Thermo Scientific SAM12, Manual

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Issue: 1.0 Introduction
Thermo Fisher Scientific SAM12 User Manual 1-3
Chapter 1
Introduction
Small Articles Monitor
The Small Articles Monitors type SAM12 is designed for
monitoring gamma contamination of various items including
tools, clothing and personal effects and may also be used for
waste. Door switches and a start button are used in conjunction
with a back-lit touch-screen LCD, large area coloured lamps
and distinctive audible tones, to make controlled monitoring
fast and simple.
The outward appearance is similar to that of a safe, with a user
control and display panel mounted above the hinged door(s).
The electronics is housed in a compartment on top of the
instrument for easy maintenance. One or two inch (25mm or
50mm) thick lead shielding, screens the detectors and internal
measurement volume from background radiation.
Four, or optionally six, large area plastic scintillation detectors
are situated on the top, bottom, left and right and optionally
front and back sides of the sensitive volume. Each detector has
a separate, independently adjustable High Voltage (HV)
supply. Five discriminators are available per detector. This
provides adjustable windows for measuring different energy
levels. A removable stainless steel liner forms the internal
measurement volume. A low density liner is used in the low-
energy version.
A Mains power supply charges a 12 volt sealed lead-acid
battery to power the instrument and provides at least eight
hours operation in the event of mains failure. User definable
passwords protect all system parameters, which are accessed
through the touch-screen keypad.
The instrument security is protected by the presence of a USB
security dongle. In addition to the dongles, User-definable
passwords protect all system parameters, which are accessed
through the touch-screen LCD.
Operational parameters are user programmable and stored on
the instrument’s hard drive. In addition, all operational
parameters, including calibration and HV Scan data, are backed
up on an internal compact flash disk.
The system performs self tests at power-on and at regular
intervals during background acquisition. When not actively
engaged in monitoring, the system continuously acquires,