Specifications

HYDROLOGICAL SERVICES
DL3 100-019 IMP
Issue 2: 15/11/2005
4.1.3 Battery Voltage (BV)
The RRDL-3 logger battery voltage is measured and displayed when the battery voltage command
(BV) is executed as well as during a status window command (ST), a rain message (R), a river
message (RV), and when any alarm occurs that generates a rain or river message.
On-line Help
BV?
Battery Voltage: Reads logger supply voltage to one decimal point
Syntax: BV<CR>
4.1.4 Bye (BYE)
The RRDL-3 logger has two distinct modes of operation. When the logger is ‘awake’ it consumes
approximately 75mA and responds to external commands and events instantly. When the logger is
‘asleep’ it consumes approximately 200uA and is awaiting to be woken up by one of several external
events :- a TBRG bucket tip, a river quadrature input change, reception of serialdata, a carrier detect
change of state, a timer wakeup from the real time clock. Note that when the logger is woken up by
serial data, the character that wakes up the logger is lost! Therefore a character such as Carriage
Return should be used to wake up the logger before a command is sent. The logger will then stay
awake until it receives a BYE command or the programmed Go to Sleep time of 1 or 5 minutes is
exceeded. When the logger is woken by one of the other external events it performs appropriate
action and then goes back to sleep to conserve power.
The BYE command is used to force the logger to go to sleep to conserve battery power as well as
break command access so the password must be entered to action a parameter change next time the
logger is woken.
On-line Help
BYE?
Bye: Forces logger to go to sleep & breaks command access
4.1.5 Call/Clear Sequence/Numbers (CLEARx, CALLx, CNx)
These programmable dialogues are used to control an external modem. The clear sequence gets the
modem into a known state and the call sequence initiates a callthrough the modem. Both the calland
clear sequences send commands to the modem and wait for a response. The call and clear sequence
is performed if an alarm occurs or if a scheduled send command is programmed. The following
sequence of events will occur:-
1. An rain or river message is constructed and saved.
2. A CLEAR sequence is performed to get the modem into a known state.
3. A CALL sequence is performed to cause the modem to dial a phone number. (If "N" appears
in the CALL sequence then a CALL NUMBER is substituted)
4. After a successful connection the previously constructed Rain or River message is
transmitted. Unsuccessful connection will cause a 60 sec timeout and then return to step 2.
(This will reoccur depending on the value of RETRY)