F3 – Setup Menu
Gem-5 User’s Manual 139
Ctrl+F6 = Load CALIB.INI Source List: replaces the current Calibration Source
List with the master calibration source list from the CALIB.INI file. Prior to using the
factory installed sample CALIB.INI file it must be modified for the sources in use at
the facility, as discussed above.
Ctrl+F7 = Recall Previous Settings: reloads list from CALIBSRC.DF. This has the
effect of “Undoing” any changes made since the beginning of the current Edit
Calibration Source List session, including all Add, Delete and Edit operations. Note
that this can affect data for sources in the list other than the one currently displayed.
Esc = Return to Setup Detection Zones Menu: Saves all edits and returns to the
Detection Zones menu. The CALIBSRC.DF file is updated to reflect any changes
made during the current Edit Calibration Source List session. By default, a new
CAL_LIST.TXT file (see Calibration Source List Printout screen on page 265) is
created in the DATALOG directory if any changes were made, overwriting the
previous version of the file, if it exists. Auto-saving of the Calibration Source List
Printout file is set up in the Printout screen. This is one of the files periodically sent
to the central history computer or to the mapped network drive when the F9- Data
Transfer (Network) Setup is configured.
Line Items
Sources in List: The number of sources in the Calibration Source List. This number
is affected by the “Add” (F1) and “Delete” (F2) keys.
Edit Source: Indicates the source number currently selected. Use PgDn and PgUp
keys to select a different source for editing.
Source ID: Up to fifteen characters can be entered to uniquely identify the source
(serial number, registry number, etc.). The serial number on its calibration certificate
is often used.
Note: There are two validation checks applied when leaving this screen: If
duplicate Source IDs are found, the first instance is kept and the remaining
instances are deleted. Any blank Source ID entries found are deleted.
Source Type: Enter the source type, if known. Options are α, ß, γ or blank. This
setting affects the emission rate units (see below).
Source Dimension: Enter the length and width (in cm) of the active surface of the
calibration source. The range is from 0 cm to 100 cm. These are usually recorded on
the source certificate. The source dimensions are used to convert between Bq/cm²
and Bq, etc. as specified in the F1 – Common Values screen.
Note: Use the special case of 1 cm x 1 cm to preserve the numerical value when
converting between units, for example a Gamma point source. The source
dimensions are also compared with the detector dimensions so that the source
area visible can be calculated automatically if the source is bigger than the
detector. The value of 0 for either dimension is a special case that forces the
source area visible to 100%. On exiting this screen (Esc) or switching to a
different source (PgDn or PgUp) the larger dimension is forced into the
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