ISO 16063-34:2019

INTERNATIONAL ISO
STANDARD 16063-34
First edition
2019-12
Methods for the calibration of
vibration and shock transducers —
Part 34:
Testing of sensitivity at fixed
temperatures
Méthodes pour l'étalonnage des transducteurs de vibrations et de
chocs —
Partie 34: Essai de sensibilité à des températures fixes
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Uncertainty of measurement . 2
5 Ambient conditions . 3
6 Apparatus . 3
7 Method 1: Determination of complex sensitivity using a laser interferometer .4
7.1 General . 4
7.2 Method . 5
7.2.1 Test procedure . 5
7.2.2 Expression of results . 5
8 Method 2: Determination of complex sensitivity using a reference transducer
inside a temperature chamber . 6
8.1 General . 6
8.2 Method . 6
8.2.1 Test procedure . 6
8.2.2 Expression of results . 7
9 Method 3: Determination of complex sensitivity using a reference transducer
outside the temperature chamber . 7
9.1 General . 7
9.2 Method . 8
9.2.1 Test procedure . 8
9.2.2 Expression of results . 9
10 Preferred amplitudes, frequencies and temperatures . 9
11 Test report .10
Annex A (informative) Determination of the achieving time of setpoint temperature for a
device under test .12
Annex B (informative) Evaluating uncertainty caused by temperature tolerance .14
Bibliography .16
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
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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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World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 108, Mechanical vibration, shock and
condition monitoring.
This first edition of ISO 16063-34 cancels and replaces ISO 5347-17:1993, which has been technically
revised. The main changes are as follows:
— a method for the determination of complex sensitivity using a laser interferometer has been added;
— a method for the determination of complex sensitivity using a reference transducer inside the
temperature chamber has been added;
— a procedure for testing phase changes has been added;
— Annex A for the determination of the achievement time of the setpoint temperature for the device
under test has been added;
— Annex B for the evaluating uncertainty caused by temperature tolerance has been added.
A list of all parts in the ISO 16063 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2019 – All rights reserved

Introduction
The purpose of this document is to establish the procedures for testing the complex sensitivity of
vibration transducers at fixed temperatures in the temperature range from –190 °C to 800 °C and
frequency range from 10 Hz to 3 kHz.
The three methods described in this document allow the determination of the complex sensitivity or
temperature response of complex sensitivity of a transducer to sinusoidal vibration in the temperature
chamber.
Principles, procedures, and uncertainties of calibrations such as a comparison to a reference transducer
or an absolute measurement by laser interferometer are given in this document. Calibrations are
carried out using one of the three methods, depending on the different principles to be used and the
temperature and frequency range limitations.
INTERNATIONAL STANDARD ISO 16063-34:2019(E)
Methods for the calibration of vibration and shock
transducers —
Part 34:
Testing of sensitivity at fixed temperatures
1 Scope
This document details specifications for the instrumentation and methods to be used for testing fixed
temperature sensitivity of vibration transducers. It applies to rectilinear velocity and acceleration
transducers.
The methods specified use both a comparison to a reference transducer and an absolute measurement
by laser interferometer.
This document is applicable for a frequency range from 10 Hz to 3 kHz (method-dependent), a dynamic
2 2
range from 1 m/s to 100 m/s (frequency-dependent) and a temperature range from –190 °C to 800 °C
(method-dependent). Although it is possible to achieve these ranges among all the described systems,
generally each has limitations within them.
Method 1 (using a laser interferometer) is applicable to magnitude of sensitivity and phase calibration
in the frequency range 10 Hz to 3 kHz at fixed temperatures (see Clause 7). Method 2 (using a reference
transducer inside a chamber whose temperature limit is –70 °C to 500 °C) can be used for magnitude
of sensitivity and phase calibration in the frequency range 10 Hz to 1 kHz at fixed temperatures (see
Clause 8). Method 3 (using a reference transducer outside the chamber) can only be used for the
determination of the temperature response of complex sensitivity over a certain temperature range
(see Clause 9).
NOTE Method 1 and Method 2 can provide the deviation of complex sensitivity over a certain temperature
range if the calibration is also done at the reference temperature (room temperature 23 °C ± 5 °C).
To ensure the consistency of the use and test condition, the transducer, its cable and the conditioning
amplifier are intended to be considered as a single unit and tested together.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2041, Mechanical vibration, shock and condition monitoring — Vocabulary
ISO 16063-11:1999, Methods for the calibration of vibration and shock transducers — Part 11: Primary
vibration calibration by laser interferometry
ISO 16063-21:2003, Methods for the calibration of vibration and shock transducers — Part 21: Vibration
calibration by comparison to a reference transducer
3 Terms and definitions
For the purpose of this document, the terms and definitions given in ISO 2041 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp/
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
temperature response
sensitivity of the transducer at a given frequency as a function of its steady-state temperature
Note 1 to entry: Temperature response is measured at specified frequencies within the rated frequency range of
the transducer.
Note 2 to entry: In general, the sensitivity is a complex-valued function quantity and can be expressed in terms of
its magnitude and phase.
4 Uncertainty of measurement
The limits of the uncertainty of measurement in terms of expanded uncertainty applicable to this
document are as follows.
a) For the magnitude of sensitivity:
— when using a laser interferometer (Method 1): 0,5 % of the measured value at reference
conditions; 1 % of the measured value outside reference conditions,
— when using a reference transducer (Method 2): 1 % of the measured value at reference
conditions; 2 % of the measured value outside reference conditions,
— when using a reference transducer (Method 3): 2 % of the measured value at reference
conditions; 3 % of the measured value outside reference conditions.
b) For the phase shift of sensitivity:
— when using a laser interferometer (Method 1): 0,5° at reference conditions; 1° outside reference
conditions,
— when using a reference transducer (Method 2): 1° at reference conditions; 2,5° outside reference
conditions,
— when using a reference transducer (Method 3): 2° at reference conditions; 3° outside reference
conditions.
c) Recommended reference conditions are as follows:
— frequency f = 160, 80, 40 or 16 Hz (or angular frequency ω = 1 000 rad/s, 500 rad/s, 250 rad/s
or 100 rad/s),
2 2 2 2
— acceleration (acceleration amplitude or RMS value): 50 m/s , 20 m/s , 10 m/s or 5 m/s .
NOTE In practice, these limits can be exceeded depending on the vibratory characteristics of the fixture on
the exciter; higher uncertainty values are accepted at some frequencies according to use requirements.
To undertake measurements over the proposed temperature range in supporting uncertainty budgets
for transverse, bending, rocking accelerations, hum and noise, and relative motion issues, those
measurements should be done at room temperature because the selected ceramic rod shall be rigid
throughout the proposed temperature range.
The uncertainty of measurement shall be assessed and reported according to ISO 16063-11:1999,
Annex A, and ISO 16063-21:2003, Annex A, to document the level of uncertainty expressed as expanded
uncertainties for a coverage factor of 2 or a confidence probability of 95 %. It is the responsibility of the
laboratory or end user to make sure that the reported values of expanded uncertainty are credible.
2 © ISO 2019 – All rights reserved

5 Ambient conditions
Calibration shall be carried out under the following ambient conditions:
a) room temperature, (23 ± 5) °C;
b) relative humidity, 75 % max.
6 Apparatus
The usual laboratory apparatus and, in particular, the following.
6.1 Vibration exciter.
Orientated vertically or horizontally, the vibrator exciter shall be used to cover the requested frequency
and dynamic ranges.
6.2 Fixture.
Made of machinable ceramics, the fixture shall have low thermal conductivity and high stiffness. By
mounting the tested transducer on the top of a ceramic rod, the rod protrudes into the temperature
chamber from a vibration exciter on which it is placed. To reflect the laser, the surface of the mounting
transducer should be optically polished, covered by a mirror, or be plated with chrome, or as adequate.
6.3 Temperature chamber.
The chamber should have a temperature range from –190 °C to 800 °C and should be specially designed
so that the air temperature in the working space (the part of the chamber in which the device under test
[DUT] can be maintained within the specified temperature tolerances) evenly achieves temperature
uniformity within ±2 °C at fixed temperatures. At the top of the chamber, a hole should be sealed with
glass, so that the laser passes through. An additional aperture on the side of the chamber is required to
enable cables to be fed from the transducer under test to the external conditioning amplifier. A suitable
sealing arrangement needs to be provided to maintain the chamber temperature. The design of the
equipment shall also take into consideration the clamping of the transducer cables to reduce cable
strain and flap. The indicated temperature range and temperature uniformity within ±2 °C are not
mandatory. The chamber shall cover the required temperature range. Temperature uniformity within
±2 °C is recommended in some cases.
6.4 Temperature sensor.
The air temperature in the chamber is measured and controlled by a temperature sensor located
close to the transducer under test. The location of the temperature sensor has no influence on the
mounting and vibration of the transducer. Beside the control sensor, a second measurement sensor
for temperature should be introduced; at least thermal stability of the air in the temperature chamber
should be monitored separately.
6.5 Interferometer.
Refer to ISO 16063-11:1999, 3.6.
6.6 Reference transducer.
Together with the conditioning amplifier, the reference transducer should be calibrated according to
Clause 7 with documented uncertainty (for Method 2) and calibrated by primary or comparison means
with documented uncertainty (for Method 3). For Method 3, the temperature influe
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