October 2002Maintenance, Test & Measurement, Calibration
Instrotech's range of Revere stainless steel compression and beam load cells are now available with digital output. The RS485 I RS422 bus allows the scada or DCS to communicate directly with each load cell in the system, thus offering advantages in system set-up, control, corner correction, fault finding and load cell replacement.
Within the smart load cell is a multilayer printed circuit board with a power regulator, which supplies an excitation voltage to the Wheatstone bridge. The uncompensated output of the bridge is fed through an A/D converter and digital filter. A microprocessor controls the A/D converter, a temperature sensor and the digital output interface.
The cells offer an extensive diagnostics structure, which verifies the integrity and operation of the strain gauge circuit, power supply, EEprom, A/D converter and temperature sensor. Smart load cells produce a strong output signal, which is unaffected by electrical noise and temperature fluctuations on field cabling, thereby enabling the use of cable lengths up to 1200 m. A surge protection device is integrated to protect against overvoltages and lightning strikes.
These hermetically sealed IP 66/68 units are of stainless steel construction and are for accuracy classes C3 and C4. Digital output is via RS485 or RS422 interface and can be processed by a computer, PLC or a dedicated indicator. Multiple systems with up to 32 load cells may be connected to one control unit. Software drivers are available for the user to develop their own system software.
A rationalised output of 240 000 counts means that within a system, any load cell can be replaced without the need for recalibration. Low and medium accuracy systems can be automatically calibrated without the need for dead weights. Capacities for the beam load cell are 0,5 to 10 ton and 10 to 100 ton for the compression type.
The marginal extra cost of these load cells as opposed to standard units is offset by not requiring a load cell amplifier.
Noncontact infrared temperature control in aluminium rolling process Instrotech
Temperature Measurement
The aluminium rolling process is critical to the aluminium manufacturing industry, where precise temperature measurement is essential for ensuring high-quality product output and protecting equipment. The Optris long-wavelength camera can accurately measure strip temperatures in cold rolling and coiling applications.
Read more...Rotary atomisers for efficient paint spraying Instrotech
Sensors & Transducers
Painting the bodywork is an integral component of vehicle manufacturing. Keller supplied intrinsically safe pressure transmitters and intrinsically safe temperature sensors to a client producing paint robots for the car industry.
Read more...Automated test and measurement Comtest
Maintenance, Test & Measurement, Calibration
Comtest, in partnership with global brands, provides customised solutions with integrated hardware and software for efficient testing and data collection.
Read more...Quality process control instrumentation Instrotech
Temperature Measurement
Instrotech is a leading provider of high-quality process control instrumentation and industrial automation solutions that are designed to optimise efficiency, reliability and safety across industries.
Read more...Advanced field calibrator and communicator
Maintenance, Test & Measurement, Calibration
The Beamex MC6 is a high-accuracy field calibrator that offers automatic calibration capabilities for pressure, temperature and various electrical signals.
Read more...Inline particle measurement Mecosa
Maintenance, Test & Measurement, Calibration
Part of the SOPAT family, Parsum has for more than 20 years stood for the measurement of particles in a running process - without sampling and without a laboratory.
Read more...Inline analysis measurement technology Mecosa
Maintenance, Test & Measurement, Calibration
SOPAT develops and sells a photo-optical and image-based inline analysis measurement technology that quantitatively characterises particulate multi-phase systems. The software provides real-time analysis of particle size distribution.
Read more...UV water treatment system
Maintenance, Test & Measurement, Calibration
bestUV is an innovative manufacturer of professional ultraviolet (UV) water treatment systems for industrial markets.
Read more...RS PRO a key partner for planned maintenance RS South Africa
Maintenance, Test & Measurement, Calibration
RS PRO, the own-brand of RS, offers a comprehensive selection of over 80 000 products spanning all industries and technologies.
Read more...WearCheck leads the way in condition monitoring Wearcheck
Maintenance, Test & Measurement, Calibration
Minimising maintenance costs of mining and power-generating machinery and maximising its operational efficiency – these goals form the foundation of the proactive/preventive maintenance services provided by the expert technicians at condition monitoring specialist, WearCheck.
printer friendly version