Views: 0 Author: Site Editor Publish Time: 2025-06-06 Origin: Site
The electrical system inspection of fume hoods is an important link to ensure laboratory safety and the normal operation of fume hoods. The following are some steps and key points for inspecting the electrical system of a fume hood:
Power-off inspection
Before conducting any electrical system inspection, be sure to turn off the power of the fume hood and unplug it to ensure safety.
Visual inspection:
Observe whether there are obvious damages or deformations in the electrical system, such as exposed wires, loose plugs, damaged junction boxes, etc.
Sockets and plugs:
Check whether the socket is firm, whether the plug is stable after insertion, and whether the contact is good.
Avoid using damaged or aged sockets and plugs.
Switches and buttons:
Check whether the switches and buttons are flexible and whether the operation is normal, without any jamming.
Indicator light:
Check if the indicator light is on to confirm whether the power is connected.
Use a ground resistance tester to test whether the grounding resistance of electrical equipment meets safety requirements. Generally, the grounding resistance should be less than 4 ohms.
Use an insulation resistance tester to test whether the insulation performance of electrical equipment meets the requirements. Good insulation performance can prevent faults such as electrical leakage and short circuit.
Line connection:
Check whether the wiring connections of the electrical system are firm and there is no loosening or detachment.
Make sure the wiring is connected correctly to avoid electrical faults caused by incorrect wiring.
Line protection
Check whether the circuit has safety measures such as overload protection and short-circuit protection.
Fan operation:
Turn on the power of the fume hood and test whether the fan is operating normally without any abnormal noise or vibration.
Lighting system
Check whether the brightness of the lighting system is sufficient, usually no less than 400 lux.
Ensure that the lighting system can be turned on and off normally.
Control panel
Test whether all the function buttons on the control panel are working properly, such as wind speed adjustment, lighting switch, etc.
Professional operation
Electrical system inspections should be carried out by professionals with relevant qualifications to ensure operational safety and the accuracy of inspection results.
Regular maintenance
Regularly inspect and maintain the electrical system of the fume hood to promptly identify and eliminate potential faults.
Records and Reports
Records should be kept during the inspection process, including the inspection date, the inspector, the inspection results, etc. Problems discovered should be reported in a timely manner and corresponding solutions should be taken.
