ALPHA PARTICULATE AIR MONITOR

MODEL # FM-7MA2

FEATURES: RUGGED DIFFUSED JUNCTION DETECTOR QUICK CHANGE FILTER REAL TIME OPERATION PROVIDES LOCAL OR REMOTE SAMPLING RS-232 OUTPUT TO COMPUTER OR PRINTER

Figure 1: FM-7MA2

APPLICATION: The FM-7MA2 is an ideal instrument to assure safety against airborne Alpha radiation,even in high or varying background situations. With presettable alarm point and built-in RS-232 output to computer or printer.The FM-7MA2 is designed for stand alone operation. The system provides integrated exposure information and has pulse output available. The FM-7MA2 is a complete system but may be expanded according to the needs of the user utilizing the many modules of the FM-7 series.

DESCRIPTION: The FM-7MA2 system utilizes a solid state detector and two coordinated single channel analyzer windows. The sample window (PHA allows the user to preset specific energy level for sample (eg. Radium A peak), measuring Pu-239 or other alpha emitters in the presence of significant or changing Radon-Thoron background. The count rate is read on the front panel digital display. These meters have a 6 digit display for both rate and integrated information. The user can select the operating modes: gross count, pulse height analyzing (PHA), or PHA with background subtract (PHA-SUB). The high level alarm trip point is settable over the entire range. When activated, the system provides a flashing red beacon and loud bell for visual and audible warning. An adjustable alarm delay prevents short term transient alarms. The system uses a quick change 47mm filter. The unit may be plumbed to an air pump such as AP-2 or AP-4, hood exhaust or in-house air system. Included with the FM-7MA2 are six feet of plastic tubing, a box of 100 Millipore SM filters and complete users manual.

ACCESSORIES AND OPTIONS AVAILABLE:

4-20 mA Process Loop Transmitter.
Remote Alarm
Remote Readout

^T_A  TECHNICAL ASSOCIATES
7051 ETON AVENUE * CANOGA PARK, CA 91303
TELEPHONE (818) 883-7043 * FAX(818) 883-6103
e-mail: tagold@nwc.net     www.tech-associates.com

ALPHA PARTICULATE AIR MONITOR

MODEL # FM-7MA2

SPECIFICATIONS:

• Detection: 1% of MPC of Pu-239 can be detected with average Radon-Thoron background.
• Counting Efficiency: 20 percent of 2 pi with wide window setting and 47mm Pu-239 source in the filter holder.
• Detector: Solid state detector, cleanable silicon diffused junction with a 490 sq. mm area and a typical alpha resolution of 60 KeV maximum.
• Ranges: 0.0005 Bq with 1 hour time constant setting equivalent to 7x10^-7 Bq/m 3 at 70 liter/min air flow.
• Response time: 1 sec. to 10,000 sec.
• Modules and  
• Functions Include:

  MFT-5A	Sample Detector
  MAC-5	Air Flow Control
  MAR-6	Alarm Relay and Acknowledge (bell disable)
  MVR-5R	Power Supply
  SUB-5	Three level energy analyzer
  AIR-5B	Air Inlet-Outlet
  MPL-5	Process Loop Transmitter (optional)
  FIL-7	Digital Process Readout with RS-232 Output

• Filters: Includes a package of100 Millipore SM 47mm filters.
• Temperature Range: 20 to 130 degrees F. (7 to 54 degrees C.)
  Total change in system gain is less than ± 5.
• Finish: Baked enamel, easily cleaned.
• Weight: 35 lbs.
• Power: 115V, 60 Hz (230 Volts, 50 Hz optional.)

CONTROLS, FRONT PANEL:	INDICATORS:
Master power switch for all electronics.	Alarm Beacon, rotating.
Power On for pump power and running time register.	Alarm Bell, fast ringing.
Bias Voltage Adjust, 0-50 Volts.	6 digit LED.
High Level alarm set pot.	High Level Alarm Lamp.
Operate / Calibrate button.	Low Level, Loss of Signal Lamp.
Alarm Set button, displays alarm setting on meter.	Running Time Meter.
Alarm Reset.	Air Flow Rotameter.
Bell Disable/Alarm Acknowledge switch	``Power On`` Pilot Light for electronics
Percent subtract pot.	``Power On`` Light for pump power.
Threshold/Discriminator, ten turnpot with 1,000 division dial.	Bell Disable / Acknowledge Light.
Sample window (PHA) always constant above threshold, ten
turn pot with 1,000 division dial.
Mode Switch - Gross Count, PHA, PHA-SUB.

^T_A  TECHNICAL ASSOCIATES
7051 ETON AVENUE * CANOGA PARK, CA 91303
TELEPHONE (818) 883-7043 * FAX(818) 883-6103
e-mail: tagold@nwc.net     www.tech-associates.com