MODERN PETROCHEMICAL PLANTS ARE ALWAYS AT THE RISK OF FIRE SINCE LOT OF  TOXIN INFLAMMABLE GASES ARE OFTEN PRESENT ALSO THE TEMPERATURE IS ALSO HIGH . THESE ARE NORMALLY UMS CLASS (UNMANNED MACHIONERY SPACE) SUPERVISORY ROOMS ARE ALWAYS AWAY FROM THE ACTUAL PLANTS. ALL LIGHT FIXURES ARE EXPLOSION PROOF. LITTLE SPARK CAN CAUSE GREAT FIRE. NORMAL FIRE SENSORS CAN NOT BE UTILISED THERE. SPECIALLY DESIGNED SENSORS ARE USED THERE TO SENCE SMOKE. IN CASE IF ANY SENSOR SENSES SMOKE

THE FOLLOWING ACTION WILL TAKE PLACE

IF THE RESET SW IS NOT PRESSED WITHIN 30 SECONDS THE PROJECTS TAKES FURTHER ACTION, IT DIALS OUT PRESTORED NUMBER AND DELIVERS AN EMERGENCY MESSAGE STORED IN SPEECH  IC. THE DIALING OUT CONTINEWS TILL A PERSON COMES AND PRESS THE RESET SW MAKING THIS SYSTEM FOOL PROOF. YOU CAN EVEN STORE YOUR MOBILE PHONE NUMBER. THIS PROJECT  IS  BASED ON 8051 MICROCONTROLLER.

OPERATION: CONNECT THE TELEPHONE LINE TO TEL IN CONNECTOR

THERE SHOULD BE 50V TO 54 VOLTS AT THE TEL CONNECTOR, CONFIRMS THE PROPER TELEPHONE CONNECTION. NOW PLUG IN THE POWER CONNECTOR TO 250V MAINS. ALL LEDS WILL BLINK.INDICATES STANDBY MODE. PRESS ON /OFF SWITCH (SW3) BLINKING WILL STOP AND PLANT ON RELAY WILL BE ON AND PLANT ON INDICATION WILL BE ON.2. PRESS SW1, OFF-HOOK RELAY WILL BECOME ON. THIS IS EQUILVALENT TO LIFTING THE HANDSET OF THE TELEPHONE. AND NOW YOU CAN STORE THE TELEPHONE NUMBER THROUGH THE DIALER KEY PAD. DIAL ANY NUMBER OTHER THAN THE LINE CONNECTED TO THIS DEVICE.IT CAN BE YOUR MOBILE NUMBER. YOU WILL RECEIVE THE BELL ON THE CALLED NUMBER. AFTER HEARING TWO THREE BELLS.PRESS SW1 AGAIN. THIS WILL STOP REINING.EQUIVALENT TO PUTTING THE RECEIVER BACK.NOW THE DEVICE IS READY TO MONITOR THE FIRE SENSORS. ONLY TWO SENSORS ARE PROVIDED WITH THE PROJECT. OUT PUT CAN BE CONNECTED TO ANY CHANNEL TO SHOW THE DEMONSTRATION. YOU CAN BLOW BLACK SMOKE THROUGH THE SENSORS USING AGGARBATTI OR CIGERATE BLOWING. SENSITIVITY OF THE SENSORS CAN BE ADJUSTED BY TURNING THE SCREW TO SLIGHTLY CLOCKWISE . FITTED INSIDE THE SMOKE SENSOR BOTTOM SIDE YOU WILL HAVE TO OPEN THE BOTTOM PLATE OF THE SENSOR TO DO THIS SAME WAY OVERSENSIVITY WILL CAUSE FALSE ALARM ,SO TURN IT SLIGHTLY ANTICLOCKWISE. HOWEVER WE ADJUST EVERY THING BEFORE SHIPMENT. SUPPOSE  YOU BLOW SMOKE THROUGH THE SMOKE SENSOR AND IT GET TRIGGERD YOU WILL HEAR  SIRON SOUND AND THE RESPECTIVE LED GLOWING AND EMERGENCY LED BLINKING.  IF THE RESET SW2 IS NOT PRESSED WITHIN THIRTY SECON. THE DEVICE WILL TAKE FURTHER ACTION  AFTER THIRTY SECOND THE PLANT RELAY WILL BE OFF AND SPRINKLE TLAY WILL BECOME ON THE DEVICE WILL DIAL UP THE TELEPHON  NUMBER AND EMERGENCY MESSAGE. THIS PROCESS OF DIALING AND REPETED MESSAGE WILL CONTINUE TILL YOU RESET THE RESET (SW2)