he MIDAS BathyPack is one of Valeport's premier MIDAS
products, using state of the art sensors to generate precision
Sound Velocity and Density profiles for highly accurate depth
and height data. The simple top-end PC software, BathyLog,
also allows all profile data to be used to monitor and correct
multiple miniIPS pressure sensors, giving you the complete
picture with one integrated sensor suite.
Sensors
Conductivity
Robust, accurate inductive cell. Digital sampling technique means no more
field calibrations.
Range: 0 - 80 mS/cm
Accuracy : ±0.01 mS/cm
Resolution: 0.002 mS/cm
Temperature
Fast response PRT with guard.
Range: -5 to +35 °C
Accuracy: ±0.005 °C
Resolution: 0.002 °C
Pressure
Revolutionary temperature compensated piezo-resistive sensor; all the
performance of a resonant quartz sensor but with long term stability and
better durability. No more oil!
Range: 10, 30, 100, 300 or 600Bar
Accuracy: ±0.01% range
Resolution: 0.001% range
Sound Velocity
Valeport’s digital time of flight sensor - the most accurate SV sensor in the
world.
Range: 1375 - 1900 m/s
Accuracy: ±0.02 m/s
Resolution: 0.001 m/s
Altimeter
BathyPack accepts a variety of industry standard devices. Typical
specification:
Frequency: 500kHz
Range: 0 - 50 m (6000m depth rating)
Resolution: 1mm
Calculations
Density: EOS-80 Equation of State of Seawater
Salinity: PSS78 Practical Salinity Scale
Depth: UNESCO Pressure/Depth Relationship
or Simplified "Mean Density" Correction
Data Acquisition
Data Sampling: 2Hz
Lookup Table: 6000 points (1m res. @ max depth)
Sampling Sequence: Synchronous
MIDAS BathyPack
Datasheet Reference: MIDAS BathyPack version 2A, Feb 2011
Communications
The instrument will operate by direct communications with PC before
and after deployment. It also operates in real time, with a choice of
communication protocols for a variety of cable lengths, all fitted as
standard and selected by pin choice on the output connector:
Standard
RS232 Up to 200m cable, direct to serial port via USB
adaptor
RS485 Up to 1000m cable, addressable half duplex
comms
Baud Rate: 2400 - 115200
Protocol: 8 data bits, 1 stop bit, No parity, No flow control
Electrical
External Power: 12 - 30vDC
Power: Nominal 4W max
Connector: Subconn MCBH10F
Physical
Materials: Titanium housing, polyurethane, composite and
polycarbonate sensor components
Depth Rating: 6000m (may be limited by pressure sensor)
Instrument Size: 88mmØ x 425mm long
Weight: 6kg
Shipping: 74 x 35 x 27cm, 13kg
Software
System is supplied with BathyLog Windows based PC software, for
instrument setup and data display. BathyLog is licence free.
