Detcon DM-600IS - Manual (Page 32)

DM-600IS
DM-600IS Instruction Manual Rev 1.5.9 Page 28 of 37
11.0 PROGRAMMING ALARMS
11.1 Alarm Levels
Both alarm 1 and alarm 2 levels are factory set prior to shipment. Alarm 1 is set at 20% of range and alarm 2 at
40% of range. Both alarms can be set in 1% increments from 10% to 90% of range. The following procedure is
used to change alarm set points:
a) First, enter the programming menu by holding the programming magnet stationary over “PGM 2” for
30 seconds until the display reads “VIEW PROG STATUS”, then withdraw the magnet. At this point
you can scroll through the programming menu by momentarily waving the programming magnet over
“PGM 1” or “PGM 2”. The menu options are: View Program Status, Set Alarm 1 Level, Set Alarm 2
Level, and Set Cal Level.
b) ALARM 1 LEVEL From the programming menu scroll to the alarm 1 level listing. The menu item
appears as: “SET ALARM 1 LEVEL”. Enter the menu by holding the programming magnet
stationary over “PGM 1” for 3 seconds until the display reads “SET ALM1 @ ##PPM”, then
withdraw the magnet. Use the programming magnet to make an adjustment to “PGM 1” to increase or
“PGM 2” to decrease the display reading until the reading is equal to the desired alarm set point. Exit
to the programming menu by holding the programming magnet over “PGM1” for 3 seconds, or
automatically return to the programming menu in 30 seconds.
c) ALARM 2 LEVEL From the programming menu scroll to the alarm 2 level listing. The menu item
appears as: “SET ALARM 2 LEVEL”. Enter the menu by holding the programming magnet
stationary over “PGM 1” for 3 seconds until the display reads “SET ALM2 @ ##PPM”, then
withdraw the magnet. Use the programming magnet to make an adjustment to “PGM 1” to increase or
“PGM 2” to decrease the display reading until the reading is equal to the desired alarm set point. Exit
to the programming menu by holding the programming magnet over “PGM1” for 3 seconds, or
automatically return to the programming menu in 30 seconds.
d) Exit back to normal operations by holding the programming magnet over “PGM 2” for 3 seconds, or
automatically return to normal operation in 30 seconds.
11.2 Alarm Reset
An alarm condition will cause the applicable alarm to activate its corresponding relay and LED. If alarm 1,
alarm 2, or fault alarms have been programmed for latching relays, an alarm reset function must be activated to
reset the alarms after an alarm condition has cleared. To reset the alarms, simply wave the programming
magnet over either “PGM 1” or “PGM 2”, momentarily, while in normal operations mode and note that the
corresponding alarm LED(s) turn off.
11.3 Other Alarm Functions
Alarms are factory programmed to be non-latching, de-energized; and to fire under ascending gas conditions.
The fault alarm relay is programmed as normally energized which is useful for detecting a 24VDC power
source failure. All alarm functions are programmable via jumper tabs. Changing alarm functions requires the
sensor housing to be opened, thus declassification of the area is required. See section 5.4 for details.