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FC1x0
Accuracy
Ambient temperature range
in °C (°F)
8.5.2 For gases
SITRANS FCT020
Order code
Order code
position 13
position -Z
9
SITRANS FCT040
Order code
Order code
position 13
position -Z
1)
9
1)
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.
8.6 Volume flow accuracy
8.6.1 For liquids
The following formula can be used to calculate the accuracy of liquid volume flow:
D
D
V
Δρ
D
ρ
8.6.2 For gases
Accuracy of standard volume flow for gas with a fixed reference density equals the
maximum deviation D of the mass flow.
D
The specified accuracy is then only valid for reference gas density. Gas
composition changes can have different reference density leading to accuracy
deviation.
8.7 Accuracy of temperature
Accuracy of temperature depends on the sensor temperature range selected (see
Process fluid temperature range
32 / 168
Limits for density specific D
-10 – 50 (14 – 122)
7 M E 4 4 x
-
7
5 6
Maximum deviation D
N1A
Maximum deviation D
N2A
2
∆ρ
(
)
2
= D
+
×
100%
ρ
V
Maximum deviation of volume flow in %
Maximum deviation of density in kg/l
Maximum deviation of mass flow in %
Density in kg/l
= D
V
A5E52595189-AA, 2023/09
for mass flow
flat
-
8 9 10 11
12
13 14 15 16
for mass flow
flat
in %
0.75
for mass flow
flat
in %
0.5
[}
36]) and can be calculated as follows:
Volume flow accuracy
-
Z
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