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TITLE: DRAFT LED substitute category H7/LED

 

PROBLEM STATEMENT:

This is a proposal to add LED substitute category sheets for H7/LED

 

REASON FOR THE CHOSEN SOLUTION:

This is a proposal for addition of new LED substitute categories to R.E.5. The technical provisions were developed based on the equivalence criteria, GRE-80-02 amended for light sources used in RID applications ..

 

 

P. Plathner

W. Schlager

2019-01-15


 

Category H7/LED Sheet H7/LED/1

The drawings are intended only to illustrate the essential dimensions (in mm) of the LED light source.

[PDP1] [PDP2]

 

[PDP3]

 

The drawings are intended only to illustrate the essential dimensions (in mm) of the LED light source

1/ The reference plane is defined by the points on the surfaces of the holder on which the three supporting bosses of the cap ring will rest.

2/ The reference axis is perpendicular to the reference plane and crosses the intersection of the two perpendiculars as indicated in Figure 3.

 

5/ The LED light source shall not exceed the envelope as indicated in Figure 2. The envelope is concentric to the reference axis. [PDP4]

 

 


 

Table 1

Essential electrical and photometrical characteristics of the LED light source

 

Dimensions in mm

LED light sources of normal production

Standard LED light sources

12V

24V

e 2/

25 nom.

f 2/

4.1 nom

Contrast 6/

Minimum [100 ]

Minimum [100]

Maximum [200]

Distance “d” between LEA and glare zone

[PDP5] 0,40

0,40

 

 

 

 

Cap: [ PX26t [PDP6] ] in accordance with IEC Publication 60061 (sheet 7004-[5A]-x])

Electrical and photometric characteristics

4/

 

5/

4/

Rated values

Volts

12

24

12

Watts

xx

xx

xx

Test voltage

Volts (DC)

13.2

28.0

13.2

Objective values

 

Power

Watts

xx

xx

xx

Electrical current

mA

xx

 

(at 9-16V DC)

 

 

xx

 

(at 16-32V DC)

 

xx

 

(at 9-16V DC)

 

Luminous flux 1/ 3/

(at test voltage)

lm

1,500 ± 10%

1, 750 [PDP7]

± 10%

1,500 10 %

Luminous flux 1/

 

lm

xx

(at 9 V DC)

 

xx

(at 16 V DC)

 

xx

(at 9 V DC)

 

 

1/ The light emitted shall be white [PDP8] , without a correlated colour temperature restriction.

2/ To be checked by means of a “box system”, sheet H7/LED/ 2

3/ The value measured at elevated ambient air temperature of 80°C shall be at least 70% of this value

4/ In case of a failure of any of the light emitting elements (open circuit failure), the LED light source shall either still comply to the requirements concerning luminous flux and luminous intensity distribution or stop emitting light whereby, in the latter case, the electrical current draw, when operated between 12 V and 14 V, shall be less than xx mA

 

5/ In case of a failure of any of the light emitting elements (open circuit failure), the LED light source shall either still comply to the requirements concerning luminous flux and luminous intensity distribution or stop emitting light whereby, in the latter case, the electrical current draw, when operated between 24 V and 28 V, shall be less than yy mA

 

6/ The contrast is defined as the ratio of the total luminous flux values emitted into the viewing directions (A and –A) from zone (A+B+C) and zone D.

 


 

Category H7/LED Sheet H7/LED/2

Screen projection requirements

The following test is intended to define the requirements for the apparent light emitting area of the LED light source and to determine whether the light emitting area is correctly positioned relative to the reference axis and reference plane in order to check compliance with the requirements.

The position of the light emitting area is checked by a box system defined in Figure 4 when operated at test voltage, which shows the projections when viewing along the direction = 0 (view from B; see sheet H7/LED/1, Figure 1) and +/- 90° (view from A and -A ; see sheet H7/LED/1, Figure 1 ) in the plane C 0 (C, as defined in Figure 5).

 

The glare zone tested in two directions.

The proportion of the total luminous flux emitted into these viewing directions from the area(s) as defined in figure 4:

(A+B+C) / E shall be not less than [90]%

A/ (A+B+C) shall be not more than [10]%

B1m/B, B2m/B, B3m/B shall each be not less than [15]%

B / (A+B+C) shall be not less than [72] %

C / (A+B+C) shall be not more than [22]%

(A+B+C) / D shall be within the limits of the contrast value given in the Table 1 (see Figure 4B for the definition of the box D)

Figure 4

Box definition of the light emitting area 

[PDP9]

[PDP10]

[PDP11]

Figure 4B Box definition of the glare zone D

 


Table 2

Dimensions of the box system in figure 2

 

All views

(as specified above)

12V and 24V

Dimensions in mm

 

a1

1.6

a2

1.8

b1

0.2

b2

0.2

c1

4.6

c2

4.0

x1

25 (??)

x2

19

y1

10 (??)

g1

2.7

g2

6.9

g3

1.35

 

 


Category H7/LED Sheet H7/LED/3

Normalized luminous intensity distribution

The following test is intended to determine the normalized luminous intensity distribution of the light source in the C-planes as described in Figure 5 when operated at test voltage. The intersection of the reference axis and the reference plane is used as the coordinate system origin.

The light source is mounted on a flat plate with the corresponding holder features. The plate is fixed to the goniometer table by a bracket, so that the reference axis of the light source lines up with one of the rotating axis of the goniometer. The corresponding measurement set-up is described in Figure 5 .

Luminous intensity data is recorded with a standard photo-goniometer. The measurement distance should be chosen appropriately in order to make sure that the detector is located in the far field of the light distribution.

The measurements shall be performed in C-planes, whose line of intersection is given by V-V ( see sheet H7/LED/1, Figure 1) at distance e from the reference plane . The C-planes to be measured shall be C 0 , C [50] and C [310] as well as part of C 90 plane. [SW12] The test points for each plane and multiple polar angles are specified in Table 3.

The measured luminous intensity values, normalised to the measured luminous flux of the individual light source under test, shall be converted to normalised luminous intensity values of a 1000 lm light source.  These data shall comply with the tolerance band as defined in Table 3.

Figure 5
Setup to measure the luminous intensity distribution

(Definition of C-Planes and angle )

[PDP13]

 

C-planes: see CIE publication 70-1987, "The measurement of absolute intensity distributions".


Category H7/LED Sheet H7/LED/4

 

Table 3

Test point values of normalized intensity

 

LED light source of normal production

Standard LED light source

Minimum intensity

(cd/klm)

Maximum intensity

(cd/klm)

Minimum intensity

(cd/klm)

Maximum intensity

(cd/klm)

 

C0

C50, C310

C90

C0

C50, C310

C90

 

 

- 150°

[80]

-

-

[130]

-

-

 

 

- 135°

[80]

[80]

-

[130]

[130]

-

 

 

- 120°

[80]

[80]

-

[130]

[130]

-

 

 

- 105°

[80]

[80]

-

[130]

[130]

-

 

 

- 90°

[80]

[80]

-

[130]

[130]

-

 

 

- 75°

[80]

[80]

-

[130]

[130]

-

 

 

- 60°

[80]

[80]

-

[130]

[130]

-

 

 

- 45°

[80]

[80]

-

[130]

[130]

-

 

 

- 30°

[80]

[80]

-

[130]

[130]

-

 

 

- 15°

[80]

[80]

-

[130]

[130]

-

 

 

0

[80]

[80]

-

[130]

[130]

-

 

 

15°

[80]

[80]

-

[130]

[130]

-

 

 

30°

[80]

[80]

-

[130]

[130]

-

 

 

45°

[80]

[80]

-

[130]

[130]

-

 

 

60°

[80]

[80]

-

[130]

[130]

[10]

 

 

75°

[80]

[80]

-

[130]

[130]

[10]

 

 

90°

[80]

[80]

-

[130]

[130]

[10]

 

 

105°

[80]

[80]

-

[130]

[130]

[10]

 

 

120°

[80]

[80]

-

[130]

[130]

[10]

 

 

135°

[80]

[80]

-

[130]

[130]

-

 

 

150°

[80]

-

-

[130]

-

-

 

 

 

The luminous intensity distribution as described in Table 3 shall be substantially uniform, i.e. in between two adjacent grid points the relative luminous intensity requirement is calculated by linear interpolation using the two adjacent grid points.

 


[PDP1] Footnote 4 is deleted, Figure needs to be updated accordingly

[PDP2] The cap drawing needs to be amended to reflect the interlock

[PDP3] The Figure titles need to be adapted

[PDP4] This needs to be re-numbered to /3, also in the drawing; and update drawings (e.g. delete not-needed footnotes)

[PDP5] Either include these values here or in the LEA requirements

[PDP6] The new cap designation needs to be inserted here

[PDP7] Should this also be 1,500 ?

[PDP8] Selective yellow not included

[PDP9] This Figure still needs to be finalized

[PDP10] This Figure still needs to be finalized

[PDP11] This Figure still needs to be finalized

[SW12] Representing the area covered by the black top of the corresponding filament version.

[PDP13] This figure needs to be adapted for the H7