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If option 51.0 is set to 1, options 51.1 & 51.2 give the zero and span values for the input. There are
the measured values that are displayed when 4mA and 20mA appear at the 4-20mA SOx input
(PM17-18) on the FMI board.
Note: The values entered for these option parameters are in units of x10 p.p.m, and therefore an
entered value of 999 means 9990 p.p.m.
Option 52.0 - SOx level high alarm select (0/1)*
Options 52.1 to 52.7 - SOx level high alarm values (0 - 999)*
Option parameter 52.0 is only available if option 51.0 (SOx input select) is not set to zero.
If option 52.0 is set to 0, the SOx level high alarm is disabled.
If option 52.0 is set to 1, the SOx level high alarm is enabled and option parameters 52.1 to 52.7
become available.
Using option parameters 52.1 to 52.7, it is possible to set a different SOx level high alarm value for
each profile combination. Each option parameter may be set to any value between 0 and 999 inclu-
sive, in units of x10 p.p.m. Remember that the SOx zero and span is entered in units of x10 p.p.m.
If the burner is firing, it is only possible to make an adjustment to the option parameter which relates
to the selected profile combination. If the burner is not firing, the high alarm value for any profile
combination may be adjusted.
When the SOx level rises above the high alarm value for the selected profile combination, a fault
number will appear. See section xxx for details of fault numbers.
Option 53.0 - Auxiliary input 1 (PM7-8) select (0/1)*
Option 54.0 - Auxiliary input 2 (PM5-6) select (0/1)*
These option parameters determine the functions of the AUX1 (PM7-8) & AUX2 (PM5-6) inputs on
the FMI board. They are only available if an FMI board is installed in option slot 2.
Option 53.1 - Auxiliary input 1 (PM7-8) zero (0 – 999)*
Option 54.1 - Auxiliary input 2 (PM5-6) zero (0 – 999)*
These are the measured values that correspond to the minimum signal level (4mA) at the 4-20mA
AUX1 (PM7-8) & AUX2 (PM5-6) inputs on the FMI board. They are only available if options 53.0
/ 54.0 are not set to zero.
Option 53.2 - Auxiliary input 1 (PM7-8) span (0 – 999)*
Option 54.2 - Auxiliary input 2 (PM5-6) span (0 – 999)*
These are the measured values that correspond to the maximum signal level (20mA) at the 4-20mA
AUX1 (PM7-8) & AUX2 (PM5-6) inputs on the FMI board. They are only available if options 53.0
/ 54.0 are not set to zero.
Option 53.3 – Auxiliary input 1 (PM7-8) high alarm value (0 – 999)*
Option 54.3 – Auxiliary input 2 (PM5-6) high alarm value (0 – 999)*
If an auxiliary input exceeds these values, the a high alarm will be activated. See option parameters
16.1 – 16.3 for details of how to output these alarms to an external relay.
