14247390.02 11/2019 EN/DE/FR/ES
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WIKA operating instructions, pressure sensor, model A-1200
EN
5. Commissioning, operation
5.6 Colour codes of status display
Colour
Interval
Description
Green
Lit permanently
Instrument is ready for operation, no error
Blinking (5 seconds)
Teach successful
Yellow
Blinking (continuously)
Temporary error, operation outside of the specification (e.g. under- or overpressure,
under- or overtemperature).
Lit permanently
Time exceeded, teach signal applied longer than 20 s
Blinking (during teach)
Instrument blinks so long as the teach is running
Red
Blinking (continuously)
“Locate me” function active or permanent error; In case of a permanent error, the instru-
ment must be replaced
Blinking (5 seconds)
Teach failed
5.7 Switching functions
Hysteresis function (configurable via teach function or IO-Link)
If the system pressure fluctuates around the set point, the hysteresis keeps the
switching status of the outputs stable. With increasing system pressure, the
output switches when reaching the switch point (SP).
■
Normally open contact (HNO): Active
■
Normally closed contact (HNC): Inactive
With system pressure falling again, the output will not switch back before the reset
point (RP) is reached.
■
Normally open contact (HNO): Inactive
■
Normally closed contact (HNC): Active
Fig.: Hysteresis function