The Electrical measurement lab (MMS104) is based on a group of experimental cards that features different types of sensors and controllable drives to help teach the concept of electrical measurements and their parameters through a wide range of applications. The system demonstrates the principles of operation on which most electrical measurement devices (sensors) are based on. The training system will guide students in learning the theory and practical aspects of basic electrical measurements such as measuring current, voltage, force, torque, speed, temperature, pressure, displacement, etc., as well as the use of various instruments.
- The training system is a comprehensive solution to teach electrical measurements & instrumentations via a wide range of experimental cards supplied with one or more card holder.
- Experimental cards can be connected to the main unit (MMS100) or the power supply unit (MMS101). As well as any other external powering and measuring devices in the laboratory.
- The system supports cascaded connection for the card holders by connecting up to three card holders in series. In other words, the output of one card holder is fed as input to the next one.
- Electronic circuits contained in each card are presented by their schematic diagrams and test points to learn about the circuit wiring and components and connect between terminals using safety cables.
- The lab introduces the student to different types of industrial sensors, and how to connect them to measure different electrical measurement parameters.
- The experimental cards include : Electrical Values Package (EC-001.6.1), Physical Quantities Package 1(EC-001.6.2), Physical Quantities Package 2 (EC-001.6.3), Electronics Elements Measurements Package (EC-001.6.4) .
- The lab introduces the student to different types of industrial sensors, and how to connect them to measure different electrical measurement parameters.
- Objectives:
- Introducing the student to voltage and current measurements in both forms AC and DC.
- Familiarize the students with the term power factor and understand how to measure it.
- Learning about frequency measurement basics and constructing a frequency measurement circuit.
- Experimenting the instrumentation amplifier and adjusting offset and gain using the operational amplifier’s circuit.
- Learning calibration of variable voltage and variable current sources.
- Understanding characteristics and the principle of operation for 6 different types of sensors: NTC, PTC, KTY, PT100, LM35, and Thermocouple.
- Identifying the difference between absolute pressure sensors and gauge pressure sensor.
- Learning how to apply pressure and determine the output characteristics for pressure sensors.
- Implementing different circuits that are suitable for each sensor to observe their practical behavior.
- Experimenting how can the strain gauges be used to measure applied forces and torque measurement using the suitable transducer circuit.
- Investigation of the effect of the measuring circuit (full bridge, half bridge, quarter bridge).
- Introduction to the hall effect sensor’s characteristics and working principle of operation.
- Understanding the resolver’s principle of operation in calculating angle and position
- Introduction to the design of inductive displacement measurement sensor
- Constructing a picofarad capacitance measurement circuit using an inverting amplifier and a voltage follower.
- Understanding the difference between deflection type instruments and Null/Zero type instruments.
- Learning about the construction of Wheatstone bridge, Wien’s bridge and Maxwell-Wien’s bridge in addition to analyzing each bridge theoretically.
- Implementing a practical Automatic Balancing bridge for measuring inductance, capacitance and resistance.
- Voltage & Current Measurements Card Understanding the functional principles of measuring instruments.
- Explain the difference between deflection and bridge methods
- Conversion of a Galvanometer into an Ammeter or Avometer
- measuring different ranges of DC current using resistive networks and a galvanometer.
- Demonstrating how can this setup be modified for measuring AC current by adding a rectifier.
- Constructing circuits for measuring different ranges of DC and AC Voltage
- Frequency Meter Card
- Learning about frequency measurement basics and constructing a frequency measurement circuit.
- Understanding the principle of operation of the digital frequency meter.
- Learning how to set digital frequency meter parameters to get the best accuracy.
- Knowing the possible errors in the frequency measurement process and calculating the error percentage.
- Displaying the frequency via 2-digit 7- segments.
- Using of Multi ranges selector to set the maximum frequency
- Power Factor Measurements Card
- Implementing a power factor measurement circuit & understanding it’s principle of operation.
- Comparing between voltage and current phase shift.
- Experiencing the effect of passive elements (R, L and C) on the phase shift and the power factor.
- Measuring effective, apparent and reactive power.
- Force & Torque Measurements Card Introduction to the function and characteristics of strain gauges
- Experimenting how can the strain gauges be used to measure applied forces on a bending bar
- Experiencing the effect of using strain gauges in a bridge configuration for improving accuracy.
- Implementing circuits featuring strain gauges for torque measurement of Torsion rod.
- Understanding how does the installation of multiple strain gauges on a Torsion rod in a45 degrees configuration helps to cancel forces in undesired directions.
- Recording characteristics for strain gauges on a bending bar and torsion rod
- Measuring forces on a bending bar and torsion rod
- Investigation of the effect of the measuring circuit (full bridge, half bridge, quarter bridge)
- Temperature Measurements Card
- Learning how to use a Temperature-controlled heater for setting the temperature to be measured.
- Introduction to the characteristics and the principle of operation for 6 different types of sensors: NTC, PTC , KTY , PT100 , LM35 and Thermocouple sensor.
- Implementing different circuits that are suitable for each sensor to observe their practical behavior during temperature measurement.
- Learning about the functionality of thermocouple amplifiers, cold Junction compensator & using them with the thermocouple sensor for temperature measurement.
- Determining the different sources of errors in temperature measurements.
- Pressure Measurements Card
- Identifying the difference between absolute pressure sensors and gauge pressure sensors.
- Constructing setups using pneumatic pipes and pressure source to apply pressure on the sensors.
- determining the output characteristics for each pressure sensor.
- Recording characteristics for absolute, gauge, and differential pressure sensors.
- Comparing the measured pressure by the sensors to a reference external device in order to calculate the corresponding error.
- Experimenting the Differential pressure sensors and how are they used to measure the pressure difference between 2 channels.
- Interfacing the output voltages from the pressure sensors to the amplifiers on the universal amplifier card in order to increase the full-scale output.
- Universal Amplifier Card
- Universal Amplifier Card
- use the current source circuit that’s capable of supplying up to 50 mA.
- Using the on-card adjustable voltage source.
- Implementing circuits including an inverting amplifier with adjustable gain and offset voltage.
- Interfacing the different blocks of the universal amplifier card with the other measurement cards for amplifying the measured signals.
- Position and Speed Measurements card
- Introduction to the hall effect sensor’s characteristics and working principle of operation.
- Determining the position (Clockwise/Anti-clockwise) and speed (rpm) of a DC motor practically using the Hall effect and optical sensors.
- Examining the difference practically between the analog and the digital techniques for measuring the speed using hall effect sensor.
- Inductive Displacement sensor card
- Introduction to the design of inductive displacement measurement sensor (Linear Variable Differential Transformer).
- Determine the I/O characteristics of LVDT.
- Determining the linear range of operation of LVDT.
- Capacitive Displacement sensor card
- Understanding the parameters affecting the capacitance value of a variable plate capacitor.
- Constructing a picofarad capacitance measurement circuit using an inverting
- amplifier and a voltage follower for measuring the capacitance of the variable plate capacitor that corresponds to the measured displacement.
- Resolver Measurement
- Introducing the structure of the resolver and the principles of operation of it’s primary and secondary coils.
- Constructing circuits for the generation and amplification of the resolver’s excitation signal.
- Understanding how does the feedback signal from the secondary coils can be used to calculate the resolver’s model angle and position.
- Using the signal conditioning circuits learn how to convert the secondary coil signals to a suitable range for the practical ADCs
- Bridges measurement card
- Learning about the construction of Wheatstone bridge, Wien’s bridge, and Maxwell-Wien’s bridge.
- understand the Whetstone, Wien, and Maxwell-Wien bridges parameters & calculations in addition to how are they used for measurement.
- Practically achieving the balance condition of each bridge in order to verify the theoretical equations.
- measure unknown resistance, capacitance and inductance using the suitable bridge.
- learning How to analyze bridge equations theoretically through the basic electric circuits rules.
- LCR Measurements Card
- Constructing a practical automatic balancing bridge for measuring inductance, capacitance and resistance.
- Extracting the design equations of the automatic balancing bridge for the calculation of the impedance.
- Understanding how the circuit change when selecting different Measurement ranges or measurement type
- Learning the criteria for selecting the
- Card Objectives:
- Identifying the difference between absolute pressure sensors and gauge pressure sensor.
- Constructing setups using pneumatic
- pipes, one of five different pressure sensors in addition to an air syringe for applying pressure and determining the output characteristics for each sensor.
- Comparing the measured pressure by the sensors to a reference external device in order to calculate the corresponding error.
- Experimenting two Differential pressure sensors and how ‘re they used to measure the pressure difference between 2 channels.
- Interfacing the output voltages from the pressure sensors to the amplifiers on the universal amplifier card in order to increase the full-scale output.
- Card Objectives:
- Introduction to the hall effect sensor’s characteristics and working principle of operation.
- Determining the position (Clockwise/Anti-clockwise) and speed (rpm) of a DC motor practically using Hall effect and optical sensors.
- Examining the difference practically between the analog and the digital techniques for measuring the speed using hall effect sensor.
- Card Objectives:
- Introduction to the design of inductive displacement measurement sensor (Linear Variable differential Transformer).
- Conducting experiments to determine the I/O characteristics of LVDT.
- Determining the linear range of operation of LVDT.
- Card Objectives:
- Understanding the parameters affecting the capacitance value of a variable plate capacitor.
- Constructing a picofarad capacitance measurement circuit using an inverting amplifier and a voltage follower for measuring the capacitance of the variable plate capacitor that corresponds to the measured displacement.
- Card Objectives:
- Introducing the structure of the resolver and the principles of operation of it’s primary and secondary coils.
- Constructing circuits for the generation and the amplification of the resolver’s excitation signal.
- Understanding how does the feedback signal from the secondary coils can be used to calculate the resolver’s model angle and position.
- Using the signal conditioning circuits learn how to convert the secondary coil signals to suitable range for the practical ADCs
- Card Objectives:
- Understanding the difference between deflection type instruments and Null/Zero type instruments.
- Learning about the construction of Wheatstone bridge, Wien’s bridge and Maxwell-Wien’s bridge in addition to analyzing each bridge theoretically through the basic electric circuit’s rules.
- Understanding each bridge’s parametric equations and how to use them to measure resistance.
- Practically achieving the Balance condition of each bridge in order to verify the theoretical equations and to measure unknown resistance, capacitance and inductance.
- Card Objectives:
- Constructing a practical Automatic Balancing bridge for measuring inductance, capacitance and resistance.
- Extracting the design equations of the Automatic balancing bridge for the calculation of the impedance.
- Understanding how does the circuit change when selecting different measurement range or measurement type in addition to the criterial for selecting appropriate measurement range.
- Using the circuit to measure various unknown passive elements (Resistors, Inductors and capacitors).
Lot 36, 4th Industrial Zone, 6th October City, Giza, Egypt
+2(02)38335766
+2(02)38847045
