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LS 6000 Scintillation System User’s Manual
PN 247971-F
c-2
RS232
RS232 Data Output
When XOFF is received, data transmission stops until an XON is received. Data transmission
starts automatically after 30 minutes have elapsed unless XON is sent prior to that time. If the
printer is not ON after the 30 minute time out, the LS counter itself stops.
There is no ACK/NAK (acknowledge/no acknowledge) or re-transmit protocol in the data
output mode.
CTS and DTR are used as handshake lines as summarized in Figure c.1
. Note that the output
lines DSR and DCD are always held high by the LS.
c.3 RS232 Data Output
General Format of Messages
The basic unit of transmission is a message of up to 96 characters terminated by a carriage
Return-Line Feed (CR,LF). Each message contains a code to identify the type of message
being sent. If the message contains data, each data item is coded to identify the particular
datum being sent followed by its actual value. The actual value may be boolean, an integer, a
real number or text depending upon the specific datum.
RS232 Session: Definition and Message Format
The LS signals the start of any operation that involves RS232 transmission by sending a Send
Initiate message, message Type S. If the LS is terminating RS232 transmission, then it sends a
Break Transmission message, message Type B. These messages require no response by the
external device. The period between Send Initiate and Break Transmission messages is called
an RS232 Session.
During an R5232 Session involving Output, a specific format is used for messages as given
below.
<Message>
= <SOH> <Length> <Sequence Number><Message Type>{<Data
Item>{<Seml-colon> <Data Item>}) <Checksum> <CR> <LF>
where <Data Item>
= <Data ID> <Data Type> <Space> <Data Value>
Each item of the message is explained in the following para-graphs.
<SOH>, Start of Message
<SOH>
= Control-A (Hex 01 or ASCII decimal 1)
8* DCD Signal Ground
20 DTR Output
*These lines are held high by
the instrument.
Input (Handshake)
Figure c.1 RS232 Pin Designation.
Pin Number Signal Name Direction
- 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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