Delta RetroSign GRX-1 User Manual page 39

You can swipe right to left to view all details of the inspection. See part: 'Understanding the
inspection' in the 'Log' paragraph for further details about the inspection.
Note: From the result view you can change to another series:
When changing to another series, data from the new series will be shown.
If a problem arises during the inspection, an error or warning will occur on the screen. For further
details, see section 4 - Errors and warnings.
MUTCD Library
The GRX uses the MUTCD library to identify the particular type of sign that is being inspected and to
check that the reflectivity of the sign is above the minimum maintain reflectivity level.
MUTCD (Manual on Uniform Traffic Control Device) is a national standard, which encompasses a
library of all national traffic signs in the United States.
During the use of the GRX, the instrument will ask you to choose the relevant sign type according to
the below table (source: http://mutcd.fhwa.dot.gov/pdfs/2009/mutcd2009edition.pdf, page 31)
39
RetroSign GRX User Manual / December 2017 DELTA