Rion VM-55, Instruction Manual, Page: 135 / 204

123
Optional Accessories
7. Adjust the level control (Level adj) of the level recorder so that the
pen registers the top of the scale.
8. Press the CAL key once more to return the VM-55 to the measurement
mode.
9. Use the Lv/Lva key to display the screen for the output signal selected
with the [Freq] setting.
10. Use the LEVEL RANGE key to set the level range. Make the setting
so as to avoid overload and under-range conditions (as indicated by
the OVER and UNDER indications).
The upper limit of the level range selected for the VM-55 becomes
the scale upper limit of the level recorder.
For example, when the level range upper limit is set to 100 dB, the
scale upper limit will correspond to 100 dB. In this case, if the re-
cording range of the level recorder is 50 dB, the scale lower limit
will correspond to 50 dB.
Program options
The unit can make use of a range of program options.
For details on usage, refer to the documentation supplied with the respective
program.
Note
Once the Extended Function Program VX-55EX
has been installed, it can no longer be uninstalled.
Scale upper limit
Recording pen
When recording range is 50 dB