D7BCT datasheet(21/54 Pages) OSRAM

21 / 54 page

1. General

OSRAM DULUX® EL – electronic energy saving lamps

Economical alternatives to ordinary light bulbs

Technical Guide

How it works:

The lamp is controlled by infra-red (IR) radiation.

Infra-red radiation is emitted by the sun, remote controls and artificial light sources

such as incandescent and halogen lamps. By contrast, fluorescent lamps emit very

little IR radiation once they have reached their normal operation state. The light from

such lamps does not interfere the IR sensor which could make the lamps flicker or go

off.

In the case of sunlight, it can be assumed that the brightness of the visible light is

proportional to the intensity of the infra-red radiation. The two sensors on the lamp

(behind the red covers) detect the IR radiation in the vicinity of the lamp. A measure-

ment signal is derived from this, and this signal is then evaluated by the electronic

circuitry in the lamp:

After a maximum of 30 minutes the translucence of the luminaire is measured.

In the evening

bright

⇒ dark

Large amount of IR

⇒ Small amount of IR

Switch-on value is reached

The lamp switches itself on

Self-test each time power is applied.

A complete lamp test is performed. All the components of the lamp are checked for

correct operation. The lamp will light after about two seconds to indicate that the test

has been successfully completed.

Power is applied

Processor test

Evaluation of the sensors

If light

The lamp lights

after about 2 seconds

The lamp switches off after

6 to 8 seconds

If dark

The lamp lights

The light stays on

1.3.11 OSRAM DULUX® EL

LONGLIFE

SENSOR Plus

In the morning

dark

⇒ bright

Small amount of IR

⇒ Large amount of IR

Switch-off value is reached

The lamp switches itself off

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