Liebert Universal Monitor - Manual (Page 17)

Introduction
9
1.11 Typical Sequence
Figure 4 shows a typical sequence of how the Universal Monitor functions after detecting a change in
a monitored unit or area. Many responses depend on configuration settings. This example shows what
happens when an analog sensor input reaches a high setpoint—assuming the input is defined as
alarmable and is set up to trigger a response in an output—and when the condition returns to normal.
Figure 4 Example of typical sequence: Analog input reaches high setpoint
SENSOR_2 79.0 DEG
RETURN TO NORMAL
29-AUG-02
09:42:11
Entry in Alarm Log
Shows reading (
79.0 DEG
) &
condition (
RETURN TO NORMAL
)
SENSOR_2 80.0 DEG
HIGH SETPOINT ALARM
29-AUG-02
09:29:10
Entry in Alarm Log
Shows reading (
80.0 DEG
) &
condition (
HIGH SETPOINT ALARM
)
The alarm is cleared
(automatically if Unlatched; must be
cleared manually if Latched)
UNIVERSAL MONITOR 05-SEP-02 14:04:13 V5.100.0 PRESS =STATUS/SETUP
ESC ESC
The LCD stops flashing
When the alarm is cleared,
the fan shuts down
RETURN TO NORMAL
The temperature in the monitored
analog input returns to a normal
range (below the high setpoint).
The horn sounds (audible horn on
the controller board—silence horn by
pressing any key on the LCD keypad)
The LCD flashes
(except during setup)
Pager numbers are dialed
(up to four configured pagers)
Service number is dialed
(if configured)
A fan is turned on
(if the fan is connected to an output
set up to respond to this input)
ALARM CONDITION DETECTED
The temperature in a monitored
analog input reaches its high setpoint.
RESPONSES TO AN ALARM RETURN-TO-NORMAL SEQUENCE
UNIVERSAL MONITOR 05-SEP-02 14:04:13 V5.100.0 PRESS =STATUS/SETUP
ESC ESC
OUTPUT08 OFF
CONTACT CLOSED
05-MAY-02
09:42:12
OUTPUT08 ON
CONTACT OPEN
29-AUG-02
09:29:12
SENSOR_2 80.0 DEG
HIGH SETPOINT ALARM
Entry in Event Log
Fan output on
Entry in Event Log
Fan output off
Entry in Active Alarm Log
Pager numbers & service
number are dialed
Return-to-normal message sent
The horn stops sounding
(if user hasn’t silenced it)