SIST ETS 300 019-2-3:1999/A2:1999

Equipment Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment; Part 2-3: Specification of environmental tests T 3.1 to T 3.5; Stationary use at weatherprotected locations

To investigate the adoption of an alternative test method for steady state climatic tests for classes 3.1-3.5.

Inženiring opreme (EE) - Pogoji okolja in preskusi vplivov okolja za telekomunikacijsko opremo – Del 2-3: Specifikacija preskusov vplivov okolja T 3.1 do T 3.5 - Mirujoča (stacionarna) uporaba na lokacijah, zaščitenih pred vremenskimi vplivi

General Information

• Status: Published
• Publication Date: 31-Oct-1999
• ICS: 19.040 - Environmental testing
• ICS: 33.050.01 - Telecommunication terminal equipment in general
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Nov-1999
• Due Date: 01-Nov-1999
• Completion Date: 01-Nov-1999
• Ref Project: ETSI ETS 300 019-2-3/A2 ed.1 (1998-05) - Equipment Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment; Part 2-3: Specification of environmental tests T 3.1 to T 3.5; Stationary use at weatherprotected locations

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 019-2-3:1999/A2:1999
01-november-1999
,QåHQLULQJRSUHPH((3RJRMLRNROMDLQSUHVNXVLYSOLYRYRNROMD]D
WHOHNRPXQLNDFLMVNRRSUHPR±'HO6SHFLILNDFLMDSUHVNXVRYYSOLYRYRNROMD7
GR70LUXMRþDVWDFLRQDUQDXSRUDEDQDORNDFLMDK]DãþLWHQLKSUHG
YUHPHQVNLPLYSOLYL
Equipment Engineering (EE); Environmental conditions and environmental tests for
telecommunications equipment; Part 2-3: Specification of environmental tests T 3.1 to T
3.5; Stationary use at weatherprotected locations
Ta slovenski standard je istoveten z: ETS 300 019-2-3/A2 Edition 1
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
33.050.01 Telekomunikacijska Telecommunication terminal
terminalska oprema na equipment in general
splošno
SIST ETS 300 019-2-3:1999/A2:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 019-2-3:1999/A2:1999

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SIST ETS 300 019-2-3:1999/A2:1999
ETS 300 019-2-3
AMENDMENT A2
May 1998
Source: EE Reference: RE/EE-01026-2-3
ICS: 33.020
Key words: Environment
This amendment A2, modifies
the European Telecommunication Standard ETS 300 019-2-3 (1994)
Equipment Engineering (EE);
Environmental conditions and environmental tests for
telecommunications equipment;
Part 2-3: Specification of environmental tests T 3.1 to T 3.5;
Stationary use at weatherprotected location
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1998. All rights reserved.

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SIST ETS 300 019-2-3:1999/A2:1999
Page 2
ETS 300 019-2-3: May 1994/A2: May 1998
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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SIST ETS 300 019-2-3:1999/A2:1999
Page 3
ETS 300 019-2-3: May 1994/A2: May 1998
Foreword
This amendment two to ETS 300 019-2-3 (1994) has been produced by the Equipment and Engineering
(EE) Technical Committee of the European Telecommunications Standards Institute (ETSI).
Transposition dates
Date of adoption of this amendment: 1 May 1998
Date of latest announcement of this amendment (doa): 31 August 1998
Date of latest publication or endorsement of this amendment
(dop/e): 28 February 1999
Date of withdrawal of any conflicting National Standard (dow): 28 February 1999

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SIST ETS 300 019-2-3:1999/A2:1999
Page 4
ETS 300 019-2-3: May 1994/A2: May 1998
Amendments
Page 12, subclause 3.2
Replace table 3.2 with the following:
Environmental parameter Environmental Environmental test specification T 3.2: In-use,
Class 3.2 Partly temperature-controlled locations
Type Parameter Detail parameter Characteristic Test severity Duration Reference Method
severity
low (°C) -5 -5 16 h IEC 68-2-1 Ab/Ad: Cold (8) (9) (25)
___________________________________________________________________________________________________________________________
Air high (°C) +45 +45 (2) (18) or +55 16 h IEC 68-2-2 Bb/Bd: Dry heat (25)
___________________________________________________________________________________________________________________________
temperature
change temp range (°C) +25/+55 half cycle IEC 68-2-14 Nb: Change of
or +25/+45 (2) t = 3 h temperature (25)
1
or +25/+40 (18)
rate (°C/min) 0,5 0,5 (4) (7) (16)
low (%) 5 none (5)
_____________________________________________________________________________________________________________
relative high (%) 95 93 4 d IEC 68-2-56 Cb: Damp heat
(°C) +30 steady state (25)
_____________________________________________________________________________________________________________
Humidity condensation yes
(°C) +30° 1 cycle IEC 68-2-30 Db: Damp heat cyclic
(%) 90-100 (22) (19) Variant 1 (25)
___________________________________________________________________________________________________________________________
3
low (g/m ) 1 none (5) (10)
absolute _____________________________________________________________________________________________________________
3
high (g/m ) 29 (12)
low (kPa) 70 none
pressure _____________________________________________________________________________________________________________
Air high (kPa) 106 none
___________________________________________________________________________________________________________________________
speed (m/s) 5,0 none
intensity no
rain _____________________________________________________________________________________________________________
low temperature no
___________________________________________________________________________________________________________________________
Water
other sources no
___________________________________________________________________________________________________________________________
icing & frosting yes (5)
2
Radiation solar (W/m)700 (21)
___________________________________________________________________________________________________________________________
2
heat (W/m ) 600 (3)
(continued)

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SIST ETS 300 019-2-3:1999/A2:1999
Page 15, subclause 3.3
Replace table T 3.3 with the following:
Environmental parameter Environmental Environmental test specification T 3.3: In-use,
Class 3.3 Not temperature-controlled locations
Type Parameter Detail parameter Characteristic Test severity Duration Reference Method
severity
low (°C) -25 -25 16 h IEC 68-2-1 Ab/Ad: Cold (8) (9) (26)
___________________________________________________________________________________________________________________________
Air high (°C) +55 +55 (2) or +70 16 h IEC 68-2-2 Bb/Bd: Dry heat (26)
___________________________________________________________________________________________________________________________
temperature
change (°C) -5/+45 (4) 1 cycle IEC 68-2-14 Nb: Change of
(°C/min) 0,5 0,5 (7) (16) t = 3 h temperature (26)
1
low (%) 10 none (5)
_____________________________________________________________________________________________________________
high (%) 100 93 4 d IEC 68-2-56 Cb: Damp heat
relative (°C) +30 steady state (26)
_____________________________________________________________________________________________________________
Humidity condensation yes
(%) 90-100 2 cycles IEC 68-2-30 Db: Damp heat cyclic
(°C) +30 (22) Variant 1 (26)
___________________________________________________________________________________________________________________________
3
low (g/m ) 0,5 none (5) (10)
absolute _____________________________________________________________________________________________________________
3
high (g/m ) 29 (12)
low (kPa) 70 none
pressure _____________________________________________________________________________________________________________
Air high (kPa) 106 none
___________________________________________________________________________________________________________________________
speed (m/s) 5,0 none
intensity wind driven (20)
rain _____________________________________________________________________________________________________________
low temperature no
___________________________________________________________________________________________________________________________
Water
other sources dripping water (20)
___________________________________________________________________________________________________________________________
icing & frosting yes (5)
2
solar (W/m)1200 (21)
___________________________________________________________________________________________________________________________
Radiation
2
heat (W/m ) 600 (3)
(continued)
Page 5
ETS 300 019-2-3: May 1994/A2: May 1998

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SIST ETS 300 019-2-3:1999/A2:1999
Page 6
ETS 300 019-2-3: May 1994/A2: May 1998
Page 21, subclause 3.4
Replace table T 3.4 with the following:
Environmental parameter Environmental Environmental test specification T 3.4: In-use,
Class 3.4 Sites with heat trap.
Type Parameter Detail parameter Characteristic Test severity Duration Reference Method
severity
low (°C) -40 -40 16 h IEC 68-2-1 Ab/Ad: Cold (8) (9) (27)
___________________________________________________________________________________________________________________________
Air
temperature high (°C) +70 +70 (2) or +85 16 h IEC 68-2-2 Bb/Bd: Dry heat (27)
___________________________________________________________________________________________________________________________
change (°C) -5/+45 2 cycles IEC 68-2-14 Nb: Change of
(°C/min) 0,5 0,5 (4) (7) (16) t = 3 h temperature (27)
1
low (%) 10 none (5)
_____________________________________________________________________________________________________________
relative high (%) 100 93 4 d IEC 68-2-56 Cb: Damp heat
(°C) +35 (16) steady state (27)
_____________________________________________________________________________________________________________
condensation yes
(%) 90-100 2 cycles IEC 68-2-30 Db: Damp heat cyclic
Humidity (°C) +30 (16) Variant 1 (27)
___________________________________________________________________________________________________________________________
3
absolute low (g/m ) 0,1 none (5) (10)
_____________________________________________________________________________________________________________
3
high (g/m ) 35 (12)
Air pressure low (kPa) 70 none
_____________________________________________________________________________________________________________
high (kPa) 106 none
___________________________________________________________________________________________________________________________
speed (m/s) 5,0 none
rain intensity wind driven (20)
_____________________________________________________________________________________________________________
low temperature no
___________________________________________________________________________________________________________________________
Water other sources dripping and (20)
spraying water
___________________________________________________________________________________________________________________________
icing & frosting yes (5)
2
Radiation solar (W/m)1200 (21)
___________________________________________________________________________________________________________________________
2
heat (W/m ) 600 (3)
(continued)

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SIST ETS 300 019-2-3:1999/A2:1999
Page 18, subclause 3.5
Replace table T 3.5 with the following:
Environmental parameter Environmental Environmental test specification T 3.5: In-use,
Class 3.5 Sheltered locations.
Type Parameter Detail parameter Characteristic Test severity Duration Reference Method
severity
low (°C) -40 -40 16 h IEC 68-2-1 Ab/Ad: Cold (8) (9) (28)
___________________________________________________________________________________________________________________________
Air
temperature high (°C) +40 +40 16 h IEC 68-2-2 Bb/Bd: Dry heat (28)
___________________________________________________________________________________________________________________________
change (°C) -40/+40 2 cycles IEC 68-2-14 Nb: Change of
(°C/min) 1,0 1,0 (4) t = 3 h temperature (28)
1
low (%) 10 none (5)
_____________________________________________________________________________________________________________
relative high (%) 100 93 4 d IEC 68-2-56 Cb: Damp heat
(°C) +35 (16) steady state (28)
_____________________________________________________________________________________________________________
condensation yes
(%) 90-100 2 cycles IEC 68-2-30 Db: Damp heat cyclic
(°C) +35 (16) Variant 1 (28)
___________________________________________________________________________________________________________________________
Humidity
3
absolute low (g/m ) 0,1 none (5) (10)
_____________________________________________________________________________________________________________
3
high (g/m ) 35 (12)
Air pressure low (kPa) 70 none
_____________________________________________________________________________________________________________
high (kPa) 106 none
___________________________________________________________________________________________________________________________
speed (m/s) 30 none
rain intensity wind driven (20)
_____________________________________________________________________________________________________________
low temperature no
___________________________________________________________________________________________________________________________
Water other sources dripping and (20)
spraying water
___________________________________________________________________________________________________________________________
icing & frosting yes (5)
2
Radiation solar (W/m)no
___________________________________________________________________________________________________________________________
2
heat (W/m ) 600 none
(continued)
Page 7
ETS 300 019-2-3: May 1994/A2: May 1998

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SIST ETS 300 019-2-3:1999/A2:1999
Page 8
ETS 300 019-2-3: May 1994/A2: May 1998
Page 24, subclause 3.6
Add notes 25 to 28.
NOTE 25: The alternative test method given in annex C may be used.
NOTE 26: The alternative test method given in annex D may be used.
NOTE 27: The alternative test method given in annex E may be used.
NOTE 28: The alternative test method given in annex F may be used.

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SIST ETS 300 019-2-3:1999/A2:1999
Page 9
ETS 300 019-2-3: May 1994/A2: May 1998
Page 26, annex B
Replace by the following:
Annex B (normative): Alternative climatic test method for class 3.1
B.1 Description
This test method is an alternative to IEC 68 [2] temperature and most humidity tests. It can also contain
the cold start test given in this ETS 300 019-2-3. The test uses a sequence which scans the characteristic
conditions of the climatogram which is constructed from test severities specified in ETS 300 019-2-3. It
may be applied to all equipment being tested for climatic conformance with class 3.1 in ETS 300 019-1.
B.2 Objectives
To provide a standard test method for determining the functionality of an equipment when it is tested in a
variable climatic environment consisting of a simultaneous change in combined values of temperature and
humidity.
The climatogram test takes into account the boundary climatic conditions which can affect equipment
throughout Europe up to an altitude of 3000 metres. The objective of the test is the evaluation of
equipment resistibility performance and no attempt is made to assess its reliability. This is why repairs are
authorized during tests, provided that failures observed do not systematically recur in the same climatic
conditions.
B.3 Test apparatus
The test apparatus shall consist of a single test chamber that is able to reproduce the conditions
described in this annex.
The dimensions of the chamber shall be in accordance with the criteria described in IEC 68-2-56 [2].
NOTE: When climatic stabilization is specified, the time required will vary depending on the
thermal mass of the equipment under test, its heat dissipation and the relative size of
the test chamber.
For naturally ventilated equipment it is important that the air flow in the test chamber is controlled (less
than 1 m/s) near the equipment under test in order to prevent undue influence on its ventilation system.
This will allow components inside the equipment to reach their working temperature in relation to the
ambient conditions of the chamber.
The test chamber is required to control the rate of change of temperature to a maximum of 0,5°C per
minute and the rate of change of relative humidity to a maximum of 10 % per hour with the equipment in
its operational state.
B.4 Methodology
The traditional method used for climatic testing of equipment in order to demonstrate its resistibility is to
use the IEC 68-2 [2] tests (i.e. cold, dry heat, change of temperature and steady state damp heat). The
severities of the tests are chosen to simulate the effects of the extreme climatic conditions of the class.
This annex describes an alternative test method which uses a sequence test following the characteristic
conditions of the climatogram figure B.1.
B.5 Pre-conditioning
Pre-conditioning is required for a minimum period of one hour after temperature stabilization within the
equipment under the initial condition 23°C / 50 % R.H. (i.e. point S on the climatogram of figure B.1).

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SIST ETS 300 019-2-3:1999/A2:1999
Page 10
ETS 300 019-2-3: May 1994/A2: May 1998
B.6 Testing
B.6.1 Equipment operation
The equipment under test shall be in its operational state throughout the tests.
Input and load conditions of the equipment shall be chosen to obtain full utilization of the equipment under
test. The dissipation shall be maximized, except for the low temperature test, where it shall be minimized.
B.6.2 Equipment failures
If a failure occurs, the whole test cycle shall be started again, after the failure has been recorded and
rectified.
Table B.1: Test severities for class 3.1
Protected from solar and heat radiation Exposed to solar and heat radiation and
or equipment is ventilated equipment is not ventilated
Exceptional operating Normal operating conditions Exceptional operating Normal operating
conditions (8) conditions (8) conditions
Point Temp RH Point Temp RH Point Temp RH Point Temp RH
(°C) (%) (°C) (%) (°C) (%) (°C) (%)
S + 23 (3) 50 (6) S +23 (3) 50 (6) S + 23 (3) 50 (6) S +23 (3) 50 (6)
A + 45 (3) 37 (6) A + 40 (3) 47 (6) A + 55 (3) 23 (6) A + 50 (3) 30 (6)
e e
via S
via S
B + 45 (3) 5 (5) B + 40 (3) 5 (5) B + 55 (3) 5 (5) B + 50 (3) 5 (5)
e e
C + 23 (3) 5 (5) C +23 (3) 5 (5) C + 23 (3) 5 (5) C +23 (3) 5 (5)-
D + 5 (2) 15 (5) D +5 (2) 15 (5) D + 5 (2) 15 (5) D +5 (2) 15 (5)
E - 5 (2), (7) Any (1) E + 5 (2), (7) Any (1) E - 5 (2), (7) Any (1) E + 5 (2), (7) Any (1)
e e
F + 5 (2) 90 (6) F + 5 (2) 85 (6) F + 5 (2) 90 (6) F + 5 (2) 85 (6)
e e
G + 28 (3) 90 (4) G + 29 (3) 85 (4) G + 28 (3) 90 (4) G + 29 (3) 85 (4)
e e
A + 40 (3) 47 (6) A +40 (3) 47 (6) A + 50 (3) 30 (6) A +50 (3) 30 (6)
S + 23 (3) 50 (6) S +23 (3) 50 (6) S + 23 (3) 50 (6) S +23 (3) 50 (6)
NOTE 1: It is acceptable to perform tests without controlling the humidity when testing below 5°C (as
detailed in IEC 68-2-1 test Ad).
NOTE 2: ± 3°C according to IEC 68-2-1.
NOTE3: ± 2°C according to IEC 68-2-2 and IEC 68-2-56.
± 3°C is acceptable for certain chamber sizes, as indicated in IEC 68-2-2.
NOTE 4: ± 3% RH according to IEC 68-2-56.
NOTE 5: Low relative humidity to be ± 5%
NOTE 6: ± 3% RH.
NOTE 7: If the cold start test is required in the product specification, when arriving at the point E the
equipment shall be switched off; after temperature stabilization is reached within the equipment,
it shall be switched on and the test continued.
NOTE 8: Exceptional operating conditions relate to reduced performance requirements.

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SIST ETS 300 019-2-3:1999/A2:1999
Page 11
ETS 300 019-2-3: May 1994/A2: May 1998
B.6.4 Scanning the climatogram
The sequence of scanning the climatogram is shown in figure B.1. Scanning begins at point S and ends at

point S.
The various points of the climatogram correspond with test severities specified in table B.1.
Be A e
A: 0,5 °C / min
S
>
A
B
G
Ge
C n
S
E
Fe
D F
Ee
0 Relative Hum idity (% ) 100
Figure B.1: Climatogram showing scanning sequence
B.6.5 Rates of change
The rates of change for temperature and humidity are:
a) 5° C/h during constant relative or absolute humidity;
b) 10% RH/h during constant temperature;
c) 0,5°C/min between point S to point A and A . This step is used to verify the performance of the
e

equipment under maximum rate of change of temperature.
NOTE: The cooling gradient may be reduced to 0,2°C/min where test chamber
restrictions preclude a gradient of 0,5°C/min.
B.6.6 Functional requirements and verification
Where practicable, the performance of the equipment should be monitored throughout the test. The
parameters shall be fully described in the relevant test specification.
At the beginning and the end of scanning (Point "S" on the test climatogram, figure B.1) the equipment
shall be visually examined and functional checks shall be made as prescribed by the test specification.
Functional checks shall also be performed at relevant points on figure B.1 as described in
subclauses B.6.3 and B.6.4, after a minimum period of one hour has elapsed since temperature
stabilization within the equipment. The test specification shall detail which functions are to be checked at
each point on the test climatogram.
Air Tem perature (°C)
Absolute Hum idity (g.m -3)

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SIST ETS 300 019-2-3:1999/A2:1999
Page 12
ETS 300 019-2-3: May 1994/A2: May 1998
Add annexes C, D, E, F
Annex C (normative): Alternative climatic test method for class 3.2
C.1 Description
This test method is an alternative to IEC 68 [2] temperature and most humidity tests. It can also contain
the cold start test given in this ETS 300 019-2-3. The test uses a sequence which scans the characteristic
conditions of the climatogram which is constructed from test severities specified in ETS 300 019-2-3. It
may be applied to all equipment being tested for climatic conformance with class 3.2 in ETS 300 019-1.
NOTE: This test method is made complete with the condensation test (see table 4: Test
specification T 3.2 - Test Db) and should be carried out on the same test specimen.
C.2 Objectives
To provide a standard test method for determining the functionality of an equipment when it is tested in a
variable climatic environment consisting of a simultaneous change in combined values of temperature and
humidity.
The climatogram test takes into account the boundary climatic conditions which can affect equipment
throughout Europe up to an altitude of 3000 metres. The objective of the test is the evaluation of
equipment resistibility performance and no attempt is made to assess its reliability. This is why repairs are
authorized during tests, provided that failures observed do not systematically recur in the same climatic
conditions.
C.3 Test apparatus
The test apparatus shall consist of a single test chamber that is able to reproduce the conditions
described in this annex.
The dimensions of the chamber shall be in accordance with the criteria described in IEC 68-2-56 [2].
NOTE: When climatic stabilization is specified, the time required will vary depending on the
thermal mass of the equipment under test, its heat dissipation and the relative size of
the test chamber.
For naturally ventilated equipment it is important that the air flow in the test chamber is controlled (less
than 1 m/s) near the equipment under test in order to prevent undue influence on its ventilation system.
This will allow components inside the equipment to reach their working temperature in relation to the
ambient conditions of the chamber.
The test chamber is required to control the rate of change of temperature to a maximum of 0,5°C per
minute and the rate of change of relative humidity to a maximum of 10 % per hour with the equipment in
its operational state.
C.4 Methodology
The traditional method used for climatic testing of equipment in order to demonstrate its resistibility is to
use the IEC 68-2 [2] tests (i.e. cold, dry heat, change of temperature and steady state damp heat). The
severities of the tests are chosen to simulate the effects of the extreme climatic conditions of the class.
This annex describes an alternative test method which uses a sequence test following the characteristic
conditions of the climatogram figure C.1.
C.5 Pre-conditioning
Pre-conditioning is required for a minimum period of one hour after temperature stabilization within the
equipment under the initial condition 23°C / 50 % R.H. (i.e. point S on the climatogram of figure C.1).

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SIST ETS 300 019-2-3:1999/A2:1999
Page 13
ETS 300 019-2-3: May 1994/A2: May 1998
C.6 Testing
C.6.1 Equipment operation
The equipment under test shall be in its operational state throughout the tests.
Input and load conditions of the equipment shall be chosen to obtain full utilization of the equipment under
test. The dissipation shall be maximized, except for the low temperature test, where it shall be minimized.
C.6.2 Equipment failures
If a failure occurs, the whole test cycle shall be started again, after the failure has been recorded and
rectified.

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SIST ETS 300 019-2-3:1999/A2:1999
Page 14
ETS 300 019-2-3: May 1994/A2: May 1998
C.6.3 Test severities
Table C.1: Test severities for class 3.2
Protected from solar and heat radiation Exposed to solar and heat radiation and
or equipment is ventilated equipment is not ventilated
Climatic limits Climatic limits
Point Temp RH Point Temp RH
(°C) (%) (°C) (%)
S + 23 (3) 50 (6) S + 23 (3) 50 (6)
A + 45 (3) 45 (6) A + 55 (3) 28 (6)
B + 45 (3) 5 (5) B + 55 (3) 5 (5)
C + 23 (3) 5 (5) C + 23 (3) 5 (5)
D + 5 (2) 15 (5) D + 5 (2) 15 (5)
E - 5 (2), (7) Any (1) E - 5 (2), (7) Any (1)
F + 5 (2) 95 (6) F + 5 (2) 95 (6)
G + 30 (3) 95 (4) G + 30 (3) 95 (4)
A + 45 (3) 45 (6) A + 55 (3) 45 (6)
S + 23 (3) 50 (6) S + 23 (3) 50 (6)
NOTE 1: It is acceptable to perform tests without controlling the humidity when
testing below 5°C (as detailed in IEC 68-2-1 test Ad).
NOTE 2: ± 3°C according to IEC 68-2-1.
NOTE 3: ± 2°C according to IEC 68-2-2 and IEC 68-2-56.
± 3°C is acceptable for certain chamber sizes, as indicated in IEC 68-2-2.
NOTE 4: ± 3% RH according to IEC 68-2-56.
NOTE 5: Low relative humidity to be ± 5%.
NOTE 6: ± 3% RH.
NOTE 7: If the cold start test is required in the product specification, when arriving
at the point E the equipment shall be switched off; after temperature
stabilization is reached within the equipment, it shall be switched on and
the test continued.
C.6.4 Scanning the climatogram
The sequence of scanning the climatogram is shown in figure C.1. Scanning begins at point S and ends at

point S.
The various points of the climatogram correspond with test severities specified in table C.1.

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SIST ETS 300 019-2-3:1999/A2:1999
Page 15
ETS 300 019-2-3: May 1994/A2: May 1998
A
SA:05°C/min
,
B
G
C
S
F
D
E
0 100
Relative Hum idity (% )
Figure C.1: Climatogram showing scanning sequence
C.6.5 Rates of change
The rates of change for temperature and humidity are:
a) 5°C/h during constant relative or absolute humidity;
b) 10% RH/h during constant temperature;
c) 0,5°C/min between point S to point A. This step is used to verify the performance of the equipment

under maximum rate of change of temperature.
NOTE: The cooling gradient may be reduced to 0,2°C/min where test clamber restrictions
preclude a gradient of 0,5°C/min.
C.6.6 Functional requirements and verification
Where practicable, the equipment's performance should be monitored throughout the test. The
parameters shall be fully described in the relevant test specification.
At the beginning and the end of scanning (Point S on the test climatogram, figure C.1), the equipment
shall be visually examined, and functional checks shall be made as prescribed by the test specification.
Functional checks shall also be performed at relevant points on figure C.1, as described in
subclause C.6.4, after a minimum period of one hour has elapsed since temperature stabilization within
the equipment. The test specification shall detail which functions are to be checked at each point on the
test climatogram.
A ir T e m p erature (°C )
A b s o lu te H u m id ity (g .m -3 )

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SIST ETS 300 019-2-3:1999/A2:1999
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ETS 300 019-2-3: May 1994/A2: May 1998
Annex D (normative): Alternative climatic test method for class 3.3
D.1 Description
This test method is an alternative to IEC 68 [2] temperature and most humidity tests. It can contain also
the cold start test given in this ETS 300 019-2-3. The test uses a sequence which scans the characteristic
conditions of the climatogram which is constructed from test severities specified in ETS 300 019-2-3. It
may be applied to all equipment being tested for climatic conformance with class 3.3 in ETS 300 019-1.
NOTE: This test method is made complete with the condensation test (see table 6: Test
specification T 3.3 - Test Db) and should be carried out on the same test specimen.
D.2 Objectives
To provide a standard test method for determining the functionality of an equipment when it is tested in a
variable climatic environment consisting of a simultaneous change in combined values of temperature and
humidity.
The climatogram test takes into account the boundary climatic conditions which can affect equipment
throughout Europe up to an altitude of 3000 metres. The objective of the test is the evaluation of
equipment resistibility performance and no attempt is made to assess its reliability. This is why repairs are
authorized during tests, provided that failures observed do not systematically recur in the sa
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