● Check that the temperature and pressure of the instrument are displayed properly
● Ask the customer about the inaccuracy and the basis for it; (for automatic control intermittent use the measurement will not be accurate)
● Whether the flow range used on site meets the requirements of the instrument, requesting a reference to the flow range of the brand name
● Whether the site installation meets the requirements of the straight pipe section, and whether the parameters should be referred to the manual
● Whether the site has moved the parameters by mistake
● Adjustment of the coefficient, which is inversely proportional to the flow rate
● Return to the factory for maintenance