Campbell Met One 034A-L Spezifikationen PDF herunterladen (Seite 13)

Met One 034B Windset

10: Set Active Storage Area (P80)

1: 1 Final Storage Area 1

2: 101 Array ID

11: Real Time (P77)

1: 1220 Year,Day,Hour/Minute (midnight = 2400)

12: Wind Vector (P69)

1: 1 Reps

2: 0 Samples per Sub-Interval

3: 0 S, theta(1), sigma(theta(1)) with polar sensor

4: 3 Wind Speed/East Loc [ WS_ms ]

5: 4 Wind Direction/North Loc [ WindDir ]

5.5 Long Lead Lengths

When sensor lead length exceeds 100 feet, the settling time allowed for the

measurement of the vane should be increased to 20 milliseconds.

For dataloggers programmed with CRBasic, increase the “Settling Time”

parameter of the CRBasic instruction to 20 milliseconds (20,000

microseconds).

Dataloggers programmed with Edlog should use Instruction 4 – Excite-Delay

(P4), rather than Instruction 5 – AC Half Bridge (P5). Enter a 2 in the Delay

parameter for a 20 millisecond delay.

With a CR510 or CR10(X), use a 2500 mV excitation and the 2500 mV

measurement range. With a 21X, CR7, or CR23X, use a 5000 mV excitation

and the 5000 mV measurement range.

The 60 Hz rejection option can not be used with the DC

Half Bridge instruction, when the delay is not zero. Do not

use long lead lengths in electrically noisy environments.

CAUTION

TABLE 5-4. Multiplier and Offset for Wind Direction when

using Lead Lengths Greater than 100 Feet

Units

Datalogger

Type

Instruction

Number

Multiplier

Offset

degrees CR10(X)

CR510

4 0.288 0

degrees CR23X

CR7, 21X

4 0.144 0

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 41 42

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