Mode of operation

Measuring principle

Strain gauge load cells and digital speed sensor

Typical application

Industrial and process applications in feeding, blending or rationing in gypsum manufacturing

Measuring accuracy

Accuracy¹⁾

± 0.5 % or better

Repeatability

± 0.1 %

Specified range

10 ... 100 % based on speed

Design rate range

4.5 ... 800 t/h (5 ... 880 STPH)

Max volumetric flow

1 284 m³/h (44 800 ft³/h)

Medium conditions

Operating temperature

-10 ... +55 °C (14 ... 131 °F)

Material temperature

-40 ... 200 °C (-40 ... 392 °F)

Material

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

Load cells

Construction

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

Degree of protection

• Stainless steel: IP67
• 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: 25, 50, 100, 250, 500 lb
• Nickel-plated range: 10, 15, 20, 30, 50, 75, 100 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

IP64

WS300 Output

See page 4/43 (optional)

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 VAC max.

Temperature

-30 ... +85 °C (-22 ... +185 °F)

Degree of protection

IP67

Framework

• Painted structural steel
• Cantilevered design for easy belt replacement

Pulleys

200 mm (8 inch) minimum, 508 mm (20 inch) maximum, pulley diameter crowned with 6 mm (? inch) min. rubber lagging on drive pulley for maximum traction

Idlers

Heavy-duty 100 mm (4 inch) CEMA C with precision ground ball bearings and triple labyrinth seals for longer life, CEMA D,E IMPACT where required

Belt speed

0.005 ... 0.36 m/s (1 ... 70 fpm)

Bearings

4 bolt flange style

Belting

• Heavy duty endless design for maximum weighing accuracy. SBR, Butyl or Nitrile material options
• Flat, B-section flanges or corrugated sidewall options

Belt tension

• Screw type, telescoper module with 150 mm (6 inch) minimum travel
• Gravity tensioned self-steering belt tracker (optional)

Belt cleaning

• Gravity tensioned UHMW blade at head pulley, for cleaning product side of the belt.
• UHMW blade type return plow at tail pulley

Drive motor

AC, TEFC, 10:1 CT inverter duty, drive motor with direct coupled flange mounted hollow bore KAF gear reducer, 1.2 service factor min.

Shipping weight

410 kg (900 lb) minimum

Approvals

• CE on all electrical components
• Hazardous approvals per configuration options.

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