Black Box Fiber Meter Manual page 41

FIBER METER
To set IOR:
1. Set the rotary dial on the Main Unit to CAL.
2. Press the up- and down-arrow keys until IOR is
highlighted.
3. Press the F4 button to calibrate IOR. Figure 4-1
appears.
4. Select one of the following responses:
• Press the F4 button to use the default setting.
• Press the F2 button to manually change the IOR to
a number that is less than the default setting. Press
the F3 button to change the IOR to a number that
is greater than the default setting.
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Figure 4-1. Setting IOR.