Campbell Scientific 034A-L WindSet User Manual
Page 8
MET ONE 034A-L WINDSET
4
TABLE 5-1. Multipliers and Offsets for Wind
Speed and Direction
Units
Datalogger
type
Instruction
number
Multiplier
Offset
m s
-1
CR10(X)
or 21X
3
0.7990
0.2811
mph
CR10(X)
or 21X
3
1.789
.629
degrees
CR10(X)
or 21X
5
720
0
NOTE: 034A-L Windsets purchased
directly from Met One Instruments have a
different configuration on the 6 pin
connector. In addition, they do not have the
10 k
Ω resistor on the excitation line. The
wiring diagram and the multiplier and offset,
for wind direction, are different than the
examples in this document.
EXAMPLE 1. Sample CR10(X) Instructions
;{CR10X}
;
*Table 1 Program
01:
10
Execution Interval (seconds)
01:
Pulse (P3)
1:
1
Reps
2:
2*
Pulse Channel 2
3:
22
Switch Closure, Output Hz
4:
1*
Loc [ WndS_m_s ]
5:
0.7990
Mult
6:
0.2811
Offset
;Set the wind speed to zero if the wind is not blowing.
;
02:
If (X<=>F) (P89)
1:
1*
X Loc [ WndS_m_s ]
2:
1
=
3:
0.2811
F
4:
30
Then Do
03:
Z=F (P30)
1:
0
F
2:
0
Exponent of 10
3:
1*
Z Loc [ WndS_m_s ]
04:
End (P95)
05:
AC Half Bridge (P5)
1:
1
Reps
2:
25
± 2500 mV 60 Hz Rejection Range
3:
5*
SE Channel
4:
3*
Excite all reps w/Exchan 3
5:
2500
mV Excitation
6:
2*
Loc [ WndD_deg ]
7:
720
Mult
8:
0
Offset
06:
If time is (P92)
1:
0
Minutes (Seconds --) into a
2:
30
Interval (same units as above)
3:
10
Set Output Flag High (Flag 0)