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Setting the Photocell (Photocell only affects the 'Live Out' output)
1.
If the lights are not already on, switch them on manually by pressing 'Utilities / LightSpot/MLS/LCM / IR Remote /
Luminaire+ / OK' on the QuickSet Pro. 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. This stage may be omitted if the
intention is to operate the detector's photocell in Passive Mode only [the detector must have already been
programmed to Passive Mode].
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'.
The detector takes a measurement, adds a small amount and stores the value in the Upper Threshold. Then it turns
the lights off, makes another measurement and stores the value in the Lower Threshold. 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 the contribution made by
the electric lighting; this is the perfect amount of hysteresis to ensure that the lights will not oscillate. The thresholds may
be read back and fine-tuned if necessary using the QuickSet Pro. Please note that the values are non-specific units i.e.
not lux.
Note: The light level perceived by the detector at the moment immediately prior to a Download operation is shown
momentarily on the QuickSet Pro screen following the Download; this is a useful mechanism for troubleshooting.
Active Mode
Passive Mode
Upper Threshold
Lower Threshold
Occupancy
Washroom Mode
The unit may be used in conjunction with a 230V solenoid valve and a trickle valve or 'petcock' to effect a urinal flush
system. Set the water flow rate by adjusting the petcock so that the cistern just fills within the chosen Off Delay period of
the detector. Note that in this mode, the photocell should be disabled, unless using the dual output unit.
Note: The MS1221PF/PSM and 230V solenoid valve can be ordered as a complete product, Ex-Or part nos.
UC1221PF/PSM.
Technical Data
OPERATING VOLTAGE: 230V 50Hz (UK & Europe)
RECOMMENDED CIRCUIT PROTECTION: 10 Amps
TERMINAL CAPACITY: 2 x 2.5mm
MAXIMUM LOAD: 6 Amps per output [not exceeding 10A in total]
MAXIMUM RECOMMENDED MOUNTING HEIGHT: 3 metres
RANGE: Cone-shaped detection
pattern, diameter (at floor level)
= 2.4 x mounting height
PHOTOCELL: Adjustable 50-5000 lux via Programmer
OFF DELAY 1 & 2: Adjustable via Programmer - factory pre-set to 20 mins
Each output is independently adjustable.
COLOUR: White RAL9010
MATERIAL: Flame retardant PC/ABS
WEIGHT: 210g (Flush version); 187g (Surface version)
IP RATING: 3X
Natural
Light
Duration of
Level
Off Delay
2
6.0m
Lights ON =
Lights OFF =
Note that when the natural light
level exceeds the 'upper threshold'
value, the lights do not immediately
turn off. They will turn off only when
the upper threshold has been
exceeded for the duration of the
programmed Off Delay.
Area Occupied =
Area Unoccupied =
Dimensions
62mm
deep
(behind ceiling)
2.5m
100mm
10mm deep
(Flange)
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