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LS 6000 Scintillation System User’s Manual
PN 247971-F
3-8
Counting Samples
Auto DPM
The Main Editing Window then prompts you to load your samples and initiate counting by
pressing START again. Refer to Section 5.9 for more information on Single Photon Monitor.
5. The sample(s) are counted and the results printed. Figure 3.7 shows an example of a
resulting printout from Count Single Rack using a User Program. The Main Menu is
displayed.
3.4 Auto DPM
Auto DPM allows you to obtain dpm values for singe label 14 samples labeled with a pure
beta-emitting Isotope (I.e.
3
H,
14
C,
32
P,
35
S,
45
Ca, or
86
Rb) without running quench curves.
Auto DPM can be initiated from a Command Card. This program uses default parameters set
by the instrument. The count time and counting precision may be set under System
Parameters. Refer to Color Selection - Monitor Section 2 for more information on setting
these parameters.
Auto DPM may also be selected as a Data Calculation Program and initiated with a User
Number Card. The parameters set in the User Program are used to count the samples. Refer
to Section 5.4 for more information on using Auto DPM as a Data Calculation Program.
NOTE Auto DPM is designed for use with liquid scintillators only. Using this operating mode for counting
samples on Xtalscint products may give erroneous results.
Auto DPM Calibration
Auto DPM Calibration is performed at the factory and the calibration stored. The calibration
data is stored under System Setup. Verify that the calibration data stored in System Setup
agrees with the unquenched
3
H and
14
C standards of your instrument. Refer to Color
Selection - Monitor Section 2 for verifying the data under System Setup.
It is recommended that you perform Auto DPM Calibration only when you receive the
instrument and do not change it. The Calibrate Rack is used to perform Auto DPM
Calibration. Place the unquenched
14
C standard in position #1 and the un-quenched ~
standard in position #2. The instrument first performs calibration and then when a second
vial is detected in position #2, the system backs up to the ~ standard and performs Auto DPM
Calibration.
Figure 3.7 Typical Printout from Count Single Rack
- 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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