- Whether the customer has moved the parameters
- Is the installation in accordance with the requirements
- Whether the flow rate is within the range
- Is the temperature and pressure display normal, if abnormal check steps refer to 5 or 6
- If the instrument is connected to an external power supply or output, remove the cable and observe the operation only under battery power.
- Consider the local atmospheric pressure. If the atmospheric pressure at the site is lower than the standard pressure, but the standard pressure is still used for the parameters in the instrument, the flow rate is fast. (except for adiabatic pressure changes)
- Note: If the flow is fast, ask the customer to pay attention to the instantaneous flow rate to show that the upper limit does not exist.
- Solution:
- Debug the coefficient, which is inversely proportional to the flow rate
- If the external power supply or output line interference causes the flow rate to be fast, the solution refers to 2
- If there is no problem with the instrument and no problem can be found on-site, return to the factory to calibrate whether the instrument itself is fast
- An approximate algorithm for calibration flow rate.
The f-frequency value can be seen on the secondary screen by pressing the SET key.
q — instantaneous flow rate at working conditions (m3/h)
f — frequency (HZ)
K — coefficient (times/m3)
Q — standard condition (Nm3/h)
Gauge pressure — field pipe pressure (kg)
1 — atmospheric pressure (kg)