ExTR Reference No. NO/NEM/ExTR12.0011/01 · Temperature for small ... specification of casting compound material 3M™ High Gel Re-enterable Encapsulant 8882 is a ... (Continuous

ExTR Reference No. NO/NEM/ExTR12.0011/01

TRF No. ExTR60079-11_6A Page 1 of 20

ExTR Reference Number ............... : NO/NEM/ExTR12.0011/01

ExTR Free Reference Number....... : D0001825

Compiled by + signature (ExTL) ..... : Stig André Norheim

Reviewed by + signature (ExTL) .... : Arne Hortman

Date of issue................................... : 2015-07-07

Ex Testing Laboratory (ExTL) ........ :

Address .......................................... : Gaustadalléen 30, N-0373 Oslo, Norway

Applicant’s name ............................ : Kongsberg Maritime AS

Address .......................................... : Haakon VIIs gt. 4

N-7005 Trondheim, Norway

Standard ......................................... : IEC 60079-11:2011, 6th Edition

Test procedure ............................... : IECEx System

Test Report Form Number ............. : ExTR60079-11_6A (released 2011-08)

Instructions for Intended Use of Ex Test Report: An Ex Test Report provides a clause-by-clause documentation of the initial evaluation and testing that verified compliance of an item or product with an IEC Ex standard. This Ex Test Report is part of an ExTR package that may include other Ex Test Report, Addendum and National Differences documents, along with a single ExTR Cover. An Ex Test Report is to be compiled and reviewed by the ExTL. The Issuing ExCB indicates final approval of the Ex Test Report as part of the overall ExTR package on the associated ExTR Cover.

Copyright © 2011 International Electrotechnical Commission System for Certification to Standards Relating to Equipment for use in Explosive Atmospheres (IECEx System), Geneva, Switzerland. All rights reserved. This blank publication may be reproduced in whole or in part for non-commercial purposes as long as the IECEx System is acknowledged as copyright owner and source of the material. The IECEx system takes no responsibility for, and will not assume liability for, damages resulting from the reader's interpretation of the reproduced material due to its placement and context.

Possible test case verdicts:

- test case does not apply to the test item ..................... :N / A

- test item does meet the requirement ........................... :Pass

General remarks: The test results presented in this Ex Test Report relate only to the item or product tested.

"(see Attachment #)" refers to additional information appended to this document. "(see appended table)" refers to a table appended to this document. Throughout this document, a point “.” is used as the decimal separator.

The technical content of this Ex Test Report shall not be reproduced except in full without the written approval of the Issuing ExCB and ExTL.

IECEx TEST REPORT IEC 60079-11

Explosive atmospheres – Part 11:

Equipment protection by intrinsic safety "i"



IEC 60079-11

Clause Requirement – Test Result – Remark Verdict

1 Scope

2 Normative references

3 Terms and definitions

4 Grouping and classification of intrinsically safe apparatus and associated apparatus Pass

5 Levels of protection and ignition compliance requirements of electrical apparatus

5.1 General Intrinsically safe apparatus applies to level of protection “ia”

Pass

5.2 Level of protection "ia" One fault, two faults and numerous non-countable faults have been applied for the testing and assessment.

Refer to Appendix A.1 for details.

Pass

5.3 Level of protection "ib" Level of protection "ia" N/A

5.4 Level of protection "ic" Level of protection "ia" N/A

5.5 Spark ignition compliance Refer to Appendix A.2 for details. Pass

5.6 Thermal ignition compliance

5.6.1 General Refer to Appendix A.3 for details. Pass

5.6.2 Temperature for small components for Group I and Group II

Refer to Appendix A.3.1 for details. Pass

5.6.3 Wiring within intrinsically safe apparatus for Group I and Group II

A Cu-screened cable is used from the transmitter to the monitoring system. Minimum cross cable is 2 x 0.5 mm2. The Cu-screen is grounded in the M20 or M25 cable gland on the transmitter, see Installation manual. Refer to Appendix A.3.2 for details.

Pass

5.6.4 Tracks on printed circuit boards for Group I and Group II

Refer to Appendix A.3.3 for details. Pass

5.6.5 Intrinsically safe apparatus and component temperature for Group III

Group II N/A

5.7 Simple apparatus Not a simple apparatus. N/A



IEC 60079-11


6 Apparatus construction

6.1 Enclosures

6.1.1 General The apparatus is completely encapsulated and have a degree of protection better than IP 20

Pass

6.1.2 Enclosures for Group I or Group II apparatus

6.1.2.1 General N/A

6.1.2.2 Apparatus complying with Table 5

N/A

6.1.2.3 Apparatus complying with Annex F

N/A

6.1.3 Enclosures for Group III apparatus

N/A

6.2 Facilities for connection of external circuits

6.2.1 Terminals The terminals are only for one intrinsically safe circuit and the enclosure is of insulating material.

Pass

6.2.2 Plugs and sockets No plugs and sockets. N/A

6.2.3

Determination of maximum external inductance to resistance ratio (Lo/Ro) for resistance limited power source

Not a power supply apparatus. N/A

6.2.4 Permanently connected cable Are not used. N/A

6.2.5 Requirements for connections and accessories for IS apparatus when located in the non-hazardous area

Not a such apparatus. N/A

6.3 Separation distances

6.3.1 General Pass

6.3.2 Separation of conductive parts The intrinsic safety of the equipment depends on safe separation distances.

Pass

6.3.2.1 Distances according to Table 5 Column 3 and 4 in table 5 has been evaluated for safety distances.

Pass

6.3.2.2 Distances according to Annex F Not used. N/A

6.3.3 Voltage between conductive parts

The max voltage supplied by a certified barrier is 28V and reduced to 6.2V shunt protected VCC internal voltage.

Pass

6.3.4 Clearance The clearances is at least 2mm. See description of each construction in the Appendix.

Pass



IEC 60079-11


6.3.5 Separation distances through casting compound

The circuit board is encapsulated in accordance with line 3 Table 5 in EN 60079-11. The specification of casting compound material 3M™ High Gel Re-enterable Encapsulant 8882 is a two-part nonurethane encapsulating compound. Maximum temperature rating 212F/100°C

Separation distances measured at least >>0.7mm (30V from table 5)

Pass

6.3.6 Separation distances through solid insulation

The separation distances are at least 0.5mm according to table 5 @ voltage 30V.

Pass

6.3.7 Composite separations Not used. N/A

6.3.8 Creepage distance The VDD layer has an infallible to the shunt assembly D2 and D3 as the circuit tracks is 2mm. Safety components as current resistors are described in Appendix A.5 Separation distances. Opto-couplers U6, U12 are measured with a creepage distances at least 0,7mm.

Pass

6.3.9 Distance under coating The creepage distance under encapsulation is at least 0.5mm / 0.7mm.

Pass

6.3.10 Requirements for assembled printed circuit boards

Not used. N/A

6.3.11 Separation by earthed screens Not used. N/A

6.3.12 Internal wiring The wiring is encapsulated. The current load of the wires is negligible with respect to eh copper area.

Pass

6.3.13 Dielectric strength requirement

Voltage test with 500V AC 50Hz was performed and leakage current 1.6mA. The circuit is connected to the chassis with two serial connected capacitors.

Pass

6.3.14 Relays Not used. N/A

6.4 Protection against polarity reversal

The safety aspect doesn’t depend on having correct polarity.

N/A

6.5 Earth conductors, connections and terminals

No earth conductors. N/A

6.6 Encapsulation

6.6.1 General All circuits encapsulated and fault conditions within the compound were assessed.

Pass



IEC 60079-11


6.6.2 Encapsulation used for the exclusion of explosive atmospheres

The complete circuit is encapsulated and will exclude the explosive atmosphere as well as protect the boards/circuits against contamination.

a) Maximum temperature rating: 212F/100°C continuous. (Continuous Operating Temperature)

b) CTI (tracking resistance) omitted reason of that there are no connection pins or components coming up through the surface of encapsulation.

c) The casting compound is protected by a steel tube. No free surface exposed.

d) All conductive parts, components and substrates are totally enclosed by the casting compound.

e) The specification of casting compound material by manufacturer 3M™ High Gel Re-enterable Encapsulant 8882 is a two-part nonurethane encapsulating compound.

Pass

7 Components on which intrinsic safety depends

7.1 Rating of components The safety components are rated with at least a safety factor of 1,5. The safety components and the rating is described in the Appendix A.4

The safety components are current limiting resistors 0,25W SMD 1206 and shunt zener diodes 6,2V and also shottky diodes. Diodes V14 (transient protection).

Pass

7.2 Connectors for internal connections, plug-in cards and components

No such connectors or connections in the apparatus.

N/A

7.3 Fuses Not used. N/A

7.4 Primary and secondary cells and batteries

7.4.1 General Not used. N/A

7.4.2 Battery construction N/A

7.4.3 Electrolyte leakage and ventilation

N/A

7.4.4 Cell voltages N/A

7.4.5 Internal resistance of cell or battery

N/A

7.4.6 Batteries in equipment protected by other types of protection

N/A

7.4.7 Batteries used and replaced in explosive atmospheres

N/A



IEC 60079-11


7.4.8 Batteries used but not replaced in explosive atmospheres

N/A

7.4.9 External contacts for charging batteries

N/A

7.5 Semiconductors

7.5.1 Transient effects Fed from a certified zener barrier. N/A

7.5.2 Shunt voltage limiters Used to clamp the voltage to 6.2V (infallible level). The shunt diodes are rated with a safety factor of a least 1.5 in the zener direction and 1.5 times the current in the forward direction. See Appendix A.4.2 for details.

Pass

7.5.3 Series current limiters Not used. N/A

7.6 Failure of components, connections and separations

The connection of the shunt diodes are infallible. The described failure modes in components (resistors, semiconductors, capacitors, connections) have been applied.

Pass

7.7 Piezo-electric devices Not used. N/A

7.8 Electrochemical cells for the detection of gases

Not used. N/A

8 Infallible components, infallible assemblies of components and infallible connections on which intrinsic safety depends

8.1 Level of Protection “ic” Not used. N/A

8.2 Mains transformers


8.2.2 Protective measures Not used. N/A

8.2.3 Transformer construction Not used. N/A

8.2.4 Transformer type tests Not used. N/A

8.2.5 Routine test of mains transformers

Not used. N/A

8.3 Transformers other than mains transformers

Not used. N/A

8.4 Infallible windings

8.4.1 Damping windings Not used. N/A

8.4.2 Inductors made by insulated conductors



IEC 60079-11


8.5 Current-limiting resistors See Appendix A.4 for details.

The equipment contains current limiting resistors that are of the SMD 1206 250mW type resistors. The loading of each component is described in the mentioned appendix above.

Pass

8.6 Capacitors

8.6.1 Blocking capacitors Not used. N/A

8.6.2 Filter capacitors Not used. N/A

8.7 Shunt safety assemblies

8.7.1 General Apparatus fed from a certified zener barrier model DZ-110 and it’s safety parameters (Uo, Po, Io) applied to the intrinsically safe circuit. See drw.no. GT-1311

Pass

8.7.2 Safety shunts Not connected to power supplies defined only by Um.

N/A

8.7.3 Shunt voltage limiters Certified zener barrier with defined voltage on 28V is applied to the intrinsically safe circuit. Double assemblies of zener diodes used to clamp the voltage at an infallible level 6.2V. Rated with a safety factor of 1.5 in zener direction and 1.5 times the current in the forward direction. See Appendix A.4.2 Shunt Voltage Limiters for details.

Pass

8.8 Wiring, printed circuit board tracks, and connections

The connection of the shunt diodes are infallible since the diodes are connected to the voltage layer with more than 2mm and thickness 35µm.

Pass

8.9 Galvanically separating components

8.9.1 General Are not used. N/A

8.9.2 Isolating components between intrinsically safe and non-intrinsically safe circuits

N/A

8.9.3 Isolating components between separate intrinsically safe circuits

N/A

9 Supplementary requirements for specific apparatus

9.1 Diode safety barriers

9.1.1 General This is not a single diode safety barrier. N/A

9.1.2 Construction

9.1.2.1 Mounting N/A



IEC 60079-11


9.1.2.2 Facilities for connection to earth N/A

9.1.2.3 Protection of components N/A

9.2 FISCO apparatus Not a FISCO apparatus. N/A

9.3 Handlights and caplights Handlights and caplights not used. N/A

10 Type verifications and type tests

10.1 Spark ignition test

10.1.1 General The test is described in the Appendix A.2 for details.

Pass

10.1.2 Spark test apparatus The standard STA was used. Pass

10.1.3 Test gas mixtures and spark test apparatus calibration current

10.1.3.1 Explosive test mixtures suitable for tests with a safety factor of 1.0 and calibration current of the spark test apparatus

The voltage was increased to achieve the safety factor of 1.5 and the tests have been carried out according to EN 60079-11 with 21% Hydrogen.

The 95mH 30mA, 24V was used.

Pass

10.1.3.2

Explosive test mixtures suitable for tests with a safety factor of 1.5 and calibration current of the spark test apparatus

Not used. N/A

10.1.4 Tests with the spark test apparatus

10.1.4.1 Circuit test The board was tested for establishing the internal capacitance as seen from the terminals. The test is described in the Appendix A.2 for details.

Pass

10.1.4.2 Safety factors The safety factors were 1.5 for the tests. Pass

10.1.5 Testing considerations

10.1.5.1 General Spark ignition tests were carried out with the circuit arranged to give the most incendive conditions.

Pass

10.1.5.2 Circuits with both inductance and capacitance

None. N/A

10.1.5.3 Circuits using shunt short-circuit (crowbar) protection

None. N/A

10.1.5.4 Results of spark test The circuit did not ignite the gas mixture for the final test.

Pass

10.2 Temperature tests The temperature assessment was based on measurements. Ref. Appendix B Tests.

Pass

10.3 Dielectric strength tests Performed between the connection terminals and the metal enclosure. Ref. Appendix B Tests

Pass



IEC 60079-11


10.4 Determination of parameters of loosely specified components

The components are well defined. N/A

10.5 Tests for cells and batteries

10.5.1 General No cells and batteries in the apparatus. N/A

10.5.2 Electrolyte leakage test for cells and batteries

N/A

10.5.3 Spark ignition and surface temperature of cells and batteries

N/A

10.5.4 Battery container pressure tests N/A

10.6 Mechanical tests

10.6.1 Casting compound Casting compound has no exposed surface. It is mounted inside an metal housing, deemed unnecessary.

Pass

10.6.2 Determination of the acceptability of fuses requiring encapsulation

Not used. N/A

10.6.3 Partitions Not used. N/A

10.7 Tests for intrinsically safe apparatus containing piezoelectric devices

Not used. N/A

10.8 Type tests for diode safety barriers and safety shunts

Are not used (not applicable to transient effects). N/A

10.9 Cable pull test Not used. N/A

10.10 Transformer tests Not used. N/A

10.11 Optical isolators tests


10.11.2 Thermal conditioning, dielectric and carbonisation test

N/A

10.11.2.1 Overload test at the receiver side

N/A

10.11.2.2 Overload test at the transmitter side

N/A

10.11.2.3 Thermal conditioning and dielectric strength test

N/A

10.11.2.4 Carbonisation test

10.11.2.4.1 Receiver side N/A



IEC 60079-11


10.11.2.4.2 Transmitter side N/A

10.11.3 Dielectric and short-circuit test N/A

10.11.3.1 General N/A

10.11.3.2 Pre-test dielectric N/A

10.11.3.3 Short-circuit current test N/A

10.11.3.4 Current limited short-circuit current test

N/A

10.11.3.5 Dielectric strength test N/A

10.12 Current carrying capacity of infallible printed circuit board connections

Not utilized.

N/A

11 Routine verifications and tests

11.1 Routine tests for diode safety barriers

11.1.1 Completed barriers Not utilized.

N/A

11.1.2 Diodes for 2-diode “ia” barriers Not utilized.

N/A

11.2 Routine tests for infallible transformers

Not utilized.

N/A

12 Marking

12.1 General Complies with the requirements. This Intrinsically safe apparatus is marked according to requirements specified in EN/IEC 60079-0

Pass

12.2 Marking of connection facilities Ref. APPENDIX A: Description of product Pass

12.3 Warning markings None. N/A

12.4 Examples of marking N/A

13 Documentation The documentation include the instructions required by Clause 30 of EN/IEC 60079-0, and include marking information as applicable after clause 12 above.

Pass

Annex A (Normative)

Assessment of intrinsically safe circuits

A.1 Basic criteria Intrinsically safe circuits assessed after the criteria in a), b) and c)

Pass



IEC 60079-11


A.2 Assessment using reference curves and tables

Assessment by using reference curves and tables written in Annex A

Pass

A.3 Examples of simple circuits N/A

A.4 Permitted reduction of effective capacitance when protected by a series resistance

Not utilized.

N/A

Annex B (Normative)

Spark test apparatus for intrinsically safe circuits

B.1 Test methods for spark ignition

B.1.1 Principle Not utilized.

N/A

B.1.2 Apparatus Not utilized.

N/A

B.1.3 Calibration of spark test apparatus

Not utilized.

N/A

B.1.4 Preparation and cleaning of tungsten wires

Not utilized.

N/A

B.1.5 Conditioning a new cadmium disc

Not utilized.

N/A

B.1.6 Limitations of the apparatus Not utilized.

N/A

B.1.7 Modifications of test apparatus for use at higher currents

Not utilized.

N/A

Annex C (Informative)

Measurement of creepage distances, clearances and separation distances through casting compound and through solid insulation

Annex D (Normative)

Encapsulation

D.1 Adherence The adhesion of the encapsulation is verified and checked. Results are satisfactory good.

Pass

D.2 Temperature The casting compound have a temperature rating conforming to 6.6.

Pass

Annex E (Informative)

Transient energy test

Annex F (Normative)

Alternative separation distances for assembled printed circuit boards and separation of components

F.1 General Not utilized.

N/A



IEC 60079-11


F.2 Control of pollution access Not utilized.

N/A

F.3 Distances for printed circuit boards and separation of components

F.3.1 Level of protection “ia” and “ib” Not utilized.

N/A

F.3.2 Level of protection “ic” Not utilized.

N/A

Annex G (Normative)

Fieldbus intrinsically safe concept (FISCO) – Apparatus requirements

G.1 Overview Not utilized.

N/A

G.2 Apparatus requirements

G.2.1 General Not utilized.

N/A

G.2.2 FISCO power supplies

G.2.2.1 General Not utilized.

N/A

G.2.2.2 Additional requirements of ‘ia’ and ‘ib’ FISCO power supplies

Not utilized.

N/A

G.2.2.3 Additional requirements of ‘ic’ FISCO power supplies

Not utilized.

N/A

G.3 FISCO field devices

G.3.1 General Not utilized.

N/A

G.3.2 Additional requirements of ‘ia’ and ‘ib’ FISCO field devices

Not utilized.

N/A

G.3.3 Additional requirement of ‘ic’ FISCO field devices

Not utilized.

N/A

G.3.4 Terminator Not utilized.

N/A

G.3.5 Simple apparatus Not utilized.

N/A

G.4 Marking Not utilized.

N/A

G.4.1 Examples of marking Not utilized.

N/A

Annex H (Informative)

Ignition testing of semiconductor limiting power supply circuits



Measurement Section, including Additional Narrative Remarks APPENDIX A: Description of product A.1 General overview The GT402, GT403 and GT404 Pressure transmitter series are designed for general purposes in maritime applications inside and on open-deck installations. Typical gauging applications are atmospheric pressure, inert gas pressure, level in ballast and service tanks (external mounting). A Pressure transmitter with accuracy class E and F is made to meet specifications for use in LNG applications. The transmitter is available as an absolute type, sealed gauge or a gauge type, with pressure ranges from 0.25 to 600 Bar. Other pressure ranges may be delivered. Zero and full range (4 to 20 mA) may be adjusted with a PC and HART modem or a HART Communicator. For seawater applications a transmitter with front adapter in Titanium is available. Product pictures of pressure transmitter GT402, GT403 and GT404 below:



Product pictures of pressure transmitter GT420, GT422 and GT423 below: The GT420, GT422 and GT423 are three new differential pressure transmitters of the Kongsberg Maritime GT400 series family. They are designed for general purpose use in maritime and offshore applications. A differential pressure can be measured between two points on independent systems or between two different points. Typical applications for measuring differential pressure are as follows: 1) Hydrostatic level measurement of a tank’s content, where the gas of the top of the tank is not vented. 2) Leakage monitoring by measuring the difference in pressure between a controlled reference pressure and the component under test pressurized to the same pressure. 3) Density measurement of a fluid where a reference height indirectly gives the density. 4) Filtration monitoring where the difference between upstream and downstream pressure indicates the contamination of the filter. The transmitter is available with pressure ranges up to 25 bar.

Control sketch:



Type designation for the GT series :



A.2 Spark ignition consideration A.2.1 Resistive spark ignition The intrinsically safe apparatus shall be connected to certified zener barrier (e.g. DZ-110) with linear resistive output characteristic, with the following max parameters: Uo: 28V, Io: 150mA, Po: 0.85W A.2.2 Inductive spark ignition Maximum internal inductance Li is evaluated by L1 and L2, 2x2µH=4µH. See additional information below.

A.2.3 Capacitive spark ignition Capacitor C22 100nF 20% may be charged to 28V. The max permissible value at 28V is 83nF. Two faults have to be applied in order to make a discharge from C22 through V6-V10 and V14. The max capacitance at 1.0 safety factor is 272nF. The capacitor may also be discharged through R52 and the 2x39Ω resistance will reduce the energy to a non-incendive level. The discharge current is 28V/ (3x20 + 3x16) x 0.98 = 0.324A and exceeds the limit 120mA. The circuit is tested in the spark test apparatus: The capacitance 120nF serial connected with 129.2Ω was connected to an additional external capacitor of 250nF and charged to 28V. The 21% hydrogen mixture was not ignited during the 2.5minutes (+) + 2.5minutes (-) test. The Ci of the apparatus is equal to 272nF (limit for 28V) - 250nF = 22nF. The inductance of the apparatus is 2 x 2µH. Ui= 28V, Pi= 0,85W Ii= 150mA (linear resistive output characteristic) Ci=22nF Li=4µH



Capacitors in the VCC circuit: VCC level 6.2V +5%: 6,6 + temp coeff 3,7mV/K Umax: 6.6 + 85-25x0.0037= 6.82V The sum of capacitance included a 20% tolerance is 5.8µF Max permissible capacitance at 6.82v is 17.9µFfor group IIC. A.2.4 Combination of inductive and capacitive spark ignition Not applicable A.2.5 Shunt short-circuit (crowbar) spark ignition Not applicable A.2.6 Other spark ignition considerations Not applicable A.3 Thermal ignition consideration A.3.1 Temperature for small components The components is less than 20mm

2 and temp 139°C → T5 (max 150°C ). Tamb=+85°C

The calculations assume a linear resistive output characteristic of the supply barrier and the values 28V, 0.85W and 150mA. The resistors R50 and R54 limit the power to the V14: Pmax: 28

2 / (201 + (4x16 + 4x18)x 0,98) x 0,25 = 0.50W

Pmax: 282 / (230 + 4x16 + 4x18) x 0,25= 0.54W

T= 32K (according to Nemko report 200017122) Temp: 32K + 85°C + 5K = 122°C and less than 150°C Measured on a SOT 23 component and a SMD1206 resistor: SOT 23:

T= 39K Temp: 39K + 85°C + 5K = 129°C and less than 150°C SMD1206:

T= 49K Temp: 49K + 85°C + 5K = 139°C and less than 150°C A.3.2 Wiring within apparatus Diameter and cross-sectional area are the nominal dimensions specified by the wire manufacturer. Minimum cross cable is 2 x 0.5 mm

2 which allowed maximum permissible current ≤ 6.9Amps for

temperature classification T5. Max. current connected from the barrier into the circuit is 150mA. A.3.3 Tracks on printed circuit boards Temperature classification of tracks on printed circuit board is evaluated out from the maximum permissible current in the circuit. Temperature classification T5 is accepted since the track width is minimum 0.25mm and the current is less than 1.65A.



A.4 Rating of components A.4.1 Resistors The listed resistors are infallible components according to clause 7.1 rating of components and 8.4 Current-limiting resistors R50A-D / 4 x 16Ω, 0.25W 2% R54A-D / 4 x 18Ω, 0.25W 2% 8 resistors and max 0.85W: 0.85/8= 0.106W x 1.5 = 0.159W and rated 0.25W The load of the following resistors will always be less since they are connected in direct series with the first 8 resistors R50 and R54 A.4.2 Shunt voltage limiters R52A-B / 2 x 39Ω, 0.25W 2% R51A-D / 4 x 56Ω, 0.25W 2% R53A-D / 4 x 56Ω, 0.25W 2% R54 / 3 x 20Ω, 0.25W 2% R55 / 18Ω , 0.25W 2% R32 / 270kΩ 0.25W 1% R38 / 68kΩ 0.25W 1% R14 / 150 kΩ 0.25W, 1% Zener diodes V7 and V8: 0.5W, 6.2V 5%, Tj max 200°C. Tja= 380K/W. Tj = 380K/W x 0.29W + 85° = 195°C< 200°C Max load: 28-6.2/(230+2x39 + 4 x 56 + 4x16+ 4x18 + 18) x 6.2 x 1.5 = 0.29W. Max load: 26-6.2//(201+2x39 + 4 x 56 + 4x16+ 4x18 + 18) x 6.2 x 1.5 = 0.28W. Max load at 28V, not considering barrier resistance: 28-6.2/(2x39 + 4 x 56 + 4x16+ 4x18 + 18) x 6.2 x 1.5 = 0.45W (rated 0.5W). The load is considered acceptable taking the rating and the encapsulation into account. Diodes V6 and V10 rated 70V, 250mA. Safety factors min: 70/28 = 2.5 >1.5 and 250/130= 1.92 >1.5. A.4.3 Series current limiter A.4.4 __________ Not applicable. Not used. A.5 Separation Distances B: Bare board, C: Coated, E: Encapsulated, S: Solid

Safety Comp.

Voltage [V] Measured [mm] Required [mm] B, C, E, S

R50 28 0,73 0,7 E

R54 28 0,8 0,7 E

R51 28 1,1 0,7 E

R52 28 0,9 0,7 E

R53 28 1,0 0,7 E

R55 28 1,1 0,7 E

R32 28 1,4 0,7 E

R14 28 1,0 0,7 E



APPENDIX B: Tests Option 1: If tests records are provided as an attachment, please complete the following table:

Document number Number of Pages Name of Tests

-- -- --

-- -- --

-- -- --

Option 2: If tests records are not provided as an attachment, please complete the following table: B.1 Test conducted

Equipment Tested: GT4x family series

Date of Test (yyyy/mm/dd): May 2002(Report 200206132)

Clause and Standards: 6.3.12 and 10.3 (EN 60079-11: 2007 / IEC 60079-11: 2006)

B.1.1 Test procedures Voltage test with 500VAC 50Hz was performed between the serial capacitors input terminal and earth. Leakage current less than 1.6mA. B.1.2 Results

Test is acceptable. No breakdown of insulation or visible damage on the equipment. B.2 Test conducted


Date of Test (yyyy/mm/dd): May 2002(Report 200206132)

Clause and Standards: 5.6.1 and 10.2 (EN 60079-11: 2007 / IEC 60079-11: 2006)

B.2.1 Test procedures Temperature classification: The calculations assume a linear resistive output characteristic of the supply barrier and the values 28V, 0.85W and 130mA. The resistors R50 and R54 limit the power to the V14: Pmax: 26

2 / (201 + (4x16 + 4x18)x 0.98) x 0,25 = 0.50W

Pmax: 282 / (230 + 4x16 + 4x18) x 0.25= 0,54W

T= 32K (according to report 200017122) Temp: 32K + 85°C + 5K = 122°C and less than 150°C B.2.2 Results Measured on a SOT 23 component and a SMD1206 resistor: SOT 23:

T= 39K Temp: 39K + 85°C + 5K = 129°C and less than 150°C SMD1206:

T= 49K Temp: 49K + 85°C + 5K = 139°C and less than 150°C



B.3 Test conducted


Date of Test (yyyy/mm/dd): April 2002(Report 200206132)

Clause and Standards: 10.1 (EN 60079-11: 2007 / IEC 60079-11: 2006)

B.3.1 Test procedures

Tested at 28V which tolerate max. 272nF. External capacitance with 250nF was connected . 1. Calibrate O and 21.95% O2. 2.Calibrating circuit; 16.54% O2, 24V, 30.3mA. Ignition after 24sek. 3. Circuit test at 16.54% O2, measured 28V, test performed 2.5min + 2.5min: No ignition and acceptable. Capacitance can be placed to 272 – 250 = 22nF B.3.2 Results The circuit is tested in the spark test apparatus: The capacitance 120nF serial connected with 129.2Ω was connected to an additional external capacitor of 250nF and charged to 28V. The 21% hydrogen mixture was not ignited during the 2.5minutes (+) + 2.5minutes (-) test. The Ci of the apparatus is equal to 272nF (limit for 28V) - 250nF = 22nF. The inductance of the apparatus is 2 x 2µH.

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