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i. “<esc>$” soft iron calibration, align system to N,S,E,W magnetic
j. “<esc>A” Set averaging to smooth the readings
Note: These are the most common commands used (configurations will vary).
Depth or other sensor Connection for OS5500-USG
OS5500-USG connection with MSI pressure transducer, sensor outputs 1.-5V.
OceanServer compass has internal series divider to change voltage range to .5-2.5V
(3K+3K ohm series)
Note: See page 7 for assignment of pins 3-7.
OS5500-USG commands: <esc> M nnnn <enter> enter max pressure for sensor PSI <esc>P<space> set
zero depth, pressure output via 24 bit AD, resolution in 0.01 feet. Note: Depth assumes fresh water, no
internal density correction. If M0<enter> is set the device will output the sensor voltage for use with non-
depth sensors. One example would be an altitude sensor for airborne applications.
Remember the OS5500 pressure input (white wire) has an internal voltage divider to allow an external 0-5V
signal to be input to the AD converters 0 – 2.5V input. The resistance values are two 3K resistors in series to
ground (6K resistance to ground.). The output of your sensor must consider this divider in it’s output drive
circuit.
