User's Guide _______________________________________________________________________ 
8  ____________________________________________________________________ M211659EN-C 
Version Information 
Table 1  Manual Revisions 
April 2016. This manual. Updated sections: 
-  Transmitter Parts on page 15. 
-  Configuration of Analog Output Models on page 19. 
-  Selecting Location on page 24. 
-  Effect of Pressure on CO
2
 Measurement on page 
65. 
-  Replacing the GM10 Module on page 70. 
-  Technical Data on page 80. 
-  Modbus Reference on page 97. 
April 2014.Previous version. Added transmitter models 
with analog outputs. Updated BACnet reference 
November 2013. First version. 
Related Manuals 
Table 2  Related Manuals 
HMW90 and GMW90 Series Quick Guide for 
Digital Output models 
HMW90 and GMW90 Series Quick Guide for 
Analog Output models 
Decorative Cover Quick Guide 
Decorative Cover Printable Insert 
 
Documentation Conventions 
Throughout the manual, important safety considerations are highlighted 
as follows: 
WARNING 
Warning alerts you to a serious hazard. If you do not read and follow 
instructions very carefully at this point, there is a risk of injury or even 
death. 
 
CAUTION 
Caution warns you of a potential hazard. If you do not read and follow 
instructions carefully at this point, the product could be damaged or 
important data could be lost. 
 
NOTE 
Note highlights important information on using the product.