ST365 Radiation Counter Technical Manual
May 2020 – Revision 2.0
Spectrum Techniques, LLC
www.spectrumtechniques.com
Page 8 of 14
High Voltage Set
and Display Mode:
(HV LED)
This mode is for either displaying or setting the high voltage level. The high voltage can
be set to any value between 0 and 1200 volts in 10 volt increments using the ‘LEFT’ and
‘RIGHT’ arrow buttons.
Starting a count or pressing the ‘STOP/RESET’ button do not affect the high voltage
setting.
Scintillation/GM
Mode Indicator:
(SCINT LED)
When this LED is on, the user can change the input detector type. For correct operation
the user must set the ST365 Radiation Counter correctly for the type of detector to which
it is connected.
Press the ‘LEFT’ and ‘RIGHT’ arrow buttons to set the instrument for either the “Scint”
(Scintillation) or “Geiger” (GM) detector. Inside the instrument you are selecting pulse
shaping, gain and thresholds appropriate for these different detector types.
