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LS 6000 Scintillation System User’s Manual
PN 247971-F
1-3
Introduction
General Description
1
stepped into position for processing. In turn, each vial is raised by the elevator into position
within the counting chamber and counted.
Instructions for processing samples, as well as other operating and system commands, are
entered using the keyboard on the front of the instrument. A series of menus is displayed on
the monitor to guide you through the process of setting up the programs used by the system.
During processing, the display screen shows details on the progress of the count. Results of
the sample processing are printed out on the printer and/or sent to the RS232 port.
Operating Modes
The instrument has the following operating modes:
Automatic Count
This mode is ordinarily used for counting a batch of samples unattended. Any one of the
20-50 stored User Programs can be selected for conducting the count. Refer to Section 3.2 for
more information.
Multi-Task
Operation during an Automatic Count can be interrupted to count up to one rack of priority
samples, to edit a User Program, or to manually set up a new isotope or new quench curve (if
dpm is installed). Refer to Section 3.5 for more information.
Count Single Rack
This mode allows you to count a few samples (up to one rack) quickly using a default
program or a previously stored User Program. Refer to for more information.
Auto DPM
This mode allows you to obtain dpm results for single label, alpha- or beta-emitting samples,
without using quench curves. Refer to Section 3.4 for more information.
Edit User Program
This mode allows you to edit any of the 20-50 User Programs to set up the instrument for
counting liquid scintillators or Xtalscint and to set up the desired Data Calculation Program.
Refer to Section 4 and Section 5 for more information.
Set Up New Isotope
This mode allows you to add a new isotope to the Isotope Library. The Isotope Library
contains the window settings and half-life for the isotopes called up by the User Program for
both liquid and Xtalscint scintillators. Five factory installed isotopes are permanently stored
in the Isotope Library. Refer to Section 6.1 for more information.
Set Up Quench Curve
When dpm is installed, another operating mode is used to set up and store a dpm quench
curve into the DPM Library. Each isotope must have a stored quench curve to calculate dpm,
unless using Auto DPM or Xtal DPM. Refer to Section 6.2 for more information.
- 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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