Specifications

HYDROLOGICAL SERVICES
DL3 100-034 IMP
Issue 2: 15/11/2005
4.1.13.4 The River Height Message (RV)
The following data format represents the standard river height message as generated under alarm
conditions, message schedule, or by command request.
ZCZC HYDH MELB 0567890 HS0001 09:35 01/05/92 24.00 -4.72/30 31.73 22:15 15/02/92
13.6 22.95 32.78 9.83/02:30/18.03 000 019 115 567 NNNN<crlf >
Note: Message terminates with <crlf>, carriage return, line feed marker.
Par. Parameter Definition Sample
SoM Start of Message marker, fixed field. ZCZC
MsgID Message Identifier for a river height message, fixed field. HYDH
Site Site Name, variable length, ( maximum of 16 characters, user
programmable).
MELB
RvChID River Channel Identification number or Observational Station Number,
(7 digits, user programmable).
0567890
LogID Logger Identification number as hard coded by manufacturer, (6 digits). HS0001
Time Time,(Hour:Minute format).[can be local or UTC] 09:35
Date Date,(Month,Day,Year format).[can be local or UTC] 05/01/92
RvH Present River Height (feet). 24.00
RvHt River Height trend, change in river height per time interval,
(feet/minutes).
-4.72/30 - fall in river height of
4.72 feet over the last 30
minutes.
RvMax Last River Height Max over last 24 hours, (feet). 31.73
RvMaxT Time of last River Height max, (Hour:minute format). 22:15
RvMaxD Date of last River Height max, (Month/Day/Year format). 02/15/92
BV Battery Voltage, (volts). 13.6 v
RvAl1 River Alarm1, river height threshold, (feet, user programmable). 22.95 - If RvH > 22.95
then
Alarm1.
RvAl2 River Alarm2, second river height threshold, (feet, user programmable). 32.78 - If RvH > 32.78
then
Alarm2.
RvAl3 River Alarm3, absolute change in river height over a fixed time interval
and only tested above a defined threshold, (feet/Hr:Min/feet, user
programmable).
9.83/02:30/05.50 - If RvH over
the last 2hr & 30min has
changed by > 9.83
providing
RvH 18.03
then Alarm3.
RvAlS River Alarm Status, indicator group to identify alarm condition. An
individual alarm is represented by its position within the indicator
group, (three,two,one = 000).
000 = no alarms active.
001 = rainfall Alarm1 active.
011 = Alarm1 & Alarm2 active.
MN Message Number incremental message counter, (roll over at 999 then
001).
019
CC Character Count, total number of characters in the data line excluding <
crlf >, SoM and EoM.
115
CS Check Sum, last three digits of the sum of all ASCII characters in the
data line excluding < crlf >, SoM and EoM
567
EoM End of Message marker, fixed field. NNNN