Inficon PSG550 - Page 39

tina60e1-a (2011-04) 39
Time t
M
e
a
s
u
r
e
m
e
n
t
v
a
l
u
e
OffOn
Hysteresis
(10% of threshold)
Off
Setpoint
Measurement signal
(Pressure p)
Threshold value
The setpoints SP1 and SP2 are factory set to the lower
measurement range limit and therefore do not switch.
High Trip Point
If the pressure in the vacuum system is higher than the setpoint,
the corresponding LED (<SP1> or <SP2>) is lit solid and the
corresponding relay is closed.
Time t
OffOnOff
Setpoint
M
e
a
s
u
r
e
m
e
n
t
v
a
l
u
e
Measurement signal
(Pressure p)
Threshold value
Hysteresis
(10% of threshold)
Threshold value