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Preparatory Sciences - mod. ELECTRIC AND ELECTRONICS MEASURES
FRANCESCO PIVA

Seat Medicina e Chirurgia
A.A. 2013-2014
Credits 3
Hours 30
Period 1^ semestre
Language ENG
U-gov code MT05-11-11 MT247

Prerequisites

General knowledge about Physics and Chemistry

Development of the course
The course aims to contribute to the formation of a laboratory technician who knows the working principles of scientific equipments of a laboratory, the methods of measurement of physical quantities, the transduction into electrical signals and the conversion into digital formats.

Learning outcomes

 At the end of the course the student should:
1. Knowing how to express the result of a measure and understand the errors which could  affect it
2. Understand the operating principles and main automated methods of measurement implemented in the most common equipment of a biomedical laboratory

Program

General principles on the measurement: units and measurement standards, measurement methods, expression of results, errors in measurement, the concept of uncertainty, significant digits; direct and indirect measures.

Electrical signals: the concept of voltage, intensity of electrical current, electrical resistance, measurement of voltage and current. Brief introduction to electric shock protection systems in the workplace: the magnetothermic and differential switches.

Analog to digital conversion and vice versa. Concepts of quantization, sampling and loss of
information.
The transducers: sensitivity, resolution, linearity, saturation, bandwidth, offset, slew rate.
Temperature sensors: thermometers, thermocouples, thermistors. How to measure high temperatures: pyrometers.

Force and pressure sensors. Doppler effect in flow sensors. Light intensity Sensor: photoresistors, photodiodes and photomultipliers.
Detectors of ionizing radiation: ionization chamber, proportional counter and Geiger-Muller, scintillators and photomultipliers.
Outline of Peltier devices and their use in PCR devices.
Spectrophotometry: basic law, lamps, monochromators, detectors. Turbidimetry. Spectrofluorimetry. Flow cytometry and cell sorting.

 

Note:
The following devices will be shown to students in the classroom: temperature sensors, sensors of light intensity (photodiodes and a photomultiplier), diffraction grating monochromator. Moreover, students will have the possibility of using a Peltier cell, a Geiger-Muller counter for alpha particles and one counter for beta and gamma radiations, a Geiger-Muller tube for measurement of radiation emitted from liquids.

Development of the examination
Oral examination

Recommended reading

a)      TITLE: Analisi chimica. Moderni metodi strumentali

b)      AUTHOR: Cozzi-Protti-Ruaro

c)       PUBLISHER: Zanichelli

Courses

• Tecniche di Laboratorio Biomedico