Bnc SAM 935 Portable Gamma Spectroscopy System Manual de usuario Pagina 65
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SAM 935™ Instruction Manual 61
8. Specifications
Preamplifier
Type: Charge Sensitive
Input: Negative Current (anode)
Gain: -5 mV/pC
Amplifier
Type: Pseudo-Gaussian
Shaping: Bipolar, 3 µsec peaking time
Coarse Gain: 1x, 2x, 4x, 8x
Fine Gain: 1.000 to 2.550 in steps of approximately 0.0006
Int. Non-Linearity: < ± 0.1 %
Gain Instability: < ± 0.02 % / °C
Initial Offset: < ± 20 mV adjustable to zero
Offset Instability: < ± 20 µV / °C
ADC
Type: Base Converter 14-bit Successive Approximation
Conversion Modes: Linear - 256, 512, 1024 Channels
QCC - 256, 512 Channels (U.S. Patent 5,608,222)
Diff. Non-Linearity: Linear Mode ( < ± 1.0 %)
Integral Non-Linearity: Linear Mode ( < ± 0.1 %)
Temp. Stability
Gain: < ±0.01 % 20 °C ± 10 °C
Zero: < ±0.01 % 20 °C ± 10 °C (of full scale)
LLD: 0 to 105% of full scale digitally adjustable in .1% intervals
ULD: 0 to 105% of full scale digitally adjustable in .1% intervals
Zero: -5 % to + 5% of full scale, digitally adjustable
Controller
Processor 80C186 microprocessor at 20 MHz
Display 240 X 128 high contrast black-and-white FSTN graphics with CCFL
backlight
Controls 10-key custom keypad utilizing software programmable function keys
I/O DB9M RS-232 port for printer or computer connection
Clock Battery-backed-up clock calendar
Memory All programming in EPROM, 768K battery-backed-up RAM for data and
parameters
Power
Power Internal battery pack; external factory-supplied dual mode supply/
charger, 12w
Internal Detector (if present)
Voltage: 0 to 1200 Volts in 1-volt steps
Current: 1250 uA max
Temp Stability: < ± 0.01 % / °C
Ripple: < 50 mV peak-to-peak
Neutron Detector (if present)
Voltage: 0 to 1200 Volts in 1-volt steps
Current: 1250 uA max
Temp Stability: < ± 0.01 % / °C
Ripple: < 50 mV peak-to-peak
- Instruction Manual 1
- WARRANTY 2
- Table of Contents 3
- 2 SAM 935™ Instruction Manual 4
- 1. Introduction 5
- 1.2 Quick Reference 7
- 4 SAM 935™ Instruction Manual 8
- SAM 935™ Instruction Manual 5 9
- 2. Connecting Hardware 10
- SAM 935™ Instruction Manual 7 11
- 3. Configuring the SAM 935 12
- SAM 935™ Instruction Manual 9 13
- 3.2 Recalibration Procedure 14
- TIL key 15
- ES (F3) the first 15
- Acquire Background 16
- Calibrate Area Monitor 16
- Utilities 16
- Adjustment Complete 16
- 3.2.3 Fine Energy Calibration 18
- TART (F2) 19
- CCEPT (F4) 19
- ULL and P-SHORT keys 20
- Analysis Tools 21
- Area Monitor Setup 22
- Select Dose Rate Units 22
- Select Dose Rate Trigger 22
- 3.4 Dose Rate Calibration 23
- 4. Operating the SAM 935 24
- DJUST (F3) button 26
- 4.3 Powering the SAM 935 Off 27
- 4.5 Reviewing Alarms 29
- 4.6 The SAM 935 Interface 30
- 4.6.2 Function Keys 31
- 4.6.4 Editing Instructions 31
- Editing Text 32
- Editing Numbers 32
- 4.6.5 The Utilities Screen 33
- 5. SAM 935 Modes of Operation 34
- 5.4 Manual Mode 36
- Section 5.4.3 37
- 5.4.1 MCA Presets 38
- 5.4.3 Manual Mode Utilities 40
- 5.5 Background Mode 41
- 5.6 Calibration Mode 42
- 5.6.2 Fine Energy Calibration 43
- 6. Utilities 44
- 6.1 Area Monitor Setup 45
- 6.1.2 Select Triggers 46
- Set Default Trigger 47
- 6.1.4 Preventing False Alarms 48
- 6.1.5 Calibrate Dose Rate 49
- NTER to save the new value 50
- 6.2 Clear Stored Alarms 51
- 6.3 Edit Isotopes 51
- 6.3.1 Adding a New Isotope 52
- 6.3.2 Enable/Disable Isotopes 52
- 6.3.3 Editing an Isotope 52
- 6.4 Edit Isotope Radiations 53
- 6.5 Print Databases 53
- 6.6.1 Adding a Standard 54
- 6.6.2 Deleting a Standard 54
- 6.6.3 Editing a Standard 54
- 6.7 Select / Edit Detector 55
- 6.8 Analysis Tools Setup 56
- 6.10 Show System Information 57
- 6.11 Set Serial Speed 58
- 6.12 Set Report Title String 58
- 6.14 Set Backlight Delay Time 59
- 6.15 Print Stored Spectra 59
- 6.16 Clear Stored Spectra 59
- 6.17 Switch to Remote 60
- 6.18 Clear ALL Data and Reset 60
- 7. Reports 61
- 7.3 Energy Calibration Report 62
- 7.4 Manual MCA Report 63
- 7.5 Database Reports 64
- 8. Specifications 65
- Appendix A: AutoLoad 67
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