SonTek/YSI
32
ADVField Operation Manual (September 1, 2001)
3.6. Setup Commands
Setup commands affect the real-time data collection parameters of the ADVField:
! Temperature ! Sampling rate (also a Deployment command; §3.7)
! Salinity ! Coordinate system
! Velocity range ! External synchronization
Each command is shown with its full name, short name (if one exists), optional parameters (in
brackets), and appropriate descriptions.
Temp [d.d]
• Default parameter:
20.0
(°C)
• Parameter range:
-2.0
to
50.0
(°C)
• Without parameter: returns its current setting.
• When used with a valid parameter, the user-specified temperature is set to this value.
• This temperature is used to calculate sound speed if
TempMode
is set to
USER
.
• Generally, a temperature change of 5°C results in a change in sound speed of 1% (see ADV
Principles of Operation regarding the effect of sound speed on velocity data).
Sal [d.d]
• Default parameter:
34.5
(parts per thousand; ppt)
• Parameter range:
0.0
to
60.0
(ppt)
• Without parameter: returns its current setting.
• When used with a valid parameter, the salinity is set to this value.
• This salinity value is used to calculate sound speed.
• Generally, a salinity change of 12 ppt results in a change in sound speed of 1% (see ADV
Principles of Operation regarding the effect of sound speed on velocity data).
VelRange or VR [d]
• Default parameter:
4
(see Table 13 to translate this index value for your system)
• Parameter range:
0
to
4
(see Table 13)
• Without parameter: returns its current setting.
• When used with a valid parameter, sets the maximum velocity range based on the values in
Table 13. Each index value corresponds to the velocity range settings specified in the ADV
probe configuration file.
CAUTION:
If an incorrect probe configuration file is specified, ve-
locity data will be invalid.
• See ADV Principles of Operation for details about velocity range settings.
Table 13. Velocity Range Index Values
Index
16-MHz & 10-MHz ADV
Maximum Velocity Values
5-MHz ADVOcean
Maximum Velocity Values
Vel. Range Horizontal Vertical Vel. Range Horizontal Vertical
0
±3 cm/s ±30 cm/s ±8 cm/s ±5 cm/s ±30 cm/s ±8 cm/s
1
±10 cm/s ±60 cm/s ±15 cm/s ±20 cm/s ±40 cm/s ±10 cm/s
2
±30 cm/s ±120 cm/s ±30 cm/s ±50 cm/s ±80 cm/s ±20 cm/s
3
±100 cm/s ±300 cm/s ±75 cm/s ±200 cm/s ±300 cm/s ±75 cm/s
4
±250 cm/s ±360 cm/s ±90 cm/s ±500 cm/s ±500 cm/s ±120 cm/s
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