Thermo Scientific SAM12, Руководство пользователя

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Issue: 1.0 Operating Instructions
Thermo Fisher Scientific SAM12 User Manual 5-9
Select Set-Up|Params1 to
customise the first set of
Operational Parameters:
Description of options:
Field Name Description
Low- Background
Alarm (cps) If a background measurement falls below this value
(counts per second), a detector failure will occur.
Values: 0 to 99,999 cps (0 to disable)
Default: 50cps
Gross Changing
Background (
σ )
This statistical variable is used by SAM12 to
determine if a changing background condition exists
on all detectors.
Values: 0.1 to 7 sigma in 0.1 sigma steps
Default: 5
σ
Detector Changing
Background (
σ )
This statistical variable is used by SAM12 to
determine if a changing background condition exists
on a single detector.
Values: 0.1 to 7 sigma in 0.1 sigma steps
Default: 7
σ
Changing Conditions
(
σ )
This statistical variable is used by SAM12 to
determine if a changing measurement condition
exists.
Values: 0.1 to 7 sigma in 0.1 sigma steps
Default: 7
σ
Changing Conditions
Period (s) This is the length of time used by SAM12 to
determine if a changing measurement condition
exists.
Values: 2 to 30 s
Default: 3 s
RCC Contamination
Threshold (
σ )
This is the statistical increase during a Residual
Contamination Check compared to the background
measurement.
Values: 0.1 to 7 sigma in 0.1 sigma steps
Default: 7
σ
Calibration Check
Accuracy (%) This is the required accuracy to which the
calibration is carried out.
Default Calibration
Source Use the pre-defined window to select a default
source. For a list of Sources, see
Cal Check (page
5-19) .
Values: from source database
Calibration Required
Interval This is the number of days since that last calibration
date before the unit needs to be calibrated again.
See
Out of Calibration (page 5-48) to view the