Accuracy
Features
Tachometry Overview
- The purpose of the Tachometer is to measure belt travel
- The measurement is required to be very accurate, within 0.1% to 0.05%.
- Errors in tachometry translate directly to error in the belt weigher output.
- The tachometer pulley (or wheel) should be at least 300mm diameter to reduce tachometer error.
- CST use tachometers frequencies from 1Hz to 200Hz
- Higher frequency tachometers can be easier to calibrate in a short belt distance
- Designed and Built in Australia
CST Tachometer Products
BTS - Basic Tachometer System
- Economical but very reliable
- Tail or Bend Pulley Mount
- Easily Maintained by site personnel
- Uses customer preferred proximity Sensor 2 or 3 wire PNP/NPN
Trailing Arm Tachometer
- Convenient location near weigh frame
- Run-clean scraper assembly
- Easily Maintained by site personnel
- Uses customer preferred proximity Sensor 2 or 3 wire PNP/NPN
- Encoder type available
Damped Wheel Tachometer
- Counterbalanced for constant wheel loading
- Rotary Damper keeps wheel in contact
- Developed for difficult applications with high belt stretch
- Run-clean wheel design
- High frequency Encoder type for optimum performance
Precision Pre-calibrated Tachometer Variant
The Precision Pre-Calibrated tachometer features a wide, large diameter, low inertia wheel made from 316 stainless steel with adjustable spring tension designed to give optimum contact to the underside of the carry belt
PFS4 Belt Weigher Products
PFS4-2
- Fully suspended four load cell weigh frame design series
- Very robust weighframe typically 20-30+ year life
- 2, 3,4, 5 or 6 idler weigher
- Dimensions and idler spacing to suit site
- Large range of steel and load cell sizes to suit client site specidic requirements
- NMI, NTEP, OIML trade certified
- True accuracy range in real operation determined by application engineering
PFS4-4
- Fully suspended four load cell weigh frame design series
- Very robust weighframe typically 20-30+ year life
- 2, 3,4, 5 or 6 idler weigher
- Dimensions and idler spacing to suit site
- Large range of steel and load cell sizes to suit client site specidic requirements
- NMI, NTEP, OIML trade certified
- True accuracy range in real operation determined by application engineering
PFS4-4-CSRR
- Variant of PFS4 for special applications to achieve true high accuracy range in real operation
- Used when standard design by any manufacturer cannot reliably meet specified accuracy
- Capable of +/-0.1% accuracy in real operation
- Independantly verified
- Unique to CST
PFS4-4-NI
(Non Intrusive)
- Non-Intrusive version does not require the removal of cross bracing
- Fully suspended four load cell weigh frame design series
- Very robust weighframe typically 20-30+ year life
- 2, 3,4, 5 or 6 idler weigher
- Dimensions and idler spacing to suit site
- Large range of steel and load cell sizes to suit client site specidic requirements
- NMI, NTEP, OIML trade certified
- True accuracy range in real operation determined by application engineering
- Unique to CST
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