Sensors and Interfaces for Mooring


               Output     Sensor    Output  Current Supply   Data  Control
  Sensor        Type       Range     Range   (ma)   Voltage  Size   (1)
  ------       ------     ------    ------  -----   -------  ----  -------
ATLAS
  Controller   RS232        n/a       n/a     3       5 V     n/a   RS232
  Temp        freq (2)    8-32 C    1-5 KHz  1 (3)   10 V    11x2    pwr
  Pressure    freq (2)   0-750 psi  1-5 KHz  1 (3)   10 V     2x2    pwr
  Wind Speed  AC freq    .7-50 m/s  7-500Hz    0     0 (4)     2    none
   w/interface Analog    .7-70 m/s  0-1 VDC    ?    8-15 V     2     pwr?
  Wind Directn Analog    0-355 deg  0-10Kohm 1 (5)  5-15 V     2     pwr
  Compass     ac phase   0-360 deg     ?      ?       ?       0-2     ?
  Humid./Temp Analog      0-100%    0-1 VDC   15    8-30 V     4     pwr(11)
                         -50-150C  -.5-1.5 V          (12)

Seabird CTD   RS232 (6)   -5 - 35 C   n/a    Batteries         4    RS232
			  0-7 S/m
PAR (2)      Analog cur  0-3000 uE  0-20 ua   0      none     2x2   none

Fluorometer(7) Analog    0-30 mg/m3 0-5 VDC  150   10-15 V     2     pwr
  w/recorder  RS232 (6)  0-30 mg/m3   n/a    Batteries         2    RS232

Transmiss.(8)  Analog     0-100%    0-5 VDC   10    9-15 V     2     pwr

ADCP          RS232          ?        n/a    Batteries       40x2   RS232
GPS           RS232
Spectrorad.   RS232

Interface
---------
Pkt Radio
  tranmitter    n/a         n/a       n/a    20/866  6-9 V   none   (10)
  TNC/modem   serial (9)    n/a       n/a      35    5-12 V  none    n/a
ARGOS         serial (9)    n/a       n/a   .15/500  7-11 V  none   wakeup
User I/F      RS232/485     n/a       n/a      0     n/a     none    n/a
OASIS Controller                               10    9-18 V


Notes:
(1)  For Control field: "pwr" means turn power on to operate sensor, 
     "none" means sensor is always on (for sensors that don't consume power),
     "RS232" means program the data acquisition via RS232 port.

(2)  Impresses an ac current on power conductor.  To decode, requires a
     pulse transformer to convert to voltage.

(3)  Consumes 0.5 ma for 30 seconds that the string is powered, and
     8 ma for the two seconds that it transmits.  Avg is 1 ma.

(4)  Acts as AC generator.  Output voltage and frequency both proportional
     to wind speed:  10 Hz/(m/s), 100 mv p-p @ 60 rpm (= 180 Hz, 18 m/s).

(5)  Is a 10 Kohm potentiometer.  Current is a function of voltage applied.
     For example, applying 10VDC consumes 1 ma.  Note that output is open
     for the 5 degree dead band.  Should be clamped by signal conditioning
     circuit.

(6)  Xmit and Rcv only, no handshake lines.

(7)  Sensor has internal integrator, selectable time constants of
     0.1, 1, 3, or 10 seconds.  At 3 second default, should operate for
     at least 15 seconds before acquiring data.

(8)  Needs 3 second warmup.  Response time is 0.1 second.  Manufacturer
     suggests integrating for at least 17 ms before doing A/D conversion.
     Sensor can provide data at 14 bit resolution.

(9)  RS232 signalling but at TTL voltages.

(10) Carrier detect output, channel select input, TTL.

(11) 0.5 seconds minimum.

(12) Optionally, connect to regulated +5 (+/- 0.3%), current goes down
     to 10 ma.