Technical specifications

Mode of operation

Measuring principle

Strain gauge load cells measuring load on belt conveyor idler(s)

Typical application

• MSI

Control in fractionated stone blending tunnels

• MMI

Custody transfer

Measurement accuracy

Accuracy¹⁾

• MSI

± 0.5 % or better of totalization over 20 вЂ¦ 100 % operating range

• MMI-2 (2 idler)

± 0.25 % or better of totalization over 20 вЂ¦ 100 % operating range

• MMI-3 (3 idler)

Note: available with system specification option D only

± 0.125 % or better of totalization over 25 вЂ¦ 100 % operating range

Repeatability

± 0.1 %

Medium conditions

Material temperature

-50 вЂ¦ +175 °C (-58 вЂ¦ +347 °F)

Belt design

Belt width

• 18 вЂ¦ 96 inch in CEMA sizes
• Equivalent to 500 вЂ¦ 2 000 mm in metric size
• Refer to dimensions section

Belt speed

Up to 5 m/s (1 000 fpm)²⁾

Capacity

Up to 12 000 t/h (13 200 STPH) at maximum belt speed. Please contact a Siemens representative for higher rates.

Conveyor incline

• ± 20° from horizontal, fixed incline
• Up to ± 30° with reduced accuracy³⁾

Idlers

Idler profile

• Flat to 35°
• Up to 45° with reduced accuracy³⁾

Idler diameter

50 вЂ¦ 180 mm (2 вЂ¦ 7 inch)

Idler spacing

0.5 вЂ¦ 1.5 m (1.5 вЂ¦ 5.0 ft)

Load cell

Construction

Stainless steel construction with 304 (1.4301) stainless steel cover

Strain gauge protection: polybutadiene

Degree of protection

IP67, IP65 on hazardous approved models

Cable length

3 m (10 ft)

Note: to calculate installation cable length subtract 3 048 mm (120 inch) from the "A" dimension

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

25, 50, 100, 250, 500, 750, 1 000, 1 250, 1 500, 2 000 lb

Overload

150 % of rated capacity, ultimate 300 % of rated capacity

Temperature

• -50 вЂ¦ +75 °C (-58 вЂ¦ +167 °F) operating range
• -40 вЂ¦ +65 °C (-40 вЂ¦ +150 °F) compensated
• -10 ... +40 °C (14 ... 104 °F) compensated on trade approved versions

Weight

See dimensions section

Interconnection wiring (to integrator, per MSI)

< 150 m (500 ft) 18 AWG (0.75 mmІ) 6 conductor shielded cable

> 150 m вЂ¦ 300 m (500 ft вЂ¦ 1 000 ft) 18 вЂ¦ 22 AWG (0.75 вЂ¦ 0.34 mmІ), 8 conductor shielded cable

Approvals

• CSA/FM Class II, Div. 1, Groups E,F,G and Class III
• ATEX II 2D Ex tD A21 IP65 T90 єC
• EAC Ex
• IECEx Ex tD A21 IP65 T90 єC
• CE, RCM, EAC, KCC, CMC, RTN

Metrology approvals

Measurement Canada, MID, OIML, SABS⁴⁾, NTEP⁵⁾, STAMEQ, GOST