Vaisala WAT12, Руководство пользователя

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4. Maintenance
4.1 Periodic maintenance
Every 1-2 years, make sure that the printed circuit board is not corroded.
4.1.1 Testing proper operation
For easy testing and adjustment, reference signals are provided for the 2 output channels. For
instance, by inserting a jumper plug, an output can be forced to the full scale or zero level. A
readout device can be easily adjusted to comply with the transmitter output. Inside the
transmitter box, there is a label showing all the useful jumper combinations for output scale,
measurement range, and testing.
Table 6 Jumper selectable reference sources for testing
Variable Reference signal alternatives
Direction 000°, 008°, 357°
Speed 0.0 m/s, 0.8 m/s, 51.2 m/s
1. To remove WAT12 cover, remove the 4 screws holding the cover.
2. To enable the test stage, remove the jumper J5 from the jumper block X4.
3. Select one of the direction and speed alternatives with jumpers J1 , J2 , J3 , and J4 .
Table 7 Output values for jumpers in test mode
Jumper Output value
J1 ON 51.2 m/s
J2 ON 0.8 m/s
J3 ON 357°
J4 ON 008°
All open 0 m/s and 000°
For the location of the jumper block X4, see Figure 3 (page 12) .
4. Verify the readings with the data collecting system at the receiving end.
5. To end the test stage, reattach the jumper J5 to the jumper block X4.
6. After a successful test, carefully reattach the enclosure cover with the 4 screws.
Chapter 4 – Maintenance
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