assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 108, Mechanical vibration, shock and condition
monitoring, Subcommittee SC 3, Use and calibration of vibration and shock measuring instruments.
This first edition of ISO 16063-16 cancels and replaces the first edition of ISO 5347-5:1993, which has
been technically revised.
This corrected version of ISO 16063-16:2014 incorporates the following corrections:
— Table 1, last row, + sign added before 240°
— Paragraph 2, after Formula (2), k = 1 changed to k = 2 and the uncertainty value adapted.
— Formula (5) has been corrected, and a degree sign has been added after 180 in the explanation.
— Formula (7) has been corrected, and in the explanation, the superfluous rows for a and a have
α0 α180
been removed.
— In Figure 1, the equal sign has been removed.
— Keys have been added under Figures 2 and 3.
— In Formula (A.2), the 8 above the summation sign has been removed.
— In the explanation to Formula (A.2), u has been replaced by u(x ).
i i
— In Formula (A.3) and in its explanation, u(e ) has been replaced by u(a ).
g g
— In addition, the following list of parts has been updated:
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
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ISO 16063-16:2014(E)

— 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 16: Calibration by Earth’s gravitation
— 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 32: Resonance testing — Testing the frequency and the phase response of accelerometers by means
of shock excitation
— Part 41: Calibration of laser vibrometers
— Part 42: Calibration of seismometers with high accuracy using acceleration of gravity
— Part 43: Calibration of accelerometers by model-based parameter identification
The following parts are under preparation:
— Part 17: Primary calibration by centrifuge
— Part 33: Testing of magnetic field sensitivity
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INTERNATIONAL STANDARD ISO 16063-16:2014(E)
Methods for the calibration of vibration and shock
transducers —
Part 16:
Calibration by Earth’s gravitation
1 Scope
This part of ISO 16063 specifies the instrumentation and procedure to be used for performing primary
calibration of accelerometers using Earth’s gravitation. It is applicable to rectilinear accelerometers
with DC (zero hertz frequency) response, such as straingauge, piezoresistive, variable capacitance, and
servo accelerometer types.
This part of ISO 16063 is applicable to the calibration of the magnitude of the sensitivity, referenced to
the acceleration due to the local gravitation at 0 Hz.
With the use of appropriate calibration equipment, this part of ISO 16063 can be applied to the
calibration of the magnitude of the sensitivity, referenced to fractional parts of the acceleration due to
the local gravitation at 0 Hz. The specification of the instrumentation used contains requirements on
environmental conditions, as well as specific requirements for the apparatus to be used.
The sensitivity obtained using this part of the ISO 16063 standard for accelerometers with a DC response
can be used over the flat part of the low-frequency range of the accelerometer. The degree of flatness of the
applicable frequency range is intended to be taken into account in the uncertainty of measurement (UoM).
This part of ISO 16063 is applicable to reference standard accelerometers and working standard
accelerometers, as well as complete acceleration measurement chain (accelerometer complete with
amplifier and readout unit).
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 16063-1, Methods for the calibration of vibration and shock transducers — Part 1: Basic concepts
3 Uncertainty of measurement
All users of this part of ISO 16063 are expected to make an uncertainty budget according to Annex A in
order for them to document their UoM estimation. A calibration arrangement example is given in order
to help set up systems that fulfil different uncertainty requirements.
When the local value of acceleration due to gravitation, g , is known and used, an UoM of 0,1 % can be obtained.
l
When the local value of acceleration due to gravitation, g , is not known and the standard acceleration
l
due to gravitation, g , is used (ignoring the influence of latitude and altitude), an UoM of 0,5 % can
n
be obtained. This estimation is assuming a value for the acceleration due to Earth’s gravitation of
2 2
9,806 65 m/s ± 0,026 m/s .
The uncertainty limits mentioned in this clause are applicable to devices with a maximum transverse
sensitivity of 5 %.
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ISO 16063-16:2014(E)

A more detailed description of the uncertainty components is given in Annex A.
The uncertainty of measurement is expressed as the expanded measurement uncertainty in accordance
with ISO 16063-1 (referred to in short as uncertainty).
4 Requirements for apparatus and other conditions
4.1 General
This clause gives recommended specifications for the apparatus necessary to fulfil the scope of Clause 1 and
to obtain the uncertainties of Clause 3, if the recommended specifications listed below are met for each item.
It is mandatory to document the expanded uncertainty using the methods of Annex A.
4.2 Environmental conditions
The calibration shall be carried out under the following ambient conditions:
a) room temperature: (23 ± 3) °C;
b) relative humidity: maximum 75 % RH.
Care shall be taken that external vibration and noise do not affect the quality of the measurements.
4.3 Mounting platform
The mounting platform shall be arranged so that it is possible to rotate and align the geometric
axis of sensitivity of the accelerom
...