5. Commissioning, operation
5.5 Teach function (optional)
With the teach function, the instrument can be configured by short-circuiting the teach pin with U-.
Setting the switch point and window values
To adopt the prevailing process pressure as a new switch point or high value (window).
EN
Short-circuit the teach pin with U- for 2 ... 5 seconds.
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Blinking yellow: Teach mode for switch point active, remove short-circuit.
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Blinking green: New switch point adopted.
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Blinking red: Teach pin not short-circuited for long enough or error in teach process.
The reset point and the low value for the window function will be corrected automatically. The previously
set hysteresis (for default value, see appendix 1 "Default values") or the difference between the window
high and window low will be restored. In the event that the prevailing pressure is below 5 % of the
measuring range end value, no teach process will be carried out. Should the prevailing pressure be less
than the set hysteresis or the set window band, the reset point or the low value of the window function
will be set to the start of measuring range.
Setting the switching function
To change the switching function between normally open and normally closed.
Short-circuit the teach pin with U- for 10 ... 20 seconds.
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2 ... 5 seconds: Blinking yellow: Teach mode for switch point active, do not remove short-circuit.
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5 ... 10 seconds: Permanently lit yellow: Teach mode changes to switching function, do not remove short-circuit.
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10 ... 20 seconds: Blinking yellow: Teach mode for switching function active, remove short-circuit.
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> 20 seconds: Permanently lit yellow, teach process failed.
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Blinking green: Switching function changed.
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Blinking red: Teach pin not short-circuited for long enough or error in teach process.
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WIKA operating instructions, pressure sensor, model A-1200