Generally, for newly started or normal production electrolytic cells, the voltage drop of cathode and anode is within a certain range. When the cathode and anode carbon blocks with unqualified assembly quality are put into production, the furnace bottom voltage drop and anode voltage drop increase, and energy consumption increases. Therefore, it is very necessary to strengthen the monitoring of assembly quality on the premise of ensuring the quality of assembly materials. The premise of strengthening the monitoring of assembly process is to be able to timely and accurately detect the voltage drop of the assembled cathode or anode carbon blocks, find unqualified, and deal with it in time to avoid unqualified carbon blocks from being put into the cell.

The measurement principle of JW-180 Iron Carbon Voltage Drop Detector developed by Jingwei Technology is to use full-bridge high-frequency constant-current power supply as the core current output, which is designed for the external load change, keeping the output current constant through internal adjustment, to avoid the current change or attenuation due to load change.

There is a phenomenon in the industry of using DC welding machines to check the quality of cathode assembly. The disadvantage is that the testing principle of the welding machine is the output of a voltage-stabilized source. This output can ensure that the voltage remains unchanged when the load (output current) changes, and the current output also changes accordingly, that is, the output current is not a constant value. DC welding is mainly used in the welding industry, which does not require a constant current. The current attenuation also changes uncertainly with the external load, and there is no basis for comparison and calculation.

• Multifunctional switch: Test current 200A/400A, test time can be switched.
• Accurate measurement: Adopting the latest power supply technology, it can continuously output large current for a long time.
• It overcomes the technical problems of unstable current and inaccurate measurement results of similar products.
• Strong anti-interference ability: under severe interference conditions, the display reading is stable.
• Printing function: no need for on-site data recording, test data can be printed.
• Easy to carry and move: small size and light weight.