ISO 22554:2023

INTERNATIONAL ISO
STANDARD 22554
Third edition
2023-07
Ships and marine technology —
Propeller shaft revolution indicators
— Electric type and electronic type
Navires et technologie maritime — Indicateurs de vitesse d'arbre du
propulseur — Type électrique et type électronique
Reference number
ISO 22554:2023(E)
© ISO 2023

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ISO 22554:2023(E)
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© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
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ISO 22554:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Construction of an indicator system.2
4.1 Indicator system . 2
4.2 Transmitters . 3
4.2.1 General . 3
4.2.2 Electric type . 4
4.2.3 Electronic type . 4
4.3 Indicator . 4
4.4 Alert . . 5
5 Performance requirements . .5
5.1 General . 5
5.2 Balance . 5
5.3 Friction error . 5
5.4 Calibration accuracy . 6
5.5 Damping. 6
5.6 Zero point . 6
5.7 Output electric signal of a signal converter . 6
5.8 Output electric signal accuracy of a signal converter . 6
5.8.1 General . 6
5.8.2 Accuracy . 6
5.8.3 Response speed . 6
5.9 Power supply fluctuations. 7
5.10 Insulation resistance and high voltage . 7
6 Methods of testing and required test results . 7
6.1 Test items and sequence . 7
6.2 Construction . 7
6.3 Safety, EMC and environmental tests. 8
6.4 Balance test . 8
6.5 Friction test . 8
6.6 Calibration accuracy test . 8
6.7 Damping test . 8
6.8 Zero-point test . 8
6.9 Signal converter output electric signal test . 8
6.10 Signal converter output electric signal accuracy test . 8
6.11 Power supply fluctuation test . 8
6.12 Alert test . . . 8
7 Interface . 8
8 Marking . . 9
9 Information . 9
Bibliography .10
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ISO 22554:2023(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 document 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).
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 6, Navigation and ship operations.
This third edition cancels and replaces the second edition (ISO 22554:2015), which has been technically
revised.
The main changes are as follows:
— the normative references have been updated;
— in 4.3 h), a requirement regarding digital-type indication on shipborne navigational displays, in
accordance with IMO Resolution MSC.191(79), as amended by MSC.466(101), has been added;
— in new 4.4 and 6.12, a provision on alerts and a reference to IEC 62923-1 and IEC 62923-2 have been
added;
— in 6.2, a requirement regarding methods of testing and required test results in accordance with
IEC 62288 has been added;
— in Clause 7, interface requirements have been added.
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.
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INTERNATIONAL STANDARD ISO 22554:2023(E)
Ships and marine technology — Propeller shaft revolution
indicators — Electric type and electronic type
1 Scope
This document specifies the construction, performance requirements, methods of testing, and required
test results for electric and electronic propeller shaft revolution indicators (hereinafter referred
to as “indicator system”). The requirements in this document are based on those contained in the
International Convention for the Safety of Life at Sea (SOLAS) 1974 (as amended, 2000), Clause 2.5.4,
Regulation 19, chapter V.
This document is intended to be used in conjunction with IMO Resolution A.694 (17) and IEC 60945.
NOTE A propeller shaft revolution indicator can be designed so that it also complies with the requirements
for a tachometer for the engine of a ship.
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.
IEC 60945, Maritime navigation and radiocommunication equipment and systems — General requirements
— Methods of testing and required test results
IEC 61162-1, Maritime navigation and radiocommunication equipment and systems — Digital interfaces —
Part 1: Single talker and multiple listeners
IEC 61162-2, Maritime navigation and radiocommunication equipment and systems — Digital interfaces —
Part 2: Single talker and multiple listeners, high-speed transmission
IEC 62288, Maritime navigation and radiocommunication equipment and systems — Presentation of
navigation-related information on shipborne navigational displays — General requirements, methods of
testing and required test results
IEC 61162-450, Maritime navigation and radiocommunication equipment and systems — Digital interfaces
— Part 450: Multiple talkers and multiple listeners — Ethernet interconnection
IEC 62923-1, Maritime navigation and radiocommunication equipment and systems — Bridge alert
management — Part 1: Operational and performance requirements, methods of testing and required test
results
IEC 62923-2, Maritime navigation and radiocommunication equipment and systems — Bridge alert
management — Part 2: Alert and cluster identifiers and other additional features
IMO Resolution MSC 191(79), Performance standards for the presentation of navigation-related
information on shipborne navigational displays
IMO Resolution MSC 466(101), Amendments to the performance standards for the presentation of
navigation-related information on shipborne navigational displays (Resolution MSC.191(79))
IMO Resolution MSC 302(87), Performance standards for bridge alert management
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ISO 22554:2023(E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
propeller shaft revolution indicator
remote device capable of indicating the number of revolutions per minute only, or the number of
revolutions per minute and the direction of the revolution
Note 1 to entry: Indicating the direction of the revolution is not relevant for propeller shafts that are intended to
turn in one direction only.
3.2
electric propeller shaft revolution indicator
electric-type indicator that employs a generator driven by the propeller shaft through the driving unit
that transmits the revolution speed (number of revolutions per minute) and direction of rotation of the
propeller shaft
3.3
electronic propeller shaft revolution indicator
electronic-type indicator that employs a revolution sensor that detects pulses generated by a gear
turning the propeller shaft or a circular disc with a slit and transmits these pulses to a signal converte
...