Detcon FP-524D-HRT - Manual (Page 21)

Model FP-524D-HRT
FP-524D-HRT Instruction Manual Rev. 0.1 Page 17 of 48
If the sensor passes the stability check, the sensor display reports a series of messages:
“AutoSpan Complete”
“Sensor Life XXX%”
“Remove Span Gas”
d) Remove the span gas and calibration adapter. The sensor will report a live reading as it clears toward “0”.
When the reading clears below 5 % LEL, the sensor will display “Span Complete” and will revert to
normal operation. If the sensor fails to clear to less than 5% LEL within 5 minutes, a “Clearing Fault” will
be reported twice and the sensor will return to normal operation, aborting the AutoSpan sequence. The
sensor will continue to report a “Clearing Fault” and will not clear the fault until a successful AutoSpan is
completed.
NOTE 1: If the sensor fails the minimum signal change criteria, a “Range Fault” will be
declared and a “Fault Detected” message will be displayed alternately with the sensor’s current
reading. The 4-20mA output will be taken to 0mA.
NOTE 2: If the sensor fails the stability criteria, a “Stability Fault” will be declared and a
“Fault Detected” message will be displayed alternately with the sensor’s current reading. The
4-20mA output will be taken to 0mA.
NOTE 3: If the sensor fails the clearing time criteria, a “Clearing Fault” will be declared and a
“Fault Detected” message will be displayed alternately with the sensor’s current reading. The
4-20mA output will be taken to 0mA.
3.5 Program Mode
Program Mode provides a View Sensor Status menu to check operational and configuration parameters.
Program Mode also provides for adjustment of the AutoSpan Level, Bridge Voltage, Gas Factor, and Cal
Factor. Additionally, it includes the Restore Factory Defaults and Signal Output Check diagnostic functions.
The Program Mode menu items appear in the order presented below:
View Sensor Status
Set AutoSpan Level
Set Gas Factor
Set Cal Factor
Set Bridge Voltage
Signal Output Check
Restore Default Settings
Navigating Program Mode
From Normal Operation, enter Program Mode by holding the magnet over PGM2 for 4 seconds (until the
displays starts to scroll “View Sensor Status”). Note, the “▼” prompt will show that the magnetic switch is
activated during the 4 second hold period. The sensor will enter Program Mode and the display will display
the first menu item “View Sensor Status”. To advance to the next menu item, hold the magnet over PGM1 or
PGM2 while the current menu item’s text is scrolling. At the conclusion of the text scroll, the arrow prompt
(“▼” for PGM2 or “▲” for PGM1) will appear, immediately remove the magnet. The display will advance to
the next menu item. Repeat this process until the desired menu item is displayed. Note, PGM1 moves the
menu items from right to left and PGM2 moves the menu items from left to right.