CEN/TS 15518-4:2013

SLOVENSKI STANDARD
01-maj-2013
Oprema za zimska vzdrževalna dela - Cestni vremensko-informacijski sistemi - 4.
del: Preskusne metode za stacionarno opremo
Winter maintenance equipment - Road weather information systems - Part 4: Test
methods for stationary equipment
Winterdienstausrüstung - Straßenzustands- und Wetterinformationssysteme - Teil 4:
Prüfverfahren bei stationären Einrichtungen
Matériel de viabilité hivernale - Systèmes d'information météorologique routière - Partie
4 : Méthodes d'essai pour les matériels fixes
Ta slovenski standard je istoveten z: CEN/TS 15518-4:2013
ICS:
07.060 Geologija. Meteorologija. Geology. Meteorology.
Hidrologija Hydrology
13.030.40 Naprave in oprema za Installations and equipment
odstranjevanje in obdelavo for waste disposal and
odpadkov treatment
35.240.99 8SRUDEQLãNHUHãLWYH,7QD IT applications in other fields
GUXJLKSRGURþMLK
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION
CEN/TS 15518-4
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
March 2013
ICS 07.060; 13.030.40; 35.240.99
English Version
Winter maintenance equipment - Road weather information
systems - Part 4: Test methods for stationary equipment
Matériel de viabilité hivernale - Systèmes d'information Winterdienstausrüstung - Straßenzustands- und
météorologique routière - Partie 4 : Méthodes d'essai pour Wetterinformationssysteme - Teil 4: Prüfverfahren bei
les matériels fixes stationären Einrichtungen
This Technical Specification (CEN/TS) was approved by CEN on 30 July 2012 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available
promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)
until the final decision about the possible conversion of the CEN/TS into an EN is reached.

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

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 15518-4:2013: E
worldwide for CEN national Members.

Contents Page
Foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Type reception test definition . 5
3.1 Introduction . 5
3.2 Pavement surface temperature . 6
3.3 Road surface condition . 10
3.4 Water film thickness . 16
3.5 Freezing temperature . 17
3.6 Road body temperature . 21
3.7 Air temperature . 21
3.8 Relative humidity . 23
3.9 Dew point temperature . 25
3.10 Precipitation detection time . 25
3.11 Precipitation type . 26
3.12 Precipitation intensity . 27
3.13 Snow depth. 28
3.14 Wind speed . 28
3.15 Gust of wind . 29
3.16 Wind direction . 29
3.17 Visibility . 31
Bibliography. 33

Foreword
This document (CEN/TS 15518-4:2013) has been prepared by Technical Committee CEN/TC 337 “Winter
maintenance and road service area maintenance equipment”, the secretariat of which is held by AFNOR.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document Winter maintenance equipment  Road weather information systems comprises of the
following parts:
 Part 1: Global definitions and components;
 Part 2: Road weather  Recommended observation and forecast;
 Part 3: Requirements on measured values of stationary equipments;
 Part 4: Test methods for stationary equipment (the present document).
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus,
Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Introduction
Road Weather Information Systems (RWIS) are complex structures used for road maintenance decision
support, which feature as a rule the following components: meteorological sensors and instruments,
transmission technology, computer systems for processing, representation and storing of information, road
weather forecasts, alarms, in relation to traffic control and traffic information systems and more.
This European Specification lays down the test procedures to verify the requirements on stationary equipment
defined in EN 15518-3.
The aim is to allow for objective and reproducible measurement analysis and evaluation.
1 Scope
This Technical Specification specifies the test methods, the experimental set-up and result analysis for the
laboratory qualification of stationary equipment within a RWIS.
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.
EN 13108-5, Bituminous mixtures — Material specifications — Part 5: Stone Mastic Asphalt
EN 15518-3, Winter maintenance equipment — Road weather information systems — Part 3: Requirements
on measured values of stationary equipments
EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
(ISO/IEC 17025)
ISO 17714, Meteorology — Air temperature measurements — Test methods for comparing the performance
of thermometer shields/screens and defining important characteristics
3 Type reception test definition
3.1 Introduction
3.1.1 General
The tests described hereafter apply to either a complete system (which can influence the measured value)
consisting of sensor, processing electronics and associated terminal program software necessary to acquire,
display and store the measurements in a digital form, or to some specific parts of the whole system when the
inputs can be simulated, as specified by the manufacturer. Figure 1 below is an illustration of the possible
functional components of a system.
The manufacturer shall specify and supervise the material set-up for the test set-up.
The manufacturer may not change the test set-up during the tests. The data shall be readable during the
whole test. The whole test shall stop in case the manufacturer changes the test set-up.
If a single sensor provides measurements subject to more than one test procedure, it shall always be tested
against all these procedures within the same test campaign and by the same laboratory. This is also valid for
tests after technical changes to a sensor.

Figure 1 — Possible functional components of a system
Test protocols shall state the version and type of hardware, firmware and software components as well as the
material set-up during the test.
In case of major technical changes to one or other of these components which affect the requirements of
EN 15518-3, the manufacturer shall seek new certification. In case of minor changes not affecting the
requirements of EN 15518-3, the manufacturer shall indicate the changes and, upon request, provide the
demonstration that the changes did not affect in an adverse way the system which was originally tested and
that the new system still meets the standard.
In general, if a sensor was tested as a single device, met the requirements of this standard, and its nominal
output can be simulated, the RWIS manufacturer shall be allowed to demonstrate only that the measuring
chain cannot influence the raw signal in a manner to exceed the allowed tolerance. This has to be confirmed
by an accredited laboratory.
Therefore, this standard applies to three possible configurations:
 sensor as single device;
 electronics with simulated sensor inputs;
 complete system.
3.1.2 Test body
Wherever stated, the sensor shall be permanently installed in the centre of a test body according to the
manufacturer’s specifications, which shall be part of the test report. The characteristics of the test body are:
a) Minimal dimensions 600 mm by 400 mm surface and 200 mm depth. There shall be a minimal distance of
15 cm between each side of the sensor (including sealing compound, in all three dimensions) and the
side of the test body. This shall be documented in the test report.
b) Realisation: Under similar conditions than road construction, having the following characteristics:
1) material: Asphalt Concrete (heavy traffic road);
2) layer: one single mixture (surface course) in three or more layers, the upper layer being 6 cm deep;
3) EN 13108-5, Bituminous mixtures — Material specifications — Part 5: Stone Mastic Asphalt:
i) grading rate: 8 mm:  100 %;
5,6 mm:  90 % to 100 %;
2 mm:  20 % to 40 %;
0,063 mm: 5 % to 12 %;
ii) binder rate:  B ;
min7,4
iii) maximum cavity rate: V ;
max3
iv) minimum cavity rate: V .
max2
Other test bodies may be defined and used in case of specific needs. The type and characteristics of the test
bodies shall be mentioned in the test report.
3.2 Pavement surface temperature
3.2.1 General
This test shall be realised under stabilised and transient temperatures (see below).
Unless otherwise specified, a valid measurement value shall be delivered by the system at latest 6 min after
the test conditions are met.
3.2.2 Test method
3.2.2.1 Stabilised temperature test
The sensor is plunged into a liquid bath set at stabilised temperatures. The temperature response of the
sensor is compared to the temperature response of a reference thermometer.
The test does not apply to sensors working without contact.
3.2.2.2 Transient surface temperature test
The test shall take place in a cooled climatic chamber. The sensor shall be installed in a test body as per 3.1.2
above. Reference probes shall be installed on the surface of the test body in a manner to reduce as much as
possible the influence of direct radiation.
A radiation source (2 halogen lamps) is switched on for a given time to simulate road heating by solar
radiation and cooling by emissivity.
The temperature response of the sensor shall be compared
...