DRAFT KENYA STANDARD KS 2295-2:2018 PUBLIC REVIEW DRAFT  
Maximum road speed limiters for motor vehicles ─  
 
Part 2: Specification for system and component 
requirements  
KS 2295-2:2018 © KEBS 2018  
TECHNICAL COMMITTEE REPRESENTATION  
The following organizations were repres ented in the technical committee.  
Motor Vehicle Inspection Unit Road Safety Association of  Kenya Kenya Federation of Jua Kali Association Kenya 
Automotive Security Association Ministry of Transpor t, Infrastructure, Housing and Urban Development (CM&TE) 
Kenya Accreditation Services (KENAS) S peed Governors and Road Safety Association 
Saferider Management Systems Limited Pinnacle Systems Chloride Exide Matatu Welfare 
Association KEMRA Ekas Technologies Associat ed Battery Manufacturers East Africa Ltd. 
Kenya Bureau of Standards – Secretariat  
In order to keep abreast of  
 
progress 
in shall be regularly reviewed. Suggestions for improvements to 
published standards, addressed to  the Managing Director, Kenya 
Bureau of Standards, are welcome.  
© KEBS 2018 KS 2295-2:2018  
 
Maximum road speed limiters for motor 
vehicles ─  
Head Office: P.O. 
Box 54974 
Nairobi,Tel.: (+ 
254 020) 605490, 
603433, 602350/1, 
603352  
Coast Regional 
Office Rift Valley Regional Office  
P.O. Box 99376, 
Mombasa P.O. Box 8111, Eldoret Tel.: (+254 041) 229563, 230939/40 
Tel.: (+254 053) 33151, 63377 Fax: (+254 041) 229448 Fax: 
(+254 053) 33150  
Part 2: 
Specification for system and compon
ent 
requirements  
,Fax: (+ 
254 020) 604031  
 
KS 2295-2:2018 © KEBS 2018  
Foreword  
This Kenya Standard was developed by the Technica l Committee on Extra-low Voltage equipment under the 
guidance of the Standards Projects Committee and is in accordance with the procedures of the Bureau.  
Following the increased number of accidents that occur due to speeding, the government has put in place a number 
of measures aimed at curbing speeding on the Kenyan road s. Combined with the mounting of speed traps, limiting 
the maximum speed of the vehicle is the other  technique that has been identified as  
This second edition of this Kenya standard ha s more elaborate test methods to test for 
compliance and is  
British Standard BS AU 217-2:1989, Maximum road speed limiters for motor 
vehicles  
Indian Automotive Industry Standard AIS – 018/2001 
(including amendments 1-4), Automotive vehicles — 
Speed limitation Devices — Specifications  
Zambia Standard ZS 675:2006, Road vehicles — 
Road speed limiters — Guidelines  
Acknowledgement is hereby made for assistance derived 
from these sources.  
 
a 
measure to be used 
in reducing the 
accidents. This standard has been 
developed to 
provide guidelines on the operation of 
Speed Limiting 
devices used in vehicles. This Part 
of Kenya Standard 
specifies 
requirements for the 
performance of systems and 
components 
designed to form part of a speed 
limiter intended to 
limit the maximum road speed of motor 
vehicles by control 
of engine power.  
properly linked to Part of the 
standard unlike the previous 
edition which had no linkage. In 
the preparation of this Kenya 
Standard, reference was made to the following publications:  © KEBS 2018 KS 2295-2:2018  
TABLE OF CONTENTS  
TECHNICAL COMMITTEE REPRESENTATION......................................................................................... ii Foreword 
............................................................................................................................... ....................... iv 1 
Scope.......................................................................................................................... ............................1 2 Normative 
references .................................................................................................................... .........1 3 
Definitions.........
..........................
..........................
..........................
..........................
..........................
....1 4 Tests of 
speed limitation 
device 
..........................
..........................
..........................
..........................
.....3  
4.1 General.................................................................................................................... ..................3  
4.2 Performance Tests ......................................................................................................... ...........3  
4.2.1 Visual Examination ...................................................................................................... ..............3  
4.2.2 Marking.................................................................................................................. ....................3  
4.2.3 Functional Test and Power Co nsumption ..................... ................... .............. .................. .........3  
4.2.4 Electrical power supply.................................................................................................. ............3  
4.3  
4.3.1 System endurance test......... .................. .................. .................. .............. ............ ........... ..........5  
4.3.2 Time and temperature stability test ..................................................................................... ......5  
4.3.3 Environmental protection................................................................................................. ..........5  
4.4  
4.4.1 Conditioning with Dust................................................................................................... ............6  
APPENDIX D Time and temperature stability test (norma tive)...................................................................15  
APPENDIX E Sinusoidal vibration test (normative)....... ........................................................................ .....17 APPENDIX 
F Additional tests (informative )................ .................. ............... ............... ................ ............... .19  
DRAFT KENYA STANDARD KS 2295-2:2018  
1 Scope  
This Part of Kenya Standard specifies requirements for the performance of systems and components designed to 
form part of a speed limiter intended to limit the maximum road speed of motor vehicles by control of engine power.  
2 Normative references  
The following referenced documents are indispensable fo r the application of this document. For dated references, 
only the edition cited applies.  
BS 3G 100-4, Specification for General requirements for equipm ent for use in aircraft -Part 4: Electrical equipment 
-Section 2: Electromagnetic interference at radio and audio frequencies  
DEF STAN 59-41-3 (issue 2) Electromagnetic compatib ility-DRSO2, Radiated suscept ibility. DIN 57879:1981-3, 
Radio interference suppression for motor vehicles, vehicle equipment and internal combustion engines 
-Measurements of vehicle equipment.  
IEC 60068-2-1, Environmental testing -Part 2-1: Tests -Test A: Cold Stability  
IEC 60068-2-10, Environmental testing -Part 2-10: Test s -Test J and guidance: Mould growth Stability. IEC 
60068-2-11, Environmental testing -Part 2: Tests. Test Ka: Salt mist Stability. IEC 60068-2-14, Environmental testing 
-Part 2-14: Tests -Test N: Change of temperature Stabilit y IEC 60068-2-18, Environmental testing -Part 2-18: Tests 
-Test R and guidance: Water Stability IEC 60068-2-38, Environmental testing -Test Z/AD: Composite 
temperature/humidity  
cyclic test Stability  
For 
undated references, the latest edition of the refere nced document (including any amendments) applies. 3.1 Failure to function  
Functioning outside the requirements of Part 1 of this standard but not suffering any permanent damage  
3.2  
 kerbside mass  
The mass of a vehicle when it carries: a) No person; and b)  A full supply of fuel in its tank, an adequate supply of 
other liquids incidental to its propulsion and no load other t han the loose tools and equipment with which it is normally 
equipped  
3.3 Normal function  
Functioning in accordance with the requirements of KS 2295-1.  
3.4 Nominal voltage  
A voltage of 12± 1 V d.c or 24±2 V d.c.  
3.5 Maximum Speed (Vmax)  
 
3.6 Permanent damage  
Damage sustained by a component or system which 
renders it inoperative. For the purpose of this definition the rupture of a fuse or the operation of 
other user serviceable circuit protection devices is 
not taken to be permanent damage  
3.7 stabilized vehicle speed (Vstab)  
average speed calculated over a minimum period of 
20 s beginning 10 s after the set speed is achieved  
3.8 Speed limitation function (SLF)  
function to control the fuel feed of the vehicle or engine management in order to limit the vehicle speed to a fixed 
maximum value  
 
(refer Fig.1), if not, the cases as gi ven in the Fig.2, Vset = Vmax.  
(r
efer Fig.1) and meeting the 
requirements for acceptance criteria 
for acceleration test specified in this standard.  
 4 Tests of speed limitation device  
4.1 General  
Five samples of the limiter shall be provided -four sa mples for the performance and endurance test described in 4.2 
and 4.3 below and one sample as fitted on the vehicle for carrying out the tests prescribed in 4.5 below. In the case of 
add-on or on-board system built in the vehicle, the involved system and its components shall be provided separately 
for the performance and endurance tests.  
4.2 Performance Tests  
All the four samples shall be tested for performance as given below.  
4.2.1 Visual Examination  
 
4.2.2 Marking  
Each limiter shall be marked with the following:  
The number of this Kenya Standard, The name and/or trade mark of the manufacturer;  
prescribed in KS 2295-1, pertaining to the components alone.  function when the power supply is returned to normal.  
4.2.4.2 Ripple. Normal operation of the limiter shall not be affected  by regular or irregular variations in voltage 
about the prevailing supply level (excluding transients) not ex ceeding 3V (± 2 Vdc) peak to peak in the range 10 Hz 
to 10 kHz.  
4.2.4.3 Reverse polarity. The limiter may fail to function but it s hall not be permanently damaged when subjected 
to a reversal of polarity of the supply referred to in 4.2.3 for 1 min and shall return to normal function when the 
power supply is 
returned to normal.  
4.2.4.4 Transients.  
4.2.4.5 Input/output 
protection  
4.2.4.5.1 Each output in 
turn shall withstand 
connection to earth for 1 min duration, without 
permanent damage, 
with the system operating and shall 
return to normal 
function when the connection is removed.  
4.2.4.5.2 Each input in 
turn shall withstand a connection to earth and to  supply for 1 min, without permanent damage, 
with the system operating and shall return to normal function when the connection is removed.  
4.2.4.6 Electromagnetic compatibility  
4.2.4.6.1 Supply line interference. When tested in accordance with British Standard 3G 100: 
Part 4:  
4.2.4.6.2 Electromagnetic emissions. Using the test procedure described in  paragraph 4 of DIN 57879: Part 3:1981 
and with the values of electromagnetic emissions measured on the output port of a 50 Ohm line impedance 
stabilizing network using a CISPR quasi-peak measuring rece iver (both of which shall meet the requirements of KS 
1586-1), the limiter under test shall not  cause interference in the supply line exceeding the values shown in Table 1, 
or their equivalent if other equipment is used.  
4.2.4.7 RF field susceptibility. When tested in accordance with the procedur e described in DEF STAN 59-41, Part 3, 
Issue 2:1986 (DRSO2 radiated susc eptibility) the limiter shall function normally  when subjected to an RF field of 140 
dB above 1 µV/m (10 V/m) over a frequency range of 1 MHz to 220 MHz.  
12 V systems and ISO 7637-2 for 24 V systems. 
Transient voltage test severity levels are given in APPENDIX A.  
S
ection 2:1980 (civil 
applications), the limiter shall operate 
correctly with 3 V 
r.m.s. interference, at any frequency in 
the range 1 MHz to 
150 MHz, superimposed on 
either battery supply 
line with respect to a reference ground 
plane.  
 4.3 Endurance Tests  
The device shall function normally during the tests and s hall meet the performance requirements as given in 4.2.3 
after completion of the tests while complyi ng with the manufacturer’s specifications.  
However, if any breaking down of the device occurs  during one of the endurance tests, a second device  may be submitted to the considered endurance tests at t he manufacturer's request. The Limiter shall be mounted on 
a test bench simulating the attitude and movement to simulate the vehicle conditions.  
Note 1 – For cases where the speed limiting function is an in built feature in the Engine C ontrol Unit (ECU), the ECU 
shall be submitted to the endurance test prescribed below. However, this may be omitted if the applicant 
demonstrates resistance to those effects.  
Note 2 -“demonstration” means – Declaration by  manufacturer in a format as given in APPENDIX B or  
Using the component tested under 4.3.3.2 , carry out a high temperature storage test in accordance with IEC 
60068-2-2 at temperature of:  
a) + 80 °C for cab mounted components; b) + 140 °C for 
engine mounted components; c) + 100 °C for chassis 
mounted components.  
 The period for this test shall be 96 h after the component has reached the required temperature. Return the 
component to 18 ± 2 °C at a rate not exceeding 1 °C/min and test.  
4.3.3.4 Endurance Test under humidity storage  
Using the component tested under 4.3.3.3 Error! Reference source not found.  carryout a humidity storage test in 
accordance with IEC 60068-2-38 and test after the drying period.  
dropped, or toppled, or otherwise roughly handled. A method 
of test is under consideration.  
4.4.5 Bump Test  
This test is intended to determine the suitability of t he limiter to withstand repeated shocks such as those 
encountered on motor vehicles.  
A method of test is under consideration.  
4.5 Performance Tests on the Device as Fitted on the Vehicle  
 4.5.1 General  
4.5.2.3.1 Preparation of the Vehicle  
a)  The limiter to be approved shall be fitted on the vehi cle. The settings of the engine of the test vehicle, 
particularly the fuel feed (carburetor or injection syst em) shall conform to the sp ecification of the vehicle 
manufacturer  
b)  The vehicle shall be at its kerbside mass, plus the mass of the driver and any observer and test equipment  c)  The tyres shall be nominally new, i.e. equal to or  greater than 1 mm thread depth, and inflated to the 
pressure recommended by the vehicle manufacturer for operation at the vehicle’s maximum gross weight  
d)  The power train components shall be within their normal operating temperature ranges  
4.5.2.3.2 Ambient weather conditions  
The mean wind speed measured at a height at least 1m  above ground shall be less than 6m/s with gusts not 
exceeding 10m/s. The test surface shall be free from standing water  
4.5.2.3.3 Surface condition  
 
4.5.2.3.4 Instrumentation  
recorded.  
NOTE 1 It is recommended that the accuracy of recorded m easured speeds should be ± 0.2 % against a time base accurate to 
within 0.3 %.  
NOTE 2 To obtain an accurate measure of vehicle speed, a number  of steady speed runs in the range Vmin to Vmax may be 
needed (using the limiter to provide these steady speeds if convenient). The runs should be performed over a known distance and  
the time taken to cover this distance recorded. Fr om the data collected calc ulations can then be  
uneven patches. 
Gradients shall not exceed 2 % and shall not vary by more than 1 %, excluding camber effects  Transient Response (Fig.1) After the set speed is reached first time,  
The maximum speed shall not exceed the set speed Vset by more than 5%.  
The rate of change of speed shall not exceed 0.5 m/s2 when measured on a period greater than  
0.1 s.  
The stabilized speed cond itions specified in 3.7 shall be attained within 10 s of first reaching of the set 
speed Vset.  
Stabilized Speed (Fig.1) Vstab is the average speed calculated for a minimum time interval of 20s beginning 10s after 
first reaching Vset.  
When stable speed control has been achieved,  
-Speed shall not vary by more than 4% of the se t speed Vset or 2 km/h whichever is higher  
0.1 s.  
Acceleration tests shall be carried out and the acceptable criteria verified for each 
reduction ratio of gear allowing the speed to be exceeded.  
4.5.2.4 Test Method at Steady Speed  
4.5.2.5  
The whole test including the 
calculation of the stabilization 
speed shall be carried out 
five times. The speed 
measurement shall be 
carried out with an accuracy 
of ± 1%, the time 
measurement with an 
accuracy of 0.1 s.  
4.5.2.6 Acceptance Criteria for 
Steady Speed Test  
-None of the stabilization speeds Vst ab obtained shall exceed set speed Vset. 
However, a tolerance of 5% of the Vset value or 5 km/h whichever is greater is 
acceptable.  
4.5.3.1 Characteristics of Chassis Dynamometer  
The equivalent inertia of the vehicle mass shall be reprodu ced on the chassis dynamometer with an The speed of the 
-T
he rate of change of 
speed shall not 
exceed 0.2 m/s2 
when measured on 
a period greater 
than  
The 
vehicle shall be driven at full acceleration till a steady speed is achieved, then shall be maintained at this speed 
for at least 400 m. The test shall then be repeated in the opposite direction. The  
-The 
difference between the stabilization speeds  obtained during each test run shall 
be equal to or less than 3 km/h. -Tests in steady speed shall be carried out and the acceptance criteria verified for each reduction  vehicle shall be measured with an accuracy of ±1%. The time shall  
The power absorbed by the brake of  the chassis dynamometer during t he test shall be set to correspond 
with the vehicle’s resistance to progressive movement at the tested speed(s). This power may be established by 
calculation and shall be set to an accuracy of ±10%. At the request of the manufacturer, the power absorbed may 
alternatively be set at 0.4 Pmax. (Pmax is the maximum power of the engine). The vehicle running at a speed which 
is 10 km/h below its set speed shall be accelerated to the maximum possible engine speeds by a fully positive action 
on the acceleration control. The action shall be maintai ned for at least 20 s, after the vehicle speed has been 
stabilized. The instantaneous vehicle speed shall be recorded during the test in order to establish the curve of the 
speed versus the time and during the oper ation of the speed limitation device.  4.5.3.2.2 Acceptance Criteria for the Acceleration Test  
The test shall be satisfactory if c onditions of para 4.5.2.3.6 are met.  
4.5.3.3 Test Method for Steady Speed Test  
4.5.3.3.1 The vehicle shall be installed on the chassis dynamomet er. The following acceptance criteria should be met 
for power absorbed by the chassis dynam ometer varying progressively from the maximum power Pmax to a value 
equal to 0.2 Pmax. The speed of the vehicl e shall be recorded in the full range of  
4.5.3.3.2 Acceptance criteria for steady speed tests are judged satisfactory if the conditions 
of 4.5.2.3.6 are fulfilled.  
5 Type Approval (TA) and Conformity Of Production (COP)  
The manufacturer/applicant shall take all appropriate steps to ensure that the components continue to comply with 
the requirements of ISO 26262 & IEC 61508.  
With regards to approval of Speed Limite rs Type Approval Certificate/Conformi ty of Production/test reports/extension 
reports shall be issued by same a gency who has issued Type Approval.  
Figure 1 – Allowed tolerances of limiter response characteristics  
po
wer defined 
above. The 
maximum speed 
of the vehicle shall be 
determined on 
this range. Test and record 
defined above 
shall be made 
five times.  
APPENDIX A Transient voltage test severity levels (normative)  
Normal function A Fail but recover C  
Table 2 — Transient voltage test severity levels  
 
Test pulse Test level Functional status Number of pulses or test time  Remarks  
1 -150 (-75) C 5000   
2 +150 ( +75) C 5000   
3(a) -150 (-75) A 1h   
3(b) +150 ( +75) A 1h   
4 -12(-6) C 5 pulses  1 min between each 
5 +180(+80) C 1 pulse   
NOTE These values are for use in conjunction with ISO 7637-1 or ISO 7637-2   APPENDIX B Declaration of compliance to the test  according Speed limiting function of Engine 
Management System  
Speed limitation of the vehicle is a so ftware part of Engine Management Syst em (EMS). EMS has undergone test 
according to or beyond the endurance test require ments specified for the speed limiting function.  
This declaration is based on tests c onducted for our internal approvals.  
Model name: Identification:  
Conditioning 1:  
Test at ambient temperature. T = 30°C ± 5°C, 50000 cycles Test 
conducted (actual parameters if diffe rent than above) Test results: Test 
performed. No failures. [t1]  
Conditioning 2:  
Test at high temperature: T =65°C ± 5°C: for electronic  components, 100°C±5°C: for mechanical components; 12500 
cycles. Test conducted (actual parameters if different than above) Test results:  Test performed. No failures. [t2]  
Conditioning 3:  
Test at low temperature; T = -20°C ± 5°C, 12500 cycles. Test 
conducted (actual parameters if di fferent than above) Test results: 
Test performed. No failures. [t3]  
Conditioning 4:  
Test in salted atmosphere. 5 % sodium chloride, T =35°C ± 2°C, 12500 cycles. Test conducted (actual parameters if 
different than above) Test results: Test performed. No failures. [t4]  
Conditioning 5:  
Vibration test.  Test 1: 10 -24 Hz, amplitude ± 2mm. Test 2: 
24-1000 Hz for 2.5/5 g.  
APPENDIX C System endurance test (normative)  
C.1 Connect the limiter in accordance with the manufacture r’s instructions and where necessary adjust to simulate 
maximum load/travel conditions (worst case). Connect a 24 V (12 V) battery with the charge maintained at 28 (14) ± 1 
V d.c.  
C.2 Activate the system through the follo wing test cycle (see Fig. 3):  
a) Drive to a full range travel ( t1); b) Reverse to zero output ( t2); c) Drive to a mean position ( t3); d) Control at 
mean output for 5 × ( t1+ t2+ t3); e) Reverse to zero output; where t  
C.3 Repeat this test cycle for the 250,000 
cycles.  
 
 
APPENDIX D Time and temperatur e stability test (normative)  
D.1 Connect up the system in a test chamber at 18 ± 2 °C (see Figure B.1) to a supply of 28 (14) ± 1 V d.c., 
complete with simulation of components of the loop between the throttle actuator and speed (i.e. engine and 
transmission) outside of the test chamber.  
D.2 Set simulated throttle demand to maximum.  
D.3 Adjust the set speed of the system where appropriate.  
D.4  
D.5 Allow the system to operate for 10 h.  
D.6 Reduce the test chamber temperature to -20 ± 2 
°C. After the temperature of the test chamber has 
stabilized, operate the syst em for a further 30 min.  
D.7 Increase the test chamber temperature to 60 ± 2 
°C. After the temperature of the test chamber has 
stabilized, operate the syst em for a further 30 min.  
D.8 Increase the test chamber temperature to 80 ± 2 °C. 
After the temperature of the test chamber has stabilized, 
operate the system for a further 30 min. The system sha ll continue to function but the accuracy may be degraded.  
D.9  
fro
m the set speed. 
stabilized, operate the system for a further 30 min. Record the maximum deviation from 
the set speed.  
APPENDIX E Sinusoidal vibration test (normative)  
E.1 Chassis and cab mounted components  
E.1.1 General  
Subject the component to be tested, mounted on its normal mount, complete with  
E.1.2 Resonance search  
Frequency range 10 Hz to 250 Hz Input 2 gn Sweep time 2 min Duration Long enough to 
establish resonant frequency  
E.1.3 Endurance test at resonance frequency  
Frequency range 3 dB below peak for each 
resonance Input 2 gn Sweep rate . 1 Hz/s Duration 
7.2 h  
 Frequency range 10 Hz to 250 Hz Input 2 g
n Sweep 
rate 4 Hz/s Duration  
E.2 Engine mounted components  
E.2.1 General  
Subject the component mounted on its normal mount, complete with its ancillary components to a 
resonance search in all three planes using a 
sinusoidal wave form under the conditions given in E.2.2 followed by an endurance test under the conditions given in 
E.2.3.  
E.2.2  
40 Hz to 2000Hz Input 6 g
n Sweep time 2 min  
Long enough to establish resonant frequencies  
Endurance test at resonance ranges  
3 dB below peak for each resonance in the ranges 40 Hz to 200 Hz and 200 Hz to 2 000 
Hz Input 12 gn6 gn Sweep time 2 Hz/s 5 Hz/s Duration 107 reversals at resonant frequency  
If there is no resonance, carry out a broad sweep enduranc e test under the following conditions: Frequency range 40 
its 
ancillary components, to a 
resonance search 
in all three planes using a sinusoidal 
wave form under 
the conditions given in E.1.2 
followed by an 
endurance test under the 
conditions given in 
E.1.3 .  
30 
h/plane  Hz to 200 Hz 200 Hz to 2 000 Hz Input 12 gn6 gn Sweep rate 2 Hz/s 5 Hz/s Duration 10 h/plane 10 h/plane  APPENDIX F Additional tests (informative)  
F.1 General The tests given in F.2 to F.5 may be considered by system component manufacturers.  
F.2 Change of temperature (thermal shock) Mount the comp onent in its normal operating attitude and test in 
accordance with  
Na of 
IEC 60068-2-14 using the following 
minimum and 
maximum temperatures: a) 0 
°C to + 65 °C for 
cab mounted components; b) –0 
°C to + 120 °C for 
engine mounted components; c) –0 
°C to + 85 °C for 
chassis mounted components.  7) Hydraulic power brake fluid; 8) Ethyl ene glycol anti-freeze (50 % solution).  
Visually inspect the component for surface deterioration and test for normal operation.  
F.5 Driving rain: chassis mounted components  
The test chamber shall have the dimensions and 6 nozzle arrangements as shown in Figure E.1. Each nozzle 
includes a jet which shall emit a solid cone spray (a solid cone spray is defined as one where the water within the spray is evenly distributed). Each nozzle shall pass (455 mL/min to 758 mL/min) of water. Mount the component in 
the test chamber in its normal operating attitude, positioned so that the centre of the unit is approximately 6 in (152 
mm) above the centre of the test chamber floor and so t hat the spray from all the angled jets impinges upon the 
component. Leave any drain holes open and fit all appropriate electrical leads and grommets. Where applicable, 
protect mounting and mechanical connections to simulate normal service conditions. Subject the component to 
continuous water spraying (maximum water temperature 40 °C) for a period of 25 h. Allow the test unit to drain for 1 
h. At the conclusion of the preceding test, test t he component for normal operation. The component shall  
NOTE 1 The component may subsequently be subjected to a prolonged storage and/or endurance test. Any such test  
F.6 Mycological  
Test in accordance IEC 60068-2-10 as follows:  Wash the exterior of the component and the spraying equipm ent with a 2 % solution of liquid detergent, rinse in clean 
water and thoroughly dry.  
 
have passed the 
test unless small 
globules of water are 
present in the 
enclosure in such aggregate 
quantity as to be 
detrimental to the life or 
operation of the 
component. 
Materials used 
for the enclosure, 
including 
gaskets, if any shall be 
unaffected by 
water.  
req
uirements should be stated in the product 
specification. NOTE 2 A practical evaluation 
technique is to remove the component after 
completing the above procedure and whilst 
maintaining the same mounting attitude, 
transferring to a low temperature environment 
to cause water freezing, and then test for 
normal operation.  
Figure E.1 — Driving rain test: test cabine t nozzle arrangement (6 nozzles, 4 angled, 2 
horizontal)