© Valeport Limited 2003
MIDAS Surveyor Operating Manual
Page 16
0420805d.doc
4.2.3.6
Tide Interval
The MIDAS Surveyor will accept a real time tidal input from a choice of sources. Data from such sources may be
available at variable rates from 1Hz downwards; the user may decide that logging of all these data points is unnecessary.
The "TIDE interval" function allows only selected data points from this input to be logged to memory.
Use up and down arrows to scroll through the logging interval in 1 second increments, from OFF through to 300 seconds
(5 minutes), and F3 to confirm. Note that the instrument will log the last measured data point at the set interval. The
display will continue to show data at the rate at which it is received.
4.2.3.7
Auxiliary Interval
The MIDAS Surveyor will accept a real time auxiliary input from any CRLF terminated RS232 ASCII text source (of less
than 256 characters) - typically this port may be used for Heading input from a Gyrocompass. Data from such sources
may be available at variable rates from 1Hz downwards; the user may decide that logging of all these data points is
unnecessary. The "AUX interval" function allows only selected data points from this input to be logged to memory.
Use up and down arrows to scroll through the logging interval in 1 second increments, from OFF through to 300 seconds
(5 minutes), and F3 to confirm. Note that the instrument will log the last measured data point at the set interval. The
display will continue to show data at the rate at which it is received.
4.2.4
RS232 COM PORTS
The MIDAS Surveyor is fitted with a total of 7 serial ports for data input / output. This sub-menu allows the baud rate of
each port to be configured to suit.
Data output is only available on the Main Port - this should also be used for all PC communications. The remaining ports
are numbered 1 to 6, and are configured for use with the following data input types. All ports are RS232 only, 8 data bits,
1 stop bit, No Parity.
Serial PC Com
Data output and PC communications.
Serial 1
External GPS or Differential Input
Serial 2
External digital echosounder input
Serial 3
Sound Velocity Input
Serial 4
Tide Input
Serial 5
Heave Input
Serial 6
Auxiliary (or Gyrocompass) Input
To change the baud rate of each port, select it from the sub-menu. Use up and down arrows to scroll through the
available baud rates, and Enter to confirm:
2400
38400
4800
57600 (Main Port Only)
9600
76800 (Data Input Ports Only)
19200
115200
Note that for data upload to PC it is recommended that the highest possible baud rate is used.
