Shanghai Xiangchuan Weighing Apparatus Co., Ltd. tells you the precautions for electronic weighbridge. Maintenance method 1. Simple check of electronic scale fault 1. No display: Whether the internal battery undervoltage causes automatic shutdown (with built-in battery model).
Whether the AC power supply voltage matches the voltage indicated by the product. The fuse is blown (using an AC motor).
2, can not be charged: whether the AC power supply voltage is consistent with the voltage indicated by the product, whether the fuse is blown (using AC motor type).
3. Digital jitter: Whether the sensor connection is good or not, whether the sensor is damp, whether the sensitivity setting is too small, whether the AD conversion rate is set too high, whether there is vibration, wind blowing, etc., whether the weighing platform touches foreign objects.
4. Poor linearity: Whether the sensor protection device works linearly (with linear calibration model) Whether the weight used for linear calibration is correct (linear correction model), whether the sensor is overloaded.
5, can not print: whether the printer type is set correctly, whether the reading is stable, whether the stable mark is bright, whether the printer connection is plugged in, whether the printer power is on, and whether the printer is online (only 24-pin printer) ).
6, can not be accumulated: whether to return to zero before accumulating according to the cumulative key is stable.
7, can not communicate through the serial port: baud rate, transmission mode settings are correct, RS-232C connection is good, RS-232C connection is too long.
8, the boot does not return to zero: the automatic zero return range is set too small, whether there are items on the weighing platform.
9, manual zeroing is invalid: whether the manual zeroing range is set too small, the current reading is stable.
10, can not be weighed: whether the sensor connection is firm, whether it has been calibrated (linear correction model must first perform linear correction).
11. Whether to enter with the super user password (software protection model), whether the short circuit correction jumper (lead seal protection model).
12. Does not return to zero after unloading: Whether the zero tracking setting is too small, and whether the weighing platform touches foreign objects.
13, the backlight is invalid: whether the battery is insufficient, the current weight is less than Zui small weighing.
14, check weight is invalid: whether the current weight is less than the small amount of zui, check whether the tweet is turned on.
15. Booting tweet: Whether it has been calibrated, whether the sensor connection is intact, whether the checkweighing is set.
Second, several methods to determine the quality of the electronic scale sensor 1, first check whether the resistance of the sensor has changed; in general, beyond the nominal resistance of more than 6 ohms, it can be determined to be broken.
2, check the excitation voltage is not enough, especially when transmitting over long distances, the voltage loss is very serious, Zui is good to use 6-core sensor.
3. Check if there is any strong voltage around it.
4. Each line measures the resistance to ground. If the resistance is less than 500M, it can be judged to be damaged.
5, check the appearance of the sensor is not damaged, the appearance of deformation, corrosion is clear at a glance.
Observation Method The so-called observation method is mainly used to solve the problem of surface exposure. It includes observations on site (use environment, electronic truck scale status, etc.).
? Resistance test method should be related to the resistance test of the instrument, junction box, sensor, etc. before power-on to determine whether the relevant product is abnormal.
? Voltage test method After the instrument is powered, this method can be used to test the DC voltage of the junction box, sensor and other related products to determine whether the output voltage of the related product is abnormal.
? Meter prompt information judgment method Some instruments have automatic judgment function. If Err03 indicates overload, all loads must be removed.
Process Test Method The process test method mainly includes the above methods and is gradually checked. (subsequent)
If the alternative method cannot accurately determine the location of the fault by the above method, an alternative method may be used. A good product replaces the main suspect.
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