BNC SAM 935 Portable Gamma Spectroscopy System - Manual (Page 65)

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