Depth Sensor - Xylem ProSwap 610224-01 User Manual

4.4

Depth Sensor

All ProSwap Loggers have a built-in depth sensor. There are three depth options:
• Shallow vented (0-10 meters)
• Shallow non-vented (0-10 meters)
• Medium non-vented (0-100 meters)
Depth is calculated from the pressure exerted by the water column minus atmospheric pressure. Factors influencing depth
measurement include barometric pressure, water density, and temperature. Readings from vented depth sensors are compensated
for changes in barometric pressure via a vent tube that runs to the surface.
NOTE:
Water density is not factored into the depth measurement if no conductivity sensor is present.
If applicable, enter the depth offset to set the depth measurement to something other than zero. Enter the altitude and latitude of
your sampling location to increase the accuracy of your depth measurement.
NOTE:
The depth sensor is located 18.6 cm from the tip of the water quality sensor installed on the ProSwap Logger bulkhead.
Sensors, Calibration, and Maintenance
Depth Calibration
Calibration in air "zeros" the sensor with respect to the local barometric pressure.
YSI recommends calibrating depth at the location of measurement. A change in
barometric pressure will result in a zero shift for non-vented sensors unless the
transducer is recalibrated to the new pressure.
1.
Make sure that the depth sensor is clean and dry in air, not immersed in
any solution. For best results, keep the bulkhead still and in one position
while calibrating.
2. Cal
Push the key, then select Depth. The Calibration Value is set to 0.000
and should not be changed for air calibrations, even if using an offset.
3.
Observe the actual measurement readings for stability (white line on
graph shows no significant change for 40 seconds), then select Accept
Calibration.
If the depth offset is used, the depth measurement will be adjusted after
calibration.
Depth Maintenance
The depth sensor should be flushed after each use. Fill the syringe (included with
the maintenance kit) with clean water and gently push water through the ports
located on the bulkhead. Flush until clean water flows from the opposite depth
port.
The sensor can be stored wet or dry. For long-term storage, YSI recommends
storing the sensor dry.
NOTICE:
Do not insert objects into the depth ports. Damage to the
depth transducer from incorrect cleaning is not covered by the
warranty.
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