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© Valeport Limited
3.7
RANGE SETTINGS
The VA500 has a standard operational range of 0.1m to 100m. If required this can be
restricted with the setting of a minimum range and maximum range.
The default setting for sound speed used to calculate range is 1500 m/s
# code
Followed By:
#021
;Range_units
#022
<CR>
#118
;0 or 1 or 2<CR>
#119
<CR>
#823
;maximum range<CR>
#824
<CR>
#840
;maximum range<CR>
#841
<CR>
#830
; Value, <CR>
#831
<CR>
3.8
PRESSURE SETTINGS
The pressure sensor fitted to the VA500 measures absolute pressure, i.e. it includes
atmospheric pressure. The pressure tare function allows the atmospheric pressure (as
measured by the sensor before deployment) to be removed from the readings, so the output
is simply pressure of water. Note also that by taking a tare reading at any fixed point in the
water column, readings will then be output relative to that point.
# code
Followed By:
#009
;<CR> or ;VALUE<CR>
#010
<CR>
#011
;ON<CR> or ;OFF<CR>
#012
<CR>
#016
;Latitude <CR>
#017
<CR>
#018
;Pressure units<CR>
#019
<CR>
#083
;0 or 1 or 2 or 3
#084
<CR>
VA500 Altimeter Manual
Operation
Set to either
0 – Seconds
1 – Metres
2 – Feet
3 – Fathoms
Read range units set above
Set Altimeter Error output message
Where 0=zero (0.000), 1=-999, 2=NR
Reads Altimeter Error output message
set the maximum range that is considered when processing
data (acoustic returns beyond maximum range are ignored)
Reads maximum range
set the minimum range that is considered when processing
data (acoustic returns before minimum range are ignored)
Reads minimum range
Variable to change the Speed of Sound ms-1
Reads the sound speed
Operation
Sets the tare value in systems with pressure fitted.
;<CR> = Makes device take a reading to use as tare.
;VALUE<CR> = User entered value in units as set by #018
command.
Returns the tare value
Turns Tare function ON/OFF
Reads Tare mode
Sets Latitude
Reads Latitude
Set to either
0 – dBar
1 – Metres
2 – Feet
Read pressure units
Setup the pressure output format
Where
0=not fitted, 1=PPPP.P, 2=PPP.PP, 3=PP.PPP
Returns the set pressure range
Page 13
0430831e_VA500_Altimeter_Manual
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