GE Masoneilan 12420 Instruction Manual & Safety Manual page 69

APPENDIX C
SCREEN DESCRIPTION FOR ADVANCED SETUP MENU – 1/2
ADVANCED SETUP
FAILSAFE POSITION
DIRECTION
FAILSAFE POSITION LOW
FAILSAFE POSITION HIGH
SAVE
CANCEL
VARIABLE SETUP
MA LOW
MA HIGH
ENGINEERING UNIT:%
ZERO SHIFT:%
REDUCED SPAN: %
↓ CONTROLLER
CONTROLLER ON
CONTROLLER OFF
SIGNAL GENERATOR
DAMPING
DAMPING ON
DAMPING OFF
DAMPING:s
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Validate by pressing the * to enter the Advanced Setup menu.
Validate by pressing the * to define the failsafe position direction in case of activation of
Failsafe mode (severe faults).
Define the failsafe position in case of severe faults. The instrument will generate a current
safety signal below 3.6 mA. Fail Low position in mandatory for SIL certified instruments
Define the failsafe position in case of severe faults. The in strument will generate a current
safety signal above 21 mA. Fail High position is not available for SIL certified instruments (Fail
Low mandatory)
Validate by pressing the * to start the saving procedure of parameters previously entered in
the instrument memory.
Validate by pressing the * to cancel the parameters saving procedure.
Validate by pressing the * to enter the sub-menu to set the additional variables.
Validate by pressing the * to adjust the current equivalent to the Low Level position (REF L).
The value, generally 4 mA, must be between 3.8 mA and the high current signal value (MA
HIGH).
Validate by pressing the * to adjust the current equivalent to the High Level position (REF H).
The value, generally 20 mA, must be between the low current signal value (MA LOW) and 20.5
mA.
Validate by pressing the * to enter the sub-menu to define the level variable and select the
desired engineering unit (usually %).
Validate by pressing the * to set the zero of a reduced range. In case of an interface
instrument, when the Specific Gravities of Service [LSG SER] and [HSG SER] are different from
those of Calibration [LSG CAL] and [HSG CAL], zero shift is automatically set to the value
resulting from formula :
([LSG SER)- [LSG CAL])/ ([HSG SER]-[LSG SER])
Value ranges from -9999.9% to +9999.9%.
Validate by pressing the * to set the span of a reduced range. Value ranges from 0.0% to 99%.
Validate by pressing the * to enter the Controller sub-menu and define if the Controller
function is activated or not.
Note: only the Transmitter function is SIL certified.
The Controller function is activated
The Controller function is not activated
Validate by pressing the * to enter the sub-menu allowing to generate a loop current to a
defined value independently of true level measurement.
Validate by pressing the * to enter the Damping menu. This is a first order filtering function
which operates on the output current signal.
Activate first order Filtering function.
Deactivate first order Filtering function.
Validate by pressing the * to set the damping parameter which is a T63 time: time taken for a
63% response to a level step change. Damping time can be set between 0.1 s and 32 s.
Masoneilan 12400 Series Transmitter/Controller Instruction Manual | 67