Table 20 Transducer Table
Transducer Type Units Field Comments
Temperature C C = Celsius
F = Fahrenheit
Angular displacement (wind
direc
tion)
A D = degrees
Wind speed S K = km/h
M = m/
s
N = knots
S = mph, non-standardized
1)
Pressure P B = bars
P = Pascal
H = hP
a
I = inHg
M = mmHg
Humidity H P = Percent
Accumulated precipitation V M = mm
I = in
H = hits
Non-standardized
1)
Time (duration) Z S = seconds
Non-standardized
1)
Intensity
(flow
rate) R M = mm/h
I = in/h
H = hits/h for rainfall
M = hits/cm
2
h
I = hits/in
2
h
H = hits/h for hails
Non-standardized
1)
Voltage U V = volts (also 50 % duty
cy
cle for heating)
N = not in use
F = 50 % duty cycle for
heating
W = full power for heating
Generic G None (null)
P=Per
cent
1) Not
specified in the NMEA 0183 Standard.
7
.4.5 TXT Text Transmission
The text transmission response format:
$WITXT,xx,xx,xx,c--c*hh<cr><lf>
$
Start of the message
Chapter 7 – Retrieving Data Messages
113
sales@streamlinemeasurement.co.uk
www.streamlinemeasurement.co.uk