The 475 is designed to meet or exceed the accuracy requirements of the National Institute of Standards and Technology (NIST) Handbook 44. A certificate of conformance, Number 92-196, was issued under the National Type Evaluation Program (NTEP) of the National Conference of Weights and Measures. The certificate is for capacities of 14.5-145 lb/ft. at belt speeds of 100-800 ft/min. with weighbridge lengths of 9-20 feet.
Adjustable suspension bushings, adjustable idler arms, and roller alignment trimming screws permit quick, accurate weigh platform alignment without the need for shims or special tools.
If your accuracy requirements increase in the future, simply add another weighing unit in series with the existing unit (four maximum) to increase your weighing accuracy.
35, 100, 200 up to 2600 TPH(2359 metric)
350, 1000 435 - 11,000 TPH(395 - 9979 metric)
ACCURACY:
Based on a totalised weight over a 35 - 100% design capacity and material test calibration, installed as per guidelines and instructions
| ± 0.5% |
- |
single weigh module with a commercial idler set |
| ± 0.25% |
- |
single weigh module with a Merrick precision, adjustable idler set |
| ± 0.125% |
- |
two weigh modules with Merrick precision, adjustable idler sets |
| ± 0.125% |
- |
three weigh modules with Merrick precision, adjustable idler sets (for certifiable or NTEP installations) |
| up to 0.1% |
- |
four weigh modules with Merrick precision, adjustable idler sets (for certifiable or NTEP installations) |
CALIBRATION:
Electronic, material test, test chains (optional), or test weight (optional).
OVERLOAD PROTECTION:
Infinite (mechanical stop). Models with 35, 100 and 200 kg load cells have shock overload protection.
LOAD CELL:
Factory calibrated, precision shear beam strain gauge type, temperature compensated +14 to 122° F (-10 to +50° C), and environmentally sealed.
LOAD CELL CONNECTION BOX:
Connects up to (4) weigh modules. Includes speed sensor pulse cut-off switch for measuring belt length. 304 stainless steel enclosure, NEMA 4
SPEED SENSOR:
Digital, photo-electric pulse generator for direct coupling to tail pulley or optional type CF wheel assembly carriage mounted between belt strands. 304 stainless steel enclosure, NEMA 4
WEIGH MODULE CONSTRUCTION:
Carbon steel with rust resistant primer, painted orange enamel. All adjustment screws and bushings anodized for corrosion resistance.
WEIGH MODULE MOUNTING BEAMS:
Structured channel, carbon steel construction, pre-drilled for mounting weigh module to conveyor stringers. Two supplied per weigh module with all mounting hardware. Painted with rust resistant primer and orange enamel.
