Vaisala WXT520 - Manual (Page 132)

User’s Guide ______________________________________________________________________
130 _________________________________________________________________ M210906EN-C
Replacing the PTU Module
1. Turn the power off. Loosen the three fixing screws at the bottom
assembly of the WXT520.
2. Turn out the top of the transmitter.
3. Release the small white latch (see section A in Figure 26 on page
130 ) and remove the PTU module.
4. Remove the vacuum bag protecting the PTU module. Connect the
new PTU module. Avoid touching the white filter cap with your
hands when handling the PTU module.
5. Turn the top back in. Make sure the flat cable does not get stuck or
squeezed between the top and the funnel for the flat cable.
6. Tighten the three fixing screws that fasten the top and the bottom.
To make sure that the radiation shield stays straight, do not tighten
the screws all the way in one go. Do not overtighten.
0602-013 Figure 26 Replacing the PTU Module