KROHNE IFC 110 Converter EN - Manual (Page 40)

40 IFC 110 F 05/2003
10.2 Error limits
Display, digital values, pulse output
F maximum error in % of measured value (MV), not typical values
v Flow velocity in m/s and ft/s
Reference conditions similar to EN 29 104
Product water at 10 – 30°C/ 50 – 86°F
Electrical conductivity > 300 µS/cm
Power supply (rated voltage) U
N
(± 2%)
Ambient temperature 20 – 22°C / 68-71.6 °F
Warm-up time 60 min
Max. calibration equipment error 10 × smaller than F
Inlet / outlet runs 10 × DN / 2 × DN (DN = meter size)
Flow sensor properly grounded and centered
Calibrated on EN 17025 accredit to calibration equipment in direct volumetric comparsion.
*
VARIFLUX 6000 F (DN 2.5 – 4
and 1/10’’ – 1/6’’)
additional error ± 0,3% of MV
MV Measured
Value
z
= 1 mm/s = 0.04 inch/s
Flow Meter size Standard details Option (extra charge)
sensor DN mm inch v ≥ 1.0 m/s v < 1.0 m/s Curve v ≥ 1.0 m/s v < 1.0 m/s Curve
v ≥ 3.3 ft/s v < 3.3 ft/s v ≥ 3.3 ft/s v < 3.3 ft/s
VARIFLUX 2.5- 6 1 /
10
- 1 /
4
± 0.5% of MV ± 0.4% of MV + z C – – –
6000 F 10 - 80 3 /
8
- 3 ± 0.3% of MV ± 0.2% of MV + z B – – –
PROFIFLUX 2.5- 6 1 /
10
- 1 /
4
± 0.5% of MV ± 0.4% of MV + z C – – –
5000 F 10 - 100 3 /
8
- 4 ± 0.3% of MV ± 0.2% of MV + z B ± 0.2% of MV ± 0.1% of MV + z A
ALTOFLUX 10. - 25 3 /
8
- 1 – –
4000 F 32 -1600 1 1 /
4
-64
± 0.3% of MV ± 0.2% of MV + z B
± 0.2% of MV ± 0.1% of MV + z A
ALTOFLUX
2000 F
150 - 250 6 -10 ± 0.3% of MV ± 0.2% of MV + z B ± 0.2% of MV ± 0.1% of MV + z A
ECOFLUX
1000 F
10 - 150 3 /
8
- 6 ± 0.5% of MV ± 0.4% of MV + z B – – –
M 900 10. - 25 3 /
8
- 1 – – –
32 - 300 1 1 /
4
-12
± 0.3% of MV ± 0.2% of MV + z B
± 0.2% of MV ± 0.1% of MV + z A
Current output same error limits as above, additionally ± 10 µA
Reproducibility and
repeatability 0,1% of MV, minimum 1 mm/s / 0.04 inch/s at constant flow
External influences typical values maximum values
Ambient temperature
Pulse output 0,003% of MV (1) 0,01 % of MV (1) per 1 K / 1.8° F
Current output 0,01 % of MV (1) 0,025% of MV (1)
}
temperature variation
Power supply < 0,02 % of MV 0,05 % of MV at 10% variation
Load < 0,01 % of MV 0,02 % of MV, at max. load, see Sect. 10.1
(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.