SECTION 3. PROGRAMMING
3-3
12:
P30
Z=F
01:
0
F
02:
0
Exponent of 10
03:
8
Z Loc [:WS mph ]
13:
P95
End
3.1.3 WIND DIRECTION
The wind direction potentiometer is read using
Instruction 4 and the result placed in Location 9.
The measurement is delayed 20 ms longer than
normal after applying the excitation. The
potentiometer has a 5
°
deadband between 355
and 360
°
; measurements in this region are
acceptable because they are close to 0. The
multiplier is 355/2500 = 0.142
°
/mV. The offset
is zero.
The wind direction sensor is mounted such that
a 0
°
reading occurs for an east direction; 90
°
is
added to each measurement and 360
°
subtracted if the result exceeds 360
°
.
14:
P4
Excite,Delay,Volt(SE)
01:
1
Rep
02:
5
500 mV slow Range
03:
3
IN Chan
04:
2
Excite all reps w/EXchan 2
05:
2
Delay (units .01sec)
06: 2500
mV Excitation
07:
9
Loc [:Wind Dir ]
08:
.142
Mult
09:
0
Offset
15:
P34
Z=X+F
01:
9
X Loc Wind Dir
02:
90
F
03:
9
Z Loc [:Wind Dir ]
16:
P89
If X<=>F
01:
9
X Loc Wind Dir
02:
3
>=
03:
360
F
04:
30
Then Do
17:
P34
Z=X+F
01:
9
X Loc Wind Dir
02: - 360
F
03:
9
Z Loc [:Wind Dir ]
18:
P95
End
3.1.4 RAIN GAGE
Instruction 3 is used to read the switch closure
from the tipping bucket rain gage; 1/100 of an
inch of rain per tip.
19:
P3
Pulse
01:
1
Rep
02:
2
Pulse Input Chan
03:
2
Switch closure
04:
10
Loc [:Rain Fall]
05:
.01
Mult
06:
0
Offset
3.1.5 SOLAR RADIATION
Instruction 2 is used to obtain a differential
voltage measurement and place the result in
Location 7 in units of kWm
-2
. The solar sensor
output is trimmed with a potentiometer to
provide a constant multiplier of 0.2 kWm
-2
/mV
for all units.
09:
P2
Volt (DIFF)
01:
1
Rep
02:
2
7.5 mV slow Range
03:
3
IN Chan
04:
7
Loc [:kW/m2 ]
05: .
2
Mult
06:
0
Offset
3.1.6 INTERNAL MOISTURE DETECTION
SENSOR
The moisture sensor is used to detect
humidities above 33% inside the canister
(electronics). The value stored in Location 3
ranges from 0 to 1000 for dry to wet when
programmed as shown below.
23:
P5
AC Half Bridge
01:
1
Rep
02:
13
25 mV fast Range
03:
12
IN Chan
04:
3
Excite all reps w/EXchan 3
05: 2500
mV Excitation
06:
3
Loc [:moisture ]
07:
201
Mult
08:
0
Offset
24:
P37
Z=X*F
01:
3
X Loc moisture
02: 1000
F
03:
3
Z Loc [:moisture ]
25:
P45
Z=INT(X)
01:
3
X Loc moisture
02:
3
Z Loc [:moisture ]
Содержание 012
Страница 1: ...012 WEATHER STATION OPERATOR S MANUAL REVISION 9 91 COPYRIGHT c 1989 1991 CAMPBELL SCIENTIFIC INC...
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Страница 18: ...SECTION 2 WEATHER STATION INSTALLATION 2 8 FIGURE 2 5 2 Battery AC Charging Connections...
Страница 20: ...SECTION 2 WEATHER STATION INSTALLATION 2 10 FIGURE 2 6 1 RAD Modem Connections...
Страница 21: ...SECTION 2 WEATHER STATION INSTALLATION 2 11 FIGURE 2 6 2 Phone Modem Connections...
Страница 22: ...SECTION 2 WEATHER STATION INSTALLATION 2 12 FIGURE 2 6 3 012 Weather Station with Radio Antenna...
Страница 23: ...SECTION 2 WEATHER STATION INSTALLATION 2 13 FIGURE 2 6 4 012 Weather Station with Storage Module...
