KROHNE IFC 020 Converter EN - Manual (Page 69)

Installation and operating instructions IFC 020
Current output same error limits as above, additionally ± 10 µ A
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 5 % of MV (1)
Current output < 0.01 3 % of MV (1) 0.025% of MV (1)1
Power supply < 0.02 3 % of MV 0.05 5 % of MV at 10% variation
Load < 0.01 3 % of MV 0.02 5 % of MV at max. permissible load,
see pages 6 and 7
(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.
Error limits at reference conditions 10.2
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 29104
Product water at 10 – 30°C/50 – 86°F
Electrical conductivity > 300 µ S/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 10x smaller than F
Inlet/outlet runs 10
x
DN/2
x
DN (DN = meter size)
Primary head properly grounded and centered
Calibrated on EN 17025 accredited calibration equipment in direct volumetric comparsion.
10/2
Type/Meter size Maximum error in % of measured value (MV) ... Curve
DN mm
DN 2.5 – 6
DN 2.5 – 6(1)
≥ DN 10
≥ DN 10
inch
1 / 10 ” – 1 / 4 ”
DN 2.5 – 6(1)
≥ 3 / 8 ”
≥ DN 10
v ≥ 1 m/s / ≥ 3 ft/s
≤ ± 0.5% of MV
DN 2.5 – 6(1)
≤ ± 0.3% of MV
≥ DN 10
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)
B
D
A
E
per 1 K / 1.8°F temperature
variation
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* IFS 6000 F (DN 2.5-4 and 1/10”-1/6”) additional error ±0.3% of MV