CAPINTEC, INC. CAPTUS
®
3000
High Voltage
The voltage level may be changed to a value between 0 and 1250 Volts. Use the scroll bar
below the High Voltage indicator to adjust the value. Either click the right (+) and left (-)
arrows, or drag the scroll bar.
Note: The voltage from the single power supply is applied concurrently to both detectors in
a two-detector system.
The High Voltage can be turned on or off by clicking the appropriate radio button below the
high voltage slider.
Gain
The MCA card installed in the system defines the System Gain range. MCA cards supported
by the software have two amplifiers: coarse (Gain1) and fine (Gain2) gain. The system
chooses the optimal combination of coarse and fine gains for the desired system gain.
System gain is the arithmetic product of coarse and fine gains.
To change the coarse (Gain1) and fine (Gain2) gain values, click the
button.
Figure 13-17 will appear.
Figure 13-17
Gain is adjusted by typing the desired gain into in one or both of the Gain text boxes (Gain
range is 1 to 256).
In order to activate the newly entered gain, click the
button or press Alt+D to return
to Figure 13-16. The System Gain number will update. This will set the gain until the MCA
mode is exited.
November 13 MCA 13-15
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