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New HIDS Drum Scales!
Click Here to Learn More!You are correct that the motion units follow the calibrated units. If your Hardy controller was calibrated in lbs, the motion tolerance will be in lbs. If your Hardy controller was calibrated in kg, the motion tolerance will be in kg.
The time base for calculating if the scale is in motion is one second. The length of time will be addressed in new releases. The HI4050CW only requires 40ms to verify a stable weight reading.
Your Hardy controller will take a reading and compare it to the reading one second earlier. If the weight reading difference between these two readings is greater than the motion tolerance, then the unit will indicate that it is in motion.
The typical motion tolerance calculation is 0.03% times the total load cell capacity. The quick guide to set the motion tolerance value is to divide the total load cell capacity by 10,000 and then multiply by 3. (Capacity x .0003) For example: 10,000 lb scale should have a motion tolerance of 3.
We use the 1:10,000 parts as a stable and repeatable weigh reading that should be your maximum movement on a scale system. You very well may have a quieter system, but when planning a systems ability staying conservative will eliminate surprises after the system is installed and enviromential contion changes.
You may require a different setting due to the considerations of your specific process.