INFICON PSG55x ATM to Medium Vacuum Gauge - Manual (Page 40)

40 tina60e1-a (2011-04)
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.
Setpoint
High Trip Point
Time t
Off On Off Off On
Setpoint
Low Trip Point
Measurement signal
(Pressure p)
Hysteresis
(10% of threshold)
Threshold value
Hysteresis
(10% of threshold)
Threshold value
The setpoints can only be programmed via
• the diagnostic port (→ [3])
• the DeviceNet, Profibus and RS485 interface
( → [3], [4], [5]).