The following are common fault analyses and solutions for total organic carbon analyzers:
1、 Power supply and initialization failure
1. The instrument cannot be started
-Power issue: Check if the power cord connection is secure, try replacing the power adapter or testing at a different socket.
-Fuse blown: If the instrument does not respond, it may be due to internal fuse damage and the manufacturer needs to be contacted for replacement.
-Motherboard malfunction: Electronic components are damaged and require professional repair.
2. Abnormal display screen
-Display blurry or black screen: Check if the signal line is loose and unplug the connection line again; If it still doesn't work, it may be necessary to replace the LCD screen.
-Screen distortion or garbled text: Restart the instrument. If it does not recover, repair the motherboard or contact the supplier.
2、 Measurement deviation issue
1. The value is too high/too low
-Inaccurate zeroing: Before testing, it is necessary to complete the "peeling" operation to ensure that the platinum ring is out of contact with the hook.
-Sample contamination: Glass vessels or platinum rings that have not been cleaned thoroughly (such as residual oil stains and dust) need to be rinsed with distilled water and burned with an alcohol lamp until slightly red.
-Volatile liquid interference: Quickly complete the test to avoid concentration changes caused by liquid evaporation.
2. Poor repeatability
-White gold ring deformation: After high-temperature burning, it is prone to bending when in direct contact with liquid without cooling, and standard size ring tools need to be replaced.
-Environmental vibration: The instrument is not placed on a stable horizontal table, and shock absorbers need to be installed and surrounding interference sources need to be turned off.
3、 Mechanical and sensor failures
1. The lifting platform is stuck
-Wear of transmission components: Check the lubrication condition of the screw, clean foreign objects, and apply special lubricating oil; If the verticality deviates, professional calibration is required.
2. Sensor failure
-Sensitivity decrease: The sensor may age after long-term use and needs to be returned to the factory for calibration or replacement.
-Poor cable contact: Check if the signal line interface is oxidized, and if necessary, repair or replace it by welding.
4、 Software and automation failures
1. Automatic testing interrupt
-Improper threshold setting: Modify the "automatic stop condition" to lower the correction value to accommodate low surface tension samples.
-High viscosity sample restriction: Enable manual mode and measure after extending the stirring time.
2. Data loss or error reporting
-Program crash: Reinstall the control system after backing up important data; Frequent errors require detection of the memory module.
5、 Key points of daily maintenance
1. Cleaning standards
-Immediately clean the platinum ring (hard brushes are prohibited) and dry the glass dish after each use to avoid residual chemical reagents from corroding the equipment.
-Optical components (light guide tubes, lenses) should be wiped with a dust-free cloth, and touching the mirror surface with hands is prohibited.
2. Regular calibration
-Verify the force sensor with standard weights at least once a month, and obtain an annual certification report from the metrology institution.
-Record maintenance logs, including dates, fault symptoms, and handling methods.
The faults of the total organic carbon analyzer are mainly caused by operational negligence, environmental interference, or component aging. Through systematic troubleshooting (power supply → sensors → software) combined with preventive maintenance, the downtime rate can be significantly reduced. For complex issues such as motherboard damage and precision component calibration, it is recommended to prioritize contacting the original factory technical support to ensure safety.