Inficon PSG550 Operating Manual page 40

High & Low Trip Point
Both a High Trip Point and a Low Trip Point are assigned to
each setpoint. If the pressure in the vacuum system is higher
than the defined High Trip Point threshold, the corresponding
LED (<SP1> or <SP2>) is lit and the corresponding relay is
closed. If the pressure in the vacuum system is lower than the
defined Low Trip Point threshold, the correspoinding LED
(<SP1> or <SP2>) is lit and the corresponding relay is closed.
Measurement signal
(Pressure p)
Off
40
Setpoint
High Trip Point
Setpoint
Low Trip Point
On
The setpoints can only be programmed via
• the diagnostic port (→
• the DeviceNet, Profibus and RS485 interface
(→ [3], [4], [5]).
Threshold value
Hysteresis
(10% of threshold)
Hysteresis
(10% of threshold)
Off On
[3])
Threshold value
Time t
Off
tina60e1-a (2011-04)