# Lab1

Topics: Voltage, Root mean square, Alternating current Pages: 35 (5818 words) Published: January 11, 2014
Training objectives

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Training objectives
Welcome to the UniTrain-I course Instrumentation Technology 1: Measuring electrical variables. The LUCAS-NÜLLE team wishes you plenty of fun and success working through the course topics and performing the experiments. The pages that follow provide you with a summary of the course contents and the required equipment.

The course provides a general summary of measuring techniques both classic and modern that are used to measure electrical quantities. This includes explanations of all the relevant theory and measuring principles and is demonstrated in illuminating and well-tested experiments.

Training contents
Understanding how galvanometers work
Distinguishing between deflection and bridge measuring methods The difference between analog and digital measurements
The difference between moving iron and moving coil galvanometers How electrodynamic galvanometers work
Altering the measuring range for measurements of current and voltage Principles for measuring power
Measurement of apparent, reactive and active power
Principles for measuring the power factor
Measuring power factors
Understanding how electrical work is measured
Measuring electrical work
Understanding how frequency is measured
Measuring frequency

Requirements
Required for the succesful completion of this course
Fundamentals of AC and DC technology
Fundamentals of digital technology

file://C:\Program Files\LN\L@BSOFT\BooksENU\1K01\ELMT\ELMT_00512.htm

10/15/2013

Equipment

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Equipment
SO4203- UniTrain-I
2A
Interface
SO4203- 2 x UniTrain-I
2B
Experimenters
UniTrain-I
SO4203- "Current and
5J
voltage
measurement"
UniTrain-I
SO4203- "Power, cos φ
5K
and frequency
measurement"
SO5146- UniTrain-I set of
1L
cables
SO5124- Connection
7B
plugs

Some animations require a Flash player to be installed. If the Flash player is not yet installed on your system, you may download the current version from Macromedia at any time.

file://C:\Program Files\LN\L@BSOFT\BooksENU\1K01\ELMT\ELMT_00513.htm

10/15/2013

Card SO4203-5J

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Card SO4203-5J
The card SO4203-5J "Current and Voltage Measurement" contains circuit components for the following: Measuring current and voltage with an analog measuring instrument Extending measuring ranges
Various resistive, capacitive and inductive loads
Warning:
The card and measuring equipment are only designed for use with safety extra-low voltage. For this reason you should only use the voltages provided by the UniTrain-I system. Never connect to external voltage sources other than those provided by the Unitrain-I system.

Roll the mouse over the image for information about the individual components on the card.

Technical data:
Galvanometer:
Moving coil galvanometer with magnetic core
Internal resistance 1180 Ω
Rated current for full deflection 400 A
Rated voltage for full deflection 0.472 V
Diode protective circuit and protective resistor
Instrument can withstand voltages of up to 24 V
Tolerance max. 10% of the highest value on the scale
Protective circuitry and range extension:
Auxiliary resistors are provided for extending the
measuring ranges and are protected from overcurrent
of up to 0.7 A by diodes.
Dimensions:
160 x 100 mm (width x height)

file://C:\Program Files\LN\L@BSOFT\BooksENU\1K01\ELMT\ELMT_00514.htm

10/15/2013

Card SO4203-5K

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Card SO4203-5K
The card SO4203-5K "Power, cos φ, and frequency measurement" contains three circuit panels for experiments on the principles for measuring the following variables: Reactive, apparent and effective power

Cos φ (power factor)
Frequency
Warning:
Card and measuring equipment are only designed for use with safety extra-low voltage. For this reason you should only use the voltages provided by the UniTrain-I system. Never connect to external voltage sources other than those provided by the Unitrain-I system....