SITRANS WB300 Siemens

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, WP241 or SIWAREX FTC micro-processor-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.

Обзор



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.

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 m … 300 m
    (500 ft … 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.