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**Elevator Maintenance and Safety Technical Operation Procedures**
The following procedures are designed to ensure the safety of elevator maintenance workers and to comply with national regulations such as the "Safety Technical Operation Regulations for Construction and Installation Engineering" issued by the State Council and the "Decision on Strengthening Construction Safety Production" issued by the State Construction Commission. These guidelines are also aligned with the Criminal Law of the People's Republic of China and the relevant provisions of the Beijing Municipal Labor Bureau's "Safety Inspection Rules." All personnel involved in elevator maintenance must strictly follow these rules, and violations may result in disciplinary action.
### **General Safety Regulations**
1. All employees, including apprentices, interns, contractors, and temporary workers, must be familiar with the safe operation procedures for elevator work and must not drink alcohol or engage in unnecessary conversation during work.
2. Elevator maintenance and repair operations must be clearly marked as "Overhaul" or "Maintenance."
3. Only the inspection and maintenance speed should be used during maintenance. Once the maintenance is complete, the staff should leave the site or move to a safe position before testing at normal speed.
4. Protective equipment must be worn correctly. Slippers, high heels, or bare feet are strictly prohibited. Work clothes should fit properly and not restrict movement.
5. The elevator must not carry passengers during any maintenance or repair work.
6. It is strictly forbidden for anyone to enter or exit the elevator car while it is in motion.
7. Opening the computer room control panel is generally not allowed. If necessary, the car’s position must be confirmed, and a dedicated person must monitor the floor level to ensure safety.
8. Each maintenance team must develop a detailed rescue plan for elevator failures based on the type of elevator they are responsible for. All technicians must be trained in these procedures to prevent errors that could lead to serious accidents. Regular training and practical drills are essential to maintain a high level of safety awareness.
### **Elevator Maintenance and Repair Safety Procedures**
**1. Working Inside the Car**
- Before entering the car, confirm that it is properly parked on the current floor. Do not rely solely on the floor indicator light—always check the hall door to avoid falling.
- After entering the car, check if the control panel buttons are functioning properly and if the emergency stop switch works.
- Never open the outer door when inspecting or maintaining the car. Close the door after checking the door lock to prevent others from falling in.
- If the hall door cannot be closed immediately, assign a guard or install a protective barrier with warning signs. Inform the user promptly to ensure safety.
- When working inside the car, avoid extending any part of your body beyond the car floor. If necessary, disconnect the emergency stop first to prevent malfunctions. Difficult tasks should be performed with power disconnected and proper safety measures in place.
**2. Working on the Top of the Car**
- Before entering the top of the car, confirm that the car is properly positioned on the desired floor. Check the floor indicator light and ensure the operator repeats the command before moving the elevator.
- When operating in the pit, always stand in a safe position to avoid being hit by the hoisting rope or balance chain.
- During pit work, the car must be stopped. If the car needs to be moved to the top or bottom, staff must remain in a safe position to avoid being struck by the counterweight.
### **Emergency and Failure Handling Procedures**
1. If the elevator is stuck and there are passengers inside, disconnect the power supply first, then safely release the passengers using the designated rescue method, fix the fault, and raise the car.
2. If the elevator is at the bottom and has passengers, disconnect the main power supply, release the passengers safely, and proceed to fix the issue.
3. For elevator cars:
- Disconnect the main power and release passengers according to the rescue procedure. If the car is more than 60 cm above the floor sill, do not allow passengers to exit unless a safe rescue method (e.g., from the top of the car) is available.
- In mid-floor situations, use the correct rescue procedure to safely release the passengers.
4. If the elevator doors do not close:
- Before fixing the issue, be prepared for the possibility that the car may move at any time. No passengers should be allowed in the elevator during this period. Maintain vigilance to avoid sudden starts.
- Never operate the elevator without closing the doors. If short-term door opening is required, assign someone to monitor the door to prevent falls.
5. If the elevator doors do not open:
- If there are passengers inside, inform them to stay calm and follow the technician's instructions. Do not open the door if the car is in an unsafe position.
- Manually opening the door should be done carefully to avoid passengers rushing out. Avoid opening the control panel door in the machine room unless absolutely necessary.
6. Under no circumstances should the elevator be operated at the locked point in the engine room. If necessary, only a short period of operation is allowed under the supervision of a qualified person, and any temporary wiring should be removed as soon as possible.
### **EC-2100 Elevator Speedometer Specifications**
The EC-2100 is a compact, lightweight, battery-powered hand-held device used for measuring elevator speed, adjustment, and inspection. Compared to its predecessor, the EC-900, the EC-2100 offers a doubled measurement range of up to 2000 m/min and a calculation time of just 10 ms, making it ideal for high-speed elevator testing.
It measures speed by gently touching the traction sheave of the elevator. The red LED display ensures easy visibility, even in low-light conditions. With optional accessories like the EC-0202 distance measurement function or the EC-0201 external detector, one person can perform the entire test independently.
Key features include data storage, pulse and analog output, maximum value retention, average calculation, and automatic power-off. The EC-2100 supports various configurations, including the optional KS-300 handheld tachometer, to suit different maintenance needs.
**Technical Specifications:**
- **Speed Range:** 0.1 – 2000.0 m/min | 1 – 20,000 r/min
- **Distance Measurement:** 0 to ±999 mm
- **Measurement Time:** 10 ms
- **Update Time:** 100 ms
- **Data Storage:** 10 sets of data
- **Battery Life:** Over 15 hours (at normal temperature)
- **Dimensions:** 60 × 162 × 38 mm
- **Weight:** ~423 g (excluding peripheral accessories)
**Optional Accessories:**
- EC-0201 External Detector
- EC-0202 Distance Measurement Function
- EC-0203 Trigger Device
- KS-300 Speed Contact Rod
- KS-400, KS-500, KS-800 Cycle Speed Rings
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*Editor: Hardware Business Network Information Center*