WIND INSTRUMENT
INTERFACE. Wi1600
The instrument connects to Thomas Walker's 2060 (and other)
cup and vane wind sensors. It converts the
wind direction to low power SYNCHRO output. Speed is
converted to a variable DC voltage. The original application was for the UK survey vessel
HMS
SCOTT in 1996 to feed the hydrographic computer system.
The interface also outputs wind speed and direction in NMEA
0183 format.
 | INPUT:
 | Connect to wind direction potentiometer 0-8 volts. |
| EPROM option for using port/starbord output from T.W.
electronic converter. |
| Connect to pulses from anemometer |
|
| DIRECTION OUTPUT:
| Synchro 115v reference 90v line-line max. 1 mA per phase.
S2 grounded. |
| Drives a high impedance isolated electronic interface. |
| Angle precision better than 5 percent limited by accuracy
of Walker's wind vane unit. |
| Voltage precision +/- 15 percent. |
| Frequency that of power input, nominal 50/60 Hz or 400
Hz. |
|
| SPEED OUTPUT:
| DC level 140 mV/knot, |
| Load resistance to be greater than 7Kohm. |
| Maximum output 11.76 v, 84 Kts. |
| Precision better than 2 percent, limited by accuracy
of Walker's anemometer. |
|
| NMEA 0183 OUTPUT:
| IMO approved sentence $WIMWV,ddd,R,ss,N,A*HH cr lf (ddd =
direction 0 - 359. R=relative. ss = speed HH=checksum ) |
| Maximum speed 255 knots. |
| Rate 1 per second. |
|
| POWER ETC:
| 115v 50/60/400 Hz. 20 VA |
| Grey painted electrical cabinet with door for indoor
bulkhead mounting. |
| Size, 300 x 400 x 150 mm. |
|
