BELT WEIGHER MAINTENANCE
BELT WEIGHER has become an important part of most bulk material handling facilities. However, being relatively unobtrusive in most conveyor systems, they are often overlooked or ignored after their initial installation. Lack of simple maintenance will potentially cause significant reduction in the accuracy capabilities of these instruments. Most belt weigher or belt conveyor scales can provide reliable result within ± ½% of their full‐scale rating. Belt conveyor scale that has been certified via the. This is defined as being within ¼% of actual material load and repeatable within a ¼% bandwith.
ElenTech Resources do establishment of a routine inspection procedure, including not only the belt conveyor scale, but the entire material handling system, will result in an increased confidence in the scale and ultimately greater control of the accuracy it is providing.
It is important to remember that the entire conveyor that the belt scale is installed in become part of the “Weighing systems”, and that any changes that occur or are performed within this conveyor can and probably will affect the performance of the scale. Therefore, in addition to a routine scale maintenance procedure it becomes imperative that all maintenance performed on the conveyor be reported to the individual or department responsible for the scale’s performance.
What makes a Belt Weigher System: we have an answer?
A belt scale system consists of 3 elements:
- they weigh frame, which measures instantaneous mass,
- a tacho which measures belt speed, and
- the belt weigher electronics which integrate both these inputs to determine flow rate and totalised weight.
Our belt weigher system thus integrates conveyor belt loading with conveyor belt travel to calculate the total amount of material that has been carried past the weighing system, and which also calculates the flow rate of material (almost) instantaneously. So, with a belt scale on your conveyor, you can see how much material has travelled this day, or this shift and you can also monitor your plant output in tons per hour, or some other convenient unit.
Belt Weighing systems (Belt Scales) are, however, much more accurate and must be maintained with much more care than a general instrument to achieve the accuracies which are necessary, typically 0.25% or 0.5%. As such, belt scales claim to be ‘weighing systems’ not general instruments and they do require quite a different mindset in their maintenance and care to achieve their promised accuracies. The calibration of a belt scale can be established by independently calibrating the weigh frame and the tachometer or the complete system can be calibrated with a test load of real material often termed a ‘live load’.
The role of ElenTech Resources belt weigher electronics set has grown considerably since the early days of belt weighing. Now one of the most important roles of the electronics set is to make calibration and maintenance of the belt weighing systems easier and more accurate.
Zero Setting
- The zero setting is how we subtract off this ever present but irrelevant weight so that only the weight of actual travelling material is measured.
ElenTech Resources recommends Maintenance Check List chart. Note that verification of the basic mechanics of the conveyor system itself is an integral part of the scale maintenance procedure. If you have any question regarding your Belt Weigher, please do not hesitate to contact ElenTech Resources office for service assistance