Telemark CHEETAH TT-10 CE 208 VAC, Инструкция по эксплуатации, Страница: 27 / 39

Telemark TT Cheetah Series Power Supply Instruction Manual
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Cut-Back: This is the current limit where "cut-back" kicks in. This limit protects the
power supply from damage from excessive output currents like from short circuits or
from arcing in the vacuum chamber by turning off HV via the power tube. It also
handles arcing of the electron beam source by quickly turning off the HV output for an
extremely short instance to extinguish arcs. HV fully recovers within milliseconds
when over-current is gone.
This limit is adjusted to about 5% above maximum output current.
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Total Current Limit: This limit works on the emission current control loop and cuts in
when a control voltage higher than 10.00VDC is applied.
This limit is set to about 2% above maximum output current.
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Reference Voltage Limit: This limits the reference voltage feeding the front panel
potentiometer for Source current as well as the reference voltage available at pin 29
of J5 for remote use.
This limit is set to about 2mA above maximum output current.