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Page 32 Installation and Operation Manual
Display alternates between OPEN and LOOP and the
pressure reading
The OPEN LOOP message is displayed with the V option
(4-20 mA analog output) in the following circumstances:
The analog loop is turned on, but nothing is connected to the
analog output connector. In this case, press the [MENU] key
to enter the programming mode. Use the [UP/DOWN
ARROW] keys to set this option to OFF. Press the [STORE]
key to temporarily save the change. Press the [RUN] key,
followed by the [SELECT] key to save the change
permanently and return on-line.
The analog loop is turned on and connected, but the
connection has been broken. In this case, repair the broken
connection, or turn the loop off using the method described
in the previous paragraph.
Load resistance exceeds 600 ohms. In this case, reduce the
resistance.
Display is blank
Press the [S1 INCR] key. If the display illuminates and displays
the increasing set point for Switch 1, then the Disp display update
option has been set to OFF.
If the display does not react, there has been an internal component
failure. Contact Neo-Dyn Customer Service for assistance.
Display shows E-95
This code indicates that the internal manufacturing data, which is
saved in the nonvolatile RAM, has become corrupt.
Power down the unit and then turn the power back on. If the unit
continues to show E-95, contact Neo-Dyn Customer Service for
assistance.