Olympus 45MG User Manual page 138

DMTA-10022-01EN, Rev. C, January 2015
The units and resolution of the differential thickness are the same as those selected for
the thickness measurement.
When you press [SAVE] (with the optional datalogger) while in the NORMAL or
% RATIO differential modes, the 45MG saves the actual thickness value along with
the "D" flag indicating that the Differential mode is active.
To activate and configure a differential mode
1. In the measurement screen, press [SETUP], and then select DIFF.
2. In the DIFF screen (see Figure 7-2 on page 129):
a) Set DIFF ENABLE to ON to activate the differential function.
b) In DIFF MODE, select one of the three differential modes:
• NORMAL: Shows the actual thickness, along with the difference between
the actual thickness measurement and the REF VALUE entered.
• % RATIO: Shows the actual thickness along with the percent difference
from the REF VALUE entered.
• REDUCTION RT: Shows the actual thickness, in addition to the percent
difference between the actual thickness and the former value. The former
value is the thickness of the metal prior to the bending process. Use this
mode for metal bending, or any other application in which you need to
track the percentage of wall thinning.
c) When DIFF MODE is set to either NORMAL or % RATIO, enter the
reference value in the REF VALUE text box.
128 Chapter 7
Differential =
Normal
Current thickness Reference value
-------------------------------------------------------------------------------------- -
Differential =
% Ratio
Current thickness Reference value –
–
Reference value
×
100