EXFO IQS-12002B Calibration System User Manual
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Introducing the IQS-12002B Calibration System
5
Calibration and Verification: Assessing Conformity
The Concepts behind the IQS-12002B Calibration
System
The IQS-12002B Calibration System is used to verify and/or adjust a DUT
(device under test) of a certain type (e.g., FPM-300) and of a certain model
(e.g., FPM-302X). The application keeps a history of each tested device.
To test a device, the system needs various instruments such as sources,
power meters, fiber spools, etc. In the system, there may be several
instruments of a given type and model. By default, the system uses the first
instrument available, unless you specify one.
Some of the instruments are considered as “standards”, for which the
system keeps an history. Since the system relies on the accuracy of these
standards, you must respect the recommended calibration frequency. The
system does not allow tests with a standard that is due for calibration.
To test a device, the application will need a test sequence. This test
sequence consists in several substeps identified as “scenarios”. A scenario
is based on a general procedure (e.g., insertion loss) that it adapts with
particular specifications for a particular DUT model (e.g., variable
attenuator insertion loss at 1310 nm).
The specifications are the different values the application uses to
determine the compliance of a DUT. For certainties compliant with
ISO 17025, there are four possible collections when assessing conformity:
³
Inside specifications
³
Inside specifications*
³
Outside specifications*
³
Outside specifications
Note: Please refer to the section Conformance Assessment of the Unit Status for a
Certificate Compliant with ISO 17025 for further details on verification of a
device when taking into account measurement uncertainties.