The Hach WIMS Direct Server-Side Interface to Hach UDG1000 (Q14088) relies on a UDG1000 Cross Reference Parameter GUID.
When using the browser, on the WIMS Variable/Interface tab, there may be many GUID's listed.  
To find the current GUID's being used by UDG1000 use the following:
1.  Download and install the latest version of PG Admin III.
2.  Log into PG Admin III as User postgres, see Internal Passwords for login info.

3. Browse to OutputCrossReferences: (localhost:56298)/Databases/udg1k/Schemas/public/Tables/OutputCrossReferences

4. Right click on OutputCrossReferences.  Go View Data/View All Rows.

5.  You will now have a list of GUID's that can be Cross Referenced in WIMS. Id uuid is the GUID.
