CiDRA Passive Sonar Transmitters - Manual (Page 36)

Table 5 Modbus Holding Registers (continued)
Address Size Type Value Description Values
4009 2 Float
SOS_SPECIFIC_GR
AVITY
This parameter (internally multiplied by 1000 kg/m^3) is
used to set the 'SOS Liquid Density'. For example,
Specific Gravity = 1.1 equates to density of 1.1 * 1000
kg/m^3.
4011 2 Float SOS_LIQUID_SOS
Pure phase liquid SOS for process fluid in ft/sec. Used
for GVF calculation. Default setting is for water and is
close enough for most fluid/gas applications.
4013 2 Float
SOS_SPECFIC_HE
AT_RATIO
4015 2 Float
SOS_LIQUID_DENS
ITY
Calculated from 'SOS Specific Gravity'.
4017 2 Float
SOS_TEMPERATU
RE
Constant temperature for GVF calculations when 'Fixed'
is selected for 'SOS Temperature Input Selection'. In
configured units.
4019 2 Float SOS_PRESSURE
Constant pressure for GVF calculations when 'Fixed' is
selected for 'SOS Pressure Input Selection'. In
configured units.
4021 2 Float GAIN
4023 2 Float SPL_THRESHOLD
This value is the threshold that the Average SPL must
break in order for any SOS or VF calculations to be
performed. A quality of -2 is reported if this threshold is
not met. Set this value to 0 to disable SPL.
4025 2 Float SPL_AVG The average SPL measurement from all active sensors.
4027 2 Float SPL_STD_DEV
The standard deviation of the SPL measurements from
all active sensors.
4029 2 Float SAMPLE_FREQ
Set A/D sample frequency in samples per second. Enter
one of the following: 3906.25 or 2055.921.
4031 2 Float CHANNEL_SKEW Flow Channel Skew.
4033 2 Float FREQ_MIN
Set minimum frequency for k-w processing. Normally set
by DSP. User modified if using single or fixed modes or
auto mode with VF_OP_MODE_SETTINGS set to 1
(FIXED_FREQUENCY). Go to Idle mode, then set this
parameter, then select single/fixed.
20959-01 Rev 02 Page 3-21