ii) The Primary Interest is the Switching Control Output
With the photocell configured as ACTIVE or PASSIVE:-
1) If the lights are not already on, switch them on manually by pressing ‘UTILITIES /
LIGHTSPOT/MLS/LCM / IR REMOTE / HC5 / Lu/OK’ (QuickSet Pro) or "+" (HC5A).
Fluorescent lights do not reach full output until up to 15 minutes after being switched on, so ensure that
the lights are fully warmed up before continuing.
2) Wait until the time of day when the natural light level is at the point below which you
would
want the lights
to be on, and above which you
would not
want the lights to be on.
3) Start the internal self-programming mechanism by pressing ‘UTILITIES / LIGHTSPOT/MLS/LCM / SET
LIGHT LEVEL/OK’ (QuickSet Pro) or Scene 1 (HC5A). The detector takes a photocell reading, adds a
small amount and stores the value in SET-POINT HIGH. Then it turns the lights off, makes another
measurement and stores the value in SET-POINT LOW. The lights now switch on again to acknowledge
a successful programming operation.
The two switching thresholds have now been set, and the difference between them is equal to slightly more
than the contribution made by the electric lighting. This is the perfect amount of hysteresis to ensure that the
lights will not oscillate.
OneSwitch
OneSwitch Dimming affords local control to the end-user whereby a simple, momentary, push-to-make wall
switch can be used to raise or lower the lighting level or toggle the output of the unit ON or OFF. A short press
(less than 1 second) toggles all outputs from
both
OFF to
both
ON or from
either
ON to
both
OFF. A long press
will ramp the digital output either up or down with no effect on the volt-free output. If the output prior to pressing
the switch is above 90% the output will ramp down; if below 90% it will ramp up. If the latest press and the
current press are within 5 seconds of each other it will ramp in the opposite direction.
6
User Overrides
The end-user can configure a number of lighting scenes that can be recalled using a hand-held override.
With an HC5A hand-held controller lighting can be overridden OFF or ON, or a set level can be chosen,
affecting either the controlled group or, with an MLS system, the whole zone. Regulating and switched loads
can be adjusted independently through a combination of OneSwitch Dimming and the HC5A.
