Ampac Orbis, Product Manual, Page: 8 / 22

6
MAN1509-4
ORBIS AUSTRALIAN PRODUCT GUIDE
5.4 Technical Data
All is supplied subject to change without notice.
Specifications are given at 23°C and 50% relative humidity unless otherwise stated.
DETECTOR OPERATING PRINCIPLES
Principle of detection: Photo-electric detection of light scattered by smoke particles over a wide
range of angles.
The optical arrangement comprises an infra-red emitter with a prism and a photo-diode at 90° to the
light beam with a wide field of view. The detector’s microprocessor uses algorithms to process the
sensor readings.
Sampling frequency: Once every 4 seconds
ELECTRICAL
Supply voltage: 8.5
—33V DC
Supply wiring: 2 wires, polarity sensitive
Power-up time: <20 seconds
Minimum ‘detector active’ voltage:
6V
Switch-on surge current at 24V:
120μA
Average quiescent current at 24V:
107μA
Alarm current @ 12V: 20mA
Alarm current @ 24V: 40mA
Alarm load:
600Ω
Holding voltage: 5
–33V
Minimum holding current: 8mA
Minimum voltage to light alarm LED: 5V
Alarm reset voltage: <1V
Alarm reset time: 1 Second
Remote output (
–R) characteristic: 1.2kΩ
supply
MECHANICAL
Material: Detector and base moulded in white polycarbonate.
Alarm Indicator: Integral indicator with 360° visibility (See Table 1 for details of flash rate)
Dimensions and weight of detector: 100mm diameter x 42mm height, 75g
Dimensions and weight of detector in base: 100mm diameter x 50mm height, 135g
Environmental: Operating and storage temperature
–40°C to +70°C (no condensation or icing)
Humidity: 0% to 98% relative humidity (no condensation)
Wind speed: Unaffected by wind
Atmospheric pressure: Insensitive to pressure
IP rating to EN 60529: 1992*: 23D
Electromagnetic Compatibility: The detector meets the requirements of BS EN 50 081-1 for
emissions and BS EN50 130-4 for susceptibility.
*The IP rating is not a requirement of EN 54 since smoke detectors have to be open in order to
function. An IP rating is therefore not as significant as with other electrical products.