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Specification
3-2
SAM12 User Manual
Operational Parameters
See
Params 1 (page
5-8),
(page 5-11)
for information regarding the settings and defaults
for the Operational Parameters.
Software Options
See
Options (page 5-6)
and defaults for the Software Options.
Vault Options
See
Doors (page 5-13)
and defaults for the Vault and Door Options.
Default Messages
See
Messages (page 5-15)
settings and defaults for the Software Options.
Background Capability
Background capability is related to alarm threshold and
statistical certainty requirements. Background subtraction is
included in the measurement routines for the detectors. When
the isotope of interest is of low energy level, the energy
window can be changed to lower the background count rate
thus allowing greater statistical certainty (see
5-28)
and
Selection of Detector Operating Parameters (page 9-
3)).
The mean background count rate for use in measurement
calculations is accumulated from a series of 10 second counts,
with a maximum of 10 results stored at any one time. The
mean background count rate is therefore based on a 100 second
count, which is maintained on a "rolling average" basis.
A significant change in the measured background count rate
from the mean will cause the SAM12 to discard the current
mean value and restart background monitoring (see
Background (page
6-5)).
If, due to heavy use, the SAM12 has been unable to measure
background for 15 minutes, a 1 second background count is
performed immediately after the current monitoring sequence.
If no significant change is detected, the machine will be
available for further monitoring. If a change in background is
detected, further background measurements are performed until
Params 2 (page 5-10)
for information regarding the settings
for information regarding the settings
for information regarding the
Issue: 1.0
and
Params 3
Hv Power (page
Changing
Thermo Fisher Scientific
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Table of Contents
Troubleshooting
