BK Precision 4011A Instrucciones de operaciones descargar pdf (Pagina 23)

Laboratory 4: Instrument Characteristics

201011

R S M M

V I R and V I R

   

R M

S M

V V

R R

 

and

M M

M S M S

R M

V V

R R or R R

V V V

 



(4.1)

Thus, in the circuit shown below, if, for example, V

is 90% of V

then R

= 9∙R

. For ac-

curacy, R

should be as close to the value of R

as possible, but in practice any reasonably

large R

that allows accurate measurements of V

, V

, and R

can yield reasonably accurate

measurement of R

Procedure:

For this step of the experiment with the following circuit, do not adjust the voltmeter’s scale

at any time once measurements have begun.

a) Set Digital Multimeter to VOLTS and its scale to 20V. Set the AC/DC switch to DC.

b) With the DC power supply disconnected from any circuit:

1) Turn on the power supply.

2) Turn “OUTPUT” ON.

3) Adjust the power supply to provide 10.0 V output.

4) Turn “OUTPUT” OFF.

c) Connect the circuit shown below, using a variable resistance box for the resistor R

d) Set the resistance box R

to 0 Ω.

e) Turn the power supply’s “OUTPUT” ON. If necessary, adjust its output voltage to 10.0

volts. This same voltage should be displayed on the digital voltmeter.

f) Record the value indicated on the voltmeter. This initial value is V

g) Increase the resistance R

as large as possible, as long as the voltage V

is at least ½ V

h) Record the voltage V

indicated on the digital voltmeter.

i) Turn off the power supply.

j) Use the second digital multimeter to measure the resistance R

. Record the value.

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BK Precision 4011A Instrucciones de operaciones Pagina 23

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