
LS 6000 Scintillation System User’s Manual
PN 247971-F
2-10
Getting Started
Using the Racks
To set up the Calibrate Rack, select one of the standard or miniature racks, depending on the
size of your unquenched standards. If the instrument is ordered as a Miniature Rack System,
the unquenched calibration standards supplied with the instrument are miniature vials. If the
instrument is ordered as a Standard Rack System, the unquenched calibration standards
supplied with the instrument are standard vials. The size of the colored racks matches the size
of the calibration standards.
Install the Auto Calibrate Card as a Command Card. Refer to Installing Cards Section 2
above. Turn the rack around, and place the sealed, unquenched ~ standard in the #1 position
of the rack. Only the first sample in the rack is counted during calibration,
except when
calibrating for Auto DPM. Place
the other two sealed standards in the same rack. Although not used
for calibration, these samples are required for other procedures and this is a useful place to store them.
NOTE The 3H standard is used for calibrating the system for Auto DPM. Refer to Section 2 Auto DPM for
more information on Auto DPM.
Halt Rack
The Halt Rack is a rack bearing the Halt Card. The Halt Rack is placed after the last rack of samples. It
does not contain any samples. The instrument recognizes the Halt Rack and stops counting. Refer to
Section 2.4 for information on using the Halt Rack.
To set up the Halt Rack, select the red rack provided
and insert the Halt Card as a Command Card onto
the rack as described above.
Interrupt Rack
The Interrupt Rack is the rack bearing the Interrupt Card. The Interrupt Rack with the Interrupt Card
installed on it will not be counted during Automatic Count when it is left in the instrument, unless
Interrupt Count is initiated from Multi-Task. Refer to Section 2 Setting Up the Racks for information
on using the Interrupt Rack.
To set up the Interrupt Rack, select the yellow rack and insert the Interrupt Card as a Rack
Number Card onto the rack as described above.
NOTE The Interrupt Rack does not have a Command Card in-stalled. The Interrupt Card is a Rack Number
Card.
Auto DPM Rack
The Auto DPM Rack is a rack bearing the Auto DPM Card. The Auto DPM Rack is used to
initiate the Auto DPM Program. Refer to Section 2 Setting Up the Racks for information on
using the Auto DPM Rack. To set up the Auto DPM Rack, select a miniature or standard vial
rack and insert the Auto DPM Card as a Command Card onto the rack as described above.
Place a Rack Number Card on the rack as described above, if desired.
Sample Racks
Up to 50 different User Programs can be stored in the instrument and called up during
Automatic Count using the User Number Cards 1
— 50. The first rack of each batch of samples
has the appropriate User Number Card installed on it. The first rack and the remaining
Sample Racks can have a Rack Number Card installed on them to provide positive sample
identification. It is convenient to install the User Number Cards and the Rack Number Cards
you anticipate using onto the racks and leaving them there.
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