Macurco CD-6B Manual (Rev-1.0) Eng
REV – 1.0 [34-2900-0510-2 ] 13 | Page
NOTE: The Awareness Alarm has the lowest alarm priority.
4.3 Alarm 1 Relay
• To set the Alarm 1 Relay set point, use the “A1S” setting in the Configuration menu. The selectable values
are “diS”, 0.25, 0.50 (default), 1.00, 1.50, 2.00, 2.50, 3.00, 3.50, 4.00, 4.50, 5.00.
• The Alarm 1 Relay can be triggered by an instantaneous reading or a time weighted average. This can be
selected via the “A1t” setting in the Configuration menu. The time weighted average uses readings over the
previous 8-hour period to calculate the average. The default setting is “On”.
• The Alarm 1 Relay can be configured to nO or nC. Default is nO. This can be changed via the “A1c” setting in
the Configuration menu.
• To set the Alarm 1 latching behavior, use the “A1L” setting in the Configuration menu. Default is non-
latching “OFF”.
• If the “tFS” setting is “On” the Alarm 1 Relay will engage during a trouble condition. The default setting is
“OFF”. The “tFS” setting can be changed in the Configuration menu.
• Electrical Ratings: SPST to switch 2 A load, up to 240 VAC or 30 VDC
4.4 Alarm 2 Relay
• To set the Alarm 2 Relay set point, use the “A2S” setting in the Configuration menu. The selectable values
are “diS”, 0.25, 0.50, 1.00, 1.50 (default), 2.00, 2.50, 3.00, 3.50, 4.00, 4.50, 5.00.
• The Alarm 2 Relay can be configured to nO or nC. Default is nO. This can be changed via the “A2c” setting in
the Configuration menu.
• To set the Alarm 2 latching behavior, use the “A2L” setting in the Configuration menu. Default is non-
latching “OFF”.
• The Alarm 2 relay responds to instantaneous gas reading only (no time weighted average option).
• Electrical Ratings: SPST to switch 2 A load, up to 240 VAC or 30 VDC
4.5 Alarm 3 Relay
• To set the Alarm 3 Relay set point, use the “A3S” setting in the Configuration menu. The selectable values
are “diS”, 0.25, 0.50, 1.00, 1.50, 2.00, 2.50, 3.00 (default), 3.50, 4.00, 4.50, 5.00.
• To set the Alarm 3 latching behavior, use the “A3L” setting in the Configuration menu. Default is latching
“ON”.
• The Alarm 3 Relay can be wired to nO or nC. This can only be changed by wiring.
• The Alarm 3 Relay responds to instantaneous gas reading only (no time weighted average option).
• Electrical Ratings: SPDT to switch 2 A load, up to 240 VAC or 30 VDC
4.6 Alarm Behavior
4.6.1 Alarm Priority
From lowest to highest, the alarm priority is as follows: Awareness Alarm, Alarm 1, Alarm 2, Alarm 3, Trouble Fault.
For example, the trouble condition has the highest priority. Therefore, when there is an occurrence of an alarm and
a trouble condition at the same time, the unit behavior (buzzer, display and power LED) will follow the trouble
condition.
4.6.2 Display turned “On”
With the display function turned “On”,
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