KROHNE BATCHCONTROL 5014 C - Manual (Page 24)

Installation and operating instructions 24 BATCHCONTROL
6.4 Error limits at reference conditions
F
= Error in % of MV
MV = measured value
Pulse output DN 2.5 – 6 / 1 /
10
“ – 1 /
4
“ DN 10 – 40 / 3 /
8
“ – 1 1 /
2
“
at flow velocity of ...
v
≥ 1 m/s ≥ 3.3 ft/s
F < ± 0.5 % of MV F < ± 0.3 % of MV
v < 1 m/s < 3.3 ft/s F < ± 0.4 % of MV + 1 mm/s F < ± 0.2 % of MV + 1 mm/s
< ± 0.4 % of MV + 0.04 inch/s < ± 0.2 % of MV + 0.04 inch/s
Repeatability Filling time T
F
Standard deviation
σ
1.5 s < T
F
≤ 3 s ≤ 0.4 %
3.0 s < T
F
≤ 5 s ≤ 0.2 %
5.0 s < T
F
≤ 0.1 %
Reference conditions (similar to EN 29 104)
Liquid product
water +20 °C / +68 °F
Straight inlet/outlet runs 10× DN / 5 × DN (DN = meter size)
Valve closing time variation < 1 ms
Flow velocity 1 m/s = 3.3 ft/s
Volumetrically wet calibration on EN 17025 accredited calibration rigs.
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