Siemens SITRANS FX330 - Gross heat measurement (optional)

DEVICE DESCRIPTION 2
21
SITRANS FX330
www.siemens.com/flow08/2022 - A5E36751269-AG EN
2.2.8 Gross heat measurement (optional)
This functionality enables the calculation of the heat amount, which is carried by hot water,
saturated or superheated steam in energy supply systems without external flow calculators.
The gross heat calculation is based on the temperature-depending enthalpy of steam or hot
wa
ter and the mass flow rate. The exact mass flow rate is measured by the vortex flowmeter,
and the enthalpy tables are programmed in the device. The gross power flow rate is calculated
within the device according to the following formula:
Gross power [Q
H
] = mass flow [Q
m
] x enthalpy [H]
The absolute hot water and steam supply, as well as the energy, can be monitored internally via
a
totalizer by integration of the measured heat flow over time.
INFORMATION!
Heat quantity calculation is an optional feature, which can be unlocked subsequently in menu
"C
6.3 Extras" if not unlocked by order. Please contact the manufacturer to obtain the four digit
code required to enable this feature.
For programming example refer to Gross heat measurement on page 90
.