OptoTest OP831 Instruction Manual page 8

OP831
Definition of Specifications
Recommended Recalibration Period
This is the recommended time period for re-calibration in order to maintain accuracy
specifications. The recommendation is made based upon statistics on detector aging;
however it is up to the metrology policies and procedures within each company to
define the calibration cycles on optical power meters.
Optical Power Meter, Fiber Compatibility
The amount of aerial coverage of the detector, or the portion of the light emitted from
the fiber being measured, depends on the mechanical features of the optical interface,
the active area of the detector and the numerical aperture (NA) of the fiber. A fiber with a
large NA, for example 100/140 multimode fiber, might not under fill a small area detector
hence the absolute power reading will be less than actual.
Instrument, Environmental
Operating Temperature: This is the temperature range in which the instrument will
conform to the specifications after the specified warm up time.
Storage Temperature: This is the temperature range at which the instrument can
be stored with the power off without any damage or any loss of specification to the
instrument. It is required that the instrument be brought back to within the operating
temperature range before it is turned on.
Humidity: The relative non-condensing humidity levels allowed in the operating
temperature range.
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