Specifications

HYDROLOGICAL SERVICES
DL3 100-015 IMP
Issue 2: 15/11/2005
Rainfall (mm) Daily Accumulated Rainfall Chart
0900 0900 09002100 2100
0
25
50
Time (hours)
Trigger Alarm message
RAl1 = 25 mm
Rainfall Alarm 1 (Ral1)
Rainfall Alarm 1 is a simple threshold type alarm. Once conditions meet the alarm criterion for RAl1,
( Rainfall since 0900 greater than RAl1 value) the alarm sequence is generated sending the rainfall
message and the alarm condition is reset until 0900 the following day. The alarm condition can only
occur once within a 24 hour period between 0900 and 0900 unless the alarm threshold for RAl1 has
been re-defined by user command.
The rainfallalarm 1 can be individually disabled by entering RAL1= When the alarm is disabled the
alarm value is displayed as "--.-"
On-line Help
RAL1?
Rainfall Alarm 1: If the rainfall since 0:900 is> RAL1 then an alm
mesg is generated if alm checking is enabled
Syntax: RAL1<CR> Displays RAL1 threshold in inch
RAL1=1.00<CR> Sets RAL1 to 1.00"
RAL1=1.00"
Rainfall (inch)
2.0
1.0
0
Trigger Alarm message