Table of Contents
Advertisement
FC6x0
Accuracy
8.4.2 For gases
In most applications, density at standard conditions is programmed into the transmitter
and used to calculate the standard volume flow based on mass flow.
If gas pressure is a known value, after entering a reference density, the transmitter is able
to calculate gas density from temperature and pressure as well (while assuming an ideal
gas).
Alternatively, gas density can be measured. In order to do so, it is necessary to adapt the
lower density limit value in the transmitter.
For most applications the direct measurement of the gas density will have less accuracy
as stated for liquids.
8.5 Accuracy of mass flow and density according to the order code
Accuracy for flow rate as well as density is selected via order code position 13. Here a
distinction is made between devices for measuring liquids and devices for measuring
gases. No accuracy for density measurement is specified for gas measurement devices.
8.5.1 For liquids
SITRANS FCT020
Order code
position 13
1)
Specified maximum deviation is achieved within the applicable measuring range for
density.
SITRANS FCT040
Order code
position 13
1)
Specified maximum deviation is achieved within the applicable measuring range for
density.
2)
Notice: In case of a spare sensor combined with a transmitter in use, the original
accuracy specification may be affected. For calibration services, please contact Siemens
Service department.
3)
Specified deviation of density is achieved within the following limits, see table below:
Q
of 1
min
in kg/h
Ambient temperature range
in °C (°F)
32 / 194
7 M E 4 4 x
-
7
5 6
Maximum deviation of
density
in g/l
6
4
Maximum deviation of
density
in g/l
6
4
2)
4
3
2)
3
2
2
1
2),3)
1
0.5
Limits for density specific D
FCS600 DN15
300
A5E52748375-AA, 2023/09
Accuracy of mass flow and density according to the order code
-
8 9 10 11
12
13 14 15 16
Maximum deviation D
1)
FCS600
DN15
0.2
Maximum deviation D
1)
FCS600
DN15
0.2
0.1
–
0.1
0.1
FCS600 DN25
FCS600 DN40
-10 – 50 (14 – 122)
-
Z
for mass flow
flat
in %
FCS600
FCS600
DN25
DN40
0.2
0.2
for mass flow
flat
in %
FCS600
FCS600
DN25
DN40
0.2
0.2
–
–
0.1
0.1
0.1
0.1
0.1
0.1
for mass flow
flat
FCS600 DN65
700
FCS600
DN65
0.2
FCS600
DN65
0.2
–
0.1
0.1
0.1
Advertisement
Table of Contents
