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RI 8544 |
| Nominal Voltage 50/60 Hz |
120/208/240/277 |
Voltage Range |
105-305
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| Fail Mode |
On
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| Load Rating |
1000 Watt Tungsten / 1800 VA Ballast
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| Operating Temperature |
-40C to +70C (-40F to +158F)
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| Photocell |
Encapsulated Silicon Phototransistor |
| Dielectric Strength |
5000 Volts between current carrying parts and metal surfaces
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| Surge Protection |
320 Joule MOV / 10,000 amp surge current
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| Power Consumption |
0.5 watts @ 120 V
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| Time Delay Off (Instant On) |
3 to 5 seconds
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| Operating Light Levels (Standard Settings) |
Turn On 1.5 FC ± .25 / Turn Off by 0.9 FC
(Off:On Ratio = 0.6:1)
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| ANSI Color Coded Cover |
Blue (Standard)
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| ANSI Color Coded Cap Options |
Option Code 1 (Add to end of Model Number) |
| Green |
-GN |
| Black |
-BK |
| Brown |
-BN |
| Orange |
-ORN |
| Operating Light Levels Option |
Option Code 2 (Add to end of Model Number, after Option Code 1) |
| Denotes Turn On, and Turn Off point in FC |
Specify Turn On point - Specify Turn Off point in FC |
* Before Ripley's introduction of the Inverse Ratio photocontrol, accurate True Inverse Ratio Control was an elusive goal in the lighting control industry. The premise of Inverse Ratio Control is to reduce burn-time and energy consumption by allowing lights to be turned off at a lower light level setting than the light level setting utilized to turn them on. However, with a Turn OFF setting lower than the Turn ON setting, a typical photocontrol would (short-cycle) turn the lights on a the Turn ON value and turn them back off as soon as the light level dropped below the (lower) Turn OFF setting.
Various methods of circumventing the (short-cycle) problem have been incorporated into competitive units, but they rely on inaccurate, fixed time-delayed schemes. In order to achieve true consistency and true accuracy, and provide a True Inverse Ratio Control, Ripley's microcontroller technology continuously samples and monitors conditions to optimize the photocontrol's performance.
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