A. OUTPUT MODE DEFINITIONS

1. Hysteresis mode provides one output signal at a programmed switch point with an adjustable hysteresis range to maintain the output below the switch point. The hysteresis mode output does not provide an "Upper Limit" feature and is typically used for pressure confirmation.

2. Window comparator mode provides a lower limit output and upper limit output at programmed switch points. The user creates an "operating window" with the window comparator mode by  programming the lower and upper limts of the sensor output.  Use the window comparator mode if the application requires an output signal , either "on" or "off" between two critical  pressure points.  See the graphs below for illustration.

SWITCH OUTPUT SIGNAL BEHAVIOR GRAPHS

Hysteresis Mode graph:  This output mode programs the sensor to provide an output signal  "NPN or PNP" at  switch points " H-1" (output 1) and "H-2" (output 2) on the above graph  (left).  The switch points  are independent and adjustable by touch panel on the sensor.  The Hysteresis is a value "h-1" or  "h-2"  to control  the output signal  below the switch point "H-1/H-2" of the output.  This is adjustable on the sensor and  mathematically defined as:

                                                                  (switch point)               "H-1"/"H-2"  

                                                                      MINUS

                                                               (Hysteresis range)           "h-1"/"h-2"  

                                                                                          HYSTERESIS SWITCH POINT

Window Comparator Mode Graph:  This output mode programs the sensor to provide an output signal "NPN or PNP" between switch  points "A" and "B" on the above graph (right).  The switch points "A-1/A-2" (low point) and "B-1/B-2" (high point) are independent and adjustable on the sensor.   The window comparator mode is sometimes referred to as a "High/Low" setting or a "Failure prediction mode".  The reference depends on the application and pressure ranges

PROGRAMMING PROCEDURE

OUTPUT 1

The factory setting for output 1 is the HYSTERESIS mode.  To change the factory setting , press the "Mode" key 2 times (the number "2" will appear on the display) and wait 3 seconds.  "OU1" and "HYS" (hysteresis mode) will alternate on the display.  Press the "Arrow Up" key to change the output mode from "HYS" to "CNP" (Window Comparator Mode).  "OU1" and "CNP" will then alternate on the display.  After selecting the desired output mode, press the "Mode" key one time to enter and store this information.  The word "END" will appear signifying completion of this programming sequence.

OUTPUT 2

The factory setting for output 2 is the HYSTERESIS mode.  To change the factory setting, press the "Mode" key 4 times (the number "4" will appear on the display) and wait 3 seconds.  Follow  the same procedure  for OUTPUT 1 above.  Press the "Mode" key one time to enter and store this information.  The word "End" will appear signifying completion of this programming sequence.

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