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Repeatability
Formula for
ΔT = 0.5 °C + 0.005
specified
temperature range
ΔT
Standard and
Medium
T
pro
1.7
(3.1)
0,8
(1.5)
Fig. 11: Temperature accuracy
8.8 Repeatability
For liquids
When using default damping times, the specified repeatability of mass flow, density and
temperature measurements equals half of the respective maximum deviation.
R =
R
D
For gases
In deviation hereto, the following applies to mass and standard volume flow of gases:
R =
8.9 Calibration conditions
8.9.1 Mass flow calibration and density adjustment
Each SITRANS FC device comes with a standard calibration certificate.
Calibration takes place at reference conditions. Specific values are listed in the standard
calibration certificate.
Fluid
Density
Fluid temperature
Ambient temperature
Process pressure (absolute)
The accuracy specified is achieved at as-delivered calibration conditions stated.
×
│T
pro
Maximum deviation of temperature
Process fluid temperature in °C measured by SITRANS FC
3.0
(5.4)
2.5
(4.5)
2.0
(3.6)
1.5
(2.7)
1.0
(1.8)
0.5
(0.9)
0
-100
0
20
100
(-148)
(212)
(32)
(68)
-50
(-58)
D
2
Repeatability
Maximum deviation
D
1.25
- 20 °C│
200
300
(392)
(572)
260
T
pro
(500)
Reference conditions
Water
0.9 – 1.1 kg/l (56 − 69 lb/ft³)
10 – 35 °C (50 – 95 °F)
Average temperature: 22,5 °C (72.5 °F)
10 – 35 °C (50 – 95 °F)
1 – 5 bar (15 – 73 psi)
A5E52595189-AA, 2023/09
Accuracy
°C
(°F)
FC1x0
33 / 168
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