Profile
The working group "Realisation of Liquid Flow Measurements" is responsible for the traceability of the unit flow rate of liquids to SI units. For this purpose the Hydrodynamic Test Facility (HDP) for water (300 l/h - 2100 m³/h) and a test rig for white spirit (600 l/h - 250 m³/h) are available. Additional test rigs traced back to the standards enable the testing of flow devices down to 1 l/h.
To ensure traceability of industrial test rigs members of the working group is active in the DKD. Furthermore, its staff represents PTB in national and international bodies and cimittees (DIN, EURAMET TC-F, WGFF).
Research/Development
Main fields of work of the working group are:
- Further development and quality assurance of the standard flow facilities of the department
- Conducting and participating in nationale and international comparisons to ensure consistency in liquid flow metrology
- Provision of transfer standards and investigations about their measurement stability
Recent research projects:
- Influence of dynamic measurement conditions on measurements at the Hydrodynamic Test Facility
- Determination of the measurement uncertainty of test rigs
- Influence of flow disturbances on transfer standards
Recent comparisons:
- Development of a set of transfer standards for flowmeter calibrations
- Pilot laboratory for DKD "Flüssigkeiten" 2017
- Putting a prover as reference into operation
- Preparation of an international key comparison for large flow rates up to 2500 m³/h
Services
Technical characteristics and calibration capabilities of the Hydrodynamic Test Facility (HDP):
| Measurands: | Volumetric flow | Assessment and calibration of flow sensors and volume resp. mass meters |
| Test liquid: | Water |
|
| Measurement modes: | Flying START / STOPP |
|
| Operation modes: | Operation with elevated tank | Constant pressure in the measurement section |
| Nominal diameters: | Measurement section A | DN 150 ... DN 400 |
| Flow rate ranges: | Measurement section A | 3 m³/h ... 2100 m³/h |
| Pressure range: | 0,2 MPa ... 0,6 MPa | (pump direct operation) |
| Temperature range: | 10 °C ... 35 °C | |
| Expanded measurement uncertainty | ± 0,02 % (for k=2) | |
Technical characteristics and calibration capabilities of the test rig for white spirit (MÖZ):
| Measurands: | Volume flow | Test and calibration of flow sensors and volume resp. mass meters |
| Test liquid: | White spirit |
|
| Measurement modi: | Flying START / STOPP |
|
| Operation modi: | Pump direct operation | Variable pressure in the measurement section |
| Nominal diameters: | DN 25 ... DN 150 | |
| Flow rate range: | | 0,6 m³/h ... 250 m³/h |
| Pressure range: | 0,2 MPa ... 0,6 MPa | (pump direct operation) |
| Temperature range: | 20 °C ... 23 °C | |
| Expanded measurement uncertainty: | ± 0,05 % (for k=2) | |