YSI Vertical Profiler Systems - Manual (Page 68)

YSI Profiler System USER Manual
Set Flag 6 to read the sonde via the SDI-12 communication port. The results to interpret
appear in the left two columns as in the previous test. The _CSDIcntr refers to the counter for
SDI-12 readings. Approximately every 2.5 seconds the counter increments. The readings may
vary based on the DO warm up setting, but a typical count would be 17 to 18. The reading
above is 15.00, and is considered acceptable. In some applications where two wiping cycles are
required for optical probes, counts may exceed 18. Each wiper takes about 38 seconds, therefore
76 seconds for two optical wipes. This would result in a count that would exceed 30 even
though DO warm up remained 60 seconds. The maximum number allowable for this counter is
35.
Test 3: Depth Finder Reading Response
NOTE:
Perform this test only if your system has a Depth Finder or Fixed Reference sonde. If
you employ User Defined Depth, neither Flag 3 nor Port 7 will show a response.
This test should be executed to verify that the Depth Finder (depth sounder) sensor is working. In
order to observe any reasonable reading the depth finder must be in water. You can simulate this
inside with a bucket or barrel of water. The movement from water to air or vice versa can reveal
qualitatively if the depth finder is working.
Set Flag 3 to read the Depth Finder result. The results to interpret appear in the left columns of
the Display as in previous tests. The _DF_Max term designates the cell to look for results. The
result in this example is 0.00, indicating an operational depth finder. A faulty sensor or a sensor
in air only will likely read –INF.
If your system is configured with a Fixed Reference Sonde rather than a Depth Finder, then add
Location _92 RefTmp and _92RefDpt to the Numeric Screen. The information you need will be
displayed in these locations and in the __sdi_# column.
IMPORTANT:
The Fixed Reference Sonde must be set to have only two Report parameters enabled:
Temp in C, and Depth in Meters. They must appear in the order shown and in the
units of measurement shown.
Test 4: Winch Motor Responses
You should perform this test to verify that the winch motor is operating, and works in two
directions (pays out; reels in). First note that this is a Port set, not a Flag set as in the previous
tests.
CAUTION:
Port 5 should be set OFF to perform this test for the first time. This will result in cable
paying out, not reeling in, which could cause problems if the sonde is not connected.
Set Port 6 ON to turn on the Winch motor. The motor should turn on and pay out cable. The
sonde does not need to be connected to perform this test. Help guide the cable with some hand
YSI Environmental 669523 Rev B Page 5-9