2 manual hardware adjustments, Manual hardware adjustments – BNC SAM 935 Portable Gamma Spectroscopy System User Manual
SAM 935™ Instruction Manual
5.4.2 Manual Hardware Adjustments
HW Adj/HW Info
This key switches the information displayed in the data window to the
When HW A
is selected from the Presets screen, a set of hardware parameters is listed in the
data window. The F4 function key becomes a D
key that returns the system to the data mode.
Displays the state of the bias voltage supply – on or off.
Current bias voltage setting. This voltage ranges from 200 to 1000 volts.
Amplifier coarse gain. Available values are 1, 2, 4 and 8.
Amplifier fine gain. Range is 1.00 to 2.55 in steps of 0.01.
Low level discriminator. Range is from 0 to 105 percent of full scale in
steps of approximately 0.4%. For normal work the LLD should be set to
0.8 or 1.2.
Upper level discriminator. Range is from 0 to 105 percent of full scale in
steps of approximately 0.4%. For normal work the ULD should be set to
ADC zero setting. Range is ±5% of full scale.
Conversion mode. The system is optimized for QCC (SQRT) mode. All of
the analyses should be done in this mode. Standard linear mode is pro-
vided for those who desire it.
Under manual MCA mode (the HW A
mode), it is possible to adjust these hardware parameters. In other
screen modes (HW I
), they may only be viewed.