Page 40
JANUARY 2010 - TD 220a DEPLOYMENT GUIDE, RDCP600
In the
Sensors page
, select the required parameters
NOTE! For PDC-4 real-time output: Select only
the required elements, as each parameter takes 4
seconds to transmit.
The order in which the channels are transmitted is pre-determined for PDC-4 and can be found
in the PDC-4 export utility (refer to
Error! Reference source not found.
). The first channel is
the reference channel. For current measurements all the data from column 1 will be sent before
the data from column 2. The first channel in a column is here always the channel nearest the
transducer. If a surface cell is defined this becomes column 0 and will be transmitted before the
current measurements.
Before sending data in real-time using PDC-4, the RDCP 600 must create artificial coefficients
and convert the measurements into PDC-4 binary code format (except for the SR10/VR22
sensors connected to the Top end plate; here the coefficients are entered manually into the
instrument). The coefficients are scaled by the sensor range, and can vary dependent on which
sensors are used. Within the sensor range the coefficients are fixed.
The stored coefficients and other information about the PDC-4 output can be found in the PDC-
4 export utility, as described below.
Figure 1-25 Real-Time output, Sensors
PDC-4 recording and transmitting:
The RDCP 600 starts recording 1 min before the first
recording interval begins; then the records are transmitted at the end of each recording
interval.
