Sea-Bird Scientific Deep SeapHOx V2, User Manual

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Section 5 Deployment and recovery
N O T I C E
Make sure that the screw-in boss seal is tightened or the sensor will flood and void the warranty.
SeapHOx:
The SBE-37-SMP-ODO has an internal pump that operates for one second each time the
sensor collects a sample. The internal pump has several advantages over sensors
without pumps:
• The pump flushes the water from the flow path after each sample and quickly moves
a new sample into the flow path so that conductivity and oxygen measurements are
more accurate.
• Water does not flow freely through the flow path so it stays saturated with the anti-
fouling chemicals.
• The optical DO sensor is integrated in the flow path for better correlation with the
CTD measurement.
The user can operate the sensor in one of several modes:
Autonomous operation
• Operates at user-selected intervals (120–21600 seconds).
• Transmits data in engineering units.
• Operation sequence:
1. The pump operates
2. The sensor makes one measurement
3. The pump stops
4. The data is stored internally in the SeaFET
5. The sensor goes into a low power mode until the next sample is collected.
Polled operation
• Polled data collection is useful when the sensor is integrated with satellite, radio, or
wire telemetry equipment.
• Operation sequence:
1. The pump operates on command
2. The sensor makes one measurement
3. The pump stops
4. The sensor sends the data to the controller
5. The sensor goes into a low power mode until the next command to operate.
SeaFET V2
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