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Reference Manual
00809-0100-4027, Rev AA
December 2005
Rosemount 4500
4-12
SPAN FAIL
The span value, set with the local span adjustment button, exceeds the
maximum range down allowed for a particular range, or the pressure sensed
by the transmitter exceeds the sensor limits.
KEYS DISABL
This message appears during reranging with the integral zero and span
buttons and indicates that the transmitter local zero and span adjustments
have been disabled. The adjustments have been disabled by software
commands from the HART Communicator or AMS. Keys are not detected
when write protect jumper is active. See “Security (Write Protect)” on
page 2-5 for information on the software lockout.
STUCK KEY
The zero or span button is stuck in the depressed state or pushed too long.