Model 871A User’s Manual USING THE LASER WAVELENGTH METER
Bristol Instruments, Inc. 22
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• Autoscale Axes – Automatically and continuously expands the x and y axes
of the Trend Graph as necessary to fit the updating trending data into the
display area. Autoscale Axes is only available on the Trend Screen, and
appears grayed out on the Wavelength Screen.
• Spectral Unit – Allows the user to select the measurement unit for the
Wavelength, Trend, and PID Screens.
- nm-vac – Sets the measurement unit to nanometers (vacuum values).
- µm-vac – Sets measurement unit to micrometers (vacuum values).
- GHz – Sets the measurement unit to gigahertz.
- THz – Sets the measurement unit to terahertz.
- cm
-1
-vac – Sets the measurement unit to wavenumbers (vacuum
values).
NOTE: In other scientific publications, the units of nanometers, micrometers,
and wavenumbers may refer to the values in an air, standard air, or vacuum
environment. The 871 Laser Wavelength Meter provides measurements as
values in a vacuum environment, and units that are dependent on
environment are given a “-vac” suffix to emphasize this fact.
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