Vaisala HMW90 - Manual (Page 65)

Chapter 4 _________________________________________________________________ Operation
VAISALA ________________________________________________________________________ 63
Test Relay Operation
Use the command RTEST to test the operation of the relay. Issue the
command without parameters to end the relay test.
RTEST [state]
where
state = State of the relay contacts. Options are:
open (open the relay contacts)
closed (close the relay contacts)
Example (close relay contacts):
>pass 9000
>rtest closed
Relay test mode : Closed
Example (exit relay test mode, resume normal operation):
>rtest
Relay test mode : Canceled
Other Commands
Enable Advanced Serial Commands
Use the PASS command to enable the advanced serial commands.
PASS [passcode]
where
passcode = Passcode to enable advanced commands is 9000.
Example:
>pass 9000