Noise Hardened Torquemeters Option G

1550 Kingston Rd. #1116
Pickering, ON
L1V 6W9
TEL: 1 800 809 7167 CDA/USA
Load Cells/Transducers
Magnetic Sensors
Pressure Sensors
Torquemeter/Torque Sensor
Ultrasonic Sensors
Vibration/Shock Monitors
Noise Hardened Torquemeters Option G  
For Use in severe electomagnetic interference (EMI)
For use in severe electromagnetic interference
(EMI) Improves noise immunity by a factor of 10
Available For All MCRT® mV/V Torquemeters
Available For All MCRT® DC Operated Torquemeters
Retains Original Torquemeter Features and Specifications

Most new variable frequency motor drives use ac flux vector control. High power insulated gate bipolar transistors (IGBT's) are rapidly switched under microprocessor control. Few commercial drives switch current at the axis crossing - they don't use soft switching. Rather, they use hard switching.

As a result, these drives generate severe EMI which can cause catastrophic errors in ordinary torquemeters. Even standard MCRT® torquemeters, which are world renowned for their tolerance of electrical noise and machinery fields, can see errors - usually less than 1% of rating, model dependent.

Option G incorporates new technology that improves noise immunity by a factor of ten or more, compared to that of the same model without Option G. the improvement virtually eliminates EMI as a measurement factor.

Option G is available for all catalog MCRT® mV/V and DC Operated Sensors. Of the two types, DC Operated Sensors provide the greatest noise immunity. They are less vulnerable to cable noise pickup than are mV/V sensors - their output signal is high and the output impedance is very low. Two-wire Torque Transmitters will be available with Option G in Early 1999.

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