24
Operation
Salinity
→ Salinity
Salinity is determined by calculations derived from the conductivity and
temperature sensors.
When a conductivity sensor is installed, the instrument will automatically
use the salinity measurement for DO and “As Measured” will be
displayed. If no conductivity sensor is installed (e.g. ODO/T cable
assembly used), the salinity value will be user-selectable.
ODO Cap Prompt
→ ODO Cap Prompt
The handheld can remind users when it is time to replace the ODO Cap
based on a user-defined interval (Figure 34). To set the reminder, select
ODO Cap Prompt and input a number in months. YSI recommends
enabling this setting to match the warranty period of the ODO Cap:
• ProDSS ODO Sensor Cap [SKU: 626890] = 12 months
• ODO Extended Warranty Sensor Cap [SKU: 627180] = 24 months
The handheld will automatically recognize the last time the ODO Sensor
Cap coefficients were updated and alert the user when the Cap is due
for replacement. To disable the prompt, simply enter 0 for the number of
months.
GPS (Optional)
→ GPS
Some handhelds feature a built-in GPS. GPS turns the handheld Global
Positioning System On or Off. The
symbol is shown when a GPS signal
is received (Figure 35).
When enabled, the GPS coordinates will be saved with the Calibration
Record and logged data. Note that the battery will drain more rapidly
when GPS is enabled than when it is not enabled.
NOTE: GPS data will be most accurate when there is a clear line of sight
to satellites. It may be difficult for the handheld to receive a good
GPS signal when under canopy or indoors.
Figure 35 GPS
Figure 34 ODO Cap Status
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