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Purpose module & analysis:

This experiment is intended to give the student a quick exposure to the laboratory equipment

which will be used in this course:a) Dc power supply.b) Digital multi-meter " DMM" .c) Function generator

Procedure to follow in lab:

1) Dc power supply:Before performing the following procedure, make a neat sketch of the power-supply frontpanel;

- apply input power ;turn the current limit control to the maximum ; turn the coarse and fine

voltage controls to the maximum select the voltage meter

And record the value.- turn both the coarse and fine voltage control to the minimum;

select a current ; place a short circuit between the (+) (-) terminal ; turn the fine control slowly up

until maximum current indicated and record the value.- select voltage and record its reading.

-select the current meter; gradually turn the current limit control down (CCW) and record.

2) Digital multi-meterBefore performing the following procedure, make a neat sketch of the" DMM " front panel;a) Resistance measurement

- obtain a resistance decade box ; prepare the DMM for resistance ; connect the DMM to the box

and set

All switches to zero; select to auto range & record its reading; repeat with the smallest rangesetting.

-select one arbitrary value of resistance in each ranges; record value.

b) Direct current Measurement :

- set the coarse and fine voltage on the power supply to minimum ;select a current ;turn the

current control to maximum ; place short circuit between(+) & (-) terminals; adjust the current to .5A ; Disconnect the short CCt .

_ prepare the DMM to high range (2 A)

_ without looking at the DMM adjust current for reading of 1 A on the panel; record the DMM

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c) Direct voltage Measurement

-adjust the power supply to 10 volts and use the DMM to measure voltage as (+) to (-),,(+) toGnd ,, (-) to Gnd .

-connect the (-) and Gnd & measure the voltage between (+) and Gnd with DMM .

-remove all connections from the power adjust the voltage to 25 V. and measure the (-)to(+)

output voltage with the DMM

3) The function generator

before performing the following procedure , make a neat sketch of the FG front panel;- Turn the power on ; turn Dc offset to off, set frequency to (1 kHz)

- set the function selector to sinusoidal and the amplitude to maximum measure RMS using

DMM.-set the amplitude to minimum; measure the output with DMM Calculate the dynamic range as a

simple ratio:

Vmax/Vin in db : 20 log(Vmax / Vmin).

-return to max amplitude setting: increase the frequency to 10kHZ, & record the reading with

DMM.Repeat with 100 kHz, 1 MHz

What you learn from the experiment:After completion of the experiment must be that I have learned how to use

Dc power supply and Digital multi-meter and the function generator.And calculate the resistance and dc (voltage and current) .