SITRANS WB300

SITRANS WB300 is a heavy-duty, full-frame four load cell belt scale used for process and load-out control. Rails not included with belt scale.

Область применения

SITRANS WB300 belt scale provides continuous in-line weighing on a variety of products in primary and secondary industries. It is proven in a wide range of tough applications from clinker (in cement production), to mining, iron, and steel.

The WB300’s proven use of shear beam style load cells results in fast reaction to vertical forces, ensuring instant response to product loading. This enables it to provide optimum accuracy and repeatability even with uneven loading and fast pan speeds.

Operating with Milltronics BW500, SIWAREX WT241, WP241, or FTC microprocessor-based integrators, the WB300 provides indication of flow rate, totalized weight, belt load, and belt speed of bulk solid materials. A speed sensor monitors conveyor pan speed for input to the integrator.

The WB300 is installed in a simple drop-in assembly and has a complete full length frame to ensure support during operation. Existing rails are then attached to the mounting points. Maintenance is kept to a minimum, with just periodic calibration checks required.

Чертеж

SITRANS WB300, dimensions in mm (inch)

Особенности

Outstanding reliability and repeatability
Fast reaction to product loading; capable of monitoring high product temperatures
Rugged construction
Shear beam design load cells with unique mounting do not react to horizontal forces from rollers/aprons

Схема подключения

SITRANS WB300 connections

Технические данные

Mode of operation
Measuring principle	Strain gauge load cells measuring load on pan conveyor rails
Typical application	Control in cement production
Measurement accuracy
Accuracy¹⁾	± 2 % or better of totalization over 33 … 100 % operating range
Repeatability	± 0.1 %
Medium conditions
Material temperature	-40 … +150 °C (-40 … +300 °F)
Apron design
Pan width	24 … 72 inch Equivalent to 600 … 1 800 mm in metric size
Pan speed	Up to 1 m/s (200 fpm)²⁾
Capacity	Up to 5 000 t/h (5 500 STPH) at maximum pan speed. Please contact a Siemens representative for higher rates.
Conveyor incline	± 20° from horizontal, fixed incline Up to ± 30° with reduced accuracy³⁾
Load cell
Construction	17-4 PH (1.4568) stainless steel construction
Degree of protection	IP67
Cable length	3 m (10 ft)
Excitation	10 V DC nominal, 15 V DC maximum
Output	2 ± 0.002 mV/V excitation (nominal) at rated load cell capacity
Non-linearity and hysteresis	0.02 % of rated output
Non-repeatability	0.01 % of rated output
Capacity
Maximum ranges	500, 1 000, 2 500, 4 000, 5 000 lb
Overload	150 % of rated capacity, ultimate 300 % of rated capacity
Temperature	-40 … +75 °C (-40 … +167 °F) operating range -10 … +40 °C (14 … 104 °F) compensated
Weight	Contact factory
Interconnection wiring (to integrator)	< 150 m (500 ft) 18 AWG (0.75 mm²) 10 conductor shielded cable > 150 … 300 m (500 … 1 000 ft) 18 … 22 AWG (0.75 … 0.34 mm²), 12 conductor shielded cable
Approvals	CE, RCM

¹⁾ Accuracy subject to: on factory approved installations the belt scale system’s totalized weight will be within the specified accuracy when compared to a known weighed material test sample. The test rate must be within the specified range of the design capacity and held constant for the duration of the test. The minimum material test sample must be equivalent to a sample obtained at the test flow rate for three revolutions of the belt or at least ten minutes running time, whichever is greater.

²⁾ Contact Siemens application engineering (factorysupport.smpi@siemens.com) for consideration of higher belt speeds.

³⁾ Review by Siemens application engineer required.

Полезное

ENG_471657.PDF