D7BCT datasheet(46/54 Pages) OSRAM

46 / 54 page

OSRAM DULUX® EL – electronic energy saving lamps

Economical alternatives to ordinary light bulbs

Technical Guide

3.10 Additional

information on

OSRAM DULUX® EL

SENSOR Plus

1. Why doesn’t the lamp come on immediately in a darkened room?

• IR (= infra red) radiation from the sun may still be getting into the room

• There is an IR source in the room (such as a light bulb switched on)

• Depending on the IR level it may take up to 45 seconds for the lamp to switch on

2. Can I have several lamps in one luminaire or in neighbouring luminaires?

• Yes, provided the sensors are not pointing directly at the other lamps.

3. How can I test a lamp in a luminaire?

• You can do this by simply applying mains voltage (see Self-test)

• Further testing can only be carried out at considerable cost. Covering the sensors

may cause the lamp to go out after 45 seconds. If the sensors are then uncovered

again the lamp will switch on again only after a lengthy period of time and will

switch off as the ambient brightness increases.

4. In one luminaire the lamp switches on too early in the evening.

• Cause:

The luminaire or lamp is pointing east-north-east. In the evening very

little light (and therefore IR radiation) falls on the lamp.

• Remedy:

Change the position of the luminaire, change the shade over the

luminaire, turn the sensor towards the source of light.

5. In one luminaire the lamp switches on too late in the morning.

• Cause:

The luminaire or lamp is pointing west-north-west. In the morning very

little light (and therefore IR radiation) falls on the lamp. The problem may

rest with the design of the luminaire – the sensors may not be „seeing“

and IR radiation.

• Remedy:

Change the position of the luminaire, change the shade over the

luminaire, turn the sensor towards the source of light.

6. The lamp flashes at night in the luminaire.

• Cause:

An external light source (IR) is interfering with the normal operation of

the lamp or the luminaire cover is the problem.

• Remedy:

Change the luminaire cover, turn the sensors towards daylight (IR).

As an OSRAM DULUX IC is used to control the lamp, the life of the lamp will not be

significantly affected by frequent on/off switching.

3. Lamp data and lamp properties

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