Sealey SCMA1 - Manual (Page 4)

NOTE: To stop the alarm refer to 7.4.
7.7. Memory Function
7.7.1. When no one is home, the unit may detect CO and the alarm sound. The alarm stops when the CO condition returns to normal. The
highest CO concentration that was present, will be recorded and shown on the LCD with the “CO figure” flickering once every 15
seconds, together with 2 continuous “DI” “DI” sounds, red LED and the “SPEAKER” symbol flashing, see fig.6.
7.7.2. Press the TEST button the “CO figure” will be cleared and the unit returns to normal working condition, see fig.3.
7.8.
Low battery Signal
7.8.1. When the unit detects the battery voltage is low and needs replacing, the red LED will beep every 40 seconds along with one BEEP. The
LCD will show the LOW VOLTAGE symbol, see fig.7.
7.8.2. The red LED will flash as usual, during the low battery period, the unit can still alarm as usual.
NOTE: The normal stand by time of battery is 5 years minimum. If there is a problem with the battery or low battery signal warning
keeps activating for over 30 days, replace the battery.
7.9. Manual Zero
7.9.1. In normal operation with no CO gas present, when the LCD does not show “0 PPM”, you can press the TEST button down for 3 seconds
until the PPM character on the LCD disappears, then release the TEST button until the LCD shows “0 PPM”.
7.9.2. manual Zero can only be carried out under the following two conditions:
A: the co concentration on the lcd is lower than 10 PPm.
B: The first digit of the LCD shows “-”.
7.10. Fault Signal Warning
7.10.1. The unit will self-test the amplifying circuit and sensor every 10 seconds. When there is a problem with the amplifying circuit or sensor,
the unit will beep every 30 seconds along with flashing of yellow LED, the LCD will show “---”, see fig.7.
7.11. End of Alarm Life Warning
7.11.1. When the alarm is at the end of its life, it gives three “DI” audible alarms every 60 seconds together with a LED visual alarm, see fig.8.
7.12. Calibration
7.12.1. calibration can only be carried out by a professional organisation, please do not calibrate it yourself.
7.12.2. calibration is carried out on a gas concentration of 400 PPm, this will not affect the unit’s accuracy, every unit has been calibrated
before delivery.
fig.6
fig.7 fig.8
Flashes every 40
seconds
Flashes every 30
seconds
Flashes every 60
seconds
SCMA1 Issue: 1 - 30/05/14
Original Language Version © Jack Sealey Limited