YSI Vertical Profiler Systems - Manual (Page 71)

YSI Profiler System USER Manual
time. You will not necessarily be watching real time updates since repetition rates of the
numeric displays delays results.
WHAT SHOULD YOU SEE?
Ports C1, C2, and C3 occasionally flicker on and off. This indicates active communication
between the CR10X and the SDM04 I/O module.
Port C4 should never come on. It is an I/O port dedicated for SDI-12 communication to and
from the sonde.
Port C5 and Port C6 are the motor control ports that indicate when motor is moving and what
direction it is moving.
Port C7 is the Depth Sounder power strobe line. The outputs are indicated at locations _DF_1,
_DF_2, _DF_Max, and _DF_Depth.
The Depth sounder collects two samples. Parameter _DF_1 is the first sample, and _DF_2 is the
second sample. The _DF_MAX is the greater of the two readings that then becomes
__DF_Depth +0.4.
Port C8 is reserved for MET sensors.
YSI Environmental maintains a parameter identification list for its internal use. When a YSI
device outputs a string of data, it usually does not have an identifier associated with it.
However, a command can be sent to a sonde to confirm the location.
Sonde PARA (parameter) identifiers were discussed above. A complete list of identifier number
can be found in Appendix D. In the Numeric Table two examples may be pointed out. First,
you will find in Appendix D that ID #1 is Temperature in Celsius. Second, you will find ID #22
is Depth in Meters. These Identifiers are “set in stone”; they do not change.
So, if we look at the _loc _# in the screen below we can tell that Temp is the first parameter in
the string of data, and the _sdi_1 reading is 23 (23 C). We can also tell that Depth in meters is in
the 7
th
location, and the _sdi_7 is displaying -0.08 meters. The PARA identifiers can vary from
sonde to sonde depending on the user application so the program uses the PARA command
repeatedly to ascertain the depth location in the sonde output data string. This is the only way the
program knows for certain which parameter is Depth in meters. If the sonde Depth is set to Feet,
the PARA command will not return a identifier of 22 and the program is forced to abort into
setup mode. Hence, this is the importance of verifying sonde parameters prior to creating a
profiling routine.
YSI Environmental 669523 Rev B Page 5-12