Emerson Liqui-tect MC68HC16Z1 - Manual (Page 7)

Introduction
3
1.3 Typical Sequence
Figure 3 shows a typical sequence of how the Liqui-tect Monitoring System functions after detecting
a leak, contamination or cable break in either Zone 1 or Zone 2. Responses depend on configuration
settings. This example shows what happens when a leak is detected.
Figure 3 Example of typical sequence: Analog input reaches high setpoint
LIQUI-TECT PANEL
05-SEP-02 14:04:13 V5.100.0 PRESS =STATUS/SETUP
ESC ESC
Entry in Alarm History Log
(if alarms defined as Latched)
ZONE 1
LEAK @ 3495ft
29-AUG-03 09:29:10
Entry in Alarm History Log
The alarm is cleared
(automatically if Unlatched; must be
cleared manually if Latched)
The LCD stops flashing
RETURN TO NORMAL
The leak is controlled.
The horn sounds (audible horn on
the controller board—silence horn by
pressing any key on the LCD keypad)
The LCD flashes
ALARM CONDITION DETECTED
A leak is sensed along the cable
defining Zone 1.
RESPONSES TO AN ALARM RETURN-TO-NORMAL SEQUENCE
Entry in Zone Trend Log
(if alarms defined as Unlatched)
The horn stops sounding
(if user hasn’t silenced it)
ZONE 1
ALARM RESET - LCD
29-AUG-03 09:42:11
ZONE 1
NO LEAK
29-AUG-03 09:42:11
LIQUI-TECT PANEL
05-SEP-02 14:04:13 V5.100.0 PRESS =STATUS/SETUP
ESC ESC