AMC 1ACOs, Instructions Manual, Page: 19 / 33

AMC-1ACOs One Channel CO Monitor with DSI
15
5 OPERATION AND CALIBRATION
5.1 OPERATION
5.1.1 DIP SWITCH PROGRAMMING
The 1A circuit board has two blocks of DlP-switches, located under the DSI Board, for
configuring the various functions of the 1A; see Figure 2, item 12. Each DIP-switch can be set
to OFF (left position) or ON (right position) depending on functions required.
Positions shown in
Bold
are typical settings for the AMC-1ACOs.
CAUTION
TURN OFF THE MAIN POWER SUPPLY BEFORE REMOVING THE DSI BOARD TO MODFIY DIP
SWITCHES.
TABLE 2: DIP-switch programming chart
Switch Feature Position Description
OFF
Warning and alarm relays are automatically de-activated
once activating condition has been removed and
minimum run timer has expired. SW1-1 Activate
Alarms until
Acknowledge
(Latching
Relays)
ON Once activated, warning and alarm relays remain
activated (latched) until activation condition has been
removed, minimum run timer has expired and the
Acknowledge button has been pressed.
SW1-2,
SW2-2
Minimum Run
Timer See
Description
Warning and alarm relays are maintained in alarm state
for a minimum time interval following alarm activation, as
follows:
SW1-2 SW2-2 Minimum Run Time
OFF OFF
0 minutes
ON OFF 5 minutes
OFF ON 10 minutes
ON ON 30 minutes
Note that a sensor level falling below the alarm threshold
and then re-occurring during this time resets the alarm
timer for the associated alarm.
SW1-3,
SW1-4
Sensor Type
(Mode
Select) See
Description
Sensor type (threshold mode) is selected as follows:
SW1-3 SW1-4 Sensor Type (Mode)
OFF OFF
Both channels Increasing
ON OFF Both channels Decreasing
OFF ON Channel 1 Decreasing
Channel 2 Increasing
ON ON Reserved
SW1-6 Number of OFF Channel 1 and 2 are enabled.