Water quality - Performance requirements and conformity test procedures for water monitoring equipment - Automatic sampling devices (samplers) for water and waste water

This document defines general requirements, performance requirements and conformity test procedures for automatic sampling devices (samplers) for water and waste water that:
—   sample water and waste water from non-pressurized (i.e. open to atmosphere) channels or vessels;
—   sample over extended periods to collect discrete or composite samples based on time, event or flow proportional sampling.
It does not include sampling systems built into online and in-line analysers.
The general requirements include functional facilities that samplers need to meet users’ applications and information that needs to be included in associated documents.
The test procedures specify uniform methods to be used when determining key performance characteristics of samplers. All of the test procedures are expected to be carried out under laboratory conditions. It is recognized that for some samplers certain test procedures are not applicable.
Statistical procedures are defined for evaluation of the test data. Some example calculations are provided.
Specific sample integrity requirements are defined for samplers to be used for the collection of samples of final effluent or influent for the purpose of monitoring the performance of waste water treatment works, as required under the EU’s Urban Waste Water Treatment Directive (UWWTD). Samplers to be used for other industrial applications do not need to be assessed against these specific sample integrity requirements.
This document does not cover the installation and on-going use of samplers.

Wasserbeschaffenheit - Leistungsanforderungen und Konformitätsprüfungen für Geräte zum Wassermonitoring - Automatische Probenahmegeräte für Wasser und Abwasser

Dieses Dokument legt allgemeine Anforderungen, Leistungsanforderungen und Verfahrensweisen für die Konformitätsprüfung von automatischen Probenahmegeräten für Wasser und Abwasser fest, die:
   für die Probenahme von Wasser und Abwasser aus nicht unter Druck stehenden (d. h. nach oben offen) Gerinnen oder Becken bestimmt sind;
   für die Probenahme über einen längeren Zeitraum zum Sammeln von Einzelproben oder Mischproben beruhend auf der zeit-, ereignis- oder durchflussproportionalen Probenahme bestimmt sind.
Es berücksichtigt nicht die in Online- und Inline-Analysatoren eingebauten Probenahmesysteme.
Die allgemeinen Anforderungen umfassen funktionelle Einrichtungen, die Probennahmegeräte benötigen, um den Anwendungen der Benutzer zu entsprechen, sowie Informationen, die in den zugehörigen Dokumenten enthalten sein müssen.
Die Prüfverfahren legen einheitliche Methoden fest, die bei der Bestimmung der wichtigsten Leistungsmerkmale von Probennahmegeräten anzuwenden sind. Es wird erwartet, dass alle Prüfverfahren unter Laborbedingungen durchgeführt werden. Es wird anerkannt, dass für einige Probennahmegeräte bestimmte Prüfverfahren nicht anwendbar sind.
Es werden statistische Verfahren für die Auswertung der Prüfdaten festgelegt. Es werden einige Beispielrechnungen angegeben.
Es werden spezifische Anforderungen zur Probenintegrität für Probenahmegeräte festgelegt, die zum Sammeln von Proben an der Ablauf- oder der Zulaufstelle verwendet werden, um die Leistung von Abwasserbehandlungsanlagen zu überwachen, wie in der Kommunalen Abwasserrichtlinie der EU gefordert. Probenahmegeräte, die für industrielle Zwecke verwendet werden, müssen nicht im Hinblick auf diese spezifischen Anforderungen zur Probenintegrität beurteilt werden.
Dieses Dokument schließt nicht die Installation und die laufende Nutzung von Probenahmegeräten ein.

Qualité de l'eau - Exigences de performance et modes opératoires d'essai de conformité pour les équipements de surveillance de l'eau - Dispositifs d'échantillonnage automatiques (échantillonneurs) pour l'eau et les eaux usées

Le présent document définit les exigences générales, les exigences de performance et les modes opératoires d'essai de conformité des dispositifs d'échantillonnage automatiques (échantillonneurs) pour l'eau et les eaux usées qui :
   échantillonnent l'eau et les eaux usées à partir de canaux ou de récipients non pressurisés (c'est à dire ouverts à l'atmosphère) ;
   effectuent des échantillonnages sur des périodes prolongées afin de prélever des échantillons discrets ou composites basés sur l'échantillonnage proportionnel au temps, à l'événement ou au débit.
Il n'inclut pas les systèmes d'échantillonnage intégrés aux analyseurs en ligne, avec ou sans boucle de prélèvement.
Les exigences générales comprennent les installations fonctionnelles dont les échantillonneurs ont besoin pour répondre aux besoins des utilisateurs pour leurs applications, ainsi que les informations qui doivent être incluses dans les documents associés.
Les modes opératoires d'essai spécifient les méthodes uniformes à utiliser pour déterminer les caractéristiques de performance clés des échantillonneurs. Tous les modes opératoires d'essai sont censés être réalisés en conditions de laboratoire. Il est reconnu que pour certains échantillonneurs, certains modes opératoires d'essai ne sont pas applicables.
Des procédures statistiques sont définies pour l'évaluation des données d'essai. Des exemples de calculs sont fournis.
Les exigences spécifiques sur l'intégrité de l'échantillon sont définies pour les échantillonneurs à utiliser pour prélever des échantillons d'effluent ou d'affluent final en vue de surveiller les performances des installations de traitement des eaux résiduaires, comme requis dans le cadre de la Directive européenne relative au traitement des eaux résiduaires urbaines (Directive ERU). Il n'est pas nécessaire d'évaluer les échantillonneurs à utiliser pour d'autres applications industrielles par rapport à ces exigences spécifiques d'intégrité de l'échantillon.
Le présent document ne couvre pas l'installation et l'utilisation courante des échantillonneurs.

Kakovost vode - Zahteve za zmogljivost in postopki preskušanja skladnosti opreme za monitoring vode - Avtomatski vzorčevalniki za vodo in odpadno vodo

General Information

Status
Not Published
Publication Date
26-Jun-2023
Current Stage
5060 - Closure of Vote - Formal Approval
Start Date
26-Jan-2023
Due Date
16-Dec-2022
Completion Date
26-Jan-2023

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SLOVENSKI STANDARD
oSIST prEN 16479:2022
01-januar-2022
Kakovost vode - Zahteve za zmogljivost in postopki preskušanja skladnosti
opreme za monitoring vode - Avtomatski vzorčevalniki za vodo in odpadno vodo

Water quality - Performance requirements and conformity test procedures for water

monitoring equipment - Automated sampling devices (samplers) for water and waste
water

Wasserbeschaffenheit - Leistungsanforderungen und Konformitätsprüfungen für Geräte

zum Wassermonitoring - Automatische Probenahmegeräte für Wasser und Abwasser

Qualité de l'eau - Exigences de performance et modes opératoires d'essai de conformité

pour les équipements de surveillance de l'eau - Dispositifs d'échantillonnage
automatiques (échantillonneurs) pour l'eau et les eaux usées
Ta slovenski standard je istoveten z: prEN 16479
ICS:
13.060.45 Preiskava vode na splošno Examination of water in
general
oSIST prEN 16479:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 16479:2022
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oSIST prEN 16479:2022
DRAFT
EUROPEAN STANDARD
prEN 16479
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2021
ICS 13.060.45 Will supersede EN 16479:2014
English Version
Water quality - Performance requirements and conformity
test procedures for water monitoring equipment -
Automated sampling devices (samplers) for water and
waste water

Qualité de l'eau - Exigences de performance et modes Wasserbeschaffenheit - Leistungsanforderungen und

opératoires d'essai de conformité pour les Konformitätsprüfungen für Geräte zum

équipements de surveillance de l'eau - Dispositifs Wassermonitoring - Automatische Probenahmegeräte

d'échantillonnage automatiques (échantillonneurs) für Wasser und Abwasser
pour l'eau et les eaux usées

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 230.

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

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16479:2021 E

worldwide for CEN national Members.
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prEN 16479:2021 (E)
Contents Page

European foreword ............................................................................................................................................. 3

Introduction .......................................................................................................................................................... 4

1 Scope .......................................................................................................................................................... 5

2 Normative references .......................................................................................................................... 5

3 Terms and definitions ......................................................................................................................... 5

4 General requirements for samplers ............................................................................................... 8

5 Performance requirements .............................................................................................................11

5.1 Sample volume .....................................................................................................................................11

5.2 Sampling principles ............................................................................................................................11

5.3 Sample line velocity............................................................................................................................11

5.4 Power supply ........................................................................................................................................11

5.5 Sample integrity ..................................................................................................................................11

5.6 Sample timing error ...........................................................................................................................12

5.7 Effect of ambient air temperature ................................................................................................12

5.7.1 Samplers not incorporating sample temperature control ...................................................12

5.7.2 Samplers incorporating sample temperature control ..........................................................12

6 Conformity testing ..............................................................................................................................13

6.1 General requirements .......................................................................................................................13

6.2 Test conditions .....................................................................................................................................13

6.3 Verification by inspection ................................................................................................................14

6.4 Performance tests ...............................................................................................................................14

6.4.1 Collected sample volume ..................................................................................................................14

6.4.2 Testing of sampling principles .......................................................................................................16

6.4.3 Sample line velocity............................................................................................................................17

6.4.4 Power supply test ................................................................................................................................18

6.4.5 Sample integrity ..................................................................................................................................19

6.4.6 Sampler timing error .........................................................................................................................20

6.4.7 Ambient air temperature effects ...................................................................................................20

Annex A (normative) Evaluation of conformity test data ....................................................................23

Annex B (informative) Example calculations ...........................................................................................28

Annex C (informative) Example procedure for demonstrating sample integrity for samplers

to be used for Urban Waste Water Treatment Directive (UWWTD) sampling .............41

Annex D (informative) Example format for the report .........................................................................43

Bibliography ........................................................................................................................................................46

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European foreword

This document (prEN 16479:2021) has been prepared by Technical Committee CEN/TC 230 “Water

analysis”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 16479:2014.
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Introduction

This document is a product standard for automatic sampling devices (samplers) for water and waste

water. It defines general requirements, performance requirements, and procedures for the conformity

testing of samplers.

The general requirements include functional facilities that samplers need to meet users’ applications and

information that needs to be included in associated documents. Conformity with these requirements is

verified by inspection. The performance requirements define the capability of a sampler to collect

samples of water reliably. Conformity with these requirements is determined by testing carried out in a

laboratory under controlled conditions. Statistical procedures are defined for evaluation of the

conformity test data and some example calculations are provided.
[1]

These requirements and statistical procedures take into account those specified in ISO 5667-10:2020

for automatic samplers. Samplers that are shown, by means of the tests, to conform to the requirements

specified in this document are considered to be fit for purpose. However, this document does not cover

the installation and on-going use of samplers.
[2]

This document is associated with EN 17075 which covers measuring devices for water and waste

water.

Automatic sampling devices are widely used for compliance monitoring purposes under national and

European regulations. This document supports the requirements of the following EU Directives:

— Industrial Emissions Directive (2010/75/EU) [3].
— Urban Waste Water Treatment Directive (UWWTD) (91/271/EEC and 98/15/EEC) [4].
— Water Framework Directive (2000/60/EC) [5].
— Marine Strategy Framework Directive (2008/56/EC) [6].

The use of an automatic sampling device, for example in a hazardous environment, can also be subject to

national, European and international rules and legislation governing the safety of products.

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1 Scope

This document defines general requirements, performance requirements and conformity test procedures

for automatic sampling devices (samplers) for water and waste water that:

— sample water and waste water from non-pressurized (i.e. open to atmosphere) channels or vessels;

— sample over extended periods to collect discrete or composite samples based on time, event or flow

proportional sampling.
It does not include sampling systems built into online and in-line analysers.

The general requirements include functional facilities that samplers need to meet users’ applications and

information that needs to be included in associated documents.

The test procedures specify uniform methods to be used when determining key performance

characteristics of samplers. All of the test procedures are expected to be carried out under laboratory

conditions. It is recognized that for some samplers certain test procedures are not applicable.

Statistical procedures are defined for evaluation of the test data. Some example calculations are provided.

Specific sample integrity requirements are defined for samplers to be used for the collection of samples

of final effluent or influent for the purpose of monitoring the performance of waste water treatment

works, as required under the EU’s Urban Waste Water Treatment Directive (UWWTD). Samplers to be

used for other industrial applications do not need to be assessed against these specific sample integrity

requirements.
This document does not cover the installation and on-going use of samplers.
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 ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories

(ISO/IEC 17025)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
automatic sampling device for water and waste water
automatic sampler

equipment for collecting and storing samples of water or waste water for subsequent laboratory analysis

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3.2
bias
estimate of a systematic measurement error

Note 1 to entry: The systematic measurement error is a component of measurement error that in replicate

measurements remains constant or varies in a predictable manner.

[SOURCE: ISO/IEC Guide 99:2007, 2.18, modified — Note 1 to entry has been added.]

3.3
composite sample

two or more samples or sub-samples, mixed together in appropriate known proportions (either

discretely or continuously), from which the average value of a desired characteristic may be obtained

Note 1 to entry: The proportions are usually based on time or flow measurements.
[SOURCE: ISO 6107:2021, 3.126]
3.4
constant volume variable time sampling
C.V.V.T.

flow proportional sampling based on collecting equal volumes of sample at frequencies proportional to

flow
3.5
constant time variable volume sampling
C.T.V.V.

flow proportional sampling based on collecting samples at fixed time intervals but where the volume of

sample is varied in proportion to the flow
3.6
constant time constant volume sampling
C.T.C.V.
equal volumes of sample or sub-sample collected at equal increments of time
3.7
determinand

property/substance that is required to be measured and to be reflected by/present in a calibration

solution
[SOURCE: EN ISO 15839:2006, 3.13]
3.8
discrete sample
single sample taken from a body of water
[SOURCE: ISO 6107:2021, 3.183, modified — “process, whereby” deleted]
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3.9
measurement error
error of measurement
error
measured quantity value minus a reference quantity value
Note 1 to entry: The concept of “measurement error” can be used both:

a) when there is a single reference quantity value to refer to, which occurs if a calibration is made by means

of a measurement standard with a measured quantity value having a negligible measurement uncertainty or if

a conventional quantity value is given, in which case the measurement error is known, and

b) if a measurand is supposed to be represented by a unique true quantity value or a set of true quantity values

of negligible range, in which case the measurement error is not known.

Note 2 to entry: "Measurement error" is not to be confused with production error or mistake.

[SOURCE: ISO/IEC Guide 99:2007, 2.16]
3.10
rated operating conditions

minimum to maximum values of any environmental, fluid or electrical parameter within which the

sampler is designed to operate without adjustment and with errors within performance limits

3.11
lift height

vertical distance between the surface of the water being sampled and the highest point to which the

sample is lifted
Note 1 to entry: Sometimes called “sampling head” or “suction height”.

Note 2 to entry: The maximum lift height for samplers using vacuum pumps (e.g. pneumatic samplers and

peristaltic samplers) is set to an atmospheric pressure of 1 000 mbar. At low atmospheric pressure the maximum

lift height will be consequentially lower.
3.12
measurement repeatability
repeatability
measurement precision under a set of repeatability conditions of measurement
[SOURCE: ISO/IEC Guide 99:2007, 2.21]
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3.13
repeatability condition of measurement
repeatability condition

condition of measurement, out of a set of conditions that includes the same measurement procedure,

same operators, same measuring system, same operating conditions and same location, and replicate

measurements on the same or similar objects over a short period of time

Note 1 to entry: A condition of measurement is a repeatability condition only with respect to a specified set of

repeatability conditions.

Note 2 to entry: In chemistry, the term “intra-serial precision condition of measurement” is sometimes used to

designate this concept.
[SOURCE: ISO/IEC Guide 99:2007, 2.20]
3.14
precision

closeness of agreement between indications or measured quantity values obtained by replicate

measurements on the same or similar objects under specified conditions

Note 1 to entry: Measurement precision is usually expressed numerically by measures of imprecision, such as

standard deviation, variance, or coefficient of variation under specified conditions of measurement.

Note 2 to entry: The “specified conditions” can be, for example, repeatability conditions of measurement,

intermediate precision conditions of measurement, or reproducibility conditions of measurement (see

ISO 5725-3:1994).

Note 3 to entry: Measurement precision is used to define measurement repeatability, intermediate measurement

precision, and measurement reproducibility.

Note 4 to entry: Sometimes “measurement precision” is erroneously used to mean measurement accuracy.

[SOURCE: ISO/IEC Guide 99:2007, 2.15]
3.15
sampling interval
time between successive sampling events
3.16
sampling line
conduit from intake point to inlet of dosing system

[SOURCE: ISO 6107:2021, 3.494, modified — “sampling probe” was replaced by “intake point” and

delivery point was replaced by “inlet of dosing system”]
4 General requirements for samplers
See 6.3 for details on verification by inspection.
A sampler shall:

a) have an unique designation that unambiguously identifies it (e.g. model, serial number);

b) be designed (including its operating methodology) and constructed to ensure that the composition

of the sample is, as far as is practicable, not altered by the sampling procedure.

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It can be impracticable to prevent the loss of volatile substances during sampling with vacuum and

peristaltic samplers.

c) have a rated maximum lift height at which all of the performance requirements of this standard are

fulfilled. The rated maximum lift height shall be inscribed on the sampler or declared in the operating

manual published by the manufacturer;

Conformity testing of the sampler shall be based on a range of lift heights up to and including the

sampler’s rated maximum lift height.
d) have provision for the user to set the volume of a discrete sample;

e) have rated minimum and maximum sample volumes of a discrete sample inscribed on the sampler

or declared in the operating manual published by the manufacturer;

f) have the stated capacities, for any integrated sample storage, both by number(s) and volume(s) of

individual bottles and of a composite container, inscribed on the sampler or declared in the operating

manual published by the manufacturer;

g) be capable of collecting a series of samples, on a timed, event and/or a flow proportional basis.

Samples can be collected and stored in individual bottles or a single composite sample bottle;

h) have its possible sampling intervals inscribed on the sampler or declared in the operating manual

published by the manufacturer;

i) have provision for the user to set the sample interval as a minimum in the range 5 min to 1 h with

increments of 1 min, for time proportional samplers;

j) have provision for the sample interval (in the case of C.V.V.T. sampling) or the sample volume (in the

case of C.T.V.V. sampling) to be set on the basis of a flow signal (e.g. pulse or analogue) from a flow

meter. For pulse inputs, the relationship between pulse input and sample interval or volume should

be adjustable as a minimum over the range 1 pulse to 999 pulses in increments of 1 pulse;

k) have a control unit capable of recording sample collection failures;

l) have a control unit capable of recording any low battery alarm during sample collection;

m) be designed to minimize the possibility of clogging of the sample line by suspended solids in waste

water. The nominal internal diameter of the sample line shall be not less than 9 mm and the average

sample line velocity shall not be less than 0,5 m/s. The sampler shall be capable of achieving this

average sample line velocity at all lift heights up to and including its maximum rated lift height at all

rated operating voltages.

The requirement on sample line diameter excludes pipe restriction caused by the normal operation of

pinch valves and peristaltic pumps.

National legal requirements can specify different minimum values for internal sample line diameter and

average sample line velocity. These may need to be taken into account.

n) be capable of purging the contents of the sampling line between each sampling event;

o) have stated ingress protection (IP) rating inscribed on the sampler or stated in the operating manual.

[7]
Requirements for ingress protection are detailed in EN 60529:1991
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p) have a rated sample water and/or waste water temperature range of at least +1 °C to +25 °C” at

which all of the performance requirements of this standard are met. The rated temperature range

shall be inscribed on the sampler or declared in the operating manual published by the manufacturer.

q) have rated minimum and maximum voltages at which all of the performance requirements of this

standard that are relevant to the sampler are met. The rated minimum and maximum operating

voltages shall be inscribed on the sampler or declared in the operating manual published by the

manufacturer.
The possible sampling options are illustrated in Figure 1.
Key
Q discharge
t time
a) flow rate curve
b) C.T.C.V. time proportional sampling
c) C.V.V.T. flow proportional sampling
d) C.T.V.V. flow proportional sampling
Figure 1 — Sampling options
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5 Performance requirements
5.1 Sample volume

The bias of the collected sample volume shall not be greater than 5 % of the set volume over the tested

range for lift height.

The repeatability of the collected sample volume shall not be greater than 5 %, expressed as the

repeatability variation coefficient at the 95 % confidence limit, for the set volume over the tested range

for lift height.

The set volume for the conformity tests is 250 ml (or the stated maximum sample volume if less than

250 ml). However, these performance requirements also apply to additional set volumes between 50 ml

and 250 ml selected for test 6.4.1.1 and the set volumes selected for test 6.4.1.2.

NOTE Details of how to calculate bias and repeatability are given in Annex A. Example calculations are detailed

in Annex B.
5.2 Sampling principles
See conformity tests 6.4.2.2, 6.4.2.3, 6.4.2.4 and 6.4.2.5.

The performance of the sampling principle shall be tested and the results reported. The timing error for

each operating principle shall not be greater than 1 %.
Event triggered timing error

The sampler shall start sample extraction, unless it is already doing so, within 10 s of a trigger signal

being received from an external input.
5.3 Sample line velocity
See conformity test 6.4.3.

The mean velocity of the sample water as it passes through the sample line during the sampling event

shall not be less than 0,5 m/s at each tested lift height and at the rated voltage for the power supply.

NOTE 1 An example calculation of sample line velocity is given in Annex B.

NOTE 2 National legal requirements can specify different minimum values for internal sample line diameter and

mean sample line velocity and these possibly need to be taken into account.
5.4 Power supply
See conformity test 6.4.4.

The mean velocity of the sample water as it passes through the sample line during the sampling event

shall not be less than 0,5 m/s between the minimum and maximum rated voltages for the power supply.

NOTE An example calculation of sample line velocity is given in Annex B.
5.5 Sample integrity
See conformity test 6.4.5 and the example procedure at Annex C.

Analyses for BOD (biochemical oxygen demand), COD (chemical oxygen demand), total nitrogen, and

total phosphorus in samples taken by the sampler and in samples taken manually from a test water

representative of a waste water from an urban waste water treatment plant in accordance with the

conformity test detailed in 6.4.5 shall show no significant statistical difference based on an analysis of

variance.
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NOTE Details of how to calculate sample integrity using analysis of variance are given in Annex A. An example

calculation is detailed in Annex B.

The design of a sample integrity test for other applications shall be based on the procedure at 6.4.5 and

[8]

the example given at Annex C. The guidance given in EN ISO 5667-3 , for sample handling and

preservation of samples should also be taken into account. This guidance covers samples for both

physical and chemical examination, and for biological examination. The same pass criteria should be

applied when using a test water representative of a waste water from an application other than an urban

waste water treatment plant and for which relevant determinands have been identified.

5.6 Sample timing error
See conformity test 6.4.6.

The error of the sampler interval timing mechanism shall not be greater than ± 10 s per 24 h.

NOTE An example calculation of sample timing error is given in Annex B.
5.7 Effect of ambient air temperature
5.7.1 Samplers not incorporating sample temperature control
See conformity test 6.4.7.

Samplers which do not incorporate a means for maintaining the temperature of the sample within pre-

set limits shall conform to the sample volume performance requirements in 5.1 when operated within

one of the following sets of rated operating conditions with regards to ambient temperature:

a) from +5 °C to +40 °C; or
b) from −10 °C to +40 °C.
c) from 0 °C to +40 °C.

Temperature range a) should be used for samplers designed without integral frost protection and for use

only indoors where the building provides protection from frost.

Temperature range b) should be used for samplers designed for use outdoors and which have integral

frost protection.

Temperature range c) should be used for samplers designed for use outdoors and which have no integral

frost protection.

NOTE Details of how to calculate bias, repeatability and expanded uncertainty are given in Annex A. An

example calculation is detailed in Annex B.
5.7.2 Samplers incorporating sample temperature control
See conformity test 6.4.7.

Samplers which incorporate a means for maintaining the temperature of the collected sample within pre-

set limits shall conform to the sample volume performance requirements in 5.1 when operated within an

ambient temperature range from −10 °C to +40 °C.

The mean temperature of the collected sample shall be maintained within the range 0 °C to 5 °C during

the sampling period, when the sampler is operated within the rated operating conditions for ambient

temperature and process water or waste water temperature. The design of the sample temperature

control shall ensure that ice does not form in the collected sample.
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oSIST prEN 16479:2022
prEN 16479:2021 (E)

In the case of mains powered samplers, after completion of the sampling period, the sample temperature

shall remain within the range 0 °C to 5 °C for a minimum period of 24 h. The design of the sample

temperature control shall ensure that ice does not form in the collected sample.

In the case of portable samplers which are not powered directly from a mains electricity supply, the

minimum period of time, from the end of the sampling period, over which the temperature of the collected

sample remains within the range 0 °C to 5 °C with no formation of ice shall be 12 h.

NOTE Details of how to calculate bias and repeatability are given in Annex A. Example calculations are detailed

in Annex B.
6 Conformity testing
6.1 General requirements

The sampler shall be installed in accordance with any instructions provided by the manufacturer.

Each performance requirement f
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