Campbell Met One 034A-L Manual de Instruções descarregar pdf (Página 20)

Met One 034B Wind Set

7.4.4 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).

8. Sensor Maintenance

Monthly

• Do a visual/audio inspection of the anemometer at low wind speeds.

Verify that the cup assembly and wind vane rotate freely. Inspect the

sensor for physical damage. Verify cups and vane are tight.

6 Months

• Replace anemometer bearings if operating under harsh conditions.

Annually

• Replace anemometer bearings. Refer to the Assistance page at the

beginning of this document for the procedure of returning the sensor to

Campbell Scientific for bearing replacement.

2 Years

• Replace the wind vane potentiometer and bearings. Refer to the

Assistance page at the beginning of this document for the procedure of

returning the sensor to Campbell Scientific for wind vane and bearing

replacement.

9. Troubleshooting

9.1 Wind Direction

Symptom: NAN, –9999, or no change in direction

1. Check that the sensor is wired to the excitation and single-ended channel

specified by the measurement instruction.

2. Verify that the excitation voltage and range code are correct for the

datalogger type.

3. Disconnect the sensor from the datalogger and use an ohm meter to check

the potentiometer. Resistance should vary from 11 to 21 kohms between

the blue and green wires depending on vane position. Resistance should

vary from 1 to 11 kohms between the white and green wires depending on

vane position.

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Campbell Met One 034A-L Manual de Instruções Página 20