USER'S GUIDE  ____________________________________________________________________ 
150  __________________________________________________________________ M211187EN-C 
4.  Open transmitter/receiver head and remove end plug, use wrench 
size 13 mm. 
 
Figure 51  End Plug Removal (Shown for Transmitter) 
5.  Unlock transmitter/receiver module. 
-  Remove corresponding module retainer. 
 
   
Figure 52  Module Retainer Removal (Shown for 
Transmitter) 
6.  Screw the opening tool (Vaisala item DRW011133) into the rear 
plate of the transmitter/receiver module. 
7.  Pull the receiver/transmitter module carefully out of the head. 
-  Push the control cable from the center compartment side and 
pull the module further out until access to the control cable 
connector is possible. (Pull the receiver/transmitter module from 
the optics head while simultaneously feeding in the control 
cable). 
-  Receiver/Transmitter module is approximately 50% pulled out.