YSI 6 series User Manual page 186

650 MDS
3.9.4 LOGGING BAROMETER READINGS
To log barometric pressure readings with the 650, the following conditions (similar to those above for
logging GPS readings) must be met:
 Barometer readings can ONLY be logged to 650 memory – the system does NOT support logging to
sonde memory.
 The barometer readings must be logged to 650 memory from the 650 Run display along with sonde
sensor readings. This means that you must have a sonde attached to your 650 in order to log barometer
readings. Logging of barometer readings is not supported without sonde attachment even though these
readings can be viewed in the Status Bar with no sonde attached.
If your want to log barometer readings to 650 memory, you must make certain that the Store

Barometer option is active in the Logging setup menu of the 650.
Once these conditions are met, follow the instructions in Section 3.5.3 above for logging of sonde sensor
readings to 650 memory. The barometer readings will automatically be added to the file at the sample interval
selected for the sonde readings.
Barometer readings stored in 650 memory will remain as part of the sensor data file that can be viewed
from the 650 display and/or uploaded with the data file for analysis in EcoWatch for Windows. The
barometric pressure readings are processed as a normal parameter by EcoWatch, with the user having the
ability to change units from the EcoWatch menus. For example, data stored in 650 memory in units of mm
Hg units can easily be converted to readings in mBar after upload.
YSI Environmental Monitoring Systems Operations Manual
Section 3
3-56