Ramsey* Series 14 Belt Scale System introductionThermo Scientific Ramsey Series 14 Belt Scale System is specifically designed for high accuracy or basis-of-payment applications requiring certification by government and regulatory agencies.
It incorporates the Ramsey 10-14 low-deflection, full-floating unitized weighbridge and the Ramsey 61-12C belt speed sensor. Both are well-proven on hundreds of precision belt weighing installations. It also utilizes the Ramsey Micro-Tech 2301 or 3301 electronic integrator and the Ramsey 2301-D load cell exciter/digitizer, which are the products of 50 years of design and application experience with high-accuracy belt scales.
Ramsey* Series 14 Belt Scale System Specifications
| Weigh span | Three- or four-idler suspension; 2,743mm (108 in.) minimum weigh span |
| Clearance requirements | Fits any standard conveyor; No space required above belt line |
| Idlers | Normally furnished by customer; Thermo can supply idlers upon request |
| Conveyors sizes | 457 to 2,134mm (18 to 84 in.) or 400 to 2,000mm (15.75 to 78.75 in.) belt widths |
| Weighbridge construction | Mechanical steel tubing |
| Weighbridge mounting | Eight bolts (four per support beam) to conveyor stringers |
| Ramsey 2301-D Load Cell Digitizer/Exciter | |
| Digitizer type | Continuous electronic load cell to digital signal digitizing |
| Enclosure | NEMA 4, 14-gauge steel |
| Circuit construction | "68332" 32-bit microprocessor with up to 512 Kb ROM (program) and 512 Kb RAM |
| Power requirements | 115/230 VAC selectable, 50/60 Hz |
| Input Output | 600, 9600, 19.2 k, 38.8 k baud RS-485; Compatible with Ramsey Micro-Tech 2301 or Ramsey Micro-Tech 3301 Integrators |
| Communication Input/Output | Sockets for four OPTO-22 I/O modules |
| Calibration | None required |
| Operating temparature | -40°C to +50°C (-40°F to +122°F) |
| Temperature sensitivity | -10°C to +50°C (+14°F to +122°F): Zero: 0.15 µV/°C (0.08 µV/°F) maximum Span: 4 ppm/°C (2.22 ppm/°F) maximum -40°C to -10°C (-40°F to +14°F): Zero: 0.15 µV/°C (0.08 µV/°F) maximum Span: 8 ppm/°C (4.44 ppm/°F) maximum |
| Accuracy | Within 0.044% of load cell capacity over full temperature range of -40°C to +50°C (-40°F to +122°F); Within 0.022% of load cell capacity over full temperature range of -10°C to +50°C (+14°F to +122°F) |
| Linearity | Better than 0.01% of net, for inputs from 0 to 105% of full scale |
| Speed input | 0-2000 Hz; Compatible with Ramsey 60 Series Speed Sensors |
| Isolation | Load cell and speed sensor inputs are optically isolated from other circuits |
| Load Cells | |
| Quantity | Four load cells in parallel |
| Enclosure | Environmentally-protected "S" type cell |
| Mounting | Tension |
| Excitation | 10 VDC ±5% |
| Output | 3 mV/V ±0.1% |
| Non-linearity | < 0.03% FS |
| Non-repeatability | 0.1% FS |
| Hysteresis | < 0.02% FS |
| Operating temperature | -54°C to +93°C (-65°F to +200°F) |
| Temperature sensitivity | Span 0.0014% FS/°C (0.0008% FS/°F) Zero 0.0027% FS/°C (0.0015% FS/°F) |
| Overload | Safe to 150% of load cell capacity; Ultimate to 300% FS; Sideload 50% FS |
| Rating | FM Approved for Class II, Div. 1 & 2, Groups E, F & G; NTEP Type III, 5000 divisions; OIML |
| Ramsey 61-12 Digital Speed Sensor | |
| Type | Digital, brushless |
| Mounting | Direct to 15.88mm (0.625 in.) diameter stub shaft on tail pulley, bend pulley, or return roll |
| Housing | Weather-tight, epoxy finish, cast aluminum |
| Mounting hardware | Supplied with coupling, restraint arm and restraint spring |
| Shipping weight | 3.6 kg (8 lbs.) |
| Approval[s] | FM Approved for Class I, Div. 2, Group D; Class II, Div. 1 & 2, Groups E, F & G |
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