BRT-330 is a ceiling mount occupancy sensor switch which utilizes passive infrared (PIR) sensor to detect the heat (in the form of infrared energy) from people moving within a space. It can determine when a space is occupied and turns on or turns off the loads automatically. It has an advanced micro controller unit and uses a proprietary signal processing technique to avoid false triggers.

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• Specification
• Installation
• Operation
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• ● Instant on and adjustable delay off time from 2 minutes to 60 minutes;
  ● Ambient light override. Automatically measures the ambient light level, and there is no trigger on when it is above a light level which can be set by the user;
  ● Easy installation onto the ceiling with or without a holder;
  ● Good for all kinds of loads;
  ● ABS-V0 flame resistance material; and
  ● High quality build.
  
• Fig. 1 and Fig. 2 show the front view and the back view of the BRT-330 PIR occupancy sensor switch respectively.
  
  
  
  
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• There are two ways to install BRT-330 PIR sensor switches to the ceiling. Fig. 4 and Fig. 5 show the step-by-step installation instructions, respectively.
   
  Cautions:
  Avoid mounting the sensor switch close to air vents, as the vibration and air flow can reduce the effectiveness of the sensor switch;
   
  1. Installation using a holder
  As shown in Fig. 4, a holder is attached to the ceiling using screws first. Then, the PIR sensor switch can be easily snapped into the holder.
   
  The holder is specially designed for BRT-330 sensor switch. Please talk to our sales representative when placing orders.
  
  
  
  2.  Installation without a holder
  As shown in Fig. 5, without a holder, an opening in the ceiling needs to be made first. There are four steps:
            Step one:      Open a hole of 68mm in diameter in the ceiling;
            (Attach the electrical wires as shown in the Wiring Diagram Fig. 3).
            Step two:     Open the two flexible clamps on the side surface of the sensor switch;
            Step three:    Insert the sensor switch into the hole; and
            Step four:     The clamps will hold the sensor switch onto the ceiling tight and steady.
  
  
  
  
• BRT-330 PIR sensor switch needs a warm-up time about two minutes before it can operate properly. It has dip switches to adjust the delay off time, and has a precision tuning screw to adjust the ambient light override threshold, as shown in Fib. 6.
  
  
  
  As shown in Fig. 7, please rotate the front cover counter-clockwise to remove it so that the dip switches and the fine tuning screw are exposed.
  
  
  
  1. Adjust the delay off time
  The 4 dip switches are used to set the delay off time to 8 settings based on different combinations. Fig. 8 shows all the dip switches are in “off” positions. Each combination corresponds to a delay off setting.
  
  
  
  2. Adjust the ambient light override threshold
  The fine tuning screw is used to set the ambient light override threshold. Use a screw driver to tune the screw gently.
   
  Caution:  The tuning screw can not make a full turn. To avoid possible damage to the screw, please do not use strong force to tune it.
  a. Counter-clockwise to “+”:  increase the threshold, so that the PIR triggers will be overridden in bright lighting condition; and
  b. Clockwise to “-”:  decrease the threshold, so that the PIR triggers will not be overridden in dark lighting condition.
• BRT-330 ceiling mount PIR occupancy sensor can be used for automatically turning on and/or turning off various loads such as lights, fans, appliances, or other kinds of electrical equipment.
   
  BRT-330 PIR occupancy sensor switch is perfect for saving energy and bringing convenience and safety to our daily life and work. It has wide applications at various locations such as stairwells, corridors, washrooms, offices, conference rooms in homes, schools, laboratories, hospitals, offices, etc., especially useful where AC power supply is not available.