© Siemens AG 2015 Belt Scales Milltronics belt scales Milltronics MLC ■ Overview ■ Application The MLC is suitable for monitoring such products as fertilizer, tobacco, animal feed pellets, or sugar. The MLC’s proven use of parallelogram style load cells results in fast reaction to vertical forces, ensuring instant response to product loading. This enables it to provide outstanding accuracy and repeatability even with very light loading. The MLC may be easily installed in existing flat belt conveyors or belt feeders. Operating with Milltronics BW500, or SIWAREX FTC microprocessor-based integrators, the MLC provides indication of flow rate, total weight, belt load and belt speed of bulk solids materials on a belt conveyor. A speed sensor monitors conveyor belt speed for input to the integrator. When used in conjunction with Milltronics BW500 integrator with PID controller, the MLC may also be used in the food industry as part of a pre-feed control system for extruders, cookers and de-hydrators. Milltronics MLC is a low-capacity scale for light belt loading. ■ Benefits • • • • • • 4 Unique parallelogram style load cell design Designed for light product loading Compact and easy to install System includes weighing idler Stainless steel option Low cost of ownership Siemens WT 10 · Update 04/2015 4/5 © Siemens AG 2015 Belt Scales Milltronics belt scales Milltronics MLC ■ Technical specifications1) 2) Milltronics MLC Milltronics MLC Mode of operation Load cell Measuring principle Strain gauge load cell measuring load on flat belt conveyor idler Typical application Monitor fertilizer, tobacco, animal feed pellets, sugar, cereal Performance Construction 17-4 PH (1.4568) stainless steel construction with 304 (1.4301) stainless steel cover Degree of protection IP67 Cable length 3 m (10 ft) Accuracy1) ± 0.5 … 1.0 % of totalization over 25 … 100 % operating range Excitation 10 V DC nominal, 15 V DC maximum Repeatability ± 0.1 % Output 2 mV/V excitation at rated load cell capacity Non-linearity 0.03 % of rated output Hysteresis 0.05 % of rated output Non-repeatability 0.03 % of rated output Capacity 10 or 20 lb Overload 150 % of rated capacity, ultimate 300 % of rated capacity Temperature • -40 … +85 °C (-40 ... +185 °F) operating range • -10 … +60 °C (14 … 140 °F) compensated Mounting dimensions Identical for all capacities Hazardous locations Consult the factory Approvals CE, RCM, GOST-R Medium conditions Max. material temperature 85 °C (185 °F) Belt design 4 Belt width • 450 … 1 200 mm • 18 … 48 inch Belt speed 2.0 m/s (400 fpm) maximum2) Capacity Up to 50 t/h (55 STPH) Conveyor incline • ± 20° from horizontal, fixed incline • Up to ± 30° with reduced accuracy Idlers Conveyor idler Horizontal Idler diameter 50 or 60 mm (1.90 or 2.30 inch) Idler spacing 0.5 … 1.5 m (1.6 … 5.0 ft) 1) 2) 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. Contact Siemens application engineering ([email protected]) for consideration of higher belt speeds. 4/6 Siemens WT 10 · Update 04/2015 © Siemens AG 2015 Belt Scales Milltronics belt scales Milltronics MLC ■ Selection and ordering data Milltronics MLC belt scale Low-capacity scale for light belt loading that comes complete with a weighing idler. Article No. 7MH71267777 Click on the Article No. for the online configuration in the PIA Life Cycle Portal. Article No. Belt Scale Application Guidelines • English 7ML1998-5GA01 • French 7ML1998-5GA11 • German 7ML1998-5GA31 Belt width/Scale construction • Spanish 7ML1998-5GA21 Polyester painted mild steel Note: The operating instructions should be ordered as a separate item on the order. This device is shipped with the Siemens Milltronics manual DVD containing the complete operating instructions library. 18 inch (457 mm) 1A 24 inch (610 mm) 1B 30 inch (762 mm) 1C 36 inch (914 mm) 1D 42 inch (1067 mm) 1E 48 inch (1219 mm) 1F 500 mm (20 inch) 1G 650 mm (26 inch) 800 mm (32 inch) 1000 mm (39 inch) Spare parts Load cell, 10 lb (4.55 kg), 17-4 PH (1.4568) stainless steel construction with 304 (1.4301) stainless steel cover, includes hardware 7MH7725-1AA 7MH7725-1AB 1H Load cell, 20 lb (9.09 kg), 17-4 PH (1.4568) stainless steel construction with 304 (1.4301) stainless steel cover, includes hardware 1J Conduit replacement kit 7MH7723-1NA 1K FDA conduit replacement kit 7MH7723-1QL 1200 mm (47 inch) 1L 450 mm (18 inch) 1M Milltronics MLC calibration weight [Stainless Steel 304 (1.4301)] For scales with belt width of 18 inch or 500 mm or 450 mm Stainless steel 304 (1.4301), bead blast finish (1 ... 6 µm, 40 ... 240 µin) 2A 1.05 lb (0.47 kg) 7MH7724-1AL 24 inch (610 mm) 2B 1.63 lb (0.73 kg) 7MH7724-1AM 30 inch (762 mm) 2C 2.35 lb (1.06 kg) 7MH7724-1AN 36 inch (914 mm) 2D 3.21 lb (1.45 kg) 7MH7724-1AP 42 inch (1067 mm) 2E For scales with belt width of 24 inch or 650 mm 48 inch (1219 mm) 2F 1.38 lb (0.62 kg) 7MH7724-1AQ 500 mm (20 inch) 2G 2.15 lb (0.97 kg) 7MH7724-1AR 650 mm (26 inch) 2H 3.11 lb (1.41 kg) 7MH7724-1AS 800 mm (32 inch) 2J 4.24 lb (1.91 kg) 7MH7724-1AT 1000 mm (39 inch) 2K For scales with belt width of 30 inch or 800 mm 1200 mm (47 inch) 2L 1.72 lb (0.77 kg) 7MH7724-1AU 450 mm (18 inch) 2M 2.67 lb (1.21 kg) 7MH7724-1AV 3.85 lb (1.73 kg) 7MH7724-1AW 7MH7724-1AX 18 inch (457 mm) Load cell capacity 10 lb (4.55 kg) A 5.26 lb (2.37 kg) 20 lb (9.09 kg) B For scales with belt width of 36 inch or 1 000 mm Not specified1) X Weighing idler dimensions 2.05 lb (0.92 kg) 7MH7724-1AY 3.19 lb (1.44 kg) 7MH7724-1BA 50 mm (1.96 inch)2) 1 4.56 lb (2.07 kg) 7MH7724-1BB 60 mm (2.40 inch)3) 2 6.29 lb (2.83 kg) 7MH7724-1BC 1.90 inch (48.2 mm)4) 5 For scales with belt width of 42 inch or 1 000 mm Further designs Order Code Please add "-Z" to article no. and specify order code(s). Stainless steel tag [69 x 38 mm (2.7 x 1.5 inch)], Measuring-point number / identification (max 27 characters), specify in plain text. Y15 Application Eng. reference number (max. 15 characters), specify in plain text. Y31 2.38 lb (1.07 kg) 7MH7724-1BD 3.71 lb (1.67 kg) 7MH7724-1BE 5.35 lb (2.41 kg) 7MH7724-1BF 7.31 lb (3.29 kg) 7MH7724-1BG For scales with belt width of 48 inch or 1 200 mm 2.72 lb (1.22 kg) 7MH7724-1BH 4.23 lb (1.92 kg) 7MH7724-1BJ 6.06 lb (2.75 kg) 7MH7724-1BK 7MH7724-1BL Manufacturer's test certificate: According to EN 10204-2.2 C11 FDA compliant version. Conduit and fittings designed for food applications conforming to FDA/USDA standards K01 8.34 lb (3.75 kg) Operating instructions Article No. Note: Calibration accessories should be ordered as a separate item on the order • English 7ML1998-5FF01 • German A5E32007529 1) Only for quotation purposes, not a valid ordering option. 2) Available with belt width/scale contruction options 1G ... 1M, 2G ... 2M only. 3) Available with belt width/scale options 1G ... 1M only. 4) Available with belt width/scale contruction options 1A ... 1F, 2A ... 2F only Siemens WT 10 · Update 04/2015 4/7 4 © Siemens AG 2015 Belt Scales Milltronics belt scales Milltronics MLC ■ Dimensional drawings MLC belt scale Idler diameter C (location of removed idler) D Installation 20.6 (0.81) 64 (2.5) 4 x Ø11 (0.44) E 1) Plan View A Front View 4 B 1) For pan supported belts, the belt should be cut out to allow the MLC and at least two (preferably four) other idlers to be installed. Imperial designs [dimensions in inch (mm)] Scale size 'A' roller width 'B' dimension 'C' dimension 'D' dimension 'E' dimension 18 (457) 18 (457) 19 (483) 1.90 (48.3) 6.19 (157) 3.5 (89) 24 (610) 24 (610) 25 (635) 1.90 (48.3) 6.19 (157) 3.5 (89) 30 (762) 30 (762) 31 (787) 1.90 (48.3) 6.19 (157) 3.5 (89) 36 (914) 36 (914) 37 (940) 1.90 (48.3) 6.19 (157) 3.5 (89) 42 (1 067) 42 (1 067) 43 (1 092) 1.90 (48.3) 6.19 (157) 3.5 (89) 48 (1 219) 48 (1 219) 49 (1 245) 1.90 (48.3) 6.19 (157) 3.5 (89) Metric designs [dimensions in mm (inch)] Scale size 'A' roller width 'B' dimension 'C' dimension 'D' dimension 'E' dimension 450 (17.72) 450 (17.72) 500 (19.69) 50 (1.97) 158 (6.22) 96 (3.78) 500 (19.69) 500 (19.69) 550 (21.65) 50 (1.97) 158 (6.22) 96 (3.78) 650 (25.59) 650 (25.59) 700 (27.56) 50 (1.97) 158 (6.22) 96 (3.78) 800 (31.50) 800 (31.50) 850 (33.46) 50 (1.97) 158 (6.22) 96 (3.78) 1 000 (39.37) 1 000 (39.37) 1 050 (41.34) 60 (2.36) 158 (6.22) 96 (3.78) 1 200 (47.24) 1 200 (47.24) 1 250 (49.21) 60 (2.36) 158 (6.22) 96 (3.78) MLC, dimensions in mm (inch) 4/8 Siemens WT 10 · Update 04/2015 © Siemens AG 2015 Belt Scales Milltronics belt scales Milltronics MLC ■ Schematics A A 5:1 Conduit and box connector Green 'B' + SIG 'A' Shield 'B' White 'B' - SIG 'A' Shield 'A' Green 'A' + SIG 'B' 4 Customer junction box Shield White 'A' - EXC + EXC - SIG 'B' Load cell 'B' Red 'A' Red 'B' Black 'A' Black 'B' Load cell 'A' To integrator Note: Conduit and cable arrangement may differ from example shown. MLC connections Siemens WT 10 · Update 04/2015 4/9