ECOTEST SPECTRA MKS-11GN Operating Manual page 22

2.3.2.1 A joystick with a central button as shown in Figure 1 is
used to manage the device's operation.
Use the joystick to change the operating modes of the device, its
settings, and navigate the menu. The central button serves to save the
settings, confirm the entered data, recalibration and switching on/off
the device.
2.3.2.2 GCD is used to control the device's operation.
2.3.2.3 In the process of operation, the device generates
vibration, sound, and light signals as described below.
2.3.2.3.1 Vibration and sound signals:
"Quantum", a sequence of short beeps that indicate the intensity
of registered gamma quanta or neutrons. Signal frequency is
proportional to the count rate of gamma quanta or neutrons. Signal
"Quantum" can be enabled or disabled only when the intensity
histograms of gamma and neutron channels are displayed.
"Sigma threshold level exceeding", periodic light, sound, and/or
vibration signals that indicate on exceeding of the preset intensity
threshold of gamma quanta count or conventional neutrons threshold
level.
"Safety threshold level exceeding", periodic light, sound,
and/or vibration signals generated when the measured value of
gamma radiation DER is higher than the safety threshold level.
"Accumulated dose threshold exceeding", periodic light,
sound, and/or vibration signals generated when the measured value
of gamma radiation DE is greater than the threshold level.
"Low battery", periodic light, sound, and/or vibration signals
that indicate to a significant discharge of the device's battery. These
signals can be completely disabled.
"Turning the device on/off", polytonic sound, vibration, and
light signals, which indicate that the device was switched on or off.
These signals can be completely disabled.
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