Detcon SG1 - Manual (Page 11)

When the 1st alarm occurs, the operator can acknowledge it by pressing the Power key. Only
the alarm sound stops. The LED will stay on until the reading drops below the alarm value.
When the 2nd alarm occurs, the operator and workers should promptly leave the work site.
The operator can acknowledge the alarm by pressing the Power key in a place where the
concentration value of the gas is normal. (The alarm alerts continuously when it does not
return to a normal state even if the Power key is pressed.)
When STEL / TWA alarm occurs, it is indicated with the value of the measured
concentration and activates the alarm with the same sound and vibration as that of the
2nd alarm.
When STEL / TWA alarm occurs, their respective icons can be deleted only by Power Off.
Primary battery alarm sounds repeatedly at 5 minute intervals only when one bar of the battery
icon remains.
Secondary battery alarm starts right before the end of power, and the power source finishes
after 10 seconds from the outbreak of alarm.
In the event of a test or calibration failure, the icon is displayed with an alarm sound.
Alarm Set Point
Gas O
2
CO H
2
S H
2
SO
2
1
st
19% 30 ppm 10 ppm 100 ppm 2 ppm
2
nd
23% 60 ppm 20 ppm 500 ppm 4 ppm
TWA N/A 30 ppm 10 ppm N/A 2 ppm
STEL N/A 200 ppm 15 ppm N/A 5 ppm
Alarm Set
To enter Alarm Set Mode, press the Arrow key for 3 seconds while the unit is powered off.
SET will be displayed and the
icon will blink. Press the Power key to enter the alarm 1
value. Use the Arrow key to change the value and the Power key to move to the next
digit. Pressing the Power key while on the last digit will return to the alarm 1 SET screen.
Hold 3 secs
10