Inhibit Polarity
Sets the polarity of the HVPS's Inhibit signal's voltage. Defaults to active high.
Check the box to set the polarity to active low.
POSITIVE POLARITY is used with Canberra preamplifiers. The 'enable'
condition (cold detector) is an open circuit or active high = +1.2 V to +24 V;
Inhibit condition (warm detector) is –24 V to <+1.2 V or ground.
NEGATIVE POLARITY is used with preamplifiers and LN monitors, where
the 'enable' condition (cold detector) is –24 V to <+1.2 V; Inhibit condition
(warm detector) is open circuit or active high = +1.2 V to +24 V. With Negative
polarity selected an open input will disable the high voltage.
Reset
If the Inhibit Latch is enabled (see Inhibit, above) and has been tripped during an
acquisition, it will shut down the High Voltage Output (and uncheck the 'On'
checkbox). Click the Reset button to reset the Inhibit Latch in this scenario. The
HVPS remains off until turned on by the user.
Status
Two Status indicators display the high voltage power supply's status: marked if that
condition is met, unmarked if not. The webpage must be periodically updated in or-
der to see the most current hardware status.
Ramping – On when the HVPS output is ramping up. Off when no output or at full
output.
Fault – Fault is checked whenever the HVPS encounters a fault state. This indicates
that the HVPS encountered a Fault condition, and is shut down.
Note The HVPS output will remain Off until the user intervenes (addresses the
fault condition) and then re-activates the HVPS by changing the On setting.
Actual Voltage – Displays the current output voltage.
User’s Manual 93
HVPS | Status MCA Settings
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