Mode of operation

Measuring principle

Strain gauge load cells and digital speed sensor

Typical application

Control and monitor feed rates and blending of minerals or powdered additives into a process

Measuring accuracy

Accuracy¹⁾

± 0.5 % or better

Repeatability

± 0.1 %

Specified range

10 … 100 % based on speed

Design rate range

0.45 … 100 t/h
(1 000 lb/h … 110 STPH)

Max volumetric flow

120 m³/h (4 237 ft³/h)

Medium conditions

Operating temperature

-10 … +55 °C ( 14 … 131 °F)

Material

Mild steel or stainless steel [304 (1.4301) or 316 (1.4401)], bead blast finish (1 ... 6 ?m, 40 ... 240 ?in)

Load cells

Construction

17-4 PH (1.4568) stainless steel or nickel plated alloy steel

Degree of protection

• Stainless steel: IP68
• Nickel plated alloy steel: IP66

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
• Nickel-plated range: 10, 15, 20, 30, 50 kg

Overload

150 % of rated capacity

Temperature

• Operating range: -40 … +65 °C (-40 … +150 °F)
• Compensated: -10 … +40 °C (15 … 105 °F)

Speed sensor

Optical encoder output

RS 422 (TTL) 5 V DC, 150 mA
max. 500, 1 000, or 2 000 ppr

Temperature

-10 … +70 °C (14 … 158 °F)

Degree of protection

• Standard: IP64
• Stainless steel: IP66

C-flange mounted magnetic pulse generator output

Open collector, NPN, sinking output, max. 17 mA, 60 ppr

Temperature

-40 … +105 °C (-40 … +220 °F)

Degree of protection

IP67

Belt tracking switch

Aluminum spring rod (un-wired)

• 1 NO, 1 NC switch blocks
• Rated operating voltage 600 V AC max.

Temperature

-30 ... +85 °C (-22 ... +185 °F)

Degree of protection

IP67

Framework

• Precision machined, stainless [304 (1.4301) or 316 (1.4401)] or mild steel
• Cantilevered design for easy belt replacement

Pulleys

152 mm (6 inch) diameter with 6 mm (? inch) neoprene lagging

Belt speed

0.005 … 0.36 m/s (1 … 70 fpm)

Belt support

Edge of flat bar eliminates material buildup

Bearings

• 2-bolt flange mount on drive pulley
• 2-bolt threaded base pillow block on driven pulley

Belting

• Polyester carcass with polyurethane top cover and static control with vulcanized endless finger splice for maximum weighing consistency (standard); optionally available in blue
• Maximum rated material temperature 82 °C (180 °F)
• Silicone HT belt rated for max. material temp. of 177 °C (350 °F)

Belt tension

Screw type, telescoper module with 150 mm (6 inch) travel - mild or stainless steel 304 (1.4301)

Belt cleaning

• PE-HD blade type with spring tensioning at head pulley
• Return plow
• Cleaning brush, optional

Drive motor

AC gearmotor, optionally available in food grade coating or stainless steel 

Shipping weight

280 kg (600 lb) minimum

Approvals

• Declaration of incorporation of partly completed machinery acc. directive 2006/42/EC
• Stainless steel options meet FDA requirements for food processing
• 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
• CE on all electrical components Hazardous approvals per configuration options

Note: weighfeeder as a whole is not approved for hazardous locations only electrical components.