The elliptical gear flowmeter is used to measure the flow rate of liquid filled in a pipeline under a certain pressure. It has the characteristics of simple structure, reliable use, high accuracy, no special requirements for the flow field inside the inlet and outlet pipelines, and a wide range of viscosity and flow rate of the measured medium.

After powering on this product, it is necessary to first check whether the screws in each part are loose. If they are loose, tighten them as soon as possible. After turning on the power, observe whether the power indicator light on the panel is on to check if the power is connected. Press the lifting button to check if it is normal. If it is normal, prepare different specifications of test mold support plates and upper pressure plates according to the needs of the test piece, adjust and tighten the column nuts and screws on the support plate on the workbench.

Before using an elliptical gear flowmeter, the following precautions should be taken:

1. The installation direction of the instrument should be consistent with the direction of the arrow on the instrument housing and the direction of liquid flow, and the installation position should be easy to read.

2. Instruments should be installed at room temperature as much as possible, and should not be installed in environments with harmful gases or strong thermal radiation to prevent damage to the counter part of the instrument.

3. The elliptical gear shaft in the instrument should be installed in a horizontal position as much as possible, that is, the reading dial should be installed in a vertical position (the front of the counter should be parallel to the ground), in order to reduce friction between the elliptical gear and the housing and reduce wear of the parts. Due to different installation positions, the counter (meter head) can be rotated 90 ° or 180 ° for ease of reading.

4. Before installing the instrument, the pipeline must be cleaned. In the entire pipeline system, if there is no strict filtering device, a filter should be installed in front of the instrument to prevent impurities from entering the instrument.

5. The instrument should be installed at the outlet end of the pump, and the flow control valve should be installed downstream of the instrument. When using, first open the upstream shut-off valve, and then slowly open the downstream flow control valve or shut-off valve. Sudden opening or closing is strictly prohibited.

6. The elliptical gear flowmeter should be filled with liquid when in use. There should be no gas mixed in the tested liquid, otherwise the mixed volume of gas and liquid will cause inaccurate measurement. When gas is mixed in the liquid, a gas separator must be installed upstream of the instrument.

7. The flow rate in the pipeline should not increase or decrease sharply, and phenomena such as pipeline vibration, hydraulic shock, and rapid pressure fluctuations should be avoided, otherwise it will affect the normal operation of the instrument.

8. When the flow rate exceeds the specified large flow rate, the wear of the elliptical gear increases with the increase of speed, and the pressure loss increases sharply. It should be avoided from use. Below low flow rates, although it can still be measured, the error increases. The starting flow rate of the flowmeter is about 2% of the large flow rate, and the normal working flow rate is preferably 70% -80% of the large flow rate.