1、 Operation steps

1. Installation and wiring

• Installation location selectionChoose a location with low vibration and easy observation to avoid water flow impact or strong electromagnetic interference. For example, install a sensor at one end of the drum shaft of the gate opening and closing machine to ensure that the sensor is synchronized with the movement of the gate.
• fixation methodConnect the sensor to the gate hoist using a coupling, wire rope, or chain wheel to ensure a secure connection. For example, fixing the sensor to the drum shaft through a coupling to prevent measurement errors caused by looseness.
• Line connection：
  • Use shielded cables to connect sensors and instruments, with the shielding layer reliably grounded to avoid signal interference.
  • Separate the wiring of power lines and signal lines, keep them away from power cables, and prevent electromagnetic interference. For example, the signal line is laid in a metal tube with a distance of ≥ 30cm from the power cable.
  • Connect the sensor, instrument, and power supply according to the wiring diagram in the instruction manual, ensuring that the wiring is correct and error free. For example, the RS485 communication interface needs to strictly correspond to the A+and B - terminals.

2. Parameter settings

• Initial calibration：
  • zero point calibrationWhen the gate is fully closed, press the "reset" button to set the current position to zero. For example, in the closed state of the gate, long press the "reset" button for 3 seconds, and the instrument will display "00.00" to complete the calibration.
  • Range calibrationWhen the gate is fully open, check whether the displayed value of the instrument is consistent with the actual range. If they are inconsistent, adjust the range parameters using the "Settings" button. For example, when the gate is fully open at a height of 10m and the instrument displays 9.8m, it is necessary to enter the range setting interface to correct it to 10.00m.
• Alarm value setting：
  • Set alarm values such as lower limit, preset 1, preset 2 (water level), preset 3, upper limit, etc. For example, setting 1 as the lower limit value for safe operation of the gate (such as 2m), when the gate opening is ≤ 2m, the instrument triggers an alarm and outputs a relay signal.
  • Enter the password (such as 0001) to enter the alarm parameter setting interface, adjust the values using the "Shift" and "Add" keys, and press the "Confirm" key to save.

3. Running operations

• Start and Stop：
  • Start the gate hoist and observe whether the instrument displays real-time changes in the opening value with the movement of the gate. For example, when the gate is opened, the instrument display gradually increases from 00.00 to the fully open value.
  • When stopping the gate movement, check if the instrument displays the current opening value stably without any jumps or fluctuations.
• Direction adjustment：
  • If the counting direction is opposite (such as a decrease in display value when the gate is opened), direction setting is required. For example, hold down the "confirm" button until "9.999" is displayed, and then press the "confirm" button again to switch the counting direction.

4. Data recording and transmission

• data recordingRegularly record the gate opening value and establish an operation log. For example, daily recording of the range of gate opening changes, alarm frequency, and handling status.
• data transmission：
  • Transfer data to PLC or upper computer through RS485 or 4-20mA interface. For example, configuring the Modbus RTU protocol with a baud rate of 9600 to achieve remote monitoring.
  • Check if communication is normal and ensure stable data transmission. For example, observe whether the instrument communication indicator light is flashing, or verify data by reading it through the upper computer software.

2、 Precautions

1. Installation precautions

• level calibrationThe installation surface of the sensor should be level with an error of ≤ 0.5 °. For example, use a spirit level to check the sensor base, adjust it to a horizontal position, and then fix it.
• anti-loosening measuresAll fixing screws need to be sealed with anti loosening glue to prevent loosening caused by vibration. For example, applying thread locking adhesive to the screw threads to ensure long-term stability during operation.
• environmental adaptability：
  • Avoid installation in high temperature, humid, or corrosive environments. For example, when installing outdoors, a protective cover needs to be added to prevent rainwater from entering.
  • When the ambient temperature exceeds the range (such as -25 ℃~+60 ℃), cooling or heating measures should be taken.

2. Precautions for use

• Operating Specifications：
  • When opening and closing the gate, it is necessary to operate the control cabinet buttons in sequence to avoid misoperation. For example, start the oil pump first, and then switch the gate opening and closing knob to the open position.
  • Prohibit over range operation to prevent damage to the sensor. For example, when the gate opening approaches upward, it is necessary to slow down and stop in advance.
• regular inspection：
  • Check daily whether the instrument display is normal and whether the wiring is loose. For example, observe whether the instrument values are stable and gently pull the wiring terminals by hand to check if they are secure.
  • Manually calibrate the zero point and range once a month to ensure measurement accuracy. For example, when using a standard ruler to compare instrument display values, if the error exceeds ± 1cm, recalibration is required.
• Waterproof and moisture-proof：
  • Check for water leakage in the instrument junction box after rain and promptly address it. For example, if water droplets are found inside the junction box, it needs to be opened, dried, and sealed.
  • Avoid prolonged exposure to humid environments to prevent circuit short circuits. For example, when installing in humid areas, choose instruments with protection levels of IP65 or higher.

3. Maintenance precautions

• Cleaning and maintenance：
  • Regularly clean the dust on the surface of sensors and instruments, and maintain good ventilation. For example, use a dry cloth to wipe the instrument housing and avoid using corrosive cleaning agents.
  • Clean the sensor probe to prevent oil contamination from affecting accuracy. For example, wipe the surface of the probe with an alcohol swab to ensure no oil stains adhere.
• Fault handling：
  • When displaying a jump, check if the wiring terminals are oxidized. For example, sand the oxide layer with sandpaper and reconnect it.
  • When there is no signal output, use a multimeter to check if the power supply voltage is normal. For example, if the voltage is below 12VDC, the power circuit needs to be checked or the power module needs to be replaced.
• Spare Parts Management：
  • Reserve commonly used spare parts (such as sensors and relays) for quick replacement. For example, stock 1 set of sensors and 2 relays to ensure timely repair in case of malfunction.
  • Regularly check the status of spare parts to prevent expiration and failure. For example, check the appearance and performance of spare parts every six months to ensure they are always available.