Alcohol interlocks - Test methods and performance requirements -- Part 2: Instruments having a mouthpiece and measuring breath alcohol for general preventive use

This European Standard specifies test methods and performance requirements for breath alcohol controlled alcohol interlocks having a mouthpiece. It covers alcohol interlocks intended for general preventive use. This European Standard is mainly directed to test laboratories and manufacturers for alcohol interlocks. It defines requirements and test procedures for type approval. Several parameters (as for example alcohol concentration or breath volume) are specified in this European Standard for the purpose of type testing according to this standard only. However, it may be necessary according to national regulations or depending on user requests to set the values of the prescribed parameters differently for use of the alcohol interlocks.

Alkohol-Interlocks - Prüfverfahren und Anforderungen an das Betriebsverhalten -- Teil 2: Geräte mit Mundstück zur Messung des Atemalkohols für den allgemein-präventiven Einsatz

Diese Europäische Norm legt Prüfverfahren und Anforderungen an das Betriebsverhalten für atemalkoholgesteuerte Alkohol-Interlocks fest, die ein Mundstück besitzen. Sie behandelt Alkohol-Interlocks, die für den allgemeinpräventiven Einsatz vorgesehen sind. Diese Europäische Norm richtet sich hauptsächlich an Prüflaboratorien und Hersteller von Alkohol-Interlocks. Sie legt Anforderungen und Prüfverfahren für die Typzulassung fest. Einzelne Parameter (wie zum Beispiel Alkoholkonzentration oder Atemvolumen) sind in dieser Europäischen Norm nur für den Zweck der Baumusterprüfung nach dieser Norm festgelegt. Möglicherweise ist es jedoch notwendig, auf Grund von nationalen Vorschriften oder abhängig von Benutzerwünschen die Werte dieser Parameter für den Einsatz der Alkohol-Interlocks abweichend festzulegen. Diese Europäische Norm gilt auch für Alkohol-Interlocks, die in andere Systeme des Fahrzeugs integriert sind. Diese Europäische Norm gilt nicht für – Alkohol-Interlocks, die hauptsächlich für den Einsatz in Verkehrssicherheits-Programmen für Trunkenheitsfahrer vorgesehen sind (siehe EN 50436-1), – Geräte, die die Alkoholkonzentration in der Innenraumluft des Fahrzeugs messen, – Alkohol-Interlocks, die kein Mundstück besitzen.

Alcootests électroniques anti-démarrage - Méthodes d'essai et exigences de performance -- Partie 2: Instruments munis d'une embouchure et effectuant la mesure du taux d'alcoolémie de l'air expiré, à usage préventif général

Alkoholne zapore - Preskusne metode in zahtevane lastnosti - 2. del: Instrumenti z ustnikom, ki merijo alkohol v sapi, za splošno preventivno uporabo

General Information

Status
Published
Publication Date
09-Apr-2008
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
10-Jan-2008
Due Date
16-Mar-2008
Completion Date
10-Apr-2008

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SLOVENSKI STANDARD
SIST EN 50436-2:2008
01-junij-2008

Alkoholne zapore - Preskusne metode in zahtevane lastnosti - 2. del: Instrumenti z

ustnikom, ki merijo alkohol v sapi, za splošno preventivno uporabo

Alcohol interlocks - Test methods and performance requirements -- Part 2: Instruments

having a mouthpiece and measuring breath alcohol for general preventive use

Alkohol-Interlocks - Prüfverfahren und Anforderungen an das Betriebsverhalten -- Teil 2:

Geräte mit Mundstück zur Messung des Atemalkohols für den allgemein-präventiven
Einsatz
Alcootests électroniques anti-démarrage - Méthodes d'essai et exigences de

performance -- Partie 2: Instruments munis d'une embouchure et effectuant la mesure du

taux d'alcoolémie de l'air expiré, à usage préventif général
Ta slovenski standard je istoveten z: EN 50436-2:2007
ICS:
13.200 3UHSUHþHYDQMHQHVUHþLQ Accident and disaster control
NDWDVWURI
43.040.80 Varnostne naprave in sistemi Safety installations and
za zadrževanje restraint systems
SIST EN 50436-2:2008 en,de

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

---------------------- Page: 1 ----------------------
SIST EN 50436-2:2008
---------------------- Page: 2 ----------------------
SIST EN 50436-2:2008
EUROPEAN STANDARD
EN 50436-2
NORME EUROPÉENNE
December 2007
EUROPÄISCHE NORM
ICS 13.320; 43.040.10
English version
Alcohol interlocks -
Test methods and performance requirements -
Part 2: Instruments having a mouthpiece and measuring breath alcohol
for general preventive use
Alcootests électroniques anti-démarrage - Alkohol-Interlocks -
Méthodes d'essai Prüfverfahren und Anforderungen
et exigences de performance - an das Betriebsverhalten -
Partie 2: Instruments munis Teil 2: Geräte mit Mundstück
d'une embouchure et effectuant la mesure zur Messung des Atemalkohols
du taux d'alcoolémie de l'air expiré, für den allgemein-präventiven Einsatz
à usage préventif général

This European Standard was approved by CENELEC on 2007-12-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the

Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,

Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50436-2:2007 E
---------------------- Page: 3 ----------------------
SIST EN 50436-2:2008
EN 50436-2:2007 – 2 –
Foreword

This European Standard was prepared by the CENELEC BTTF 116-2, Alcohol interlocks.

The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50436-2 on

2007-12-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-12-01

The purpose of this European Standard is to specify essential performance requirements and to provide

the respective test methods for presently available technologies. The technology of alcohol interlocks is

rapidly evolving, and further innovations can be expected. These could be considered in future

amendments or new parts of this European Standard.
__________
---------------------- Page: 4 ----------------------
SIST EN 50436-2:2008
– 3– EN 50436-2:2007
Contents
Page

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

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

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

3 Definitions..........................................................................................................6

4 General requirements .........................................................................................8

4.1 Blocking and unblocking........................................................................................8

4.2 Override function..................................................................................................8

4.3 Influence on the vehicle motor ...............................................................................8

4.4 Vehicle circuitry (applicable to alcohol interlocks for aftermarket installation only)....................8

4.5 Concentration limit................................................................................................8

4.6 Mouthpiece..........................................................................................................8

4.7 Data memory .......................................................................................................8

4.8 Readiness ...........................................................................................................9

4.9 Tampering ...........................................................................................................9

4.10 Electromagnetic compatibility ................................................................................9

4.11 Electrical disturbances (not applicable to parts of the alcohol interlock integrated

into other vehicle systems) ....................................................................................9

4.12 Type of protection.................................................................................................9

4.13 Combination with other systems.............................................................................9

4.14 Communication integrity...................................................................................... 10

4.15 Wireless communication...................................................................................... 10

5 Labelling and marking ...................................................................................... 10

6 Instructions ...................................................................................................... 10

6.1 Instructions for installation (applicable to alcohol interlocks for aftermarket

installation only) ................................................................................................. 10

6.2 Instructions for use ............................................................................................. 11

6.3 Instructions for service........................................................................................ 11

7 General test methods........................................................................................ 12

7.1 Samples ............................................................................................................ 12

7.2 Sequence of tests............................................................................................... 12

7.3 Preparation of alcohol interlock before testing ....................................................... 12

7.4 Normal conditions for tests .................................................................................. 12

7.5 Functional test ................................................................................................... 13

8 Test procedures and requirements.................................................................... 13

8.1 Electrical tests ................................................................................................... 13

8.2 Calibration curve ................................................................................................ 14

8.3 Durability tests ................................................................................................... 15

8.4 Environmental tests ............................................................................................ 16

8.5 Breath volume.................................................................................................... 18

8.6 Flow.................................................................................................................. 18

8.7 Exhalation time .................................................................................................. 18

8.8 Response time ................................................................................................... 18

8.9 Analytical specificity ........................................................................................... 19

8.10 Manipulation and circumvention ........................................................................... 19

8.11 Start period........................................................................................................ 21

8.12 Restart period .................................................................................................... 22

8.13 Retest ............................................................................................................... 22

8.14 Calibration and calibration interval ....................................................................... 22

8.15 Long term behaviour........................................................................................... 22

9 Test report........................................................................................................ 23

Bibliography................................................................................................................................. 24

---------------------- Page: 5 ----------------------
SIST EN 50436-2:2008
EN 50436-2:2007 – 4 –
Introduction

The main purpose of alcohol interlocks is to prevent persons with blood alcohol concentrations exceeding

a set limit value from driving a vehicle. The general preventive use, being the object of this standard, is

complementary to the use according to the standard EN 50436-1 directed towards programs for drink-

driving offenders to enhance traffic safety. The general preventive use concerns a much larger number of

drivers and vehicles. The primary target is to hinder a casually intoxicated person with temporarily

impaired judgement from driving a vehicle. It applies both to professional and private drivers, and it

applies to all vehicles in which careless driving could be hazardous.

Alcohol interlocks should not represent a significant impediment to the normal use of a vehicle.

The purpose of this European Standard is to specify essential performance requirements and to provide

the respective test methods for presently available technologies. The technology of alcohol interlocks is

rapidly evolving, and further innovations can be expected. These could be considered in future

amendments or new parts of this European Standard.

Furthermore, it should be recognised that the purpose of alcohol interlocks may to some degree violate

the privacy. There is thus good reason to apply a principle of caution when defining requirements and test

methods for alcohol interlocks.
---------------------- Page: 6 ----------------------
SIST EN 50436-2:2008
– 5– EN 50436-2:2007
1 Scope

This European Standard specifies test methods and performance requirements for breath alcohol

controlled alcohol interlocks having a mouthpiece. It covers alcohol interlocks intended for general

preventive use.

This European Standard is mainly directed to test laboratories and manufacturers for alcohol interlocks. It

defines requirements and test procedures for type approval.

Several parameters (as for example alcohol concentration or breath volume) are specified in this

European Standard for the purpose of type testing according to this standard only. However, it may be

necessary according to national regulations or depending on user requests to set the values of the

prescribed parameters differently for use of the alcohol interlocks.

This European Standard also applies to alcohol interlocks integrated into other systems of the vehicle.

This European Standard does not apply to

– alcohol interlocks intended to be used mainly in traffic safety programs for drink driving

offenders (see EN 50436-1),

– instruments measuring the alcohol concentration in the ambient air in the vehicle,

– alcohol interlocks not having a mouthpiece.
2 Normative references

The following referenced documents are indispensable for the application 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 60068-2-78:2001, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady state

(IEC 60068-2-78:2001)
EN 60529:1991 + A1:2000, Degrees of protection provided by enclosures (IP Code)
(IEC 60529:1989 + A1:1999)

ISO 7637-2:2004, Road vehicles – Electrical disturbances from conduction and coupling – Part 2: Electrical

transient conduction along supply lines only

ISO 7637-3:1995, Road vehicles – Electrical disturbances by conduction and coupling – Part 3: Vehicles

with nominal 12 V or 24 V supply voltage - Electrical transient transmission by capacitive and inductive

coupling via lines other than supply lines

ISO 16750-2:2006, Road vehicles – Environmental conditions and testing for electrical and electronic

equipment – Part 2: Electrical loads

ISO 16750-3:2006, Road vehicles – Environmental conditions and testing for electrical and electronic

equipment – Part 3: Mechanical loads

ISO 16750-4:2006, Road vehicles – Environmental conditions and testing for electrical and electronic

equipment – Part 4: Climatic loads

Commission Directive 2004/104/EC of 14 October 2004 adapting to technical progress Council Directive

72/245/EEC relating to the radio interference (electromagnetic compatibility) of vehicles and amending

Directive 70/156/EEC on the approximation of the laws of the Member States relating to the type-approval

of motor vehicles and their trailers, Official Journal of the European Communities No. L 337 of

13.11.2004, p.13

International Recommendation OIML R 126:1998, Evidential breath analyzers. International Bureau of

Legal Metrology, 11, rue Turgot – 75 009 Paris – France
---------------------- Page: 7 ----------------------
SIST EN 50436-2:2008
EN 50436-2:2007 – 6 –
3 Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
alcohol interlock

device which provides in the blocking state an output signal which is intended for example to prevent the

starting of a vehicle motor, and which can be brought into the unblocking state only after presenting and

analysing a breath sample with an alcohol concentration below a limit value

NOTE 1 It normally consists of a handset and a control unit electrically connected to the vehicle.

NOTE 2 In this European Standard the expression “starting of the vehicle motor” includes alternatively the provision of an

respective output signal.
[EN 50436-1, 3.1, modified]
3.2
breath alcohol concentration

mass concentration of ethanol, given in mg/l (milligram ethanol per litre breath air), in a breath sample

delivered into an alcohol interlock
[EN 50436-1, 3.2, modified]
3.3
breath sample
breath air sample taken under forced expiration through the mouth
[EN 50436-1, 3.3, modified]
3.4
accepted breath sample
breath sample fulfilling set requirements for volume, flow and exhalation time
3.5
mouthpiece

part connecting the mouth of the tested person and the alcohol interlock to assure hygienic conditions

and to avoid that the breath sample is mixed with ambient air
3.6
blocking state

state in which the alcohol interlock is inhibiting the start of the vehicle motor

[EN 50436-1, 3.4, modified]
3.7
unblocking state
state in which the vehicle motor can be started
[EN 50436-1, 3.5, modified]
3.8
breath alcohol concentration limit

predefined value of the breath alcohol concentration below which the vehicle motor may be started.

A breath test result equal to or above this limit value will prevent the vehicle motor from being started

[EN 50436-1, 3.6, modified]
3.9
retest
breath test after the vehicle motor has been started
[EN 50436-1, 3.7]
---------------------- Page: 8 ----------------------
SIST EN 50436-2:2008
– 7– EN 50436-2:2007
3.10
start period

time interval after an accepted breath sample has been delivered during which the vehicle motor may be

started
[EN 50436-1, 3.8, modified]
3.11
restart period

time interval after the ignition is switched off during which the vehicle motor may be started again without

the presentation of another breath sample

NOTE This restart period is intended to ensure the driver’s ability to restart the vehicle motor after a stall situation.

[EN 50436-1, 3.9, modified]
3.12
bypass

starting the vehicle motor without providing a breath sample with an accepted breath test result below the

concentration limit or without engaging the override function
[EN 50436-1, 3.10, modified]
3.13
override

method of unblocking the start of the vehicle motor without providing a breath sample with an accepted

breath test result below the concentration limit
[EN 50436-1, 3.11, modified]
3.14
tampering

unauthorised change to or interference with the alcohol interlock or its installation in the vehicle or its

functioning
[EN 50436-1, 3.12]
3.15
data memory

record of breath test results and other events with date and time stored in the internal memory of the

alcohol interlock
3.16
manufacturer

person or organisation responsible for the design, construction and/or production of the alcohol interlock

3.17
aftermarket installation

any installation of an alcohol interlock in a vehicle after the original retail sale of a vehicle

3.18
OEM aftermarket installation

aftermarket installation of an alcohol interlock which is placed onto the market under the name of the

vehicle manufacturer (OEM: original equipment manufacturer)
---------------------- Page: 9 ----------------------
SIST EN 50436-2:2008
EN 50436-2:2007 – 8 –
4 General requirements
4.1 Blocking and unblocking

Unblocking shall be achieved after delivery of an accepted breath sample and its analysis with a breath

alcohol concentration below a limit value.

The alcohol interlock shall be blocking without supplementary action from the driver after switching off the

ignition of the vehicle motor and the following expiration of a restart period.
The restart period has to be at least 1 min.
4.2 Override function
An override function is permissible.
It shall be possible to enable or to disable the override function.

In case the alcohol interlock has an override function, the override function shall be activated. The use of

the override function by the user shall be indicated.
4.3 Influence on the vehicle motor

The alcohol interlock shall not influence a running vehicle motor, even in the case of a missed or a failed

retest.

4.4 Vehicle circuitry (applicable to alcohol interlocks for aftermarket installation only)

The electrical properties of the on-board circuitry of the vehicle (lead cross-sections, contact safety, etc.)

shall not be adversely affected by the alcohol interlock installed according to the manufacturer’s

instructions.
4.5 Concentration limit

The nominal breath-alcohol-concentration limit of the alcohol interlock shall be at least 0,09 mg/l.

4.6 Mouthpiece
The alcohol interlock shall have an exchangeable mouthpiece.
4.7 Data memory
A data memory in the alcohol interlock is optional.
Examples for events to be recorded are
– test results with a concentration value above the limit value,
– missing delivery of a breath sample during a retest,
– manipulation or circumvention attempts,
– overriding and bypassing,
– detachment and reattachment of handset,
– connections and disconnections of supply voltage.

If the alcohol interlock records one or several of these events, the correct recording with date and time

shall be tested.

Data shall be stored in such a way, that it will not be lost due to unintended data corruption or low vehicle

battery voltage.
NOTE There may be national regulations on data storage and evaluation.
---------------------- Page: 10 ----------------------
SIST EN 50436-2:2008
– 9– EN 50436-2:2007
4.8 Readiness

The alcohol interlock shall provide a visual and/or audible indication when it is ready for a breath test.

A breath test shall only be accepted after a ready indication.
4.9 Tampering

The alcohol interlock shall be designed and built such that, when installed aftermarket in a vehicle,

according to the manufacturer‘s instructions, it cannot be put out of service or be rendered ineffective or

destroyed, without visible changes to the connection or the part of the alcohol interlock electrically

connected to the vehicle or its installation.

The access to the data memory, to means for setting parameters and to adjustment possibilities shall be

designed so as to deter unauthorised or inadvertent interference.
4.10 Electromagnetic compatibility

The alcohol interlock shall fulfil the relevant legal technical requirements with regard to electromagnetic

compatibility (EMC).

NOTE For the European Union the legal requirements are given in the European Directive 2004/104/EC.

4.11 Electrical disturbances (not applicable to parts of the alcohol interlock integrated into other

vehicle systems)
4.11.1 Supply lines

The alcohol interlock shall be tested for the influence of electrical disturbances according to ISO 7637-2

with the following test conditions:

– test pulses 2a, 2b, 3a, 3b (functional status: class A) and test pulse 4 (functional status:

class C),
– test level: IV.
4.11.2 Lines other than supply lines

The alcohol interlock shall be tested for the influence of electrical disturbances according to ISO 7637-3

with the following test conditions:
– functional status: class A;
– test pulses: a, b;
– test level: IV.
4.12 Type of protection

The following types of protection in accordance with EN 60529 shall be provided (see 8.3.5):

– IP40 for parts to be fitted in the passenger compartment, in the luggage compartment or in a

compartment with a type of protection as stated below;

– IP42 for parts to be fitted in the passenger compartment of roadsters/convertibles and cars

with moveable roof-panels if the installation location requires a higher degree of protection

than IP40;
– IP54 for all other parts.
4.13 Combination with other systems

The alcohol interlock may be a stand-alone instrument, may be combined with other vehicle systems or

may be integrated into them (e.g. engine management or alarm systems).
---------------------- Page: 11 ----------------------
SIST EN 50436-2:2008
EN 50436-2:2007 – 10 –
4.14 Communication integrity

If the handset of the alcohol interlock is detachable or if the handset and the control unit communicate

through wireless communication, the communication between the handset and the control unit shall be

encoded in a secure method so that it is difficult to compromise the communication integrity and to bring

the alcohol interlock into an unblocked state.
4.15 Wireless communication

If the handset and the control unit of the alcohol interlock are transmitting signals by wireless commu-

nication, the signal to the control unit shall be transmitted within 30 s after the analysis of the breath

sample.

The maximal distance for the wireless communication between the handset and the control unit under

free field conditions shall be 50 m.
5 Labelling and marking

The alcohol interlock shall be marked legibly and indelibly with the following minimum requirements:

– name or trademark of the manufacturer or of the authorised representative;
– designation of series or type;
– type approval, if required by national regulations;
– serial number;
– temperature range, affixed to be visible for the user.
6 Instructions

6.1 Instructions for installation (applicable to alcohol interlocks for aftermarket installation only)

The manufacturer shall provide on request instructions for installation containing at least the following

information:

a) list of vehicles and vehicle models for which the device is intended. This list may be specific

or generic, e.g. “all cars with petrol engines and 12 V batteries with grounded negative pole„;

b) method of installation illustrated by photographs and/or very clear drawings;

c) detailed installation instructions being such that when correctly followed by a competent

installer, the safety and reliability of the vehicle is not affected;

d) any restrictions on the positioning of any part of the installation with respect to potential

influences by dust, water and temperature;
e) special attention shall be drawn to safety related matters, for example:
– airbags;
– passenger safety;
– positioning of the handset within easy reach of the driver;
– secure mounting of the handset;

f) identification of the electrical power requirements of the alcohol interlock and, where

relevant, advise for suitable electrical or battery conditions of the vehicle;

g) post installation procedures for checking the alcohol interlock and the function of the vehicle;

---------------------- Page: 12 ----------------------
SIST EN 50436-2:2008
– 11– EN 50436-2:2007

h) instruction for removal of the alcohol interlock and returning vehicle wiring to safe conditions;

i) information on proper disposal of the alcohol interlock at the end of its service life.

6.2 Instructions for use

Each alcohol interlock shall be accompanied by instructions for use containing at least the following

information:

a) statements calling the attention to the following points (applicable to alcohol interlocks for

aftermarket installation only):

– the alcohol interlock should be installed in accordance with the manufacturer's

instructions and in accordance with national regulations by a qualified installer;

– unqualified installation may invalidate the type approval of the vehicle;
b) complete instructions for proper and safe operation of the alcohol interlock;
c) recommendations to regularly check and calibrate the alcohol interlock;

d) details of proper operation and operational limitations including the following:

– the actual breath-alcohol-concentration limit of the alcohol interlock and its meaning;

– operating temperature range and warm-up time;
– temperature of the mouthpiece before delivery of the breath test;
– battery voltage;
– influence of mouth alcohol;
– influence of substances containing alcohol;
– influence of other substances than alcohol;
e) list of recommended replacement parts and accessories;
f) recommendations for hygiene procedures (e.g. exchange of mouthpieces);
g) statements of the nature and significance of signals, alarms and messages;

h) details of common sources of malfunction and any corrective procedures (i.e. trouble-

shooting procedures);

i) general warning regarding the dangers of making any alterations or additions to the alcohol

interlock;

j) information on proper disposal of the alcohol interlock at the end of its service life.

6.3 Instructions for service

The manufacturer shall provide on request an instruction for service containing at least the following

information:
a) download of data from the memory of the alcohol interlock, if applicable;
b) service procedures and general functional test;
c) calibration procedures, if applicable;
d) general inspection;
e) maintenance procedures.
---------------------- Page: 13 ----------------------
SIST EN 50436-2:2008
EN 50436-2:2007 – 12 –
7 General test methods
7.1 Samples

All the tests shall be carried out simultaneously on two alcohol interlocks. However, at the discretion of

the test laboratory additional samples may be used if this is not considered to affect the results of the

other tests.
Where necessary, fuses may be replaced after individual tests.

Integrated batteries may be replaced or recharged before individual tests unless otherwise stated.

7.2 Sequence of tests

The alcohol interlocks shall be tested according to the respective test procedures in the following

sequence and shall fulfil the respective requirements:
– electrical tests (see 8.1);
– calibration curve (see 8.2);
– durability tests (see 8.3);
– environmental tests (see 8.4).

The sequence of the tests within each of 8.1, 8.2, 8.3 and 8.4 and the sequence of the tests of 8.5 to 8.14

may be agreed between the test laboratory and the manufacturer.

The tests according to 8.5 to 8.14 may be performed with two additional alcohol interlocks in parallel.

The long term stability
...

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