What are the common problems with Baode multi-channel transmitters
Date: 2025-05-22Read: 1
Burkert multi-channel transmitters may encounter the following common issues during use: -
No output display：
-
Power issueCheck if the power supply is reversed and ensure that the polarity of the power supply is correct. Measure the power supply of the transmitter and confirm if there is a 24V DC voltage. It is necessary to ensure that the power supply voltage to the transmitter is ≥ 12V (intelligent type) or ≥ 15V (ordinary type).
-
Damaged headerIf it is a transmitter with a header, check if the header is damaged. You can first short circuit the two wires of the meter head. If the short circuit returns to normal, it means that the meter head is damaged and needs to be replaced.
-
Circuit disconnection or incorrect instrument selectionIf there is no power supply, check if the circuit is disconnected or if the detection instrument is selected incorrectly (input impedance should be ≤ 250 Ω).
-
Abnormal output signal (such as ≥ 20mA or ≤ 4mA)：
-
Insufficient power supply voltageCheck if the transmitter power supply is normal. If it is less than 12VDC, check if there is a large load in the circuit. The input impedance of the transmitter load should comply with RL ≤ (transmitter supply voltage -12V)/(0.02A) Ω.
-
Improper range selectionConfirm whether the actual pressure exceeds the selected range of the pressure transmitter and select a pressure transmitter with an appropriate range again.
-
Sensor damageIf the pressure sensor is damaged, it needs to be sent back to the manufacturer for repair.
-
Incorrect pressure indication：
-
The precision of the reference pressure gauge is lowIf the precision of the reference pressure gauge is low, it is necessary to replace it with a higher precision pressure gauge.
-
Inconsistent rangeThe range of the pressure indicating instrument must be consistent with the range of the pressure transmitter.
-
Input wiring errorConfirm whether the input and corresponding wiring of the pressure indicator instrument are correct. If the input of the pressure gauge is 1-5V, a resistor with an accuracy of one thousandth or more and a resistance of 250 Ω must be connected to the input of the pressure gauge, and then connected to the input of the transmitter.
-
Pipeline blockage or impuritiesIs there sand, impurities, etc. blocking the pipeline? Impurities can affect the measurement accuracy. It is necessary to clean impurities and add a filter screen in front of the pressure interface.
-
The temperature of the pipeline is too highIs the temperature of the pipeline too high? The operating temperature of the pressure sensor is -25~85 ℃, but in actual use, it is best to use it within -20~70 ℃. Buffer tubes can be added for heat dissipation. It is best to add some cold water inside the buffer tube before use to prevent overheated steam from directly impacting the sensor, which may damage the sensor or reduce its service life.
-
Installation issues：
-
Improper installation positionThe installation position of the transmitter below the measuring pipeline may result in inaccurate measurements. In actual installation, it should be ensured that the height of the transmitter is consistent with that of the measuring pipeline to avoid static pressure differences caused by uneven height of condensed water.
-
Blockage or leakage of pressure conduitIn pressure measurement, sometimes the indicated pressure does not change with the operating conditions. After opening the drain valve, there is only a small amount of sewage and no water flows out. This is because there is a small amount of floating dust in the water quality or compressed air, which enters the pressure pipe and settles with the water flow. Over time, the wall of the pressure pipe will corrode and accumulate scale, leading to blockage. At the same time, excessive discharge of steam pipelines can easily lead to steam leakage at various joints on the pressure pipe.
-
Interference issue：
-
electromagnetic interferenceIn the measurement of exhaust pressure in air compressors, the fluctuation of the exhaust pressure signal is relatively large, which may be due to the cable routing being introduced into the control room through the cable tray next to the high-end room, and there is a large amount of electromagnetic interference around it. Shielded control cables can be re installed to avoid power cables.