Frequently Asked Questions: Smart Slings
Answer:The Smart Sling® system will immediately alert users of an overload situation. The laptop monitoring your Smart Slings will display a red “Overload” alert on the screen if an overload is detected in any of your Smart Slings. Overload Alerts will also immediately be transmitted through text message and email to any registered users on the system who have been designated to receive alerts. These text and email alert messages will be received regardless of location.
In the event of an overload situation, the overloaded smart sling must be returned to an Authorized Slingmax® Smart Sling repair station. If the sling passes inspection and proof load, then the Smart Sling® system will be reset and the sling can be put back into service.
We developed our own radio frequency protocol that runs on the 915 MHz Industrial, Scientific, and Medical (ISM) band. It runs at a lower frequency than Wi-Fi or Bluetooth, and we have incorporated frequency hopping into the software. The system has access to 64 channels within the 915 MHz system and it hops across these channels every 400 milliseconds to avoid interference.
Sling Overload Sensor
Sling Overload Sensor
It is easy to expand the range of your system by adding additional base stations.
In the event of an overload, the Smart Sling® mechanical system immediately reacts, causing the Sling Overload Sensor to emit an overload signal to the laptop indicating that the load on the sling has exceeded over twice its rated capacity.
A Load Moment Indicator (LMI) is designed to monitor the entire load, which only protects your crane. Load cells and Load Moment Indicators will tell you the load applied, however they will NOT tell you if you have overloaded anything. Neither a load cell or an LMI will monitor the condition of every sling during the lift. Smart Sling monitors loads on each individual sling in your lift plan. Individual slings may be overloaded due to variables such as improper rigging, extreme sling angles, dynamic loading, and uneven load distribution. Any of these may cause one or more individual slings to be overloaded while the total load remains below the capacity of the crane.