Specifications

HYDROLOGICAL SERVICES
DL3 100-043 IMP
Issue 2: 15/11/2005
6. Fault Finding
This fault finding guide should be used by the RRDL-3 user before they consult the manufacturer
to assist with specific problems.
No response on power up (LED does not flash).
Remove and check the voltage of each AA cell battery. (should be 1.5V, absolute
minimum 1.2V) Try replacing batteries!
Check the orientation of each battery in the battery holder. (-ve end of the battery to the
spring connector).
If LED indicator does not flash 4 times when the batteries are inserted, check the
connectors that plug onto the logger circuit board are pushed on firmly.
If LED still does not flash after the above has been checked, return the logger to the
supplier for service.
No communications from logger.
Try repowering up the logger by removing and replacing a battery.
Check if LED flashes when sending a character to the logger. If not, see if LED flashes in
response to a TBRG bucket tip. If not, check logger power up LED flash sequence.
Check the logger baud rate, number of bits and parity match that of the terminal emulation
program being used on the computer. If not, change it, and try again.
Check the Tx, Rx and Gnd wiring to the logger from the computer.
Check the handshake setting, and try setting to "None" or "Xon/Xoff".
If using "Hardware handshake", check that the Carrier Detect line is high, otherwise the
logger will not transmit any data.
Check that the terminal emulation program is working, by disconnecting the logger and
shorting the Tx and Rx wires together, and type on the computer. You should get each
character twice on the screen.
What I type on the computer does not appear, but the logger seems to respond OK.
Set the terminal emulation program "Local echo" to on.
A TBRG bucket tip flashes the LED but nothing gets transmitted.
Set the event flag (EV) to on to allow events to be transmitted. However the flag should
be off if the logger is connected to an intelligent modem.
Check that the multiplier in the rain increment parameter (RI=x.x/mm)issettoa
reasonable number. Remember that mm bucket tips represent one event.
When I type <CR> (Enter ) on the computer the LED flashes but I get no reply.
Set the response flag (RE) to on. This flag is used to stop the logger responding to data
from an intelligent modem. If you are talking through a modem then this is correct, you
will not get a response to a <CR> (Enter ) because the response flag must be left off.
The logger will not accept my password.