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North Penn Business Park,
4500 North Cannon Ave. Lansdale, PA
19446, USA
Tel No.: (267) 436-3991
Fax: (215) 362-5343

CRAIG MILLS:
Email id: cmills@apantec.com
Tel No.:267-436-4034
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Providing Innovative Engineering Solutions for Radiation MonitoringProviding Innovative Engineering Solutions for Radiation Monitoring Providing Innovative Engineering Solutions for Radiation Monitoring
Continuous Air Monitors
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AM2M Continuous Air Monitor –Moving Tape Particulate & Noble Gas
Gain Stabilized
.Net Ready
AM2M Continuous Air Monitor –Moving Tape Particulate & Noble Gas

The AM2M is a continuous air monitoring system designed to measure the particulate and noble gas activity in a sample airstream. The AM2M uses two separate measuring channels arranged in series to perform the measurement. A common vacuum pumping system is used for transport of the sample gases through the system. Local RM1W display and control units are included for system operation, data concentration and communication. The particulate channel uses a lead shielded moving filter providing collection of airborne particles using a continuous spool of filter paper. The filter paper deposition is designed to provide an even distribution and includes the capability of adjusting the filter paper speed to accommodate applications that deposit higher activities, such as post-accident monitoring and analysis. The particulate channel will be equipped with a beta sensitive plastic scintillation detector (model SD201PB) for detection of beta emitting particles. The detector interfaces with a locally mounted pulse analyzer (model SDA3E) which provides the biasing voltage to the detector, analyzes the nuclear pulses for counting, and provides an automatic gain control function.

The SDA3E unit communicates with the skid mounted display and control unit (model RM1W) using Ethernet (TCP/IP), RS232 or RS485 communications for display of the measured activity and for alarm determination. The exhaust from the particulate channel is plumbed to the inlet of the noble gas monitoring channel. The sample gases, with particulate and iodine activity removed, enter the noble gas sampler for measurement. The noble gas sampler (model GS54) is a lead shielded sampler enclosing a sensitive volume. A SD201PB beta scintillation detector is located with the sensitive volume for measurement of noble gas activity. Again, the detector detects the nuclear events, pulses, biasing voltage, and performs gain stabilization. The noble gas sampler includes a vacuum transducer to automatically correct the measured activity to standard pressure. The vacuum pumping system uses a positive displacement carbon vane pump for transport of sample gases through the monitoring system. A mass flow meter and proportional control valve allows the sample flow rate to be either manual set to the desired flow or to match the sample flow rate to a stack or vent velocity for representative sampling. The flow rate is provided to the local RM1W electronics for determination of total release and for calculation of concentrations. Alarms are included for annunciation of a low flow condition.

Particulate Activity
Lower Limit of Detection: 1E-11 uCi/cc
Dynamic Range: 1E-11 uCi/cc to 1E-5 uCi/cc Referenced to Cs-137
Noble Gas Activity
Lower Limit of Detection: 1E-7 uCi/cc
Dynamic Range: 1E-7 uCi/cc to 1E-1 uCi/cc Referenced to Xe-133
Component Specifications SD201PB
Detector: NE102 beta plastic scintillator & BGO gamma scintillator
Dynamic Range: 1E+0 to 1E+7 CPM
Detector Output: Negative Pulse.
Accuracy: ±15% of true field intensity.
Linearity: ±5%.
Operating Voltage:

500 to 1500 V.NOMINAL LED BKGND: 10–15 CPM

Operating Humidity: up to 95% non-condensing
Housing: Moisture Proof Stainless Steel.
Weight: 2.7 kg (5 lb).
RM1W Series Display & Control
Processor: 32-BitHighPerformance133MhzIntegrated Microcontroller Designed for Real-time and PC/ATcompatible
embedded applications Robust Automotive / Telcom Grade Technology with Watchdog Timer
I/O Processor: Dedicated / High Performance I/O Co-Processing via FPGA / 100 Mhz
Display:

Display: LCD with backlight Available 2 x 20 character vacuum fluorescent Analog/Digital Auto ranging and Auto zeroing Alarm/Status Indicators:

Alarm/Status Indicators:
Red indicator: HIGH
Amber indicator: ALERT
White indicator: FAIL
Green indicator: NORMAL
Outputs:
Digital: (3) RS485
  (1) TCP/IP

Ethernet: (1) US Analog , (4) 0-10VDC, or (4) 4-20 mADC isolated

Relays: Six DPDT relay contact for FAIL,
  ALERT, HIGH and MISC alarms
  Relay contact rating 5A @
  115VAC resistive
Power: 90-260VAC, single phase, 47 to 63 Hz, 15 watts
Temp:

-100 to +500 C

Humidity: up to 95% RH, non-condensing
 
SDA3E Analyzer
Physical and electrical dimensions
Configuration: Single detector input
Interface: USB, Ethernet (TCP/IP), RS485/MODBUS
Power requirements: max. 250 mA, through USB
Dimensions: 6.25 in W x 7.5 in H x 5.03 D
Spectrum parameters
Spectrum length: 1024 Channels
Bits per channel: 32
Operating mode: PHA, opt. MCS
Memory: 2k Channels
Programmable Controls
Fine Gain: x0,5000 – x2,0000
Preset Mode: Live or Real Time
Preset Time: 0,1 – 106 sec.
Signal Processing
ADC: Integrated Wilkinson, 60 MHz
Conversion range: 1024 channels
Pulse shape: Bipolar
Peaking time: 1μs
Fast channel peaking: 0,1μs
Conversion speed: 8μs
Int.-Non-Linearity: ≤± 0,05% of full scale over the top of 99 % of selected range
Diff.-Non-Linearity: ≤± 0,5% over the top of 99 % of the range including the effects of INL
Dead time correction: software controlled
LLD: 4096 steps, software controlled
ULD: 16 steps, software controlled
High Voltage
Range: 0 to +1200 V dc, 1mA integrated into tube base, 4096 steps, software controlled
Environmental
Temperature: 0 to 50 °C
Humidity: up to 80%, non condensing
 
The AM2M is provided fully wired and plumbed on an open frame skid for ease of maintenance. A power distribution enclosure is provided which distributes the
required operating voltages to the system electrical components. In addition, the power distribution box provides an instrument ground function as well as providing circuit breaker protection for the system.
 
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