Presys PC-507-IS Technical Manual page 36

Connect the pressure switch relay output to the contact input of the Calibrator,
V IN and mA OUT (+) terminals, and make the pneumatic connections illustrated in
the figure below.
Select SW (switch) from the input menu of the calibrator and Pressure from
the output menu.
Vary the pressure manually. The contact input will track the output pressure
reading until the relay position changes. At this time, the relay input reading will
'freeze' with the LOCK message in the upper line of the display. The value next to the
LOCK message is the pressure switch alarm setpoint.
To unlock the input, press the arrow key .
Fig. 20 – Pressure Switch
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