ET341 · Measuring Non-Electrical Quantities: T/P/F

Experimental Platform for Measuring Non-Electrical Quantities: Temperature, Pressure, Force

A course package on sensors and signal conditioning for non-electrical quantities - temperature, pressure, force and torque - measured with four experiment cards, configurable bridge circuits and a universal instrumentation amplifier.

Experiments

Calibration of the instrumentation amplifier
Circuits for temperature measurement - sources of error and linearization of the Wheatstone bridge
Principles and characteristic curves of Pt100, NTC, KTY and thermocouple sensors
Piezoelectric, inductive and resistive pressure measurement principles
Recording the characteristics of absolute and differential pressure sensors
Force measurement with strain gauges on a bending bar
Torque measurement with strain gauges on a torsion rod
Effect of the measuring circuit - full, half and quarter bridge configurations
Static characteristics and measurement errors: sensitivity, linearity, hysteresis, repeatability

Description

The platform teaches how non-electrical quantities - temperature, pressure, force and torque - are converted into electrical signals, conditioned and measured. Four experiment cards cover the complete chain. A force/torque card carries strain gauges applied to a bending bar and a torsion rod, wired in configurable bridge circuits and loaded with a calibrated weight set. A temperature card combines a thermally controlled heating element with four different sensor types - Pt100, NTC, KTY and thermocouple - so their characteristics can be recorded and compared on identical conditions. A pressure card provides absolute and differential pressure sensors with measuring bridges, complemented by an external pressure sensor with its own display. A universal measurement amplifier card with adjustable gain and offset, plus integrated constant-current and constant-voltage sources, conditions the sensor signals for acquisition.

Courseware

The interactive multimedia course - at least 7 hours of directed instruction - moves from amplifier calibration through bridge linearization to the systematic recording of sensor characteristics, with automatic calculation of sensitivity, linearity and measurement error, self-assessed exercises, and Romanian-language support. All signals are acquired and plotted by the ET300 base system's virtual instruments, with accessible measuring points at the input and output of every conditioning block.

Scope of Delivery

Force / torque experiment card (strain gauges on bending bar and torsion rod)
Temperature experiment card (controlled heater with 4 sensor types)
Pressure experiment card (absolute and differential sensors)
Universal measurement amplifier card
External pressure sensor with display
Weight set (2 g…200 g)
Storage case, connection cables and mechanical accessories, course software with browser

Specifications

Experiment cards 4 - force/torque, temperature, pressure, universal amplifier

Force / torque strain gauges on bending bar and torsion rod, bridge measuring circuits

Bridge configurations full / half / quarter bridge, with linearization

Temperature sensors 4 types - Pt100, NTC, KTY, thermocouple - on a thermally controlled heater

Pressure sensors absolute + differential, with bridges; external sensor with display; piezoelectric / inductive / resistive principles

Amplifier adjustable gain up to 8000 and offset; integrated constant-current and constant-voltage sources

Weight set 2 g…200 g for the force experiments

Course duration min. 7 hours of guided instruction, with self-assessment

Base system requires ET300 (interface + experimenter) - not included