34  CI/FSS/FSV430/450-EN Rev. D | SwirlMaster FSS430, FSS450 VortexMaster FSV430, FSV450 
 
Operating mode / 
(order code) 
Description Additional parameters required  Parameter setting 
Gas Std/Norm Vol. / 
NG2 
Standard volume flow 
Operating pressure 
3) 5)
  Via analog input: 
Input/Output / Field Input / Analog In Value -> 
Pressure 
Via HART input: 
Input/Output / Field Input / Hart In Value -> 
Pressure 
Default setting for the pressure value: 
Device Setup / Plant/Customized / 
Compensation Setting -> Preset Pressure 
Operating temperature 
3) 5)
  With internal temperature sensor. 
No information required, the measured value 
from the temperature sensor is used. 
Default setting for the temperature value: 
Device Setup / Plant/Customized / 
Compensation Setting -> Preset Int.Temp 
Reference compression factor in the 
normal condition 
(AGA / SGERG only) 
Adjustment via DTM/EDD
 7)
 
Operating compression factor  Adjustment via DTM/EDD
 7)
 
Gas Mass (reference 
density) / NG3 
Gas mass flow, calculated using 
the reference density 
Reference pressure and reference 
temperature in the normal condition 
Device Setup / Plant/Customized / Gas Ref. 
Conditions 
Reference density  Device Setup / Plant/Customized / Gas Ref. 
Conditions, as a selection for "Ref. Density " 
Gas Mass (actual 
density) / NG3 
Gas mass flow, calculated using 
the actual density 
Operating density 
2) 3)
  Via analog input: 
Input/Output / Field Input / Analog In Value -> 
Density 
Via HART input: 
Input/Output / Field Input / Hart In Value -> 
Density 
Default setting for the density: 
Device Setup / Plant/Customized / 
Compensation Setting -> Preset Density  
 
2)  The highest priority of the device is to record the density via the analog input, as long as the analog input is activated as a density input. If the analog input is not 
available as a density input, the system attempts to record the density via the HART input. If both the analog input and the HART input are deactivated as a density 
input, the system uses the default density value. 
3)  The connection via the analog input or HART input is described in the chapter titled „Electrical connections“ on page 21. 
5)  The highest priority of the device is to record the temperature via the analog input, as long as the analog input is activated as a temperature input. If the analog input is 
not available as a temperature input, the system attempts to record the temperature via the HART input. If both the analog input and the HART input are deactivated 
as a temperature input, the system uses the default density value. 
7) If the selection "Gas linear." is set for the menu item Device Setup / Plant/Customized -> Gas Std. Mode, the compression factor is reset to 1.0. See also the chapter 
titled "Special operating modes" in the operating instruction.