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Software

QuantaSmart

Password/username

LSC General Information

The detector should not be exposed to ambient light when powered on. 

It is best to operate the system with the lid closed.  If user is doing maintenance, ensure the detector is not powered on. 

A spike in background levels in the 0 to 4 kev channels may indicate a possible light leak.

  • There are flash drives inside the LSC that contain backups of the software and a hard drive image.  These would be used in case there is a malfunction with the system. Do not remove them from within the LSC.
  • Log in information:
    1. User account: User name: QuantaSmart; Password:QS (capital letters)
    2. Administrator account: No password
  • Once you select Assay type (CPM, DPM, etc.) you cannot change it.
  • Use SIS (spectral index of sample) for CPM measurements
  • DPM measurements take longer because they count against the barium first.
  • Vendor does not recommend using the ‘subtract background’ option
  • Leave the ‘Static Controller’ on in the Count Corrections tab
    1. Wiping vials with alcohol can help reduce static in dry environments
  • To use an assay: Right click on a flag on the left side of the window and select assign assay. Select the file and select OK.
  • DPM tests require the half-life in the Sample Nuclide Group Set up window
  • Replay can be used to reprint reports and make slight edits



Maintenance 

Before doing any maintenance on the detectors, ensure the detectors are powered off.  If the detectors are removed from the LSC for mantenance and cleaning, they should be covered.  The two black covers are stored within the detector compartment on the left hand side.

Recommended Maintenance for a system in normal operation (constant use):

  1. Clean the filter on the back of the LSC
  2. Check the elevator, annually
  3. Check the reflectors, annually
  4. Check the Pistons, may need to be replaced every year or 2

Possible spares/required parts:

  • Power conditioner (Recommend their Power Var system. Consumer APC Units not recommended.)
  • Back up battery (Comes with power conditioner, can be purchased separately. Will run LSC for a half hour if there is a power failure)
  • Spare elevator (can be replaced as long as user has a channel lock)
  • The vials must meet certain specifications. The lid cannot be wider than the vial or the vial may get caught in the LSC.

Terminology

  • IPA = Instrument Performance Assessment
  • SNC = Self Normalization Calibration
  • IPA and SNC are the same. These both refer to the calibration procedure.  The IPA menu is used to setup the calibration procedure.  The SNC flag is used to mark the rack in the LSC that is set up for the calibration.
  • Assay:
  • Protocol:

File Structure

All files and software for the LSC are stored in the C:\\Packard folder on the PC.  There are no files stored in the Program Files folder.

Calibration Files:

Measurement Files:

Where to set file path

Running a Calibration

The LSC should be calibrated weekly if the system is being used constantly.  If the system is used only occasionally, then a calibration should be run prior to any measurements.

A full calibration procedure takes an hour and 15 minutes.  The 14C and 3H measurements take a total of 15 minutes while the background measurement takes 1 hour.

  1. Load the standards in the appropriate locations on the rack labeled with 14C, 3H, and BKG.  
  2. Place the SNC Flag on the rack
    1. Make sure the sliding tab is all the way out toward the left or the LSC will think the run is completed and will not measure the standards.

Standards in rack with SNC flag (protocol) set up for a run.  Note the flag is all the way to the left.

       3. Open the IPA menu

       4. Verify the DPMs for each standard. Update if necessary.

                a. Each standard is labeled with the DPM information.  This information should only need to be updated if using a new standard.

      5. Select Ok (or apply ...CHECK THIS)

      6. Select the SNC assasy from the left side of the window

      7. Select the Green flag at the top left side of the window

      8. Calibration will begin to run

Creating an Assay

  • Program has 30 protocols or assays. These can only be deleted from the C:\\Packard folder manually.  A user cannot delete an assay from within QuantaSmart
  • To use an assay: Right click on a flag on the left side of the window and select assign assay. Select the file and select OK.

Starting Measurements

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