oSIST prEN 17690-1:2022
(Main)Components for BAC Control Loop - Sensors - Part 1: Room temperature sensors
Components for BAC Control Loop - Sensors - Part 1: Room temperature sensors
This document specifies requirements and test methods for room temperature sensors used to control the room temperature.
This document covers wall mounted and flush mounted room temperature sensors.
The following aspects are not covered by this document:
- Pendulum temperature sensors
- Ceiling mounted temperature sensor
- Extract air temperature sensors
NOTE The measured value available at the output of the sensor is influenced by the place where the sensor device is located and factors such as air velocity, wall temperature, self/waste heating of the device and the air temperature. The perceived temperature, which is important for the well-being of a person, depends among other factors on air temperature, temperature of the surrounding walls and air flow rate as indicated in EN ISO 7730.
The temperature sensor element can be combined with other sensors in one device. This document only deals with the room temperature sensing of this devices. Other sensors are not covered except of their influence on the room temperature sensing (e.g. self-heating).
This document specifies sensor characteristics contributing to the determination of the control accuracy of individual zone controller according to EN 15500 1.
Komponenten für BAC-Regelkreis - Sensoren - Teil 1: Raumtemperaturfühler
Dieses Dokument legt Anforderungen und Prüfverfahren für zur Regelung der Raumtemperatur verwendete Raumtemperatursensoren fest.
Dieses Dokument behandelt wandmontierte und bündig montierte Raumtemperatursensoren.
Die folgenden Aspekte werden in diesem Dokument nicht behandelt:
- Pendeltemperatursensoren
- Deckenmontierter Temperatursensor
- Ablufttemperatursensoren
ANMERKUNG Der am Ausgang des Sensors verfügbare gemessene Wert wird durch die Position des Sensors und Faktoren wie Luftgeschwindigkeit, Wandtemperatur, Eigenerwärmung/Abwärme des Geräts und die Lufttemperatur beeinflusst. Die wahrgenommene Temperatur, die für das Wohlbefinden einer Person wichtig ist, hängt von anderen Faktoren wie der Lufttemperatur, der Temperatur der umgebenden Wände und dem Luftstrom nach EN ISO 7730 ab.
Das Temperatursensor-Element kann mit anderen Sensoren in einem Gerät kontrolliert werden. Dieses Dokument behandelt nur die Raumtemperaturmessung dieses Geräts. Andere Sensoren werden lediglich hinsichtlich ihres Einflusses auf die Temperaturmessung (z. B. Eigenerwärmung) behandelt.
Dieses Dokument legt Sensoreigenschaften fest, die zu der Bestimmung der Regelgenauigkeit einzelner Zonenregler nach EN 15500 1 beitragen.
Composants d'une boucle de régulation - Capteurs - Partie 1: Capteurs de température
Le présent document spécifie les exigences et les méthodes d'essai pour les capteurs de température ambiante utilisés pour réguler la température ambiante.
Le présent document couvre les capteurs de température ambiante à montage mural et encastrés.
Les aspects suivants ne sont pas couverts par le présent document :
- capteurs de température pendulaires ;
- capteurs de température montés au plafond ;
- capteurs de température d'air extrait.
NOTE La valeur mesurée disponible à la sortie du capteur est influencée par l'endroit où se trouve le dispositif de détection et par des facteurs tels que la vitesse de l'air, la température des parois, l'auto-échauffement ou l'échauffement résiduel du dispositif et la température de l'air. La température perçue, qui est importante pour le bien-être d'une personne, dépend entre autres facteurs de la température de l'air, de la température des parois environnantes et du débit d'air, comme indiqué dans l'EN ISO 7730.
L'élément capteur de température peut être combiné avec d'autres capteurs dans un même dispositif. Le présent document ne traite que de la détection de la température ambiante de ces dispositifs. Les autres capteurs ne sont pas couverts, à l'exception de leur influence sur la détection de la température ambiante (par exemple, l'auto-échauffement).
Le présent document spécifie les caractéristiques des capteurs contribuant à la détermination de la précision de régulation du régulateur de zone individuel selon l'EN 15500 1.
Sestavni deli za krmilno zanko BAC - Senzorji - 1. del: Senzorji za sobno temperaturo
General Information
Standards Content (sample)
SLOVENSKI STANDARD
oSIST prEN 17690-1:2022
01-september-2022
Sestavni deli za krmilno zanko BAC - Senzorji - 1. del: Senzorji za sobno
temperaturo
Components for BAC Control Loop - Sensors - Part 1: Room temperature sensors
Komponenten für BAC-Regelkreis - Sensoren - Teil 1: Raumtemperaturfühler
Composants d'une boucle de régulation - Capteurs - Partie 1: Capteurs de température
Ta slovenski standard je istoveten z: prEN 17690-1ICS:
17.200.20 Instrumenti za merjenje Temperature-measuring
temperature instruments
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
oSIST prEN 17690-1:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 17690-1:2022
DRAFT
EUROPEAN STANDARD
prEN 17690-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2022
ICS 17.200.20; 91.140.10
English Version
Components for BAC Control Loop - Sensors - Part 1: Room
temperature sensors
Composants d'une boucle de régulation - Capteurs - Komponenten für BAC-Regelkreis - Sensoren - Teil 1:
Partie 1: Capteurs de température RaumtemperaturfühlerThis draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 247.If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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.Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17690-1:2022 E
worldwide for CEN national Members.---------------------- Page: 3 ----------------------
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Contents Page
European foreword ............................................................................................................................................ 4
Introduction .......................................................................................................................................................... 5
1 Scope .......................................................................................................................................................... 6
2 Normative references .......................................................................................................................... 6
3 Terms and definitions ......................................................................................................................... 6
4 Symbols, units and abbreviations ................................................................................................... 8
5 Room temperature sensor device ................................................................................................... 9
6 Requirements ......................................................................................................................................... 9
6.1 Electrical requirements ...................................................................................................................... 9
6.1.1 Electromagnetic compatibility ......................................................................................................... 9
6.1.2 Degree of protection ............................................................................................................................ 9
6.2 Declarations by the manufacturer ................................................................................................ 10
6.2.1 General.................................................................................................................................................... 10
6.2.2 Protection class ................................................................................................................................... 10
6.2.3 Measuring range .................................................................................................................................. 10
6.2.4 Sensor (device) accuracy ................................................................................................................. 10
6.2.5 Time constant t ............................................................................................................................... 11
6.2.6 Wall coupling coefficient k .......................................................................................................... 11
6.2.7 Self-heating compensation .............................................................................................................. 11
6.2.8 Output signals ...................................................................................................................................... 12
6.2.9 Power supply ........................................................................................................................................ 12
6.2.10 Power consumption of the device ................................................................................................. 12
6.2.11 Electrical connection ......................................................................................................................... 13
6.2.12 Dimensions............................................................................................................................................ 13
6.2.13 Weight ..................................................................................................................................................... 13
6.2.14 Environmental conditions ............................................................................................................... 13
7 Test set-up ............................................................................................................................................. 13
7.1 Test equipment .................................................................................................................................... 13
7.1.1 Climatic chamber ................................................................................................................................ 13
7.1.2 Wall modules ........................................................................................................................................ 14
7.2 Test installation ................................................................................................................................... 17
7.2.1 Mounting of the Device Under Test (DUT) ................................................................................. 17
7.2.2 Wiring of the room sensor devices ............................................................................................... 17
7.2.3 Reference sensor position ............................................................................................................... 17
7.3 Temperature homogeneity ............................................................................................................. 19
7.4 Determination of the mean air velocity ...................................................................................... 20
7.5 Homogeneity of air velocity ............................................................................................................ 20
8 Test methods ........................................................................................................................................ 20
8.1 Sensor accuracy ................................................................................................................................... 20
8.1.1 General.................................................................................................................................................... 20
8.1.2 Test conditions sensor accuracy test ........................................................................................... 21
8.1.3 Impact of temperature variation Δϑ .................................................................................... 21
tvar8.1.4 Impact of air velocity variation Δϑ .................................................................................... 22
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8.1.5 Impact of power supply of the device Δϑ ......................................................................... 22
psup8.2 Time constant ...................................................................................................................................... 23
8.2.1 General ................................................................................................................................................... 23
8.2.2 Test conditions .................................................................................................................................... 24
8.3 Wall coupling........................................................................................................................................ 25
8.3.1 General ................................................................................................................................................... 25
8.3.2 Test conditions .................................................................................................................................... 26
8.4 Power consumption measurement .............................................................................................. 27
8.4.1 General ................................................................................................................................................... 27
8.4.2 Average Active Power ....................................................................................................................... 27
8.4.3 Average Apparent Power ................................................................................................................. 27
8.4.4 Inrush peak current and periodic peak current measurement......................................... 28
9 Marking and Documentation .......................................................................................................... 28
9.1 Marking .................................................................................................................................................. 28
9.2 Documentation .................................................................................................................................... 28
Annex A (informative) Measurements ..................................................................................................... 30
A.1 24 power supply / 0-10 V sensor output .................................................................................... 30
A.2 24 V power supply / 4-20 mA sensor output ............................................................................ 31
A.3 24 V power supply (4-20 mA in the loop), 4-20 mA Sensor Output.................................. 31
A.4 24V power supply, Sensor Output: Bus Signal (e.g. KNX) ..................................................... 32
A.5 24V power supply: bus powered, Sensor Output: Bus Signal (e.g. KNX) ........................ 33
A.6 Inrush and periodic peak current measurement ................................................................... 34
A.7 Correction factor air velocity inside the test chamber ......................................................... 35
Bibliography ....................................................................................................................................................... 39
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European foreword
This document (prEN 17690-1:2022) has been prepared by Technical Committee CEN/TC 247 “Building
Automation and Controls”, the secretariat of which is held by SNV.This document is currently submitted to the CEN Enquiry.
This document is part of a series of standards on Components of Building Automation and Control loop.
A list of all parts in a series can be found on the CEN website.---------------------- Page: 6 ----------------------
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Introduction
Various EU Directives and National Regulations regarding energy saving and energy performance of
buildings require proof of energy efficiency.BAC standards and Technical Reports (mainly EN ISO 52120-1, CEN ISO/TR 52120-2, EN 15500-1 and
CEN/TR 15500-2) show the impact of building automation on the energy performance of buildings.
Characteristics like Control Accuracy of Control Loops, BAC functions and BAC Strategies are important
parts specifying the energy performance. To ensure the performance of a control loop, the quality of all
elements in the control loop need to fulfil specific requirements.A set of standards and the appropriate Technical Report (CEN/prTR 17689-1, Quality and Performance
Assessment of the components for BAC Control Loop — Umbrella Document) will cover the requirements
of the control loop elements (sensors, valves and actuators used in building automation control loops).
Classifications and test methodologies for these components will be described. The set of standards allow
the market to select appropriate components achieving a desired quality of a control loop.
This document provides requirements of room temperature sensors to ensure overall quality and
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1 Scope
This document specifies requirements and test methods for room temperature sensors used to control
the room temperature.This document covers wall mounted and flush mounted room temperature sensors.
The following aspects are not covered by this document:
— Pendulum temperature sensors
— Ceiling mounted temperature sensor
— Extract air temperature sensors
NOTE The measured value available at the output of the sensor is influenced by the place where the sensor
device is located and factors such as air velocity, wall temperature, self/waste heating of the device and the air
temperature. The perceived temperature, which is important for the well-being of a person, depends among other
factors on air temperature, temperature of the surrounding walls and air flow rate as indicated in EN ISO 7730.
The temperature sensor element can be combined with other sensors in one device. This document only
deals with the room temperature sensing of this devices. Other sensors are not covered except of their
influence on the room temperature sensing (e.g. self-heating).This document specifies sensor characteristics contributing to the determination of the control accuracy
of individual zone controller according to EN 15500-1.2 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.
EN 60730-1, Automatic electrical controls for household and similar use - Part 1: General requirements
EN 215, Thermostatic radiator valves - Requirements and test methodsEN 60529, Degrees of protection provided by enclosures (IP Code)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
measuring range
range of measured values for a measurand in which defined or agreed error limits are not exceeded
Note 1 to entry: The output or indication range (e.g. display) can be the same as the measuring range, but this is
not always the case. If the indication range is larger than the measuring range, larger or undefined error limits shall
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3.2
time constant t
time the sensor needs after a temperature step to reach 63,2% of the temperature step range
3.3sensor accuracy
deviation of the measured room temperature of the sensor to the room temperature within the operation
range3.4
wall coupling
ratio for the influence of the wall temperature on the measured temperature of the sensor
3.5turbulence degree
value characterizing the dimension of the turbulence of an air flow which superposes a principal direction
according to EN 2153.6
waste heat
total heat produced inside the device independent on the heat source
3.7
active sensor
sensor producing a change in some active electrical quantity such as voltage as a result of temperature
measurementNote 1 to entry: Active sensor could be analogue or digital.
Note 2 to entry: Active sensors analogue generates a signal like electrical current or voltage in response to the
measured room temperature and require an external power source to operate.Note 3 to entry: Active sensors digital deliver the measured value as defined by the communication protocol and
they can be powered by the communication interface or an external power source.Note 4 to entry: Wireless sensors are included.
3.8
passive sensor
sensor producing a change in some passive electrical quantity such as resistance as a result of
temperature measurement3.9
room temperature
operative temperature in the occupied zone
Note 1 to entry: For operative temperature see EN ISO 7730.
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3.10
measured room temperature
temperature measured by the sensor inside the sensor device at the place where it is located in the room
Note 1 to entry: The measured temperature depends on the air temperature, radiation from surrounding surfaces
and heat conductivity from the wall on which the sensor device is mounted.Note 2 to entry: The amount of heat by radiation and convection resulting in the measured temperature need not
to be equivalent to the operative temperature.4 Symbols, units and abbreviations
Table 1 — Symbols and units
Symbol Name of Quantity Unit
f factor -
k coefficient %
I current A
P power W
q volume flow
m /h
T thermodynamic temperature K
t time, period of time s
u velocity m/s
ν kinematic viscosity
m /s
t time constant min
δ thickness m
ϑ celsius temperature °C
Δ delta (difference) prefix to be combined
with symbols
Table 2 — Subscripts
Subscript Explanation
corr correction
ccs centre of cross section
cots complete test section
ipc inrush peak current
ppc periodic peak current
S sensor
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Subscript Explanation
Su power supply
W wall
0 base, reference
step temperature step for
time constant
tvar temperature variation
airvel air velocity
psup power supply
Table 3 — Abbreviations
Abbreviation Explanation
AC alternate current
DC direct current
AHU air handling unit
SELV safety extra-low voltage
DUT device under test
5 Room temperature sensor device
The room temperature sensor devices according to this document consist of a sensing element and a
housing with or without internal electronics.In this document room temperature sensor device and room temperature sensor are used as equivalent.
For the sensing element, the term room temperature sensor element is used.It can be combined with other sensor elements (e.g. CO , relative humidity) or control elements (e.g. room
controller) in the same housing. The other elements are not part of this document except of their influence
on the room temperature sensing (e.g. self-heating).The sensor output signal can be active analogue (e.g. voltage/current), active digital (e.g. communication
bus incl. wireless) or passive (e.g. resistive).6 Requirements
6.1 Electrical requirements
6.1.1 Electromagnetic compatibility
Room temperature sensors shall meet the requirements of EN 60730-1, for use in residential, commerce,
light industrial and industrial environments.6.1.2 Degree of protection
Room temperature sensors shall comply with protection degree of housing: IP30 according to EN 60529.
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6.2 Declarations by the manufacturer
6.2.1 General
In the following part, several useful declarations of characteristics are listed.
If they are declared by the manufacturer, they shall be measured as described in Clause 8 or according to
the referenced standard.NOTE Variants of room temperature sensor devices can be grouped according to their physical behaviour,
design or measurement behaviour.Declarations can be made for groups of sensors. In this case, the specific values or characteristics of single
products can differ but shall be within the specified range. (Better than specified values).
6.2.2 Protection classProtection class defines the level against electric shock e.g. protection class: III according to the definition
for class III in EN 60730-1.6.2.3 Measuring range
The manufacturer shall declare the measuring range of the sensor device, e.g. from 0°C to 50°C.
6.2.4 Sensor (device) accuracyThe accuracy of the sensor device depends on various factors, as for example:
— accuracy of the sensing element
— accuracy and resolution of the AC/DC conversion
— numerical errors in the signal conversion
— accuracy and resolution of the DC/AC conversion
— electrical influence of supply voltage
— electrical influence of the attached controlling element (burden, ….)
— over speaking (cross influences) of signal outputs
— noises on the output signal itself
— resolution of a communication bus or protocol
— waste heat effects
The manufacturer shall declare the accuracy at a reference temperature in a certain range.
For example, the following information may be declared as described in Table 3:---------------------- Page: 12 ----------------------
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Table 3 — Example of accuracy declaration
Characteristics Value(s) Unit
accuracy of 20°C or 25°C ±x K
sensing element
accuracy of 15°C to 35°C ±y K
sensing element
in the range of
The following additional information may be declared by the manufacturer:
— impact of temperature variation;
— impact of air speed variation;
— impact of power supply variation.
6.2.5 Time constant t
The time constant t is the time in minutes until the temperature sensor reading (output signal
converted into a temperature value) shows 63,2 % of the temperature step. It shall be declared in minutes
with a maximum of one digit after the decimal point.Table 4 shows example of declaration of time constant t .
Table 4 — Example of declaration for Time constant τ
Type of declaration Value(s) Unit
by product 17,6 or < 19 min
by range of products < 19 min
6.2.6 Wall coupling coefficient k
The wall coupling coefficient k in percent determines the influence of the wall temperature on the
measured room temperature.Table 5 shows example of declaration of wall coupling k .
Table 5 — Example of declaration for wall coupling k
Type of declaration Value(s) Unit
by product approximately 45 %
by range of products 35 to 50 %
6.2.7 Self-heating compensation
The manufacturer may declare the self-heating compensation, e.g. default compensation of 0,5 K.
NOTE The self-heating compensation used by the manufacturer is an indication about possible measurement
deviations, caused by other boundary conditions than those assumed by the manufacturer.
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6.2.8 Output signals
Different types of output signals can apply. Table 6 gives different types of analogue output signals.
Table 6 — Analogue signalsType of output Signals
passive sensors characteristic curve of sensing element
active sensors analog output signal (e.g. 0 V to 10 V, or 4 mA to 20 mA)
Table 7 gives different types of digital output signals.
Table 7 — Example of digital signals
Type of output value Transmission mode
digital communication
protocol
data points
resolution of
measured value
repetition rate, e.g.
heart beat in seconds,
or change of value (in
0,01 K)
6.2.9 Power supply
In the following, different examples of power supply are given in Table 8.
Table 8 — Power supply types
Types Descriptions
operating voltage e.g. DC 12 or 15 V (SELV) / AC 24V ± - 20 %
operating frequency 50/60 Hz (for AC powered devices)
device specific power supply N/A
6.2.10 Power consumption of the device
For active sensors, average active power and average apparent power shall be declared. Average active
power shall be measured at nominal voltage and nominal load, where average apparent power shall be
measured at nominal voltage and maximum load.For battery powered devices, average lifetime of the battery shall be declared.
If significant peak consumption (≥30 % of average consumption) is measured, this value should also be
declared by the manufacturer. This is important for the dimensioning of the power supply and the supply
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6.2.11 Electrical connection
The type of electrical connection should be given by the manufacturer e.g. screw terminals for 2 wires of
2 20,25 mm to 1,5 mm .
6.2.12 Dimensions
The dimensions of room temperature sensors should be given by the manufacturer.
6.2.13 Weight
The weight of room temperature sensors including packaging should be given by the manufacturer.
6.2.14 Environmental conditionsEnvironmental conditions (climatic conditions and mechanical conditions) for transport and operation
according to IEC 70721-3-2 and IEC 60721-3-3 shall be given by the manufacturer.7 Test set-up
7.1 Test equipment
7.1.1 Climatic chamber
The tests shall be performed in a climatic chamber. It consists of an outer (1) and an inner chamber (2)
(chamber-in-chamber principle). The outer chamber (1) is thermally insulated and shall provide at least
50 mm air space around the inner chamber.The inner chamber (2) is installed in the upper part of the outer chamber (1).
The inner chamber (2) consists of installations for generating the laminar air flow (5), the test section (3),
perforated plates at the ceiling of the test section (6) and a collecting space (14) above the test section.
The test section (3) shall have quadratic cross section of 0,6 m x 0,6 m and be at least 0,5 m high.
The test sample is installed on a wall module (4) in the centre of the test section (3) and parallel to the
walls of test section.Supply air (7) is blown into the lower part of the outer chamber (1).
A part of the supply air (7) is used in the inner chamber (2). The air for test section (3) flows from the
other chamber (1) through the installations for generating laminar air flow (5) to the test section (3).
This should allow to build up a constant, homogenous laminar flow profile inside the test section (3).
The air flow through the test section (3) is measured by a venturi nozzle (9) in the extract air (8) of the
inner chamber. A damper (10) is used to control the air flow through the inner chamber (2).
The remaining part of the supply air (7) flows around the inner test chamber (2) to the extract air outlet
(13) of the outer chamber (1) and thereby helps to thermally insulate the inner chamber (2) from the
environment conditions.The extract air damper of the outer chamber (11) is used for the air balancing of the test rig.
An electric heater (12) in the supply air part (7) enables rapid changes of the supply air temperature as
needed for time constant measurements.Figure 1 shows the principle of the climatic chamber.
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Key
1 outer chamber
2 inner chamber (test chamber)
...
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