SITRANS WW100

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SITRANS WW100 is a high-accuracy, low-capacity weighfeeder used for minor ingredient additives.

Область применения

SITRANS WW100 is one of the most accurate in-motion weighing systems on the market. It is specially designed for high accuracy
on light loading processes. The design eliminates material buildup to ensure accurate, reliable measurement.

The unique long length platform weigh bridge mounts directly to a corrosion-resistant platform load cell. An adjustable mechanical
shear gate profiles the material and fixes the correct material bed depth for a given material particle size. The belt speed can
be automatically adjusted to attain the correct feed rate.

Standard components include an anti-static food grade belt, gravity tensioned roller, tail pulley driven belt for maximum
weighing accuracy, belt tracking rollers, belt scraper and plow for self-cleaning.

Чертеж

SITRANS WW100, dimensions in mm (inch)

Особенности

High accuracy
High turn down ratio; 100 to 10 % of capacity
Corrosion resistant components
Fast and easy belt removal for replacement or cleaning
Simple installation, easy to clean and maintain
Pre-programmed drive for servo motor control

Схема подключения

SITRANS WW100 connections

Технические данные

Mode of operation
Measuring principle	Strain gauge load cell and digital speed sensor
Typical application	Control and monitor feed rates and blending in bulk chemicals, tobacco, food, and water treatment
Measuring accuracy
Accuracy¹⁾	± 0.25 … 0.5 %
Repeatability	± 0.1 %
Specified range	10 … 100 % based on speed
Design rate range	45 kg/h … 18 t/h (100 lb/h … 20 STPH)
Max volumetric flow	30 m³/h (1 060 ft³/h)
Medium conditions
Operating temperature	-10 … +55 °C (10 … 131 °F)
Material	Stainless steel [304 (1.4301) or 316 (1.4401)], bead blast finish (1 ... 6 µm, 40 ... 240 µin)
Load cells
Construction	17-4 PH (1.4568) stainless steel
Degree of protection	IP68
Excitation	10 V DC nominal, 15 V DC maximum
Output	2 mV/V
Non-linearity	± 0.02 % of rated output
Non-repeatability	± 0.01 % of rated output
Capacity	Stainless steel range: 6, 12, 30 kg
Overload	150 % of rated capacity
Temperature	Operating range: -40 … +65 °C (-40 … +150 °F) Compensated: -10 … +40 °C (15 … 105 °F)
Speed sensors
Optical encoder output	RS 422 (TTL) 5 V DC, 150 mA max. 500, 1 000, or 2 500 pulses per revolution (ppr)
Degree of protection	Standard: IP64 Stainless steel: IP66
Temperature	-10 … +70 °C (+14 … +158 °F)
Framework	Precision machined, stainless [304 (1.4301) or 316 (1.4401)] or mild steel Cantilevered design for easy belt replacement
Pulleys	115 mm (4.5 inch) diameter, crowned and lagged
Bearings	4-bolt flange mount on drive pulley 2-bolt threaded base pillow block on driven pulley
Belt speed	0.005 … 0.36 m/s (1 … 70 fpm)
Belt support	Slider bed frame
Belting	Polyester carcass with polyurethane top cover and static control with vulcanized endless finger splice for max. weighing consistency (standard); optionally available in blue and as low capacity belt; product temperature up to 100 °C (212 °C) Belt properties in compliance with food safety regulation (EU) 10/2011 and (EC) 1935/2004 Meets FDA 21CFR and Halal HACCP concept supported: resistant to hot water and ideal for frequent cleaning cycles Silicone High temp belt for hot material applications (product temp. up to 177 °C (350 °F), in compliance with (EU) 10/2011 and (EC) 1935/2004, meets FDA 21CFR
Belt tension	Counter-weighted stainless steel [304 (1.4301) or 316 (1.4401)] tensioning idler for consistent tension, required for high accuracy weighing Screw type, telescoper module with 25 mm (1 inch) travel, stainless steel 304 (1.4301)
Belt cleaning	PE-HD blade type with counterweight at the head pulley for cleaning product side of belt Return plow
Drive motor	0.24 kW (0,33 HP) synchronous servo gearmotor
Variable frequency drive: SINAMICS S110 servo motor controller (included with supply of WW100 based on ordering options)	1 Ph, 200 ... 240 V OR 3 Ph, 380 … 480 V MMC with Factory loaded program for fast installation and commissioning BOP for local control External 24 V DC power supply RS 232 connection port 4 DI, D0 PROFIBUS DP Starter software & connection drawings provided with documentation
Shipping weight	91 kg (200 lb) … 181 kg (400 lb) maximum
Approvals	CE, RCM Meets FDA requirements for food processing

¹⁾ Accuracy subject to: on factory approved installations the weigh feeder 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.

Reduction ratio selection table

Reduction (1:)	60 Hz fpm	60 Hz m/s	50 Hz fpm	50 Hz m/s
299	6.895	0.035	5.75	0.029
265.2	7.77	0.040	6.48	0.033
230.1	8.96	0.046	7.47	0.038
209.18	9.856	0.049	8.21	0.041
179.4	11.49	0.058	9.58	0.048
163.09	12.64	0.064	10.53	0.053
143	14.42	0.073	12.01	0.061
127.64	16.15	0.082	13.46	0.068
113.75	18.13	0.091	15.10	0.076
105	19.64	0.100	16.36	0.083
91.93	22.43	0.113	18.69	0.094
80.6	25.58	0.130	21.32	0.108
73.12	28.20	0.143	23.50	0.119
68.82	29.96	0.151	24.96	0.126
60.67	33.98	0.172	28.32	0.143
52.65	39.16	0.198	32.63	0.165
49.87	41.34	0.209	34.45	0.174
43.27	43.27	0.241	36.06	0.201
39.33	52.42	0.265	43.68	0.221
33.73	61.12	0.308	50.94	0.257
30.67	67.22	0.340	56.02	0.283
26.89	76.67	0.388	63.89	0.323

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