Seven Common Problems and Solutions of Electronic Crane Scales

1. The electronic crane scale cannot be turned on. Before the electronic crane scale is repaired, please make sure that the electronic crane scale is not caused by the problems of the fuse, power switch, power cord and voltage switch. Check whether the electronic crane scale transformer has AC110/220 input and AC18V output. Please remove the battery and turn on the AC power supply to find out if the battery voltage is insufficient. (Measure the battery voltage, it should be higher than 6V, please charge if it is lower than 5.5V, and please replace the battery when it is fully charged and runs out of power soon).

 

2. The display of the electronic crane scale is not good. Connect the LCD pins of the normal electronic crane scale in parallel with the LCD of the repaired electronic crane scale by hand, and then turn on the machine to observe whether the LCD of the normal crane scale has the same bad condition. If not, you can It is concluded that there is no problem with the LCD of the electronic crane scale. Check whether the CPU pins of the electronic crane scale are oxidized, cold welded or short-circuited. Whether the pins and holes of the LCD are oxidized, cold welded or short-circuited. Check whether the line between CPU and LCD is open.

 

3. The electronic crane scale does not return to zero to check whether the output signal value of the load cell is within the standard. If it is not included in the standard, please refer to the tenth item for compensation. If it cannot be compensated, please check whether the sensor is defective. Please follow the instructions in the manual for weight correction.

 

4. The electronic crane scale is not allowed to weigh the weight. Observe whether the internal code value of the crane scale is stable, whether there is friction in various parts of the load cell, whether the regulated power supply is stable, whether the op amp circuit is normal, and whether the circuit board of the A/D circuit has Foreign matter, whether the feedback resistor/capacitor/filter capacitor is defective or leaks. Check whether the output signal value of the electronic crane scale sensor is within the standard. If it is not included in the standard, please refer to the tenth item for compensation. Use weights to test whether the four feet of the weighing pan are evenly weighed. Please follow the instructions in the manual to do the weight calibration of the electronic crane scale.

5. The signal of the crane scale instrument is normal, and the display is 0kg. Without weighing, check whether the word negative scale appears in the upper left corner of the weighing control instrument. If this phenomenon occurs, restart after shutting down. Check whether the value set by the division value conforms to the national standard. The main purpose is that the sensor is in good contact with the ADF link plug. Check whether the sensor line is open circuit, and use the detection table are able to detect. Check whether the tonnage of the scale is consistent with the actual tonnage. Unplug the battery of the scale body, remove the instrument antenna, plug in the battery of the scale body, and use the remote control to switch the machine to see if it works. After the sixth step is completed, you can modify the channel if the check is normal.

 

6. The crane scale instrument can display the weighed weight, but it cannot print the list to check whether the accumulated weight is over 99 pounds. If it exceeds, it cannot be printed. Press the accumulated display-total clear-confirm to delete. If the printer fails, check whether the connection is disconnected or soldered, otherwise replace or repair. If the printing button is damaged, if there is no sound and no response after pressing, the keyboard is damaged and needs to be replaced. Ribbon upside down. The meter battery is low.

 

7. Other fault solutions of the crane scale The instrument cannot be charged. If the connection to the charger does not reflect (that is, there is no voltage display on the display window on the charger), it may be that the weighing control instrument is over-discharged (the voltage is below 1V), and the charger If it cannot be detected, you can press and hold the charger discharge button before plugging in the meter. There is no weighing signal after the instrument is turned on, please check whether the battery voltage of the scale body is normal, plug in the transmitter antenna, and turn on the power of the transmitter. If there is no signal, please check whether the channel of the instrument corresponds to the transmitter.

 


Post time: Sep-07-2022