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Figure 1: Indoor Ambient Lighting Intensities (Measured in Lux)
Primex Eco Clock Operation
The Primex Eco Clock can be installed anywhere indoors within range of the Primex Wireless 72MHz transmitter as long as
lighting is adequate. Under adequate lighting levels (220 lux or above), the clock's photovoltaic cells, as shown in Figure
2, collect and store light energy to power the clock. When the Primex Eco Clock is started, the radio in the clock receives a
synchronization signal and sets the time automatically. When operating under optimal lighting, the Primex Eco Clock
synchronizes time once per day, at 10:01, 2:01 or 6:01 a.m. and p.m. and optically aligns its hands, if needed, daily at
midnight. With adequate light (above 150 lux), the second hand will operate normally with single-second stepped motion
(Model 14149 only).
Primex Wireless
4
XR Series Eco Clock Installation Guide
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