DS7840 OSRAM, DS7840 Datasheet - Page 52

• Manufacturer Part Number: DS7840
• Description: LAMP, DULUX, S, COOL, 7W
• Manufacturer: OSRAM

Specifications of DS7840

• Supply Voltage: 47V
• Base Type: 2 Pin
• Power Rating: 7W
• Luminous Flux: 400lm
• Length: 137mm
• Colour Temperature Typ: 4000K
• Svhc: No SVHC (15-Dec-2010)
• External Depth: 19.5mm
• External Diameter: 19.5mm
• External: RoHS Compliant
• Lamp Base Type: 2 Pin
• Rohs Compliant: Yes
• Average Bulb Life: 8000h
• Bulb Diameter: 19.5mm

Economical long-life light sources with plug-in bases.
Compact Fluorescent Lamps OSRAM DULUX
Technical Guide
4.8
Lamp
temperatures and
limiting values
Temperature measuring points:
DULUX
Temperature measuring points are defined for OSRAM DULUX
at these points must be within the thresholds for the safe and reliable operation of the lamps.
The following limit temperatures must not be exceeded at these points even under
adverse installation conditions (in the luminaire, high room temperatures) and at high
supply voltages:
1)
2)
Measuring Description
measuring
measuring
measuring
measuring
Cold spot
Electrode
Amalgam
Measuring conditions: 25°C ambient temperature, draught free air
Measuring conditions: Short-circuited starter
point
point
point
point
point
IEC
0
1
2
3
®
S
0
1
2
3
burning position and a free-burning lamp. In certain circumstances and
This point is located at the bottom of the base and is determined by
the thermal load capacity of the glow starter installed in the bases of
two-pin lamps for conventional operation. It is therefore relevant only
for these lamps (OSRAM DULUX
The hottest point on the surface of the base on a line which on G23,
2G7 bases (OSRAM DULUX
and on G24, GX24, 2G10 and 2G11 bases (OSRAM DULUX
T, T/E, L and F) 12 mm from the reference plane in the direction of the
glass bulb. The limit value for this measuring point has been defined
in the relevant standard for safety reasons. (If this maximum
temperature is exceeded the plastic base may start to soften
(applies to end of life).)
Measuring point 2 at the glass tube near the filament is the hottest
point on the lamp. Measurements are taken 5 mm from the edge of
the base.
Applies only to OSRAM DULUX
lamps without amalgam. Corresponds to the cold spot for base-up
with other burning positions in the luminaire, however, the cold spot
may be somewhere other than measuring point 3.
Exceeding the maximum permitted temperature has a considerable
impact on the electrical and photometric data of the lamp and will
cause the lamp to fail.
Amalgam lamps: The measuring point for amalgam lamps is
on the lamp glass of the amalgam reservoir inside the lamp base.
This temperature can be measured only with specially prepared lamps. luminous flux)
DULUX
®
Reference ballast
Supply voltage U
25°C ambient temperature, draught free air
Supply voltage U
Reference ballast
®
1
2
3
S/E
DULUX
DULUX
V
V
®
®
= 1.06 x U
= 1.1 x U
D
D/E
®
3
0
1
2
S and OSRAM DULUX
®
®
2-pin and OSRAM DULUX
rated
S, D, T and T IN).
rated
DULUX
DULUX
®
®
T
T/E
1
0
2
3
®
4. Operating characteristics
S/E) is 8 mm
DULUX
®
lamps. The temperatures
®
®
4-pin
®
D, D/E,
1
2
3
L
DULUX
optimum 40°–
Max.temp.
90°C
according to
EN 60901
140°C
according to
EN 61199
Information
for luminaire
design as
per IEC.
max. 190 °C
In CCG and
ECG operation
max. 100 °C
(approx. 60%
luminous flux)
50°C (=100%
luminous flux)
85°–115°C
(= 90 %
®
1)
2)
F
1
2
3
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