1、 Display type malfunction

1. No display
   • reasonBuilt in battery undervoltage causing automatic shutdown (models with batteries); The voltage of the AC power supply does not match the label; Fuse blown (AC power supply model); Circuit board malfunction.
   • processCheck the battery voltage or replace the battery; Confirm that the power supply voltage matches; Replace the fuse; Check the circuit board and repair it.
2. Digital Beats
   • reasonLoose or damp sensor wiring; The sensitivity setting is too small; The AD conversion rate is too high; Interference such as vibration and wind blowing; The weighing platform touches foreign objects.
   • processTighten the sensor wiring and prevent moisture; Adjust sensitivity settings; Reduce AD conversion rate; Eliminate environmental interference; Clean up foreign objects on the weighing platform.
3. Backlight is invalid
   • reason: Insufficient battery power; The current weight is less than the minimum weighing capacity; Backlight function not set or electronic component failure.
   • processCharging or replacing batteries; Increase the weight of the item to more than 9 times its sensitivity; Check the backlight settings; Repair electronic components.

2、 Power and charging faults

1. Unable to charge
   • reasonThe power supply voltage does not match the label; The fuse is blown; Charging cable disconnected; The battery is damaged.
   • processConfirm voltage matching; Replace the fuse; Check the charging cable and repair it; Replace the battery.
2. The startup does not reset to zero
   • reasonThe automatic zeroing range is set too small; There are items on the weighing platform; Improper zero tracking setting.
   • processAdjust the zeroing range; Remove items from the weighing platform; Check the zero position tracking settings.

3、 Weighing and calibration malfunction

1. Unable to weigh or inaccurate weighing
   • reasonLoose sensor wiring; Not calibrated (for models requiring linear calibration); The protective device for transportation has not been removed; There is a foreign object between the scale pan and the upper shell.
   • processTighten the sensor connection; Re calibrate according to the instructions; Dismantle the protective device; Clean up foreign objects.
2. Poor linearity
   • reasonThe sensor protection device has not been removed; No linear correction has been performed; Correction of weight errors; Sensor overload.
   • process: Release the protective device; Perform linear correction; Use the correct weights; Avoid overloading.
3. Unable to calibrate
   • reasonInsufficient calibration weights or excessive deviation; Not entered with superuser password (software protected model); Short circuit correction jumper not operated (lead seal protection model).
   • processUse sufficient and accurate weights; Enter the correct password; Operate the short-circuit jumper.

4、 Printing and communication malfunction

1. Unable to print
   • reasonPrinter type setting error; The reading is unstable; The printer connection is loose or not turned on; Only the 24 pin printer is not online.
   • processCorrectly set the printer type; Wait for the reading to stabilize; Tighten the connection and turn on the device; Ensure online connection.
2. Unable to communicate through serial port
   • reasonThe baud rate or sending method is set incorrectly; Poor or excessively long RS-232C connection.
   • processCheck communication settings; Tighten the connection or shorten the length.

5、 Other functional failures

1. Cannot accumulate
   • reason: Did not return to zero before accumulation; The reading is unstable when pressing the accumulate key.
   • processReturn to zero and then accumulate; Ensure stable readings.
2. Invalid weight check
   • reasonThe current weight is less than the minimum weighing capacity; The duplicate check beep function is not enabled.
   • processAdd weighing items; Enable the plagiarism detection beep function.
3. Power on beep
   • reason: Not calibrated; Loose sensor wiring; The weight checking function has been set up.
   • processCalibrate according to the instructions; Check the sensor wiring; Disable the weight check function.

6、 Mechanical malfunction

1. Deformation or misalignment of the scale body
   • reasonLong term overloading or external impact.
   • processAdjust the scale body to a horizontal position; Avoid overloading; Repair the deformed part.
2. Scale platform stuck
   • reasonLimit device contacts the scale body; There is a foreign object between the scale platform and the scale frame.
   • processAdjust the limit device; Clean up foreign objects.

7、 Environmental interference fault

1. Affected by electromagnetic interference
   • reasonThere are motors, frequency converters and other equipment nearby.
   • processStay away from sources of interference; Use shielded cables and single ended grounding.
2. temperature effect
   • reasonExcessive temperature changes in the environment or direct sunlight.
   • process: Avoid inharshUsed in a temperature environment; Use sunshade devices.