
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 kΩ 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)
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