EN 16479:2023

SLOVENSKI STANDARD
01-junij-2023
Nadomešča:
SIST EN 16479:2014
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: EN 16479:2023
ICS:
13.060.45 Preiskava vode na splošno Examination of water in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 16479
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2023
EUROPÄISCHE NORM
ICS 13.060.45 Supersedes EN 16479:2014
English Version
Water quality - Performance requirements and conformity
test procedures for water monitoring equipment -
Automatic 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 European Standard was approved by CEN on 27 February 2023.

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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16479:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 General requirements for samplers .10
5 Performance requirements .13
5.1 Sample volume .13
5.2 Sampling principles .13
5.3 Sample line velocity.13
5.4 Power supply .13
5.5 Sample integrity .13
5.6 Sample timing error .14
5.7 Effect of ambient air temperature .14
5.7.1 Samplers not incorporating sample temperature control .14
5.7.2 Samplers incorporating sample temperature control .14
6 Conformity testing .15
6.1 General requirements .15
6.2 Test conditions .15
6.3 Verification by inspection .16
6.4 Performance tests .16
6.4.1 Collected sample volume .16
6.4.2 Testing of sampling principles .17
6.4.3 Sample line velocity.19
6.4.4 Power supply test .19
6.4.5 Sample integrity .20
6.4.6 Sampler timing error .21
6.4.7 Ambient air temperature effects .21
Annex A (normative) Evaluation of conformity test data .24
A.1 Test 6.4.1.1 C.T.C.V. Time proportional sampling principle .24
A.1.1 Example calculation of sample volume bias and repeatability .24
A.2 Test 6.4.1.2 C.T.V.V. Flow proportional sampling principle .25
A.2.1 Calculation of set sample volume .25
A.2.2 Assessment of conformity .25
A.3 Test 6.4.2 Testing of sampling principles .25
A.3.1 Data reporting .25
A.3.2 Assessment of conformity .25
A.4 Test 6.4.3 Sample line velocity .25
A.4.1 Data reporting .25
A.4.2 Assessment of conformity .25
A.5 Test 6.4.4 Power supply test .26
A.5.1 Test 6.4.4.1 Data reporting . 26
A.5.2 Assessment of conformity . 26
A.5.3 Test 6.4.4.2 Data reporting . 26
A.5.4 Assessment of conformity . 26
A.6 Test 6.4.5 Sample integrity. 26
A.6.1 Calculation of results based on the analysis of variance . 26
A.6.2 Notation . 26
A.6.3 Calculations . 27
A.6.4 Interpretation of the results . 28
A.7 Test 6.4.6 Sampler timing error . 28
A.7.1 Calculation of elapsed time, timing error and normalization of timing error . 28
A.7.2 Assessment of conformity . 28
A.8 Test 6.4.7 Ambient air temperature effects . 29
A.8.1 Test 6.4.7.2 Volumetric test . 29
A.8.2 Assessment of conformity . 29
A.8.3 Test 6.4.7.3 Sample temperature control . 29
Annex B (informative) Example calculations . 30
B.1 General . 30
B.2 Test 6.4.1.1 C.T.C.V. Time proportional sampling principle. 30
B.2.1 Calculation of sample volume bias and repeatability . 30
B.2.2 Assessment of conformity . 32
B.3 Test 6.4.1.2 C.T.V.V. flow proportional sampling principle . 32
B.3.1 Calculation of sample volume bias and repeatability . 32
B.3.2 Assessment of conformity . 34
B.4 Tests 6.4.2 Sampling principles . 34
B.4.1 Test 6.4.2.2 C.T.C.V. sampling principle . 34

B.4.2 Test 6.4.2.3 C.V.V.T. sampling principle (impulse flow signal) . 35
B.4.3 Test 6.4.2.4 C.V.V.T. sampling principle (analogue flow signal) . 35
B.4.4 Test 6.4.2.5 event triggered sampling . 36
B.5 Test 6.4.3 Sample line velocity . 36
B.5.1 Data reporting . 36
B.5.2 Assessment of conformity . 37
B.6 Test 6.4.4 Power supply test . 37
B.6.1 Test 6.4.4.1 mains supply samplers . 37
B.6.2 Test 6.4.4.2 DC and battery powered samplers . 39
B.7 Test 6.4.5 Sample integrity. 40
B.7.1 Data reporting, intermediate calculations and an ANOVA calculation.40
B.7.2 Assessment of conformity .41
B.8 Test 6.4.6 Sampler timing error .42
B.8.1 Data reporting .42
B.8.2 Calculation of elapsed time, timing error and normalization of timing error .42
B.8.3 Assessment of conformity .42
B.9 Ambient air temperature effects .42
B.9.1 Volumetric test 6.4.7.2 .42
B.9.2 Sample temperature control test 6.4.7.3 .44
Annex C (informative) Example procedure for demonstrating sample integrity for samplers
to be used for monitoring the performance of urban waste water treatment works 45
C.1 General .45
C.2 Waste water .45
C.3 Sample collection .46
C.4 Sample volume .46
C.5 Sample integrity .46
C.6 Determination of conformance .46
Annex D (informative) Example format for the report .47
Bibliography .49

European foreword
This document (EN 16479:2023) has been prepared by Technical Committee CEN/TC 230 “Water
analysis”, 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 October 2023, and conflicting national standards shall
be withdrawn at the latest by October 2023.
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 16479:2014.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Türkiye and the United
Kingdom.
Introduction
This document is a product standard for automatic sampling devices (samplers) for water and waste
water. It specifies 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.
The sample volume over which the test procedures will be applied, the “set sample volume”, is not
specified. It is for the sampler manufacturer and/or the user to decide on the required set sample volume
taking into account varying national commercial markets and regulatory requirements.
These requirements and statistical procedures take into account those specified in ISO 5667-10:2020 [1]
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.
This document is associated with EN 17075 [2] which covers measuring devices for water and waste
water.
Automatic sampling devices are widely used for compliance monitoring purposes under national and
European regulations.
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.
1 Scope
This document specifies 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 at one or more set sample volume. It is for the sampler manufacturer and/or
user to decide on the required set sample volume(s). All of the test procedures are to be carried out under
laboratory conditions. It is recognized that for some samplers, certain test procedures are not applicable.
Statistical procedures are specified for evaluation of the test data. Some example calculations are
provided.
Specific sample integrity requirements are specified for samplers to be used for the collection of samples
of final effluent or influent for the purpose of monitoring the performance of urban waste water
treatment works. 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
There are no normative references in this document.
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
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
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.] [4]
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] [5]
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] [6]
3.8
discrete sample
single sample taken from a body of water
[SOURCE: ISO 6107:2021, 3.183, modified — “process, whereby” deleted] [5]
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] [4]
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] [4]
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] [4]
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 [4], 2.15] [4]
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”] [5]
4 General requirements for samplers
See 6.3 for details on verification by inspection.
A sampler shall:
a) have a 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;
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 document 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 set 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 can 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;
Requirements for ingress protection are detailed in EN 60529:1991 [7].
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 document 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
document 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
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 for set volumes greater than 100 ml shall not be greater
than 2,5 %, expressed as the repeatability variation coefficient, for the set volume over the tested range
for lift height.
The repeatability of the collected sample volume for set volumes less than or equal to 100 ml shall not be
greater than 4,0 %, expressed as the repeatability variation coefficient, for the set volume over the tested
range for lift height.
NOTE 1 The repeatability variation coefficient is expressed as the relative standard deviation.
NOTE 2 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 An example calculation of sample line velocity is given in Annex B.
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 in 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.
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
the example given in Annex C. The guidance given in EN ISO 5667-3 [8], 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; or
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 and repeatability 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.
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 for the sampler shall be considered on its own when performing the
conformity tests, except where otherwise indicated.
The test water used for each test shall be tap water, except for 6.4.5 when the test water shall be
representative of a waste water from an urban waste water treatment plant. This can be prepared using
tap water by following the guidance given at C.2.
Conformity testing of the sampler should be carried out in accordance with the requirements given in
EN ISO/IEC 17025 or other equivalent standards accepted at international level.
Sampler conformance shall be determined by evaluating the data from the tests in accordance with the
calculation methods given in Annex A.
Results from the conformity testing should be reported using the proposed format for the report given in
Annex D.
6.2 Test conditions
The sample line shall be arranged so that no part of the test water being sampled is retained within the
sample line.
Prior to carrying out any series of consecutive tests, the sampler shall be operated, for a total operating
period of 2 000 sampling cycles, under the following conditions:
— the rated maximum lift height;
— a sampling interval of 5 min;
— the set sample volume;
— collected samples can be re-used to save water consumption.
During tests that require the sampler to collect a sample of test water, the vessel containing the test water
to be sampled shall be open to the atmosphere.
Where a test requires repeat samples to be collected the lift height shall not change by more than 5 %
during the test.
In the case of a battery powered sampler, the battery shall be fully charged at the start of each conformity
test unless stated otherwise in the test conditions.
The sampler should be maintained, cleaned or recalibrated in accordance with the manufacturer's
instructions prior to any test, but adjustments shall not be carried out during the course of the test.
Table 1 gives the reference conditions for possible influence quantities. The sampler shall be tested with
all influence quantities at their reference values, including tolerances, unless where specifically varied in
any one test.
Table 1 — Test reference conditions
Influence quantity Reference value Tolerance
Ambient temperature 18 °C to 25 °C ±2,5 °C
Ambient humidity at 20 °C < 60 % —
Sample temperature 20 °C ±2,5 °C
a
Supply voltage (AC) 230 V (or 110 V) ±6 %
Supply voltage (DC) Rated voltage Rated voltage
a
see EN 60038:2011 [9].
6.3 Verification by inspection
The sampler shall be set up, calibrated and adjusted in accordance with the manufacturer’s instructions.
The sampler (or statements in the manufacturer’s operating manual) shall be inspected to verify
conformance to the general requirements listed at Clause 4, as appropriate to the sampler under test. The
means by which each requirement is fulfilled shall be reported.
6.4 Performance tests
6.4.1 Collected sample volume
6.4.1.1 C.T.C.V. Time proportional sampling principle
Determine the bias and repeatability of the collected sample volumes in accordance with the following
procedure.
1) Programme the sampler to collect the required set sample.
2) Set the sampler to operate on time proportional sampling.
3) Programme the sampler to collect 24 samples of the test water with a fixed 10 min interval at the set
sample volume.
4) Operate the sampler at a lift height of 1 m.
5) Measure and record the volume of each collected sample.
6) Repeat steps 3 to 7 at the rated maximum lift height and at half the rated maximum lift height. In each
case, measure and record the volume of each collected sample.
7) Calculate and report in accordance with Annex A. Example calculations are detailed at Annex B.
Where the sampler is to be tested at more than one set sample volume then steps 1 to 7 of the procedure
specified above shall be followed at each set sample volume.
These tests may be combined with the tests specified at 6.4.2.2 by recording the time at which the first
six samples are taken at a lift height of 1 m.
6.4.1.2 C.T.V.V. flow proportional sampling principle
Determine the bias and repeatability of the collected sample volumes in accordance with the following
procedure.
For samplers capable of operating with different input signals (analogue, pulse, digital) each input should
be tested separately.
1) Programme the sampler for the collection of C.T.V.V. flow proportional samples at a rate of 4 samples
per hour and a sample volume of 25 ml/m .
The procedure below assumes that the input to range has been programmed such that 100 % equals
3 3
100 m /h. The set sample volumes at 25 %, 50 %, 75 %, and 100 % of a programmed flow of 0 m /h to
100 m /h will be 156 ml, 313 ml, 469 ml and 625 ml respectively as detailed at Annex A.
2) Operate the sampler at a lift height of 1 m.
3) Apply a simulated flow signal representing 25 % of the maximum input signal until 6 individual
samples of the test water have been collected.
4) Sequentially increase the flow signal to represent flow rates of 50 %, 75 % and 100 % and in each
case collect six individual samples.
5) Calculate the set volume at each simulated flow rate in accordance with Annex A. Determine the
volume of each collected sample.
6) Repeat steps 1 to 5 for lift heights at the rated maximum lift height and at half the rated maximum
l
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