Oxigraf O2iM NEMA 4X Oxygen Analyzer
February 13, 2007 08-0427-B0, Manual, O2iM.doc Page 11
Relay Normal Mode Channel Relay Mode
Horn/Strobe
On when limit and warning conditions specified by the Horn/Strobe setup
are true.
System OK
On when self test is good and
absorption line lock achieved.
On when a channel 1 alarm state is
active
Warning
On when warning status is active
for low supply voltage, low sample
flow, high pump drive, high or low
cell pressure, or absorption over
range.
On when a channel 2 alarm state is
active
Limit A
On when O2 is greater than High
Threshold A or lower than Low
Threshold A. Disabled when both
limit values set to zero.
On when a channel 3 alarm state is
active
Limit B
On when O2 is greater than High
Threshold B or lower than Low
Threshold B. Disabled when both
limit values set to zero.
On when a channel 4 alarm state is
active
3.1.7 Alarm Relay
The ALARM relay is activated by a programmable combination of LIMIT 1, LIMIT 2, and
WARNING conditions. The alarm relay can be programmed to pulse every 5 seconds if an alarm
condition is caused by a warning (low flow, system not OK, etc). Limit conditions result in
continuous alarm relay activation, if enabled. An active alarm is muted for a programmable time
delay by pressing any key. The limit detector latches, if enabled, will also be reset for the alarm-
acknowledge time duration when a key is pressed. See section 5.24 for more details.
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