Yokogawa 415 Steam and Gas - Manual (Page 32)

Example 8
A differential pressure transmitter across an orifice is designed to
output 20mA at 10,000 kgs/hour at a reference pressure of 1300
kPa (abs) and specific weight of 216.05 dm
3
/kg. The flowrate is
required in kg/hour and the calorific value in MJ/hour. What are
the main parameters to be programmed?
From the steam tables at 1300 kPa (abs) and a specific weight of
216.05 dm
3
/kg, the temperature can be calculated as 350°C, and is
in a superheated state. Hence, steam measurement via a 4-20mA
input with square law relationship is selected and the following key
parameters are programmed:
Units SI Units
Span 10,000
Base Temperature 350°C
Base Pressure 1300 kPa
Timebase hours
Steam Superheated
30 Operation