Detcon FP-524D INSTRUCTION MANUAL - Manual (Page 31)

Model FP-524D
FP-524D Instruction Manual Rev. 1.4 Page 27 of 39
4-20mA Loop Fault
If the sensor detects a condition where the 4-20mA output loop is not functional (high loop resistance or failed
circuit function) a “4-20mA Fault” is declared. A “4-20mA Fault” will cause the “Fault Detected” message to
scroll once a minute on the ITM display. If a Loop Fault occurs, the 4-20mA signal will be set at 0mA until
the fault condition is resolved.
If the 4-20mA current loop is still out of tolerance, contact Detcon at
[email protected] , or contact Detcon customer service.
Input Voltage Fault
If the detector is currently receiving an input voltage that is outside of the 11.5-28VDC range, an “Input
Voltage Fault” is declared. An “Input Voltage Fault” will cause the “Fault Detected” message to scroll once a
minute on the sensor display. If an Input Voltage Fault occurs, the 4-20mA signal will be set at 0mA until the
fault condition is resolved.
Temperature Fault
If the detector is reporting currently an ambient temperature that is outside of the –40ºC to +75ºC range, a
“Temperature Fault” is declared. A “Temperature Fault” will cause the “Fault Detected” message to scroll
once a minute on the sensor display. If a Temperature Fault occurs, the 4-20mA signal remains operational.
AutoSpan Fault
If 180 days has elapsed since the last successful AutoSpan, an AutoSpan Fault will be generated. An
“AutoSpan Fault” will cause the “Fault Detected” message to scroll once a minute on the sensor display. If an
AutoSpan Reminder Fault occurs, the 4-20mA signal remains operational.