What to do when a thermal gas mass flow meter fails?
2022-07-22
Thermal gas flowmeter is divided into two types of pipeline and insertion type of connection, thermal gas flowmeter has been widely used in the market, our businessmen to buy a lot of thermal gas flowmeter, when we use the thermal gas flowmeter when there is a problem how to solve the problem, the machine malfunction and how to deal with it? Today we talk about how to do when the hot gas flowmeter failure, what are the methods of treatment.
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Problems and solutions:
Case 1、No display
1. No power supply 2. Instrument internal switching power supply is damaged 3. DC24V power supply is connected to the opposite 4. display inserted biased 5. display damage
Processing methods
①Turn on the power ②Turn on the 220VAC power supply, the power indicator does not light up, indicating that the switching power supply is damaged ③Detect the polarity of the power supply ④Re-insert the screen ⑤Check the power supply indicator, the indicator light is on, indicating that the screen is damaged, please contact the supplier
Case 2、Low flow rate
1. Probe direction is reversed 2. Sensor is dirty 3. Sensor is damaged 4. Flow parameters are set incorrectly
Processing methods
①Install the probe direction correctly ②Clean the sensor ③Return to the supplier ④Check the parameter setting
Case 3、Abnormal and fluctuating flow rates
1. Flow rate parameter is set incorrectly 2. Fluid nature is pulsating rotation 3. Dirty sensor 4. Damaged sensor
Processing methods
①Check the flow rate parameter setting ②Adjust the filter coefficient ③Clean the sensor ④Return to the supplier
Case 4、4-30mA output anomaly
1. 20mA range setting error 2. converter failure 3. wiring not looped
Processing methods
①Set the 20mA range correctly ②Back to Suppliers ③Check wiring
Case 5. Frequency output abnormality
1. Frequency parameters set incorrectly 2. converter is 3. connection line damage Processing methods
①Correctly set the frequency parameters ②Return to the supplier ③Check the connection line
Case 6, The alarm is abnormal
1. Instrument parameters are set incorrectly 2. Instrumentation is not configured alarm output function 3. relay damage
Processing methods
①Correctly set the alarm parameters ② Contact the supplier ③Return to the supplier
Case 7. RS-485 output abnormality
1. The baud rate and station number are set incorrectly 2. Polarity is reversed 3. Connection line is damaged
Processing methods
①Correct input ②Change polarity ③Check the connection line
Problems and solutions:
Case 1、No display
1. No power supply 2. Instrument internal switching power supply is damaged 3. DC24V power supply is connected to the opposite 4. display inserted biased 5. display damage
Processing methods
①Turn on the power ②Turn on the 220VAC power supply, the power indicator does not light up, indicating that the switching power supply is damaged ③Detect the polarity of the power supply ④Re-insert the screen ⑤Check the power supply indicator, the indicator light is on, indicating that the screen is damaged, please contact the supplier
Case 2、Low flow rate
1. Probe direction is reversed 2. Sensor is dirty 3. Sensor is damaged 4. Flow parameters are set incorrectly
Processing methods
①Install the probe direction correctly ②Clean the sensor ③Return to the supplier ④Check the parameter setting
Case 3、Abnormal and fluctuating flow rates
1. Flow rate parameter is set incorrectly 2. Fluid nature is pulsating rotation 3. Dirty sensor 4. Damaged sensor
Processing methods
①Check the flow rate parameter setting ②Adjust the filter coefficient ③Clean the sensor ④Return to the supplier
Case 4、4-30mA output anomaly
1. 20mA range setting error 2. converter failure 3. wiring not looped
Processing methods
①Set the 20mA range correctly ②Back to Suppliers ③Check wiring
Case 5. Frequency output abnormality
1. Frequency parameters set incorrectly 2. converter is 3. connection line damage Processing methods
①Correctly set the frequency parameters ②Return to the supplier ③Check the connection line
Case 6, The alarm is abnormal
1. Instrument parameters are set incorrectly 2. Instrumentation is not configured alarm output function 3. relay damage
Processing methods
①Correctly set the alarm parameters ② Contact the supplier ③Return to the supplier
Case 7. RS-485 output abnormality
1. The baud rate and station number are set incorrectly 2. Polarity is reversed 3. Connection line is damaged
Processing methods
①Correct input ②Change polarity ③Check the connection line
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