ALPHA AND BETA-GAMMA HAND & SHOE MONITOR WITH DIGITAL DYNAMIC
BACKGROUND SUBTRACT

Model # HSM-10G([fig] ([fig] ([fig] HSM-10G Display panel) FEATURES:

* READS ALPHA AND BETA-GAMMA SEPARATELY 
  AND SIMULTANEOUSLY

* AUTOMATICALLY ADJUSTS FOR CHANGING BACKGROUND 
  LEVELS

* ALL MODULAR INTEGRATED CIRCUIT DIGITAL CIRCUITRY

* TILTED READOUT PANEL AT EYE LEVEL FOR EASY VIEWING

* PROJECTOR WARNING SYSTEM

* LOW LEVEL ALARM, HIGH BACKGROUND ALARM AND
  CONTAMINATION ALARM

* AUDIBLE WARNING IF HANDS OR SHOES ARE MOVED OFF 
  OF DETECTION AREA BEFORE END OF COUNTING TIME

* INDIVIDUAL ALPHA AND BETA-GAMMA VISUAL ALARM
  INDICATORS

* SHIELDED ^{1} EASILY DECONTAMINATED GAS FLOW
  DETECTORS

* FILTERING AND CABLING DESIGN MINIMIZES ELECTROMAGNETIC
  
  INTERFERENCE FROM EXTERNAL SOURCES

GENERAL DESCRIPTION: The HSM-10G monitors both alpha and
beta-gamma in each channel. There are three channels of
detection - left foot, right foot, and hands (* see specs
for other options). Each channel has separate alarm level
set switches for alpha and for beta-gamma radiation. Background
is monitored continuously while the system is unoccupied.
Background subtraction uses the most recent beta-gamma background
count. Time for the monitoring count is preset on a versatile
digital timer with choices from 1 to 99 seconds in one second
intervals. This preset time is also the background update
time. The beta-gamma alarm switch for each channel sets
the count above background needed within the preset time
period to excite an alarm. Alpha background is low (typically
<< 10 cpm) and may be neglected or counted by the HSM-10G
and added to give best preset alpha count.

Operation is digital. Indicators include LED's and warning
projection with warnings projected onto a front panel screen
in a large and very effective display. A five digit plus
overflow LED display can be switched to each channel for
alpha, beta, or background displays for aid in calibration.
The display and controls are behind a locked cabinet door.
Counting time for all channels is preset on a digital timer
with choice of 1 to 99 seconds in 1 second increments. High
sensitivity is achieved by using spring loaded hand detectors,
large, minimum thickness detector windows and maximum transmission
protection screens.

T_{\textrm{A}}                                   TECHNICAL ASSOCIATES                                   
------------------------------------------------------------------------------------------
  7051 ETON AVENUE * CANOGA PARK, CA 91303 TELEPHONE (818) 883-7043 * FAX(818) 883-6103   


$Revision: 1.2 $

ALPHA AND BETA-GAMMA HAND & SHOE MONITOR WITH DIGITAL DYNAMIC
BACKGROUND SUBTRACT

Model # HSM-10G

SPECIFICATIONS:

*Options of : left hand, right hand, both feet or left foot,
right foot, both hands.

Hand Detectors: 10-3/4" x 6-1/4"
each side (gas flow) - 4 hand detectors.

Shoe Detectors: 16-1/4" x 6-1/4"
each shoe (gas flow) - 2 shoe detectors.

Detector Construction: Hinged mounting for easy access
and decontamination. Shielding for background reduction.
0.5 mg/cm^{2}aluminized Mylar detector windows
with protection screen 73% open area.

Shielding: \geq  2 pi shielding about detectors
- steel 0.7" lead equivalent. (Optional)

Channels: Left shoe, right shoe, hands or left hand, righthhand,
both feet or left foot, right foot, both hands.

Utility Scaler: 0 to 99,999 plus overflow with LED
display. Can switch to left shoe alpha; left shoe beta;
right shoe alpha; right shoe beta; hands alpha; hands beta.

Channel Counting Time: Selectable
from 1 second to 99 seconds in 1 second increments.

Background Update Interval: Background
updates automatically whenever unit is not occupied. Background
update interval same as channel counting time.

Alarms: Background - Sonalert plus front panel light indicators.
Adjustable in 10 steps - 100 counts to 1,000 counts.
Low Level Alarm - (indicates malfunction) - front panel light
indicator (factory set).
Channel Alarms - Sonalert plus front panel light indicators.
Selectable in 1 count increments: Alpha - 0 to 99 counts;
Beta-Gamma - 0 to 999 counts.
Check Incomplete - Sonalert plus projector warning.

Projector Warning System: Front
panel screen 3-1/2" x 2-3/4"
with display of following messages - only one message displayed
at one time.
Contamination (location of contamination channels and whether
alpha or beta contamination also displayed).
Check OK
Ready for Use
Counter in Operation
Check Incomplete - Reset and Repeat

Front Panel Indicators: Message Projection,
High Background Alarm Light, Low Level Alarm Light, Power-On
Light

Use Count Register: (Audit instrument use) -
0 to 99,999 (Optional)

Power Source: 115 VAC, 60 hz (200-240 V, 50-60 hz optional)

Dimensions: Cabinet - approximately 67"
high x 27" wide x 24" deep
(170 x 70 x 60 cm)

Shipping Weight: 650 lbs. (295 kilos)

T_{\textrm{A}}                                   TECHNICAL ASSOCIATES                                   
------------------------------------------------------------------------------------------
  7051 ETON AVENUE * CANOGA PARK, CA 91303 TELEPHONE (818) 883-7043 * FAX(818) 883-6103   


$Revision: 1.2 $