Specifications

HYDROLOGICAL SERVICES
DL3 100-042 IMP
Issue 2: 15/11/2005
an accuracy of better than 30 seconds per month with resolution to one second across an
operating temperature range from -10 Cto+70 C.
5.1.9 Logger Identification
Each logger has a six digit unique identification number hard coded and accessible as a read only
system parameter via software.
5.1.10Start-up Indicator
The periodic removal and replacement of the logger to facilitate data processing, may be
performed by unskilled personnel without the aid of computer equipment to verify operation. On
power up of a replacement logger, as well as when an event occurs a visual indicator (LED flash)
confirms successful operation. This LED flashes 4 times on power-up, 3 times when a TBRG
connect occurs and 2 times when a TBRG disconnect occurs. (See section 3.1.1. and section
4.2.1. for connect / disconnect information)
5.1.11Transient, EMI, RFI Protection
The RRDL-3 logger passes the following tests :-
Transient - withstands at least 10 transient pulses, with each pulse having a nominal
energy of 20 Joules and a peak positive or negative voltage of 500 volts, between the
ground reference and each conductor that enters the logger.
EMI - exposure to DC and 50/60 cycle, 200 gauss magnetic field operated at any
position around the logger to a minimum distance of 1 metre.
RFI - exposure to a continuous and pulsed AM and FM transmitter, with and without
modulation, that is operated in close proximity to the logger unit. ( e.g. a 5 watt
transmitter directly adjacent and a 60 watt transmitter operating to a minimum distance of
1 metre).