RFS On-Line Tension Sensor
10 Ranges up 500Kg
Resolution of 0.1% and better
The Model RFS Tension Sensors measure the running line tensions of yarn, wires, optic fibers, cables, tapes/bands, wraps/webs, foils and similar process materials.
RFS stands for enduring online precision. The specified and calibrated accuracy remains unchanged throughout the unit’s service life and, across wide ranges, is independent of the force introduction point, i.e. the sensor is not affected by lever arm action
- any axial tilt torques which might appear
- direct axial forces
The functional principle makes for superb sensitivity while at the same time offering enormous performance capabilities. The force acting radially at the bearing journal, along the measurement vector, causes a microscopically small, elastic deformation of the complex load cell. The deformation is registered at an exactly pre-determined position by way of strain gauges and is then evaluated precise electronically.
The high mechanical stiffness of the load cell enables measurement with virtually no excursion.
This tension measurement principle is based on the evaluation of the force applied radially and transferred to the sensor by way of the bearing journal. This force is determined by the reversing geometry and the line tension.
Features
- Extremely robust by overload protection up to 800%
- Existing reversing points can be adapted as measurement points
- Independent of the force introduction point, i.e. the sensor is not affected by lever arm action
- No influence of any axial tilt torques or direct axial forces which might appear
- Centrifugal force will take no affect with optimal alignment in rotating purposes
- Stainless steel housing
- Thought-through concept of housing for simple mounting
- Also suitable to design measuring rollers for acquisition of very low web tensions
Specifications
| Accuracy | ±1 % full scale and ±1 digit
other calibration material: ±3 % full scale or better |
| Overload protection | 100 % of tension range |
| Measuring principle | Strain gauge bridge |
| Measuring roller deflection | Max. 0.5 mm |
| Natural frequency | Approx. 500 Hz, depending on tension range |
| Signal processing | Analog (option: digital) |
| Temperature drift | Less than ±0.05 % full scale/°C |
| Output Signal | Standard: 0 - 1 V DC (analog) impedance: ≥ 5 kΩ
Option: 0 - 10 V DC (analog), 4 - 20 mA (current) or mV/V (DMS) digital RS 232 |
| Damping (fg) | Standard: 30 Hz (other values on request) |
| Temperature range | 10 - 45 °C |
| Air humidity | 85 % RH, max. |
| Power supply | +15...24 V DC, max. 50 mA regulated
Code A10: max. +5 V DC, max. 20 mA regulated |
| Housing material | Aluminium |
| Weight, net (gross) | Approx. 1500 g (approx. 1800 g) |
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