Transcript NMIJ Flow Standards Section

Introduction of
Liquid Flow Standards Section
Fluid Flow Division
National Metrology Institute of Japan
(NMIJ)
Water Flow Facility
2
Overview of water calibration facility I - Bird’s-eye view
Overflow Head Tank
Feed Pumps
Circulation Pumps
Control Bldg.
Working Standard Flowmeters
Calibration Bldg.
Testing Bldg.
Prover Bldg.
5t, 500kg Weighing Tank Bldg.
Small Water Calibration Rig
50t Weighing Tank Bldg.
3
Hydrocarbon Flow Facility
4
Hydrocarbon Flow (Large)
Servo PD meter
Kerosene
SVP
Light oil
Chiller Unit
Storage tank
（Kerosene；43m3）
Test line
Heat exchanger
Pump
Diverter/
Weighing Tank/
Storage Tank
Balance
（Light Oil；43m3）
the fluctuation of
temperature for 10 min.
is less than 0.03 ºC
5
Flow Calibration Services at NMIJ
Water Flow
Size
Facility
Calibration Range
BMC (k = 2)
Small
10 kg Weighing Tank
0.002 m3/h to 1.2 m3/h
0.039 %
Large and
Medium
500 kg, 5 t and 50 t
Weighing Tanks
with Constant Head Tank
0.3 m3/h to 3000 m3/h
0.042 %
to
0.060 %
SuperLarge
Reference meters
Ball prover
750 m3/h to 12 000 m3/h
at 70 C
0.081 %
Hydrocarbon Flow (Kerosene and Light oil)
Facility
Calibration Range
BMC (k = 2)
Small
2 kg Weighing Tank
0.01 m3/h to 0.1 m3/h
0.03 % (mass)
0.06%(volume)
Middle
32 kg Weighing Tank
0.1 m3/h to 15 m3/h
Large
10 t and 1t Weighing Tanks
3 to 300 m3/h
0.02 % (mass)
0.03%(volume)
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