Introduction

1.11Typical 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

RESPONSES TO AN ALARM

ALARM CONDITION DETECTED The temperature in a monitored analog input reaches its high setpoint.

The horn sounds (audible horn on the controller board—silence horn by pressing any key on the LCD keypad)

RETURN-TO-NORMAL SEQUENCE

RETURN TO NORMAL

The temperature in the monitored analog input returns to a normal range (below the high setpoint).

The alarm is cleared (automatically if Unlatched; must be cleared manually if Latched)

The horn stops sounding

(if user hasn’t silenced it)

ESC

SENSOR_2

80.0

DEG

HIGH

SETPOINT

ALARM

29-AUG-02

09:29:10

 

 

 

 

 

 

SENSOR_2

80.0

DEG

HIGH

SETPOINT

ALARM

 

 

 

 

 

OUTPUT08 ON

CONTACT OPEN

29-AUG-02 09:29:12

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)

Entry in Alarm Log

Shows reading (80.0 DEG) & condition (HIGH SETPOINT ALARM)

Entry in Active Alarm Log

Entry in Event Log

Fan output on

The LCD stops flashing

ESC

Pager numbers & service number are dialed

Return-to-normal message sent

When the alarm is cleared, the fan shuts down

 

 

Entry in Alarm Log

SENSOR_2 79.0

DEG

29-AUG-02 09:42:11

Shows reading (79.0 DEG) &

RETURN TO NORMAL

 

 

 

 

condition (RETURN TO NORMAL)

 

 

 

Entry in Event Log

OUTPUT08 OFF

05-MAY-02 09:42:12

Fan output off

CONTACT CLOSED

 

 

 

9

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Image 17
Liebert Universal Monitor user manual Typical Sequence