KROHNE IFC 210 E-EEx EN - Manual (Page 81)

Part D Technical Data, Measuring Principle and Block Diagram Sect. 10.1
05/2002 IFC 210 E 81
PHDVXULQJDFFXUDF\
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 water at 10 – 30°C/ 50 – 86°F
Electrical conductivity > 300 mS/cm
Power supply (rated voltage) U
N
(± 2%)
Ambient temperature 20 – 22°C
Warm-up time 60 min
Max. calibration equipment error 10
×
smaller than F
Inlet/outlet runs 10
×
DN / 2
×
DN (DN = meter size)
Primary head properly grounded and centered
Calibrated on EN 17025 accredit to calibration equipment in direct volumetric comparsion.
* IFS 6000 F (DN 2.5 – 4 and 1/10’’ – 1/6’’)
additional error ± 0,3% of MV
Type/Meter size Maximum error in % of measured value (MV) ... Curve
DN mm inch v
≥
1 m/s /
≥
3 ft/s v < 1 m/s
DN 2.5 – 6*
1
/
10
’’ –
1
/
4
’’ * ≤
± 0.5% of MV
≤
± (0.4% of MV + 1 mm/s) B
≤
± (0.4% of MV + 0.04 inch/s
≥
DN 10
≥ 3
/
8
’’
≤
± 0.3% of MV
≤
± (0.2% of MV + 1 mm/s) A
≤
±(0.2% of MV + 0.04 inch/s)
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 % of MV (1)
Current output 0,01 % of MV (1) 0,025% of MV (1)
} per 1 K / 1.8° F
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. permissible
load, see Sect. 10.1
and 2.5
(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.