Engineered in-house at James Fisher Testing Services (JFTS), the SLFI improves safety, by providing railway asset managers with the information they need to assess manually operated signal levers.
Excessive signal lever pull force often indicates that maintenance is required. The SLFI provides routine measurements that can be used as part of an ongoing maintenance regime to trigger targeted lubrication or component replacement.
Furthermore, high pull forces are a cause of back injury to signal operatives and, by identifying these situations early, the SLFI supports pre-defined safe operating levels.
These real-time force measurements can be used to develop energy efficient practices and form part of a training programme that demonstrates how force can vary according to the technique.
Features and benefits of SLFI:
• Instantly measure pull force
• Pre‐set warning lights for excessive load
• Adaptable for different lever types
• Use as part of an ongoing maintenance regime
• Reduce likelihood of personal injury
• Fully-calibrated across the working range
• Easy to handle and transport
• Battery powered and rugged design, supplied with heavy duty transport case
The SLFI is specially designed to measure the pull and push weight required to operate signal levers for points, FPL or signals. It displays peak load and indicates where pre-set limits have been exceeded.
The SLFI load frame attaches to the signal lever handle at the normal pull height, using a clamp on adapter, to ensure it is set at optimum height.
The SLFI pull handle connects to the load frame fitted with a full bridge strain gauge, featuring a digital display.
All SLFI units are calibrated prior to shipment on JFTS’s purpose-built test rig, designed to simulate actual loading conditions.
All load measurements are calibrated against weights certified using UKAS calibrated reference scales.
JFTS recommends that SLFI equipment is re-calibrated annually.
• Rugged design
|Screen||LCD display with LED backlight, digit size 20mm|
|Keypad||Six-key silicon keypad|
|Indicators||Pre-set 80Kg and 100Kg load indicator LEDs|
|Display||Load / peak load hold|
|Power||DC 4.8‐24 VDC|
|Battery||12V 2.5Ah NiMH|
|Charging||Six hours (approx.)|
|IP rating||IP65 nominally but is recommended for in-door use only|
|Operating temperature||‐5°C to +50°C|
|Dimensions||H400mm x W90mm x D240mm|
|Calibration frequency||12 months|
Alternative language options:
SLFI - Signal Lever Force Indicator - Spanish
SLFI - Indicador de fuerza de palancas de señalización
SLFI - Signal Lever Force Indicator - French
SLFI - Indicateur de force sur levier de signalisation
SLFI - Signal Lever Force Indicator - Italian
SLFI - L’indicatore di forza per leve di manovra