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How do I choose between rope-mounted and under-car elevator load sensors?

Ask Time: 2024-11-06
Answer
Selection depends on the suspension arrangement, accessible mounting location and controller interface. Rope-mounted devices sense loading through the ropes, while under-car systems measure forces at designated support points. An engineer should confirm the measurement arrangement and calibration method for the particular elevator.
Answer Time: 2024-11-07

Derived Questions

What output should I specify for an elevator load weighing device?
Use the controller's documented input requirements, which may involve relay contacts, an analog signal or a communication interface. Also specify whether the system needs overload indication, load bypass or torque compensation information. Confirm each function instead of assuming all load sensors provide the same outputs.
Ask Time: 2024-11-11 Answer Time: 2024-11-12
Why does an elevator show overload when the cabin is empty?
Possible causes include incorrect zero calibration, changed cabin weight, sensor mounting problems or a wiring fault. Have a technician review the system after checking for mechanical issues. Simply increasing the overload threshold can conceal a fault and should not replace proper diagnosis and calibration.
Ask Time: 2024-11-09 Answer Time: 2024-11-09
Can an elevator overload sensor be replaced without changing the load weighing controller?
Possibly, but sensor type, excitation, output signal and supported measurement range must match the existing unit. Connector similarity is not enough. Provide both sensor and weighing-controller labels, wiring information and mounting details to determine whether a sensor-only replacement is suitable.
Ask Time: 2024-11-07 Answer Time: 2024-11-08
What data should I send when requesting an elevator overload sensor quotation?
Provide rated load, suspension layout, sensor location, rope details where relevant and the controller input specification. Include existing component codes for replacements. Ask the supplier to identify the sensor, processing unit, cables and calibration documentation included in the proposed package.
Ask Time: 2024-11-12 Answer Time: 2024-11-12
Does an elevator load weighing system need recalibration after cabin refurbishment?
Review calibration whenever changes affect the empty car weight or sensor installation. New flooring, wall panels or other equipment can alter the measurement baseline. Follow the specific load weighing system procedure and document the verified overload response before returning the elevator to service.
Ask Time: 2024-11-09 Answer Time: 2024-11-10