Chapter 3 ________________________________________________________________  Installation 
 
VAISALA ________________________________________________________________________ 19 
CHAPTER 3 
INSTALLATION 
This chapter provides you with information that is intended to help you 
install the GMW90 series transmitters. 
Configuration Before Installation 
If you need to change the settings of the transmitter, it is best to do this 
before it has been installed. Available configuration options are different 
for analog output models (such as GMW93) and digital output models 
(for example, GMW95). 
Configuration of Analog Output Models 
You can configure analog output models of GMW90 series transmitters 
in two ways: 
-  Using the DIP switches on the component board. See section DIP 
Switches of Analog Output Models on page 20. 
-  Configuring the settings in software through the service port. See 
connection instructions and serial line commands in Chapter 4, 
Operation, on page 31. 
These two configuration methods are mutually exclusive. If the DIP 
switch configuration is used, software settings have no effect on settings 
that are controlled by the DIP switches. Additionally, standard analog 
output settings and display configuration are always set in the DIP 
configuration mode. DIP switch number 8 is the master switch that 
controls which configuration method is used. 
NOTE 
Software version 1.3.1 for analog output models introduced an exception 
to this. 
If you have used the AOVER command to configure the behavior 
of analog outputs when the measured value is outside the scaled
 output 
, your AOVER configuration remains even in DIP switch 
. See Set Output Clipping and Error Limit on page 45.