Novatech F319 Handbrake Loadcell

Low profile with finger grip
Precise measurement with uneven load distribution
Good extraneous load rejection
Force measurement unaffected by handbrake lever angle
Connector for easy cable replacement

F319 Loadcell mounted on handbrake lever

F319 Handbrake Loadcell

The F319 handbrake loadcell offers an excellent technical solution to measurement of an ergonomic 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.

Details of our other loadcell families can be found in the Loadcell Specifier Guide.

**Ordering Codes**
See the loadcell ordering code sheet for more details. Add range in the required force units.
F319CFR0HN	Compression, IP65, rationalised

**F319 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

The standard range is manufactured in aluminium.

Application Tests

Uneven 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.

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.

**Additional Information**
Outline	Outline drawing of the product.
PDF data-sheet	Printable data-sheet. Right click on the link to download the file.

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