STABILITY MONITORING SYSTEM 

Reliable, Process Lab analyzer spectrometer 

Turnkey system includes the spectrometer, one or more NIR probes, fiber optic cables, and scanning and analysis software 

STABILITY MONITORING SYSTEM (SMS)

  • SMS is included standard with the LAB NIR-O
  • SMS is an optional added component for Process NIR-O

SMS VALIDATION DETECTS CHANGES IN PERFORMANCE

The performance tests identified in the ASTM practice are diagnostics that can be used to detect changes in analyzer performance. This validation provides assurance that the measurement produced by the analyzer is a result of equipment that is operating properly. Since this is a hands-off procedure, it can be conducted in the background with no human intervention. The validation is done with an internal filter having a characteristic spectral signature. There are no liquids or other external sampling modes that are necessary.

TESTS IMPLEMENTED IN GUIDED WAVE’S SMS PACKAGE: LEVEL 0

  1. Photo metric noise level
  2. Peak location (wavelength stability)
  3. Baseline stability level
  4. Bandwidth
  5. Photo metric linearity

    For a complete range of applications, system options, and service, please contact us.

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    Full Spectrum NIR Laboratory Analyzer with Real-Time Monitoring and High Sensitivity

    Process Insights_guided wave- NIR-O_process analyzer

    TYPICAL VALIDATION PROCESS

    A flow chart depicting a typical SMS level 0 validation flow diagram is shown in Figure 1. Guided Wave’s SMS operation is seamlessly integrated into the OmniView control software or OmniLab for LAB NIR-O. SMS provides assurance that all of the ASTM required measurements are conducted at the appropriate time and will send a signal or message to the control system if a validation issue is encountered

    ANALYZER PERFORMANCE TESTS

    This topic is addressed in ASTM practice D-6122-191 under instrument performance tests. The ASTM practice provides a set of criteria for establishing baseline analyzer performance validation. Three levels of hardware testing are established:

    • Level O
      – Tests the analyzer hardware’s capability to generate a consistent spectrum. This is accomplished by measuring photo metric noise, baseline stability, spectral resolution,  photo metric linearity, and wavelength stability.
    • Level A
      – Tests compare key parts of the spectral data with historical data to identify deviations.
    • Level B
      -Tests and monitors the instrument performance for deviations that affect the system calibration models.

    LEVEL A

    This is a pass/fail performance test that is sensitive to all of the Level 0 parameters. Level A tests do not identify specific failure modes, but do indicate if the instrument performance is within historical bounds. In this test, the spectrum of a check sample (or an optical filter) is compared to a historical spectrum of the heck sample.

    LEVEL B

    The level B tests analyze the spectrum of the SMS filter against the models in use on the analyzer system. This monitors for deviations to which the calibration model is sensitive. The results are compared to historical values to detect any change in the analyzer performance.  Note: The level B tests are not automatically part of the SMS because they require the customer’s unique calibration models, which Guided Wave may not have. Guided Wave can assist customers in implementing Level B tests as part of\ their SMS installation.

    1 ASTM D6122-19 Standard Practice for Validation of the Performance of Multivariate Online, At-Line, and Laboratory Infrared Spectrophotometer Based Analyzer Systems, ASTM International, West Conshohocken, PA, 2019 www.astm.org


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