Electronic Weighbridge
The structure of weighbridge is made up of a framework of girders adequately reinforced with transverse beams and suitable non-slip top deck. The entire steel framework is mounted on strain gauge double end shear beam / Rocker pin type load cells. The number of load cells depends on the length of the platform.
The shear stress produced by the load is detected by a strain gauge, full bridge circuit and converted into an analog electrical signal. The signal from each load cell is fed to Junction box. The output from Junction box is fed to microprocessor based weighbridge terminal LEO FSD − 501 . The processing electronics of terminal digitizes the signal from the Junction-box using an ADC, based on latest Sigma Delta Technology and weight is registered on LED display.
Construction an Works
- Universal switch mode power supply with input range (80 – 420) VAC, 50/60 hz.
- Battery backup with 6V/4.5 AH battery capable af supplying up to. 45 hour of backup.
- Loadcell supply: 5 VDC, short circuit proof for excitation of up to 10 load cells.
ADC
Sigma Delta Analog to digital converter and chopper stabilized programmable gain instrumentation amplifier
- Noise: 6nv/ vhz @ 0-1hz.
- linearity error: 0.0007%FS.
- Internal resolution: 24bit.
- Input range:0-30 mv
CALIBRATION
| Type | : 7 segment LED |
| Height | : 1 inch |
| Number of digital | : 6 digits |
| Colour | : Super bright red |
| Unit | : kg |
Features of Electronic Weighing Scale
- Temperature range: 10 °C ~ 55 °C
- Auto zero tracking
- Auto weighing memory
- Computer connectivity : Optoisolated RS 232 port interface # Power consumption : 7 VA (max)
- Remote display: Parallel port 15 pin D-connector provided at side of weighbridge terminal
- Optional Jumbo display ( 2 inch or 4 inch high digits )
- Housing: Sturdy gray colored ABS plastic cabinet
- Junction-box: ABS I.P. 65 Sealing
| P.L Size (Meters) | Capacity | Loadcells | Least Count |
|---|---|---|---|
| 4.2 X 2.4 | 5/10/15 ton | 4 | 2 kg |
| 6.6 X 3 | 30/40/50 ton | 4 | 5 kg |
| 7.5 X 3 | 40/50/60 ton | 4 | 5/10 kg |
| 9 X 3 | 40/50/60/80 ton | 4 | 5/10 kg |
| 10 X 3 | 40/50/60/80 ton | 4 | 5/10 kg |
| 12 X 3 | 40/60/80/100 ton | 6 | 5/10/20 kg |
| 15 X 3 | 40 – 100 ton | 6/8 | 5/10/20 kg |
| 16 X 3 | 40 – 100 ton | 6/8 | 5/10/20 kg |
| 18 X 3 | 40 – 100 ton | 8 | 10/20 kg |
| 20 X 3 | 40 – 200 ton | 8 | 10/20/50 kg |
| 22 X 3 | 40 – 200 ton | 8 | 10/20/50 kg |
| 24 X 3 | 40 – 200 ton | 8 | 10/20/50 kg |
| 27 X 3 | 40 – 200 ton | 8 | 10/20/50 kg |