Cardinal SWIM Weigh-In-Motion Axle Scales

The Cardinal SWIM Series of Slow Speed In-Motion Vehicle Scale offers the ideal combination of accuracy and speed. The SWIM In-Motion Scale uses a single weighbridge contained in a solid lower frame. Each platform is supported by four Cardinal SCA Series Stainless Steel Compression Load Cells to weigh each axle end of a vehicle as it travels across the scale. The weighing platform is approximately 12 feet in width and 30 inches in length and is constructed of smooth steel plate. This scale is not legal for trade. If you need that, please see our standard EPR truck scale.

The welded steel structure is designed with performance and longevity in mind. The extremely stiff and rigid weighbridge, coupled with four 50,000 pound capacity Cardinal strain gauge load cells, results in a higher resonant frequency allowing more efficient filtering of spurious weight signals. Weighbridge is mounted inside a single welded framework. This lower frame is 13’-9” by 3’-1” (4.2m X 1m) and is 15” (0.4m) deep. The weighbridge is a single 12 ft X 2.5 ft (3.7m X 0.8m) weighbridge. Removable maintenance panels at each end to access the load cells, checking, and clean pit.

The SWIM scale is effective at weighing vehicles without the need for the driver to stop. This saves time and congestion at the scale site. The SWIM scale will provide reliable axle and gross vehicle weights at speeds up to 15 mph (25km/h). * Note: As speeds go up, accuracy will go down. Provides Gross Vehicle Weights within 1% At speeds up to 6 mph (10km/h). SWIM scale will capture and provide individual axle weights. Specifications and product description subject to change due to manufacturer changes & updates. 

TYPICAL ACCURACY

Static
(Static) 0 km/h (0 mph)     Gross wt. ±0.1% of applied

Dynamic
0-5 km/h (0-3 mph)            Gross wt. ±0.5% of applied
5-10 km/h (3-6 mph)          Gross wt. ±1.0% of applied
10-20 km/h (6-12 mph)       Gross wt. ±1.5% of applied
20-24 km/h (12-15 mph)     Gross wt. ±2.0% of applied

STATIC WEIGHTS
Cardinal’s SWIM scale can also be used as a Static Scale to weigh single axles for an even more accurate measurement. * When used statically the SWIM meets NIST Class III tolerances. However, the unit is still not a NTEP legal for trade scale.

Just look at some of the standard features of this scale:

Includes four 50,000 pound capacity NTEP and OIML certified stainless steel compression SCA-50K load cells. These are the same load cells used in many of Cardinal’s legendary static vehicle scales.

Rigidly checked fully welded heavy capacity steel weighbridge.

Includes NTEP and OIML certified weight indicator.

Speeds up to 10 mph with 1 percent error rates.

Integral Load Cell stainless steel junction box.

Available accessories include axle sensors, vehicle classifier, traffic control, License Plate Readers, DOT Readers, and custom software.

Ideal for:
Freight Terminals
Commercial Fleet Axle
Weight/Gross weight checking before exiting facility
Mining/Rock Quarry Material
Ports (Solas Regulations)
Agricultural Applications
Sorting and Pre-screening

Advantages over a 70 foot truck scale
Less Cost
Less Space needed
Very Little Concrete or Rebar required compared to full length truck scale
Minimal concrete form work and installation labor

The Cardinal SWIM weigh-in-motion axle scales provides a low-cost alternative to traditional static weigh scales. The Cardinal SWIM is designed specifically for Weigh-in-Motion and provides axle weighing capabilities at a fraction of the cost of a traditional static scale. Maintenance costs are low and life cycle costs are very attractive. Works great with 825 Spectrum weight indicator, SB500 remote display, and P600 printer.

To achieve the highest accuracy, the following conditions should be met:

1. The vehicle needs to approach and exit the scale in a straight line. Turning the vehicle during the weighment should be avoided. I.e. A straight approach and exit of 75 feet should be dictated.

2. All effort should be made to avoid conditions which would cause the vehicle to rock, sway, bounce, or have the suspension excited in any way. This requires pavement to be in good condition in advance and beyond the scale.

3. The vehicle should remain on a consistent grade during approach and exit from the scale. This does not mean it has to be level, but all axles should remain on the same plane during the entire pass. The factory strongly recommends you avoid any change in the rising or falling of approaches for 75 feet on either side of the scale. This condition would shift the weight backward or forward onto axles unevenly during the pass.

Some limitations to keep in mind with the SWIM
1. Without the addition of option BL sensors there is no Speed reading
2. Because the is no speed reading there is no axle distances measured so no vehicle classification
3. This is a single platform so there is not out-of-balance (side to side) detection
4. The scale can not intrinsically differentiate between single and tandem axles. Although each axle is weighed independently.
5. The weight reading on the indicator will be cleared as soon as the next vehicle touches the scale. A paper ticket will be printed but if electronic records are to be kept for review they need to be exported or saved to a database.