Dataplex DPX-213 Spezifikationen PDF herunterladen (Seite 18)

HYDROLOGICAL SERVICES

DL3 100-018 IMP

Issue 2: 15/11/2005

River Height

Time

Interval

change

in RvH

threshold

RvAl3 = change in River Height / Interval /above threshold

= alarm event satisfied

Note: RvAl3 may occur as the river is falling since the alarm criteria is for absolute change.

Hydrograph

River Alarm 3 (RvAl3)

River Alarm 3 is a rate of change alarm. Alarm checking for RvAl3 will commence once the river

rises above a user defined threshold. Above this threshold an absolute change in river height over a

defined time interval as specified by RvAl3 interval parameter, will trigger an RvAl3 event. Alarm

checking for an RvAl3 condition is then disabled for a period of time equivalent to half the interval

parameter of RvAl3 (interval/2). Alarm checking then recommences immediately after this interval

or if RvAl3 parameters have been re-defined by user command.

River alarm 3 can be individually disabled by entering RVAL3= When the alarm is disabled the

alarm value is displayed as "--.--/--:--/--.--"

On-line Help

RVAL3?

River Alarm 3:If the river changes at a rate > RVAL3 then an alm

mesg is generated, if the river is above user

defined threshold and alm checking is en

yntax: RVAL3<CR> Displays RVAL3 value in feet per time

interval (Hr:min) + the river threshold in metres

RVAL3=003.00/02:30/005.50<CR> Sets parameter to a height change of

3 over the last 2.5 hrs if the river height is > 5.5

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 50 51

Keine Kommentare

Dataplex DPX-213 Spezifikationen Seite 18