설명
ALF257 Cylindrical Force Sensor
Key features
- Full load range: 80kN, 120kN, 160kN, 240kN
- Non-lin./hysteresis: 0.1/0.1% RL
- High accuracy
- Misalignment error compensation
- Highly adaptable inert end fixings
- Output rationalized to 2mV/V
About the ALF257 Cylindrical Force Sensor
The loadcell’s unique strain system compensates for typical force misalignment in force measurement rigs and industrial weighing systems. Its various end fixing options are all inert and easily modified for direct inclusion in mechanical assemblies.
The basic versions of the ALF257 are all sealed to IP65. If better sealing is required IP67 is available as an option. An SY014 integral 4 to 20mA output amplifier can be fitted as an option.
We are happy to design variants of this loadcell to meet your specific requirements.
Versions can be manufactured for operation up to +250°C. Please consult our engineering department.
Geometry: Beam and diaphragm combination. Tension, compression and bi-directional options are available. All standard bi-directional loadcells are calibrated in both modes.
All standard ranges are manufactured in stainless steel.
Notes
1. AL = Applied load. 3. Temperature coefficients apply over the compensated range.
2. RL = Rated load.
Connections
The loadcell is fitted with 2 metres of PVC insulated 4 core screened cable type 16-2-4C.
Excitation + = Red Signal + = Yellow Screen = Orange
Excitation – = Blue Signal – = Green
Reverse the signal connections to obtain a positive signal in tension mode. The screen is not connected to the loadcell body.
Technical Specifications
| Specification | Value |
|---|---|
| Bridge resistance | 700 Ω |
| Creep – 20 minutes | ±0.05% AL |
| Excitation voltage – maximum | 20V |
| Excitation voltage – recommended | 10V |
| Hysteresis | ±0.1% RL |
| Inclined load error – concentric at 3° | ±0.25% RL |
| Insulation resistance – minimum at 50vdc | 500MΩ |
| Load direction | Tension, compression, bi-directional |
| Measurement range | 80kN, 120kN, 160kN, 240kN |
| Non-linearity – terminal | ±0.1% RL |
| Overload – safe | 50% RL |
| Overload – ultimate | 100% RL |
| Rated output – rationalised (applies to single direction calibrations) | 2.0mV/V |
| Rationalisation tolerance | ±0.1% RL |
| Repeatability | ±0.02% RL |
| Sealing – r option | IP65 |
| Sealing – s option | IP67 |
| Temperature effect on rated output per °c | ±0.002% AL |
| Temperature effect on zero load output per °c | ±0.005% RL |
| Temperature range – compensated | -10 to +50°C |
| Temperature range – safe | -10 to +80°C |
| Weight – nominal (excluding cable) | 5.5 to 6.5kg |
| Zero load output | ±4% RL |
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