Detcon SG1 - Manual (Page 12)

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While in the alarm 1 SET screen, press the Arrow key to select alarm 2. The icon will be
displayed and blink. Set alarm 2 using the same method for alarm 1. Pressing the Power
key while on the last digit will return to the alarm 1 SET screen.
10 secs count down
Press the Arrow key 2 times to save the selected values and exit the Alarm Set Mode. A
10 second countdown will initiate and at the end of the countdown, Gas Detection Mode
will be entered.
Method of Alarm Value Input
When setting the alarm values, the Arrow key is used to increase the value of the blinking
digit by one. Press the Power key to move to the next digit and use the Arrow key to change
its value if needed. Pressing the Power key while on the last digit will return to the alarm
1 SET screen.
Example) To change 1st Alarm Value from 19.5% to 19.0%
Hold 3 secs