SyxthSense Ltd
Online Store:
www.syxthsense.com
Copyright
©
2005 SyxthSense Ltd – 01/2005
Enquiries: T:
0870 20 80 100
F:
0870 20 80 200
PS
GS7.05
– 2/2
Operation
Carbon monoxide (CO) is a gas whose high toxicity (it can have severe consequences even when
inhaled in very small quantities) is added to an extreme danger because it is not perceptible by people
being colorless and odorless.
The RGI CO0 L42 (Fig. 1) detector is a microprocessor based electronic device that answers all needs
of safety in those cases in which there can be CO production (e.g. where heating or cooking appliances
can have uneven combustions).
Optical and acoustic indications are pre-set on two different alarm thresholds:
1° THRESHOLD (Pre-alarm) = red LED blinks and the
relay 1 ON
(as an example to turn on a light
indicator) for CO > 16 ppm (20mg/m³) concentration.
2° THRESHOLD (Main-alarm) = red LED, buzzer and
both relay ON
for CO > 80ppm (100mg/m³)
concentration. The second relay is used for closing a gas distribution valve, possible CO generation
source and/or turn on a fan to ventilate the room.
In case of alarm (2° threshold), the relays and buzzer work until the test/alarm-reset button is
depressed, even if CO concentration returns below the alarm threshold
.
The RGI CO0 L42 detector is equipped with a delay line which avoids the intervention of the alarm
system (in order for the electrochemical cell sensor to heat up) whenever the device is turned on or
even, after a mains blackout, when the power comes back.
During this time delay (about 1 minute), the yellow LED is blinking and, at the end, is turned off in order
to indicate the 'active' state for the detector itself. During normal operation the detector samples the CO
concentration every 15 seconds.
The RGI CO0 L42 detector also features an auto diagnostic system for checking the sensor good
conditions. When the yellow indicator is turned on (sensor fail), the possible causes must be searched
among the following:
- sensor fail;
- sensor disconnected;
- detector malfunctioning.
A functional test of the overall detector system can be executed pressing the test button: the alarm
condition is entered for a few seconds allowing the test of the red led, the buzzer and the relays.
The RGI CO0 L42 features two extremely innovative functions:
- it’s equipped with a calculation function which after 3 years of operation warns the user to replace the
sensor. This alarm is shown through the alternative blinking of the yellow and red led, as well as the
closing of the contacts of each relays;
- the replacement of the sensor can be done from the user, in fact the sensor is lodged in a replaceable
module which include the calibration electronics.
WARNING
:
in case of CO detection alarm:
1) Ventilate immediately the room opening doors and windows.
2) Turn off any functioning combustion device.
3) Search and remove the possible cause of alarm.
4) In case the cause of the alarm is not immediately removed, vacate the room and call a qualified
technician.
