Description
F319 Handbrake Loadcell
The double shear web design and rigid low profile finger grip combine to maintain the same precision of measurement along the entire finger grip length. The typical unevenly distributed force applied by the human hand is measured with good repeatability and minimum error in a sense normal to the lever axis.
The F319 has been fitted directly to a handbrake lever and also adapted for production tests by using an easy fit socket moulding, as care must be taken to ensure that the hand clamping forces are not measured in addition to the handbrake pull force the moulding used a ‘dorsal fin’ to ensure hand clamping was avoided.
Application TestsUneven Hand Loading Errors
The uneven load distribution of a human hand has been replicated by applying point loads over the length of the loadcell. In the worst case, the extreme ends, the error is limited to <1% of the applied force.
Handbrake Angle Vector Errors
The F319 handbrake loadcell measures force perpendicular or normal to the handbrake lever. Variations of lever inclination angle can produce angular deviations between the applied force and the loadcell’s normal measurement axis. For angular deviations up to 33° to the loadcell’s normal axis the load errors are limited to <1% of the applied force.
The double shear web design and rigid low profile finger grip combine to maintain the same precision of measurement along the entire finger grip length. The typical unevenly distributed force applied by the human hand is measured with good repeatability and minimum error in a sense normal to the lever axis.
The F319 has been fitted directly to a handbrake lever and also adapted for production tests by using an easy fit socket moulding, as care must be taken to ensure that the hand clamping forces are not measured in addition to the handbrake pull force the moulding used a ‘dorsal fin’ to ensure hand clamping was avoided.
Application TestsUneven Hand Loading Errors
The uneven load distribution of a human hand has been replicated by applying point loads over the length of the loadcell. In the worst case, the extreme ends, the error is limited to <1% of the applied force.
Handbrake Angle Vector Errors
The F319 handbrake loadcell measures force perpendicular or normal to the handbrake lever. Variations of lever inclination angle can produce angular deviations between the applied force and the loadcell’s normal measurement axis. For angular deviations up to 33° to the loadcell’s normal axis the load errors are limited to <1% of the applied force.
Specification
| Parameter | Value | Unit |
|---|---|---|
| Non-linearity – Terminal | ±0.05 | % RL |
| Hysteresis | ±0.05 | % RL |
| Creep – 20 minutes | ±0.1 | % AL |
| Repeatability | ±0.02 | % RL |
| Rated output – Rationalised | 1.0 | mV/V |
| Rationalisation tolerance | ±0.2 | % RL |
| Zero load output | ±4 | % RL |
| Temperature effect on rated output per °C | ±0.005 | % AL |
| Temperature effect on zero load output per °C | ±0.01 | % RL |
| Temperature range – Compensated | -10 to +50 | °C |
| Temperature range – Safe | -10 to +80 | °C |
| Excitation voltage – Recommended | 10 | V |
| Excitation voltage – Maximum | 10 | V |
| Bridge resistance | 350 | Ω |
| Insulation resistance – Minimum at 50Vdc | 500 | MΩ |
| Structural stiffness – Nominal | 1.4 x 107 | N/m |
| Overload – Safe | 50 | % RL |
| Overload – Ultimate | 100 | % RL |
| Sealing | IP65 |
Order Codes
| Code | Description |
|---|---|
| F319CFR0HN | Compression, IP65, rationalised |
Notes
- AL = Applied load.
- RL = Rated load.
- Temperature coefficients apply over the compensated range.
Connections
The F319 loadcell is fitted with 2 metres of PVC insulated 4 core screened cable type 7-1-4C. The cable is connected to the loadcell with a miniature 4 pin connector so that cable can be easily replaced if it is damaged.
Excitation + = Red, Excitation – = Blue, Signal + = Yellow, Signal – = Green, Screen = Orange.
The screen is not connected to the loadcell body.
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