AWG 64 MB MEMORY CARD FOR WII Specifikace stáhnout pdf (Strana 41)

TEAM Climate Monitoring Protocol 3.0

Figure 13. Diagram illustrating operation and calibration schedules for Temperature/RH sensors (also

applies to the radiation sensors). Sensors are sent out for calibration at the end of their second year of

operation except for the first year, when sensor 2 is sent out (to get sensors out of sync and allow alternation).

During year 2 and afterwards there are always 2 sensors operational and one is out for calibration (and can

be used as a spare when it returns).

6.4.2 Precipitation gauge (TB4)

The TB4 requires very little maintenance and should work well as long as the tipping mechanism

is not disturbed. However, the precipitation gage should be calibrated annually to ensure accurate

rainfall measurements. Record the results in the Sensor Calibration Form. The manufacturer

recommends the following process:

• Remove the cover from the gauge by loosening the screws on the sides.

• Check the bubble level to ensure the gauge is perfectly leveled. If not, adjust the nuts on

the mounting bracket to level the unit.

• Slowly pour through 314 cc of water through the inner funnel over a 15-minute period

(this is equivalent to 10 mm of rain). Have a second person count the number of tips as

the water is poured.

• The gauge should have tipped 39 times. Fill in the time, date and number of tips in the

Sensor Calibration form.

• Submit the information to the TEAM portal: Every time the tipping gauge is

calibrated submit the information on the Sensor Calibration Form to the TEAM portal.

See section 6.1.4 for instructions on uploading the Sensor Calibration Form.

If the gauge did not tip 39 times, send it back to the manufacturer for a recalibration. Replace the

gauge with a duplicate until it is returned.

• Heavy rainfall events: as described above in section 6.2, check extreme rainfall events

(>50 mm/hour) against a manual precipitation gauge. Record the results in the Sensor

Calibration Form and submit with the next data upload. See section 6.1.4 for instructions

on uploading the Sensor Calibration Form.

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AWG 64 MB MEMORY CARD FOR WII Specifikace Strana 41