SIST EN 50436-1:2023

SLOVENSKI STANDARD
01-september-2023
Alkoholne zapore - Preskusne metode in zahtevane lastnosti - 1. del: Instrumenti z
ustnikom in merilnikom alkohola v izdihanem zraku za uporabo v programih proti
pijanim voznikom in za splošno preventivno uporabo
Alcohol interlocks - Test methods and performance requirements - Part 1: Instruments
having a mouthpiece and measuring breath alcohol for drink-driving-offender programs
and general preventive use
Alkohol-Interlocks - Prüfverfahren und Anforderungen an das Betriebsverhalten - Teil 1:
Geräte mit Mundstück zur Messung des Atemalkohols für Programme mit
Trunkenheitsfahrern und für den allgemein-präventiven Einsatz
Ethylotests antidémarrage - Méthodes d'essais et exigences de performance - Partie 1:
Appareils équipés d'un embout qui mesurent le taux d'alcoolémie dans l'air expiré, pour
programmes de lutte contre la conduite en état d'ivresse et à usage préventif général
Ta slovenski standard je istoveten z: EN 50436-1:2023
ICS:
13.200 Preprečevanje nesreč in Accident and disaster control
katastrof
43.040.80 Sistemi za zaščito pri trku in Crash protection and
sistemi za zadrževanje restraint systems
potnikov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50436-1
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2023
ICS 43.040.10; 71.040.40 Supersedes EN 50436-2:2014; EN 50436-1:2014; EN
50436-2:2014/A1:2015; EN 50436-1:2014/AC:2016-03
English Version
Alcohol interlocks - Test methods and performance requirements
- Part 1: Instruments having a mouthpiece and measuring breath
alcohol for drink-driving-offender programs and general
preventive use
Ethylotests antidémarrage - Méthodes d'essais et Alkohol-Interlocks - Prüfverfahren und Anforderungen an
exigences de performance - Partie 1: Appareils équipés das Betriebsverhalten - Teil 1: Geräte mit Mundstück zur
d'un embout qui mesurent le taux d'alcoolémie dans l'air Messung des Atemalkohols für Programme mit
expiré, pour programmes de lutte contre la conduite en état Trunkenheitsfahrern und für den allgemein-präventiven
d'ivresse et à usage préventif général Einsatz
This European Standard was approved by CENELEC on 2023-06-19. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50436-1:2023 E
Contents Page
European foreword . 5
Introduction . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 General requirements . 12
4.1 Blocking and not-blocking . 12
4.2 Influence on the vehicle motor . 12
4.3 Tampering . 12
4.4 Concentration limit . 12
4.5 Mouthpiece . 12
4.6 Ready for test . 12
4.7 Data memory, download and data protection . 12
4.8 Retest . 13
4.9 Recall . 13
4.10 Override and bypass . 13
4.11 Combination with other systems . 13
4.12 Communication integrity . 14
4.13 Wireless communication . 14
4.14 User Interface . 14
5 General test methods . 14
5.1 Devices under test . 14
5.2 Preparation of alcohol interlock before testing . 15
5.3 Sequence of tests . 15
5.3.1 Alcohol interlock . 15
5.3.2 Accessory devices . 15
5.4 Normal conditions for tests . 15
5.5 Functional test . 16
6 Electrical tests . 17
6.1 General . 17
6.2 Supply voltage . 17
6.3 Excess supply voltage . 17
6.4 Short-circuit . 17
6.5 Reversed polarity . 18
6.6 Low-power-consumption state . 18
6.7 Electrical disturbances . 18
6.7.1 General . 18
6.7.2 Supply lines . 18
6.7.3 Lines other than supply lines . 19
6.8 Electrostatic discharge . 19
6.9 Electromagnetic compatibility . 19
6.10 Functional test under normal conditions . 19
7 Calibration curve . 19
8 Durability tests. 20
8.1 Temperature cycles . 20
8.2 Condensed water . 20
8.3 Vibrations . 20
8.4 Drop test . 20
9 Environmental tests . 20
9.1 General . 20
9.2 Temperature . 21
9.3 Temperature and supply voltage . 21
9.4 Temperature and humidity . 21
9.5 Warm-up time . 22
9.5.1 Temperature 20 °C . 22
9.5.2 Temperature -5 °C . 22
9.5.3 Temperature -20 °C . 22
9.6 Pressure . 23
9.7 Protection by enclosure . 23
10 Breath sample . 23
10.1 Volume . 23
10.2 Flow . 23
10.3 Exhalation time . 24
10.4 Response time . 24
11 Analytical specificity . 24
11.1 Test gases . 24
11.2 Cigarette smoke . 25
12 Manipulation and circumvention . 25
12.1 General . 25
12.2 Pressurized air . 25
12.3 Providing the sample with a mouthpiece attached . 25
12.4 Providing the sample without a mouthpiece attached . 26
12.5 Obstruction of the mouthpiece . 26
12.6 Filter . 27
12.6.1 Tube Filter . 27
12.6.2 Disc Filter . 27
12.7 Condensation . 27
12.8 Water . 27
12.9 Putting out of service . 27
12.10 Removal of handset . 28
12.11 Bypass . 28
13 Timer . 28
13.1 General . 28
13.2 Start period . 29
13.3 Restart period . 29
13.4 Service reminder . 29
13.5 Calibration interval . 29
14 Long term behaviour . 29
15 Instructions . 30
15.1 Instructions for installation . 30
15.2 Instructions for use . 31
15.3 Instructions for servicing the alcohol interlock . 31
16 Test report . 32
17 Labelling and marking . 32
Annex A (normative) Description of events . 33
Annex B (informative) Performance testing . 37
Bibliography . 38
European foreword
This document (EN 50436-1:2023) has been prepared by CLC/BTTF 116-2 “Alcohol Interlocks”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2024-06-19
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2026-06-19
conflicting with this document have to be
withdrawn
This document supersedes EN 50436-1:2014 and EN 50436-2:2014 and all of their amendments and
corrigenda (if any).
EN 50436-2:2014:
— EN 50436-2 was integrated into EN 50436-1 and all essential requirements incorporated into EN 50436-1;
— Clause 1, Scope, was updated to consider the requirements from Part 2;
— Clause 3, Terms and definitions, definitions were added for immobiliser, alcohol interlock, digital interface,
low-power-consumption state and handset. Some existing definitions were updated;
— Clause 4, General requirements, was updated to reflect current communication requirements;
— Clause 6.6, Low-power-consumption state, the current in low-power-consumption state of the alcohol
interlock was changed from 5 mA to 1 mA at 12 V and at 24 V;
— Clause 6.7, Electrical disturbances, was updated;
— Clause 6.7.2, Supply lines, test levels were adjusted;
— Clause 6.9, Electromagnetic compatibility, both notes were integrated into one note with reference to the
EMC and RED Directives;
— Clause 7, Calibration curve, the tolerance was changed from ± 0,02 mg/l or ± 15 % of the nominal value
to ± 0,02 mg/l or ± 10 % of the nominal value;
— Clause 8.4, Drop test, a description for the handset was added;
— Clause 9, Environmental test, the procedure for the test was revised and tolerances added where
necessary;
— Clause 10, Breath sample, was revised to add tolerances to the test gas flow;
— Clause 11.1, Test gases, carbon dioxide was added;
— Clause 12.6, Filter, the complete clause was updated to distinguish between tube filter and disc filter;
— Clause 12.6.1, Tube Filter, the charcoal was specífied to a mixture of pieces with diameters of 5 mm to
8 mm;
— Clause 12.7, Condensation, the clause was updated;
— Clause 12.8, Water, the clause was updated;
— Clause 12.10, Removal of handset, two additional tests were added;
— Clause 15.1, Instructions for installation, a note with the reference to EN 50436-7 was added;
— Clause 17, Labelling and marking, further requirements were added.
Introduction
The purpose of alcohol interlocks is to enhance traffic safety by preventing persons with alcohol concentrations
exceeding a set limit value from driving a motor vehicle. The EN 50436 series specifies test methods and
essential performance requirements for alcohol interlocks and gives guidance for decision makers, purchasers
and users.
The content and requirements of this part of EN 50436 are based on the experience and necessities of using
aIcohol interlocks to prevent drink driving in several countries over several decades.
Therefore, alcohol interlocks to be used in all general preventive programmes and those for drink driving
offenders and legally regulated programmes monitored or controlled in a comparable way should comply with
this document.
Part 3 of this series of standards gives information on how to implement the usage of alcohol interlocks.
The purpose of the EN 50436 series is to specify essential performance requirements and to provide the
respective test methods for available technologies. The technology of alcohol interlocks continues to evolve,
and further innovations can be expected. These could be considered in new parts or revisions of this
document.
1 Scope
This document specifies test methods and performance requirements for alcohol interlocks having a
mouthpiece. It covers alcohol interlocks to be used in all general preventive programmes and those for drink
driving offenders and legally regulated programmes monitored or controlled in a comparable way.
This document can also be used for alcohol interlocks intended for other applications.
This document is directed at test laboratories and manufacturers of alcohol interlocks. It defines requirements
and test procedures for type testing.
Several parameters (such as alcohol concentration or breath volume) are specified in this document for the
purpose of type testing according to this document only.
NOTE It can be necessary due to national regulations or depending on user requests to set the values of the
prescribed parameters differently when the alcohol interlocks are in use.
This document also applies to alcohol interlocks integrated into control systems of the vehicle as well as to
accessory devices connected to the alcohol interlock.
This document does not apply to
— instruments measuring the alcohol concentration in the ambient air in the vehicle,
— alcohol interlocks not having a mouthpiece,
— methods of installation and connections to the vehicle.
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 50436-4, Alcohol interlocks — Test methods and performance requirements — Part 4: Connection and
digital interface between the alcohol interlock and the vehicle
EN 60068-2-78, Environmental testing — Part 2-78: Tests — Test Cab: Damp heat, steady state
(IEC 60068-2-78)
EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529)
ISO 7637-2, Road vehicles — Electrical disturbances from conduction and coupling — Part 2: Electrical
transient conduction along supply lines only
ISO 7637-3, Road vehicles — Electrical disturbances from conduction and coupling — Part 3: Electrical
transient transmission by capacitive and inductive coupling via lines other than supply lines
ISO 10605, Road vehicles — Test methods for electrical disturbances from electrostatic discharge
ISO 16750-1, Road vehicles — Environmental conditions and testing for electrical and electronic equipment —
Part 1: General
ISO 16750-2:2012, Road vehicles — Environmental conditions and testing for electrical and electronic
equipment — Part 2: Electrical loads
ISO 16750-3:2012, Road vehicles — Environmental conditions and testing for electrical and electronic
equipment — Part 3: Mechanical loads
ISO 16750-4:2010, Road vehicles — Environmental conditions and testing for electrical and electronic
equipment — Part 4: Climatic loads
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 50436-4 and the following apply.
3.1
immobiliser
device which is intended to prevent the vehicle being driven powered by its own motor
Note 1 to entry: In this document the expression motor includes combustion engine, electric motor or hybrid power
unit.
3.2
alcohol interlock
device that acts as a vehicle immobiliser which, when installed, can be brought into the not blocking state only
after the presentation and analysis of an accepted breath sample with an alcohol concentration below a limit
value
3.3
breath sample
breath sample taken under forced expiration
3.4
accepted breath sample
breath sample fulfilling set requirements for volume, flow, exhalation time and other human breath sample
characteristics
Note 1 to entry: The acceptance of a breath sample is independent from the breath test alcohol concentration result.
3.5
not accepted breath sample
breath sample that does not fulfil the set requirements or is otherwise aborted by the device
3.6
breath alcohol concentration
mass concentration of ethanol, expressed in mg/l (milligram ethanol per litre breath), in a breath sample
delivered into an alcohol interlock
3.7
breath alcohol concentration limit
set value of breath alcohol concentration at or above which the alcohol interlock records a fail test result
3.8
breath test
providing a breath sample to an alcohol interlock
3.9
pass test
breath test provided with a measured breath alcohol concentration below the breath alcohol concentration limit
3.10
fail test
breath test provided with a measured breath alcohol concentration at or above the breath alcohol
concentration limit
3.11
mouthpiece
part through which the breath sample is delivered into the alcohol interlock
3.12
blocking state
state in which the alcohol interlock immobilises the vehicle
3.13
not-blocking state
state in which the alcohol interlock does not immobilise the vehicle
3.14
ready for test
indication that the operating parameters of the alcohol interlock are met
3.15
warm-up time
time interval after the activation of the the alcohol interlock until the internal components of the device reach a
minimum operating temperature
3.16
initial test
breath test provided while the alcohol interlock is in the blocking state
3.17
retest
breath test provided while the alcohol interlock is in the not-blocking state
Note 1 to entry: The retest function is one of the measures used in the detection of circumvention.
3.18
retest period
time interval after the retest request to provide an accepted breath sample
3.19
start period
time interval after an accepted breath sample has been delivered with a pass test result during which the
alcohol interlock remains in the not-blocking state
3.20
restart period
time interval after the ignition switch or equivalent is switched off and during which the alcohol interlock
remains in the not-blocking state
3.21
override
permissible method of causing the alcohol interlock to enter the not-blocking state without providing a breath
sample
Note 1 to entry: The override function is for use in exceptional circumstances only.
3.22
bypass
unauthorised method of causing the vehicle to ignore the alcohol interlock blocking state
3.23
tampering
unauthorised change to or interference with the installation or function of the alcohol interlock in the vehicle
3.24
data memory
record of breath test results and other events with date and time stored in the internal memory of the alcohol
interlock
3.25
supply voltage
voltage obtained from the electric power source of the vehicle for operation of the alcohol interlock
3.26
calibration interval
time period between calibrations during which the alcohol interlock fulfils the accuracy requirements for the
measurement of the breath alcohol concentration
3.27
service reminder
notification by the alcohol interlock of a pending service requirement
3.28
recall
notification by the alcohol interlock of an early service requirement
3.29
manufacturer
person or body that is responsible for the design, construction and/or production of the alcohol interlock and is
responsible for the conformity of production
3.30
aftermarket installation
any installation of an alcohol interlock in a vehicle after the original production of a vehicle
3.31
digital interface
shared boundary used for the exchange of information between devices
3.32
low-power-consumption state
state in which the alcohol interlock draws the minimum power from the vehicle while being responsive to an
activation signal for operation
3.33
handset
component of the alcohol interlock into which the breath sample is delivered through the mouthpiece
3.34
lockout
condition in which the alcohol interlock will not accept a breath sample and remains in the blocking state
4 General requirements
4.1 Blocking and not-blocking
Not-blocking state shall be achieved after delivery and analysis of an accepted breath sample with a breath
alcohol concentration below a limit value.
The alcohol interlock shall return to the blocking state after expiration of the restart period (see 13.3) without
supplementary action from the driver.
4.2 Influence on the vehicle motor
The alcohol interlock shall not cause a running vehicle motor to stop, even in the case of a missed or a failed
retest.
4.3 Tampering
The alcohol interlock shall be designed and manufactured such that, when installed in a vehicle, according to
the manufacturer‘s instructions, it cannot be opened or the electrical connection cannot be modified without
visible changes.
The access to the data memory or to means for setting parameters or to adjustment possibilities shall be
designed so as to deter unauthorised or inadvertent interference.
4.4 Concentration limit
The nominal breath alcohol concentration limit of the alcohol interlock shall be at least 0,09 mg/l.
NOTE There is a limitation for the lower limit of the detection of alcohol concentrations in breath due to technological
and physiological reasons. Effectively, the lower limit for a reliable measurement of breath alcohol concentrations is
0,09 mg/l.
4.5 Mouthpiece
The alcohol interlock shall have an exchangeable mouthpiece.
4.6 Ready for test
The alcohol interlock shall provide an indication when it is ready to accept a breath test. This indication may be
visual, audible or digital. A breath test shall only be accepted after a ready for breath test indication.
4.7 Data memory, download and data protection
The alcohol interlock shall be capable of recording events with date and time in the data memory as a
minimum as listed in Annex A. These events are at least the following:
— breath samples,
— test results,
— blocking and not-blocking,
— information about the use of the vehicle, such as motor start and stop, vehicle motion or distance driven,
— missed retest,
— overriding and bypassing,
— handset exchange, if applicable,
— digital communication connections and disconnections,
— connections and disconnections of supply voltage,
— changing of parameters and adjustments,
— results of calibration, verification and/or readjustment.
The data shall be stored in a manner that will protect against loss or corruption.
It shall be possible to transfer the data from the alcohol interlock memory to an external database with
authorized access.
NOTE 1 The European General Data Protection Regulation gives the legal framework for collection, storage,
transmission and access to data.
NOTE 2 EN 50436-6 of this series of European Standards for alcohol interlocks addresses data encryption and data
protection.
4.8 Retest
The alcohol interlock shall be capable of requesting multiple retests. The retest request time intervals can
occur at fixed or random times and can be limited in time. The indication of the retest request may be visual,
audible or digital.
NOTE 1 National regulations can restrict the use of visual or audible signals.
During the retest requirement, the alcohol interlock shall remain in the not-blocking state until the expiration of
the restart period.
NOTE 2 National regulations can limit the time duration of the retest request time interval (see also Clause 13).
4.9 Recall
The alcohol interlock shall be capable of requesting an earlier service if certain events occur (for example
failed initial test, failed or missed retest, overriding, bypassing).
4.10 Override and bypass
An override function of the alcohol interlock is permissible in case of emergency or service.
A bypass shall be considered as a circumvention of the alcohol interlock according to 12.11.
It shall be possible to enable or to disable the parameter permitting the override function.
The alcohol interlock shall provide an indication when the override is engaged. This indication may be visual,
audible or digital.
It shall be possible to end the override mode.
It shall be possible to limit the number of overrides.
The occurrence of an override or a bypass, or of an attempt to engage an override or a bypass of the alcohol
interlock, shall be recorded in data memory.
4.11 Combination with other systems
The performance requirements specified in this document apply to alcohol interlocks that are stand-alone
instruments, combined with other vehicle systems or integrated into them (e.g. vehicle controller or telematic
systems).
Tests of different parts of the alcohol interlock may be performed separately, as to be agreed between the
manufacturer and the testing laboratory.
4.12 Communication integrity
For alcohol interlocks having a handset and an electronic control unit the communication between the handset
and the electronic control unit shall be encrypted to protect communication integrity and to prevent bypass of
the alcohol interlock.
NOTE EN 50436-6 of this series of European Standards for alcohol interlocks addresses data encryption and data
protection.
4.13 Wireless communication
If the handset and the electronic control unit of the alcohol interlock communicate wirelessly, the alcohol
interlock shall go into the not-blocking state not later than 30 s after delivery and analysis of an accepted
breath sample with a breath alcohol concentration below the limit value.
The maximum distance for the wireless communication between the handset and the electronic control unit
under free field conditions shall be 50 m.
4.14 User Interface
The user interface shall provide guidance that includes all necessary steps to lead the user through the
measuring procedure and to perform an accepted measurement. This includes all indications to signal each
step of the procedure and the correct interpretation of the result. At least the following shall be indicated:
— warm-up time interval;
— ready for test;
— retest request;
— accepted breath sample;
— not accepted breath sample;
— pass test result;
— start period;
— fail test result;
— lockout;
— restart period.
The indication may be visual, audible or digital.
5 General test methods
5.1 Devices under test
All the tests shall be carried out on two alcohol interlock devices. However, at the discretion of the test
laboratory additional devices may be used for individual tests conducted separately if these tests are not
considered to affect the results of the other tests.
Integrated batteries may be replaced or recharged before individual tests unless otherwise stated.
Accessory devices of the alcohol interlock authorized by the manufacturer as being part of the alcohol interlock
system and which are intended to be used in the vehicle during operation shall be tested according to this
document. For example cameras or GPS systems generating data related to event data of the alcohol
interlock, as well as accessory devices handling or transferring data for a drink-driving-offender programme
are to be tested. Systems that are only receiving data from the alcohol interlock, e.g. fleet management
systems, do not have to be tested according to this document.
NOTE National regulations can define which accessory devices have to be type tested.
All the tests shall be carried out on two devices of each accessory device. However, at the discretion of the
test laboratory additional devices may be used if this is not considered to affect the results of the other tests.
5.2 Preparation of alcohol interlock before testing
The alcohol interlock shall be calibrated and adjustments shall be carried out, if needed, at the beginning of the
test procedure and before the long-term stability test (see Clause 14) by the manufacturer or according to
written instructions provided by the manufacturer.
If the calibration interval given by the manufacturer expires during the test procedure, the alcohol interlock may
be calibrated and adjusted after the expiry, if necessary, with the exception of the durability tests (see
Clause 8) and the long-term stability test (see Clause 14).
With the exception of the tests for manipulation and circumvention (see Clause 12), the measures against
manipulation and circumvention may be de-activated for all tests.
5.3 Sequence of tests
5.3.1 Alcohol interlock
The alcohol interlock devices shall be tested according to the respective test procedures in the following
sequence: electrical tests (Clause 6), calibration curve (Clause 7), durability tests (Clause 8).
The sequence of the remaining tests may be agreed upon between the test laboratory and the manufacturer.
Tests according to Clauses 10 to 14 may be performed with two additional alcohol interlocks in parallel.
The type and order of tests to be conducted for continued certification of an alcohol interlock after notification
from the manufacturer that changes to the device were made in components, parts, manufacturing process or
function shall be determined by the testing laboratory.
The sequence of testing shall be recorded in the test report.
5.3.2 Accessory devices
The following tests shall be performed with the accessory devices connected to the alcohol interlock:
— tampering (4.3),
— data memory, download and evaluation (4.7), where applicable,
— electrical tests (Clause 6),
— durability (Clause 8), with drop test (8.4) applicable only for accessory devices intended to be removable
by the user,
— environmental tests (Clause 9) without pressure test (9.6).
After having passed the tests according to 5.3.2 the accessory devices shall perform as specified by the
manufacturer.
5.4 Normal conditions for tests
All tests shall be performed with the alcohol interlock connected to a power supply voltage and power-on under
the following normal conditions, unless otherwise stated:
— voltage: as specified by the manufacturer (nominal operating voltage ± 5 %) or with sufficiently charged
integrated batteries;
— ambient temperature: T = 23 °C ± 5 °C;
— ambient pressure: 98 kPa ± 20 kPa;
— ambient air humidity: 50 % RH ± 30 % RH;
— test gases:
— dry gases, temperature 23 °C ± 5 °C, or
— wet gases, temperature 34 °C ± 0,5 °C water bath must be stabilized to ± 0,2 °C;
— test gas flow: 0,25 l/s ± 0,05 l/s;
— uncertainty (k = 2), 95 % confidence, of test gas concentration: 2 % of the nominal test gas concentration;
— test gas volume: 1,5 l ± 10 %.
NOTE Wet gases are usually produced by at least two breath alcohol simulators operating in series, each with a
temperature control of the water bath within ± 0,1 °C and using alcohol reference solution with an ethanol concentration
within 0 to + 1% of the target ethanol concentration for the test.
5.5 Functional test
As specified in the respective clauses, tests shall be performed according to one of the following three test
types.
The limit value at or above which the alcohol interlock is blocking shall be adjusted to 0,25 mg/l for these tests.
NOTE The limit value of 0,25 mg/l is chosen to facilitate the test procedures and to differentiate between the
influence of disturbances and the uncertainty of the measurement results. Since calibration curve tests are performed at
concentrations ranging from 0,00 mg/l to 1,50 mg/l with accuracy requirements as specified, a limit value of 0,09 mg/l or
higher is supported by type testing of an alcohol interlock according to this document.
Test type 1
Test gas with an alcohol concentration of 0,30 mg/l shall be applied to the alcohol interlock successively
ten times in intervals of at least 3 min. The alcohol interlock shall remain in a blocking state in each test.
Test gas with an alcohol concentration of 0,20 mg/l shall be applied to the alcohol interlock successively
ten times in intervals of at least 3 min. The alcohol interlock shall go into a not-blocking state in each test.
Test type 2
Test gas with an alcohol concentration of 0,35 mg/l shall be applied to the alcohol interlock successively
ten times in intervals of at least 3 min. The alcohol interlock shall remain in a blocking state in each test.
Test gas with an alcohol concentration of 0,15 mg/l shall be applied to the alcohol interlock successively
ten times in intervals of at least 3 min. The alcohol interlock shall go into a not-blocking state in each test.
Test type 3
Test gas consisting of clean air shall be applied to the alcohol interlock successively ten times in intervals
of at least 3 min. No individual measurement of breath alcohol concentration shall be greater than
0,03 mg/l.
6 Electrical tests
6.1 General
If an alcohol interlock is combined with other vehicle systems or integrated into them, the vehicle manufacturer
may provide these test results.
For alcohol interlocks with 12 V to 24 V nominal operating voltage for one power input, the tests shall be
performed with the most severe of the voltage conditions.
6.2 Supply voltage
The alcohol interlock shall be tested for the influence of the supply voltage according to ISO 16750-2:2012, 4.2
with the following test conditions:
— the tests shall be performed with the alcohol interlock being ready to accept a breath sample,
— alcohol interlocks with 12 V nominal operating voltage: code C (9 V and 16 V),
— alcohol interlocks with 24 V nominal operating voltage: code F (16 V and 32 V).
The alcohol interlock shall under these conditions fulfil the requirements of functional test type 1 in 5.5 with
functional status A as defined in ISO 16750-1.
6.3 Excess supply voltage
a) An alcohol interlock with 12 V nominal operating voltage shall be subjected at 65 °C ambient temperature
to an excess supply voltage of 18 V for 60 min according to ISO 16750-2:2012, 4.3.1.1.
An alcohol interlock with 12 V nominal operating voltage shall be subjected at room temperature to an
excess supply voltage of 24 V for (60 ± 6) s according to ISO 16750-2:2012, 4.3.1.2.
The tests shall be performed with the alcohol interlock being ready to accept a breath sample.
The alcohol interlock shall fulfil functional status C as defined in ISO 16750-1 when tested according to
6.10.
b) An alcohol interlock with 24 V nominal operating voltage shall be subjected at 65 °C ambient temperature
to an excess supply voltage of 36 V for 60 min according to
...