Direct reading mV/V load cell indicator
A
Vishay Nobel product story
Edited by the Engineeringtalk editorial team
Jan 5, 2001
The FTS3 indicator from Nobel Systems is aimed at load cell force transfer standards and force measurement to European standards for calibration verification
The FTS3 indicator from Nobel Systems is the ultimate in digital signal conditioning instrumentation for load cell force transfer standards and force measurement to European standards for calibration verification.
The indicator may be used as part of a force transfer standard system, permanently connected to the load cell with which it is calibrated or as an individually calibrated mV/V or mV/V indicator with any load cell with independent mV/V calibration.
It replaces the conventional high accuracy voltmeter, power supply and switch box combination.
With a display resolution of up to 700,000 divisions, it is a self-contained direct mV/V or mV/V unit that provides load cell excitation and signal conditioning in one convenient portable unit.
Microprocessor-based, this digital instrument offers the highest level of accuracy and versatility with full computer communications capabilities, utilising the two standard communications ports RS232 and RS485.
MODBUS RTU protocol allows the unit to communicate with most PCs and PLC's on the market.
A PC-based DELTACOM software package is available to set-up and test the communications.
To ensure system integrity, the indicator has numerous self-checking facilities as well as manual checks.
An error message is displayed if any fault is detected.
For maximum stability, the mV signal is converted directly into a digital signal using a unique V/F converter.
This technique avoids any of the temperature drift and instability problems associated with even the best A/D converters.
The transducer signal is referenced to the returning sense voltage to provide the input to the microprocessor that is independent of any variation of the excitation voltage.
This six-wire voltage sensing system can be used in long cable systems to ensure compensation is provided for all the voltage losses in the cable by measuring the actual excitation voltage at the load cell.
Resolution is better than 0.1mV (0.01mV/V) up to a value of 7mV/V.
A number of enclosure options are available to cater for most applications and a custom packaging service is available for those that do not.
Available as standard in a table top case version, options include a rugged flight case version, remote hold button, printer and custom-made load cell cable assemblies.
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Contact Vishay Nobel
Tel +44 1274 782229
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