Long Lead Lengths; Sensor Maintenance - Campbell 05103 Instruction Manual

05103, 05103-45, 05106, and 05305 R.M. Young Wind Monitors
5: End (P95)
6: If time is (P92)
1: 0
2: 60
3: 10
7: Set Active Storage Area (P80)
1: 1
2: 101
8: Real Time (P77)
1: 1220
9: Wind Vector (P69)
1: 1
2: 0
3: 0
4: 3
5: 4

7.4.5 Long Lead Lengths

CAUTION
8.

Sensor Maintenance

14
Minutes (Seconds --) into a
Interval (same units as above)
Set Output Flag High (Flag 0)
Final Storage Area 1
Array ID
Year,Day,Hour/Minute (midnight = 2400)
Reps
Samples per Sub-Interval
S, theta(1), sigma(theta(1)) with polar sensor
Wind Speed/East Loc [ WS_ms
Wind Direction/North Loc [ WindDir ]
When sensor lead length exceeds 100 feet, the settling time allowed for the
measurement of the vane should be increased to 20 milliseconds. Theoretical
calculations indicate that 20 milliseconds is conservative.
For the CR200(X) datalogger, enter 20 ms for the Delay parameter of the
ExDelaySE() instruction. For other CRBasic dataloggers, increase the Settling
Time parameter of the BRHalf() instruction to 20 milliseconds (20,000
microseconds). For Edlog dataloggers, use Instruction 4—Excite, Delay (P4)
and enter a 2 in the Delay parameter. Edlog dataloggers cannot use a delay
when the 60 Hz rejection option is used.
Do not use long lead lengths in electrically noisy
environments.
Every month do a visual/audio inspection of the anemometer at low wind
speeds. Verify that the propeller and wind vane bearing rotate freely. Inspect
the sensor for physical damage.
Replace the anemometer bearings when they become noisy, or the wind speed
threshold increases above an acceptable level. The condition of the bearings
can be checked with R.M. Young's Propeller Torque Disc (pn 18310) as
described in the R.M. Young manual (see www.youngusa.com/products/7/).
The potentiometer has a life expectancy of fifty million revolutions. As it
becomes worn, the element can produce noisy signals or become non-linear.
Replace the potentiometer when the noise or non-linearity becomes
unacceptable. The condition of the vertical shaft (vane) bearings can be
checked with R.M. Young's Vane Torque Gauge (pn 18331).
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