ECOTEST SPECTRA MKS-11GN Operating Manual page 16

The device is structurally designed as a shape derivative of
rectangular parallelepiped with flat planes being replaced with
surfaces of large radii of curvature with rounded edges. The body is
dustproof, waterproof, made of plastic. The device has upright
working position.
The ingress protection rating is – IP67. The body consists of two
covers (1) and (2) connected by screws. The front cover (1) contains
the graphical color display (3), multifunctional manipulator
(joystick) (4), indicators – GAMMA (7), NEUTRON (8),
BATTERY (9) – and the light sensor ABC (10). In the upper part of
the cover, there is a light display (5) for alarm triggering when
radioactive sources are detected.
A spring clip retainer (11) is secured with one screw on the back
cover, with the help of which the device is securely fastened onto the
operator's clothes, and which can be easily removed, if necessary.
The back cover and the clip are marked with "+" symbols (12),
which stand for the mechanical centers of photon-ionizing and
neutron radiation detectors, respectively.
On the right lateral surface of the device's body under the
protective flexible plug (6) there is a USB connector to connect the
peripheral devices and charge the built-in battery.
The device is powered from a lithium-polymer battery of 3.7 V
rated voltage.
The device is sealed with a paste in the indention (13) of the
bottom cover.
1.4.2 Operation of the device
The device consists of the following main parts: high-sensitivity
detecting unit of gamma radiation (GDUh), low-sensitivity detecting
unit of gamma radiation (GDUl), detecting unit of neutron radiation
(NDU), supply voltage formers (SVF), bias voltage formers (BVF),
GPS/GNSS receiver (NAV), display and processing module (DPM),
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