(I) There is no display when the fluid is in normal activity, and the number of words in the total counter does not increase

 

1. Check the power cord, fuse, function selector switch and signal line for open circuit or poor contact

 

2. Check the external printing plate and contact parts of the indicator for bad contact

 

3. Inspection and detection coil

 

4. Check the external faults of the sensor. The above 1-3 tests are confirmed to be normal or have been removed, but there are still faults. Explain that the fault is outside the sensor flow system. You can check whether the impeller can touch the inner wall of the sensor and whether there are foreign objects stuck. , Whether the shaft and bearing are stuck or broken

 

(II). Turbine flowmeter processing plan

 

1. Use ohmmeter to troubleshoot

 

2. The inspection of printing board defects can adopt the exchange "spare plate" method, replace the defective board and then perform detailed inspection

 

3. Make a mark of the position of the detection coil on the sensor surface, unscrew the detection head, and use an iron piece to move quickly under the detection head. If the number of counters does not increase, check whether the coil is broken or the solder joint is unsoldered.

 

4. Remove foreign matter, and clean or replace damaged parts. After recovery, there should be no friction when blowing or turning the impeller by hand. After changing the bearings and other parts, re-calibrate to obtain new meter coefficients.