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Maintenance Procedures
ISO and other accreditation purposes.
In order to properly analyze CRM’s in the ORACLE, it is essential that these samples be conditioned in a CEM
High Precision Heater Block at the temperature designated on each individual heater block for 45 minutes prior
to analysis. CRM’s that are 12% moisture and higher should be dried in an air or vacuum oven following certified
procedures prior to conditioning in the CEM High Precision Heater Block.
CRM’s can be sourced from a variety of laboratories worldwide. CEM recommends sourcing these samples from
Muva Kempton in Germany or LGC, a worldwide company. For more information on sourcing CRM’s or contact
information for CRM providers, please send an email to [email protected].
Short Term Stability
The Short Term Stability test measures the peak to peak difference of signal amplitude (of a Normalization
Standard) over the course of approximately 4 hours. The purpose of this test is to confirm the internal components
of the magnet are performing optimally, as well as to check for any environmental interference.
CAUTION
This test should only be run if instructed by CEM Service personnel as the ORACLE magnets are highly
stable and should not drift over time.
Long Term Stability
The Long Term Stability test measures the peak to peak difference of signal amplitude (of a Normalization
Standard) over the course of approximately 14 hours. The purpose of this test is to confirm magnet performance
over an extended period of time and determine any possible trends in external interferences (ie. power,
temperature, EMF, etc).
CAUTION
This test should only be run if instructed by CEM Service personnel as the ORACLE magnets are highly
stable and should not drift (resulting in in-homogeneity) over time.
