KROHNE IFC 020 K Installation And Operating Instructions Manual page 69

Display, digital values, pulse output
F maximum error in % of measured value (not typical values)
v Flow velocity in m/s and ft/s
Reference conditions similar to EN 29 104
Product
Electrical conductivity
Power supply (rated voltage)
Ambient temperature
Warm-up time
Max. calibration equipment error 10x smaller than F
Inlet/outlet runs
Primary head
Calibrated on EN 17025 accredited calibration equipment in direct volumetric comparsion.
Type/Meter size
DN mm inch
DN 2.5 – 6
1 / " – 1
10
DN 2.5 – 6(1)
DN 2.5 – 6(1)
≥ DN 10
≥
3 / "
8
≥ DN 10
≥ DN 10
Current output
Reproducibility and
repeatability
External influences
Ambient temperature
Pulse output
Current output
Power supply
Load
(1) All Krohne signal converters undergo burn-in tests, duration minimum 20 hours at varying ambient temperatures
– 20 to + 60°C/– 4 to + 140°F. The tests are controlled by computers.
water at 10 – 30°C/50 – 86°F
> 300 µS/cm
U (± 2%)
N
20 – 22°C/68 – 71.6°F
60 min
10 DN/2
x
properly grounded and centered
* IFS 6000 F (DN 2.5-4 and 1/10"-1/6") additional error ±0.3% of MV
Maximum error in % of measured value (MV) ...
v ≥ 1 m/s / ≥ 3 ft/s
≤ ± 0.5% of MV
/ "
4
DN 2.5 – 6(1)
≤ ± 0.3% of MV
≥ DN 10
same error limits as above, additionally ± 10 µA
0.1% of MV, minimum 1 mm/s / 0.04 inch/s at constant flow
typical values
< 0.003% of MV (1)
< 0.013% of MV (1)
< 0.023% of MV
< 0.013% of MV
Installation and operating instructions IFC 020
Error limits at reference conditions
DN (DN = meter size)
x
v < 1 m/s / < 3 ft/s
≤ ± (0.4% of MV + 1 mm/s)
≤ ± (0.4% of MV + 0.04 inch/s
≤ ± (0.2% of MV + 1 mm/s)
≤ ± (0.2% of MV + 0.04 inch/s)
maximum values
0.015% of MV (1)
0.025% of MV (1)1
0.055% of MV
0.025% of MV
Curve
B
D
A
E
}
per 1 K / 1.8°F temperature
variation
at 10% variation
at max. permissible load,
see pages 6 and 7
10.2
10/2