SIST EN ISO 8041-2:2021

Human response to vibration - Measuring instrumentation - Part 2: Personal vibration exposure meters (ISO 8041-2:2021)

This document specifies minimum requirements for personal vibration exposure meters (PVEM).
This document is applicable to instruments designed for measurements of whole-body vibration in the context of industrial hygiene applications (according to ISO 2631-1, ISO 2631-2 and ISO 2631-4) and/or hand-arm vibration (according to ISO 5349-1) together with the associated exposure times.
This document provides specified design goals and permitted tolerances that define the minimum performance capabilities and functional requirements of instruments designed to measure personal daily vibration exposure.
This document does not apply to instruments designed to measure or log exposure times without also performing vibration measurement. Instrumentation of this type is described in ISO/TR 19664.

Schwingungseinwirkung auf den Menschen - Messeinrichtung - Teil 2: Messgeräte für die personenbezogene Schwingungseinwirkung (ISO 8041-2:2021)

Dieses Dokument legt Mindestanforderungen an Messgeräte für die personenbezogene Schwingungs-einwirkung fest.
Dieses Dokument ist anwendbar für Messeinrichtungen, die für die Messung von Ganzkörper-Schwingungen im Rahmen der Arbeitshygiene (nach ISO 2631 1, ISO 2631 2 und ISO 2631 4) und/oder Hand-Arm-Schwingungen (nach ISO 5349 1) zusammen mit den zugehörigen Expositionszeiten ausgelegt sind.
Dieses Dokument enthält Festlegungen zu Sollwerten und zulässigen Grenzabweichungen, die die Mindest-leistungsfähigkeit und die funktionellen Anforderungen von Messeinrichtungen zur Messung der täglichen personenbezogenen Schwingungseinwirkung festlegen.
Dieses Dokument ist nicht anzuwenden für Messeinrichtungen, die für die Messung oder Protokollierung der Einwirkungsdauer ausgelegt sind, ohne gleichzeitig eine Schwingungsmessung durchzuführen. Messeinrichtungen dieser Art werden in ISO/TR 19664 beschrieben.

Réponse des individus aux vibrations - Appareillage de mesure - Partie 2: Instrument de mesure de l'exposition des personnes aux vibrations (ISO 8041-2:2021)

Le présent document spécifie les exigences minimales applicables aux instruments de mesure de l’exposition des personnes aux vibrations (IMEPV).
Le présent document est applicable aux instruments conçus pour les mesurages des vibrations globales du corps dans le cadre des applications d’hygiène industrielle (conformément à l’ISO 2631-1, l’ISO 2631-2 et l’ISO 2631-4) et/ou des vibrations main-bras (conformément à l’ISO 5349-1) avec les durées d’exposition associées.
Le présent document fournit les objectifs de conception spécifiques et les tolérances admissibles qui définissent les capacités de performance minimales et les exigences fonctionnelles des instruments conçus pour mesurer l’exposition quotidienne des personnes aux vibrations.
Le présent document ne s’applique pas aux instruments conçus pour mesurer ou enregistrer les durées d’exposition sans réaliser également de mesurage des vibrations. Les instruments de ce genre sont décrits dans l’ISO/TR 19664.

Odzivanje človeka na vibracije - Merilni instrumentarij - 2. del: Osebni merilnik izpostavljenosti vibracijam (ISO 8041-2:2021)

General Information

• Status: Published
• Public Enquiry End Date: 01-Jun-2020
• Publication Date: 27-Jun-2021
• ICS: 13.160 - Vibration and shock with respect to human beings
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 17-Jun-2021
• Due Date: 22-Aug-2021
• Completion Date: 28-Jun-2021
• Ref Project: EN ISO 8041-2:2021 - Human response to vibration - Measuring instrumentation - Part 2: Personal vibration exposure meters (ISO 8041-2:2021)

Relations

• Replaces: SIST EN ISO 8041:2005/AC:2008 - Human response to vibration - Measuring instrumentation (ISO 8041:2005/Cor 1:2007)
• Effective Date: 16-Jun-2021
• Replaces: SIST EN ISO 8041:2005 - Human response to vibration - Measuring instrumentation (ISO 8041:2005)
• Effective Date: 16-Jun-2021
• Revised: SIST EN ISO 8041:2005 - Human response to vibration - Measuring instrumentation (ISO 8041:2005)
• Effective Date: 12-Jun-2019

Overview

SIST EN ISO 8041-2:2021 (ISO 8041-2:2021) defines the minimum requirements for Personal Vibration Exposure Meters (PVEM). It applies to instruments used to measure whole‑body vibration (per ISO 2631 series) and hand‑arm vibration (per ISO 5349‑1) in occupational hygiene contexts. The standard specifies design goals, permitted tolerances, performance capabilities and functional requirements for instruments that measure personal daily vibration exposure. It does not cover devices that only log exposure time without performing vibration measurement (see ISO/TR 19664).

Key topics and technical requirements

The document lays out comprehensive technical and functional criteria including:

• General performance specifications and reference environmental conditions for routine use and testing.
• Frequency weightings and frequency responses required for accurate representation of human response to vibration.
• Amplitude linearity, instrument noise, and signal‑burst response to ensure reliable measurements across expected ranges.
• Display, electrical outputs and time‑averaging (running RMS acceleration) for exposure calculation and reporting.
• Overload/under‑range indication, warning indications and clearance/reset functions to support safe and repeatable measurements.
• Transducer and mounting requirements, including environmental and electromagnetic immunity (temperature, ESD, RF, ingress protection).
• Logging capabilities, operator detection systems, contact force measurement (when relevant), and ergonomic/human‑interface aspects.
• Performance testing and pattern evaluation procedures for type approval and conformity assessment.

The standard also covers documentation, marking, provisions for auxiliary devices and testing requirements for pattern approval.

Practical applications

PVEMs meeting ISO 8041-2:2021 are used for:

• Occupational exposure assessments of employees operating vehicles, heavy machinery, handheld power tools or seating systems.
• Compliance verification against workplace vibration exposure limits and action values.
• Tool and equipment evaluation, maintenance planning and control‑measure effectiveness.
• Research and field studies on human response to vibration and ergonomic risk assessments.

Common use cases include monitoring daily vibration dose, comparing tools/equipment, and supporting health & safety programs in industries such as construction, forestry, mining, transportation and manufacturing.

Who should use this standard

• Instrument manufacturers and designers of personal vibration exposure meters (PVEM)
• Occupational hygienists, safety managers and ergonomists conducting exposure assessments
• Test laboratories and certification bodies performing pattern evaluation and compliance testing
• Employers and regulators defining measurement protocols and equipment procurement criteria

Related standards

• ISO 2631 series (whole‑body vibration assessment)
• ISO 5349‑1 (hand‑arm vibration measurement)
• ISO/TR 19664 (instruments that log exposure time only)
• EN ISO 8041:2005 (superseded by this edition)

Keywords: ISO 8041-2, SIST EN ISO 8041-2:2021, personal vibration exposure meters, PVEM, vibration measurement, whole-body vibration, hand-arm vibration, occupational hygiene, frequency weighting, RMS acceleration.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2021
Nadomešča:
SIST EN ISO 8041:2005
SIST EN ISO 8041:2005/AC:2008
Odzivanje človeka na vibracije - Merilni instrumentarij - 2. del: Osebni merilnik
izpostavljenosti vibracijam (ISO 8041-2:2021)
Human response to vibration - Measuring instrumentation - Part 2: Personal vibration
exposure meters (ISO 8041-2:2021)
Schwingungseinwirkung auf den Menschen - Messeinrichtung - Teil 2: Messgeräte für
die personenbezogene Schwingungseinwirkung (ISO 8041-2:2021)
Réponse des individus aux vibrations - Appareillage de mesure - Partie 2: Instrument de
mesure de l'exposition des personnes aux vibrations (ISO 8041-2:2021)
Ta slovenski standard je istoveten z: EN ISO 8041-2:2021
ICS:
13.160 Vpliv vibracij in udarcev na Vibration and shock with
ljudi respect to human beings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 8041-2
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2021
EUROPÄISCHE NORM
ICS 13.160 Supersedes EN ISO 8041:2005
English Version
Human response to vibration - Measuring instrumentation
- Part 2: Personal vibration exposure meters (ISO 8041-
2:2021)
Réponse des individus aux vibrations - Appareillage de Schwingungseinwirkung auf den Menschen -
mesure - Partie 2: Instruments de mesure de Messeinrichtung - Teil 2: Messgeräte für die
l'exposition des personnes aux vibrations (ISO 8041- personenbezogene Schwingungseinwirkung (ISO
2:2021) 8041-2:2021)
This European Standard was approved by CEN on 24 May 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8041-2:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 8041-2:2021) has been prepared by Technical Committee ISO/TC 108
"Mechanical vibration, shock and condition monitoring" in collaboration with Technical Committee
CEN/TC 231 “Mechanical vibration and shock” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by December 2021, and conflicting national standards
shall be withdrawn at the latest by December 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 8041:2005.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 8041-2:2021 has been approved by CEN as EN ISO 8041-2:2021 without any
modification.
INTERNATIONAL ISO
STANDARD 8041-2
First edition
2021-05
Human response to vibration —
Measuring instrumentation —
Part 2:
Personal vibration exposure meters
Réponse des individus aux vibrations — Appareillage de mesure —
Partie 2: Instruments de mesure de l'exposition des personnes aux
vibrations
Reference number
ISO 8041-2:2021(E)
©
ISO 2021
ISO 8041-2:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 8041-2:2021(E)
Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Reference environmental conditions . 4
5 Performance specifications . 4
5.1 General characteristics . 4
5.1.1 Common characteristics . 4
5.1.2 Special characteristics for whole-body vibration measurement. 6
5.1.3 Special characteristics for hand-arm vibration measurement. 6
5.2 Display . 6
5.3 Electrical output . 7
5.4 Vibration sensitivity . 7
5.5 Accuracy of indication at reference frequency under reference conditions . 7
5.6 Frequency weightings and frequency responses . 8
5.6.1 Parameters . 8
5.6.2 Band-limiting filter . 9
5.6.3 a-v transition filter . 9
5.6.4 Upward-step filter . 9
5.6.5 Overall frequency weighting . 9
5.6.6 Tolerances .10
5.7 Amplitude linearity .11
5.8 Instrument noise .11
5.9 Signal-burst response .11
5.10 Overload indication .14
5.11 Under-range indication .15
5.12 Time averaging .15
5.13 Running RMS acceleration .15
5.14 Clearance of data and instrument state (named reset) .15
5.15 Timing facilities .15
5.16 Electrical cross-talk .15
5.17 Vibration transducer characteristics .15
5.18 Power supply .15
5.19 Operator detection system .16
5.20 Detection of transient acceleration artefacts .16
5.21 Logging capabilities .16
5.22 Contact force measurement .17
5.23 Warning indication .17
5.23.1 General.17
5.23.2 Mandatory warning indications .17
5.23.3 Optional warning indications .17
5.24 Human interface and ergonomic aspects .18
6 Mounting .19
7 Environmental and electromagnetic criteria .19
7.1 General .19
7.2 Air temperature .19
7.3 Surface temperature .19
7.4 Electrostatic discharge .19
7.5 Radio-frequency emissions and public-power-supply disturbances .20
7.6 Immunity to AC power-frequency fields and radio-frequency fields .20
7.7 Ingress of water and dust .21
ISO 8041-2:2021(E)
8 Provision for use with auxiliary devices.21
9 Instrument marking .21
10 Instrument documentation .22
11 Performance testing.22
12 Pattern evaluation .23
12.1 General .23
12.2 Testing requirements .24
12.3 Submission for testing .24
12.4 Marking of the instrument and information in the instrument documentation .24
12.5 Mandatory facilities and general requirements .25
12.6 Initial instrument preparation .25
12.7 Indication at the reference frequency under reference conditions .25
12.8 Electrical cross-talk .26
12.9 Vibration transducer .26
12.10 Amplitude linearity .26
12.10.1 Electrical tests of amplitude linearity . .26
12.10.2 Mechanical tests of amplitude linearity .27
12.11 Frequency weightings and frequency responses .28
12.11.1 General.28
12.11.2 Mechanical tests of frequency response .29
12.11.3 Electrical tests of frequency response .30
12.11.4 Conformance .31
12.12 Instrument noise .31
12.13 Signal-burst response .31
12.14 Overload indication .32
12.15 Reset .32
12.16 Combined axis outputs .32
12.17 AC electrical output .32
12.18 Timing facilities .32
12.19 Power supply .32
12.20 Environmental, electrostatic and radio-frequency tests .33
12.20.1 General.33
12.20.2 Expanded uncertainties for measurements of environmental conditions .33
12.20.3 Acclimatization requirements for tests of the influence of air temperature
and relative humidity .33
12.20.4 Test of the influence of air temperature and relative humidity combined .33
12.20.5 Influence of surface temperature .34
12.20.6 Influence of electrostatic discharges .34
12.20.7 Radio-frequency emissions and public-power-supply disturbances .35
12.20.8 Immunity to AC power-frequency fields and radio-frequency fields .35
12.21 Operator detection system .36
12.22 Logging capabilities .36
12.23 Warning indication (mandatory warnings) .37
12.24 Test report .37
13 Periodic verification .37
13.1 General .37
13.2 Testing requirements .38
13.3 Test object .38
13.4 Submission for testing .38
13.5 Preliminary inspection .38
13.6 Marking of the instrument and information in the instrument documentation .38
13.7 Test procedure .39
13.8 Test parameters .39
13.8.1 Vibration measurement chain for hand-arm vibration .39
13.8.2 Vibration measurement chain for whole-body vibration .40
13.8.3 Vibration measurement chain low-frequency whole-body vibration.40
iv © ISO 2021 – All rights reserved

ISO 8041-2:2021(E)
13.9 Conducting the test .40
13.10 Test report .41
14 In-situ check .41
14.1 General .41
14.2 Preliminary inspection .41
14.3 Vibration sensitivity (field calibration) .41
Annex A (informative) Treatment of transient acceleration artefacts .43
Annex B (informative) Influence of coupling force on hand-arm vibration evaluation .48
Annex C (informative) Human interface .52
Bibliography .53
ISO 8041-2:2021(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
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.
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
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
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).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
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, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 231, Mechanical vibration and shock, in accordance with the Agreement
on technical cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 8041 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.
vi © ISO 2021 – All rights reserved

ISO 8041-2:2021(E)
Introduction
ISO 8041-1 specifies instruments for measuring human exposure to vibration. These instruments are
used for temporary, short time measurements or controlled measurements.
This document specifies personal vibration exposure meters (abbreviated to PVEM) for measuring
human exposure to vibration over long time periods, e.g. a whole working shift.
It is not necessary for PVEM to fulfil all of the specifications given in ISO 8041-1. On the other hand, it
is necessary for them to fulfil other requirements which allow non-controlled measurements or stand-
alone measurements over longer time periods. In combination with alarm functions, PVEM can make
it possible to alert the user before vibration exposure reaches certain values (action value, limit value).
For this reason, it is necessary to distinguish PVEM from the instrumentation specified in ISO 8041-1.
Whilst some potential applications and artefacts are covered in the informative annexes, this standard
is an instrument standard and does not cover all potential applications of the PVEM. The reader should
refer to measurement standards and guidance for further information.
Annex A describes the treatment of transient acceleration artefacts, Annexes B and C describe possible
extension features with additional information for the measurement procedure.
INTERNATIONAL STANDARD ISO 8041-2:2021(E)
Human response to vibration — Measuring
instrumentation —
Part 2:
Personal vibration exposure meters
1 Scope
This document specifies minimum requirements for personal vibration exposure meters (PVEM).
This document is applicable to instruments designed for measurements of whole-body vibration in the
context of industrial hygiene applications (according to ISO 2631-1, ISO 2631-2 and ISO 2631-4) and/or
hand-arm vibration (according to ISO 5349-1) together with the associated exposure times.
This document provides specified design goals and permitted tolerances that define the minimum
performance capabilities and functional requirements of instruments designed to measure personal
daily vibration exposure.
This document does not apply to instruments designed to measure or log exposure times without also
performing vibration measurement. Instrumentation of this type is described in ISO/TR 19664.
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 2631-1, Mechanical vibration and shock — Evaluation of human exposure to whole-body vibration —
Part 1: General requirements
ISO 2631-2, Mechanical vibration and shock — Evaluation of human exposure to whole-body vibration —
Part 2: Vibration in buildings (1 Hz to 80 Hz)
ISO 2631-4, Mechanical vibration and shock — Evaluation of human exposure to whole-body vibration —
Part 4: Guidelines for the evaluation of the effects of vibration and rotational motion on passenger and crew
comfort in fixed-guideway transport systems
ISO 5347 (all parts), Methods for the calibration of vibration and shock pick-ups
ISO 5349-1, Mechanical vibration — Measurement and evaluation of human exposure to hand-transmitted
vibration — Part 1: General requirements
ISO 5805, Mechanical vibration and shock — Human exposure — Vocabulary
ISO 8041-1:2017, Human response to vibration — Measuring instrumentation — Part 1: General purpose
vibration meters
ISO 10326-1, Mechanical vibration — Laboratory method for evaluating vehicle seat vibration — Part 1:
Basic requirements
ISO 15230-1, Mechanical vibration and shock — Coupling forces at the man-machine interface for hand-
transmitted vibration
ISO 8041-2:2021(E)
ISO 16063 (all parts), Methods for the calibration of vibration and shock transducers
ISO 16063-21, Methods for the calibration of vibration and shock transducers — Part 21: Vibration
calibration by comparison to a reference transducer
ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in
me a s ur ement (GUM: 1995)
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) — Part 4-2: Testing and measurement
techniques — Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) — Part 4-3: Testing and measurement
techniques — Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-6, Electromagnetic compatibility (EMC) — Part 4-6: Testing and measurement techniques –
Immunity to conducted disturbances, induced by radio-frequency fields
IEC 61000-6-2:2016, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity
standard for industrial environments
CISPR 22:2008, Information technology equipment — Radio disturbance characteristics — Limits and
methods of measurement
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2041, ISO 2631-1, ISO 5349-1,
ISO 5805, ISO 8041-1 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
personal vibration exposure meter
PVEM
instrument designed to measure and log personal vibration exposures by detecting occurrences of
exposure and measuring associated human vibration together with the exposure time
Note 1 to entry: The principal components of a personal vibration exposure meter are shown in Figure 1.
2 © ISO 2021 – All rights reserved

ISO 8041-2:2021(E)
Key
1 part A 6 display and control
2 part B 7 logging, signal processing
3 transducer 8 fixed or temporary wired or wireless interface
4 coupling 9 operator detection system (ODS)
5 vibrating surface
Figure 1 — Principal components of a PVEM
3.2
permanent measurement system
system which is permanently incorporated into or fitted onto a machine
Note 1 to entry: A permanent measurement system is not designed to be routinely transferred to other vibrating
machinery.
3.3
non-permanent measurement system
system which is designed to be used on several machines or other vibrating objects
Note 1 to entry: A non-permanent measurement system is capable of routinely being transferred from one
vibrating object or machine to another.
3.4
user
person authorized to operate a PVEM (3.1)
3.5
operator
worker
person who performs a work task at a workplace
3.6
logging
storing measured acceleration values at regular time intervals
3.7
logging step
time interval between the start of two consecutive logging (3.6) periods
ISO 8041-2:2021(E)
3.8
measurement period
duration of all measurements, representing the worker's (3.5) exposure time
Note 1 to entry: The measurement period usually comprises many logging steps (3.7).
3.9
transient acceleration artefact
event or effect that can alter the computation of workers’ (3.5) daily exposure to vibration
Note 1 to entry: For a PVEM (3.1), it is essential to log sufficient information to identify transient acceleration
artefacts for the purpose to treat them in real time or in the post-processing.
4 Reference environmental conditions
Reference environmental conditions for specifying the performance of a personal vibration exposure
meter are the following:
— air temperature: 23 °C;
— relative humidity: 50 %.
5 Performance specifications
5.1 General characteristics
5.1.1 Common characteristics
A personal vibration exposure meter (PVEM) is a vibration measurement system meeting the relevant
requirements of ISO 8041-1 with the additional capability to monitor personal exposures up to a full
working day.
Since personal vibration exposure meters are instruments capable of measuring and computing daily
vibration exposures they are simple to use and implement (internal complexity hidden from the user)
and automatic (i.e. they do not require manual post-processing or computations), while displaying
accurate and reliable results. Hence, as compared to general-purpose vibration meters, PVEM shall run
algorithms that replace as much as possible any required manual signal post-processing.
Particularly, one design goal is to identify measurement events or periods that might need to be rejected
and that could be automatically discarded from the vibration exposure computation using artefact
rejection algorithms. Those automatic artefacts rejection algorithms are an additional feature of PVEM
as compared to general-purpose vibration meters. In operation PVEMs are typically left unattended.
5.19 to 5.24 give additional recommendations and specifications for PVEM.
The PVEM may consist of separate parts (see parts A and B in Figure 1). Part B of the PVEM provides
the means to present the results of measurements. The presentation of results may be in any suitable
form, e.g. continuous “live” display or upload of measured values to a dedicated displaying unit or a
computer at the end of the measurement period. Part B is an inherent part of the PVEM and compulsory
for a pattern evaluation and periodic verification of the PVEM. However it needs not to be used with
part A for the period of exposure measurement.
In addition to the relevant requirements of ISO 8041-1, a PVEM shall
— derive vibration exposure by measuring vibration magnitudes and directly related exposure times,
— measure vibration in three directions (x, y, z) simultaneously,
4 © ISO 2021 – All rights reserved

ISO 8041-2:2021(E)
— provide capability for measurement over the period of a working day (at least 12 h) without
intervention by the user,
— include a real-time clock,
— continuously log vibration data versus time over the full measurement period at suitable
programmable intervals which are no greater than 1 s,
NOTE Suitable logging steps can be as defined in ISO 2631-4 or selected by the user. The manufacturer
can provide a choice of logging periods according to the measurement type.
— store logged vibration exposure data in a non-volatile memory, such that the data are not
compromised if the power supply is interrupted (e.g. if the battery is low or being replaced),
— output information on logged vibration magnitudes, corresponding real time, and overall daily
vibration exposure and daily exposure time, and
— provide information that will assist the user to exclude transient acceleration artefacts from
exposure measurements (see Annex A).
The facility for reading measurement data from the instrument may be a direct display on the
instrument or a remote display, or both.
Where the PVEM provides alarms for exposure exceedances, then the manufacturer shall provide
information on the conditions for the alarm trigger points and on any capability to adjust the exposure
trigger levels.
The reference vibration signal values and reference frequencies are given in Table 1.
Not all of the frequency weightings given in Table 1 need to be implemented in a PVEM, and further
frequency weightings (see ISO/TR 18570) may also be implemented. The manufacturer shall state
which frequency weightings are implemented.
Table 1 — Reference vibration values and frequencies
Application Frequency Nominal Reference Weighting Weighted
weighting frequency factor at acceleration
range reference at reference
RMS
frequency frequency
Frequency acceleration
and RMS
value
acceleration
value
2 2
Hz m/s m/s
500 rad/s
Hand-
W 8 to 1 000 10 0,202 0 2,020
h
transmitted
(79,58 Hz)
W 0,812 6 0,812 6
b
W 0,514 5 0,514 5
c
W 0,126 1 0,126 1
d
100 rad/s
0,5 to 80
Whole-body W 1 0,062 87 0,062 87
e
(15,915 Hz)
W 1,019 1,019
j
W 0,771 8 0,771 8
k
W 1 to 80 0,336 2 0,336 2
m
2,5 rad/s
Low-frequency
W 0,1 to 0,5 0,1 0,388 8 0,038 88
f
whole-body
(0,397 9 Hz)
ISO 8041-2:2021(E)
5.1.2 Special characteristics for whole-body vibration measurement
For instruments designed for whole-body vibration, the PVEM shall
— measure vibration at the interface between the machine and the operator's body (in accordance
with ISO 2631-1),
— be capable of responding to vibration peak values up to 50 m/s ,
NOTE In special applications vibration peak values up to 200 m/s have been observed.
— measure exposure characteristics based on A(8) exposures,
— optionally, measure exposure characteristics based on vibration dose value (VDV),
— optionally, measure exposure characteristics based on maximum transient vibration value (MTVV),
— optionally, measure exposure characteristics based on motion sickness dose value (MSDV),
— allow all part A components (see Figure 1) to be fitted unobtrusively to either the machine seat or
the machine operator,
— (for non-permanent and optionally for permanent measurement systems) incorporate the part A
component of the instrument into a seat pad meeting the requirements of ISO 10326-1, and
— (for permanent measurement systems not using a seat pad) incorporate the part A component of
the PVEM into a seat structure in a way that does not adversely impact the seat suspension system
or comfort of the driver but provides measurements equivalent to that required by ISO 2631-1 for
health effects.
The directions of the three orthogonal axes shall be marked on the transducer.
5.1.3 Special characteristics for hand-arm vibration measurement
For instruments designed for hand-arm vibration, t
...