INFICON Stripe CDG100Dhs 0.1 ... 1000Torr / mbar - Manual (Page 34)

34 tina95e1 (2014-07)
4.5 ATM Setpoint
The setpoints SP1 and SP2 of gauges with separate atmos-
pheric pressure sensor
7)
can be programmed to atmospheric
pressure setpoint (ATM setpoint) via the diagnostic port or the
EtherCAT interface.
The ATM setpoint is defined as a factor of the current atmos-
pheric pressure. The relay switches when the pressure in the
vacuum system has reached the defined value (differential
pressure in relation to the atmospheric pressure).
Example: ATM setpoint: 110% of the atmospheric pressure
(= factor 1.1)
Switching characteristic: High Trip Point
Hysteresis: 10 mbar
Measurement signal
(pressure p)
1078 mbar
980 mbar
Atmospheric pres/
sure (ambience)
ATM setpoint 110%
(= factor 1.1)
Hysteresis (1% F.S.)
Off On Off
Threshold value
Reset value
7 ) The atmospheric pressure sensor measures the atmospheric pressure
(pressure outside the vacuum system).