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LS 6000 Scintillation System User’s Manual
PN 247971-F
5-14
Data Calculation
Xtal DPM
Standard Date
Standard Date is used to correct the dpm of the standard for half-life decay. This date is given
by the manufacturer on the label of the isotope container used to make the Xtalscint
Standard. If a date is not entered here, the standard dpm is not corrected for half-life.
To enter the Standard Date, highlight “Standard Date”, and enter the date in this format: dd
mmm yyyy (2 digits for day, a 3 letter code for the month, and 4 digits for the year).
Units
Units allows you to enter units or any name you want printed as the final results. This name
is used in place of the DPM heading in the printout.
To change the setting, highlight “Units” and enter in the desired name using up to
5
characters.
Loading Samples for Xtal DPM
Since the instrument has no way of distinguishing among blanks, standards, and unknowns, a
convention has been established for identifying them by the sequence in which they are
loaded. An example loading sequence is shown in Figure 5.12.
If blanks are specified in the User Program as described in Background/Blank Subtraction
Section 4, the blanks must be loaded first. Blanks are optional. Any number of blanks may be
used. The average is printed. Leave an empty space between the last blank and first standard
dpm; this indicates to the instrument that the next vial encountered is a standard.
Load the standard dpm after the empty space. One to ten standards may be loaded for each
isotope. If more than one dpm standard is used, the system computes the average. Leave an
empty space after the last dpm standard, signalling the instrument samples follow.
Load the samples after the empty space. If you are using replicates, the replicates must be
loaded in adjacent positions. To indicate that one or more of replicates are missing from a
group, leave one empty position; the system recognizes the vial following the empty space as
being the first of the next set.
Figure 5.12 Loading Sequence for Xtal DPM
- LS 6000 Series 1
- Table of Contents 3
- Introduction 11
- Principles of Operation 12
- Operating the Instrument 12
- Operating Modes 13
- 1.3 Specifications 14
- Precautions and Limitations 15
- Figure 1.1 Standard Vial 15
- Miniature Vials 16
- 1.5 Hazards 17
- Maintenance 18
- Getting Started 19
- 2.2 Power Failure 21
- 2.3 Operating Controls 21
- Operator Control Key pad 22
- Using the Operating Controls 24
- 2.4 Using the Racks 25
- Using the Racks 26
- Setting Up the Racks 27
- 2.5 Preparing the Printer 29
- 2.6 System Setup 30
- Energy Scale 31
- Printer Paging 32
- Allow Interrupt Count 32
- System Setup 33
- Figure 2.9 RS232 Setup Menu 33
- Date/Time 35
- Auto DPM 35
- 2.7 Calibration 36
- Counting Samples 39
- Starting the Automatic Count 40
- Conducting Count Single Rack 41
- 3.4 Auto DPM 46
- 3.5 Multi-Task 47
- Interrupt Count in Multi-Task 48
- Multi-Task 50
- Interrupt Data 51
- Setting Up User Programs 59
- 4.2 Editing A User Program 61
- Editing A User Program 62
- Comments 65
- Counting Time 65
- Liquid or Xtal Scintillator 65
- Isotope 1 65
- Isotope 2 and Isotope 3 66
- Edit Other Parameters 67
- Counting Precision 69
- Background/Blank Subtraction 69
- Lum-Ex Correction 71
- Phase Monitor 72
- Low Level 72
- Low Count Reject 72
- Output Formats 72
- Count Data 75
- Raw Data 75
- Collecting Spectral Data 76
- 4.3 Copy User Program 77
- Copy User Program 78
- 5.2 CPM/Xtal CPM 80
- CPM/Xtal CPM 81
- Results for CPM/Xtal CPM 83
- 5.4 Auto DPM 85
- Setting Up Auto DPM 86
- Loading Samples for Auto DPM 86
- Results for Auto DPM 86
- Setting Up DPM 87
- 5.6 Xtal DPM 89
- Xtal DPM 90
- Setting Up Xtal DPM 91
- Loading Samples for Xtal DPM 92
- 5.7 DPM % of Reference 93
- Setting Up DPM % of Reference 94
- Xtal SL DPM % of Reference 95
- 5.9 Single Photon Monitoring 98
- Data Calculation 100
- Single Photon Monitoring 100
- Isotope/DPM Libraries 103
- Accessing the Isotope Library 104
- Printing the Isotope Library 104
- The Isotope Library 105
- Setup Menu 106
- PN 247971-F 108
- 5 minutes 109
- 6.2 Setting Up A Quench Curve 110
- Setting Up A Quench Curve 112
- Counting the Standards 114
- Editing Quench Curves 120
- Deleting A Quench Curve 124
- Manual Entry of Quench Curves 125
- 7.1 Chemiluminescence 127
- Interpretation of Results 128
- Reducing Single Photon Events 128
- 7.3 Two Phase Samples 129
- Procedures 131
- Analysis of Data 131
- H Counting Efficiency 132
- C Counting Efficiency 132
- Background 133
- Contamination 133
- Instrument Specifications 135
- Temperature Control Accessory 138
- Installation Requirements 139
- Electrical Requirements 140
- 0.5 to 1.0 m in 140
- Environment Requirements 142
- . Note that the output 144
- Datum IDs 146
- CHAPTER 1, PART 31 167
- Region I 170
- Region II 170
- Region III 170
- Region IV 170
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