Timeguard NSLB90 User Manual

Page 6

Designed in the U.K. 67-058-358 (Iss. 2)

Timeguard Limited.

Victory Park, 400 Edgware Road,

London NW2 6ND

Sales Office: 020 8452 1112

4. Operation and Testing

SETTING UP FOR AUTOMATIC OPERATION
The adjustment controls on the underside of the unit

(diagram B) should be set as follows.

The TIME control determines how long the lamp remains

illuminated after activation. The minimum time (fully

anti-clockwise) is approx. 1 hour, whilst the maximum time

(fully clockwise) is approx. 12 hours. Set the control to the

desired setting between these limits.

The DUSK (LUX) control determines the level of darkness

required for the unit to start operating.

Wait until the ambient light level reaches the level at which

you like the light to turn on. Set the DUSK control knob fully

anti-clockwise then move the DUSK control a small step at

a time clockwise pausing for some time between steps until

the light turns on. Leave the control set at this point.
At this position, the unit should become operative at

approximately the same level of darkness each evening.

Observe the operation of the unit. If the unit is starting to

operate too early (ie. when it is quite light), adjust the control

slightly anti-clockwise. If the unit starts to operate too late

(ie. only when it is very dark), adjust the control slightly

clockwise. Continue to adjust until the unit operates as desired.