Mass Measurement


Load cell indicator

October 2013 Mass Measurement

Loadtech’s LT1240 panel mount load cell indicator is a precision digital indicator for load cell and strain gauge applications. The high bright 6-digit 14 segment LED displays make for easy setup and readability and a simple menu system with built in help hints allows for easy configuration of display and load cell settings. The load cell calibration can be done directly from the load cell calibration certificate or from using known weights.

A universal mains switch mode power supply (85-264 VAC) is provided as standard but an optional low voltage (10–30 VDC) isolated power supply or a high voltage (25–70 VDC) isolated power supply can be installed.

The LT1240 contains precision front end circuitry for high accuracy and stability. The load cell bridge excitation voltage can be field selectable for 5 or 10VDC and provides for a Kelvin sensed feedback to compensate for cable loss. The LT1240 can power up to 4x350 Ω load cells at 10 V excitation and can interface to both 4 and 6-wire devices.

RS232 communications is supplied as standard with the Modbus RTU and Modbus ASCII protocol. A simple ASCII out protocol is also provided for serial printing and communicating to large displays. A second communication RS485 interface can be added in conjunction with the standard RS232 interface.

The LT1240 also includes advanced features such as auto-zero tracking, user input linearisation, max/min recording, programmable front push-buttons, programmable digital inputs, security menu lockout, motion indication, advanced digital filtering, plus many more to provide an all in one precision load cell indicator.


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