Lesson 2
PRACTICE EXERCISE
1.
What is the resolution of the 9931 DC comparator potentiometer in the
0-.2 volt range?
0.1 V
a.
0.01 V
b.
0.001 V
c.
(1ppm of reading + 0.02 V)
d.
What is the voltage increment per step of the X10-3 measuring dial in
2.
the X0.1 range on the 9931 DC comparator potentiometer?
a.
0.001 volt
b.
0.000,01 volt
c.
0.01 volt
d.
0.000.1 volt
3.
When measuring voltages between 0 and 0.21 volts on the 9931 DC
comparator potentiometer, what should be done to achieve the greatest
measurement accuracy?
a.
Rezero the 9931 with the measuring leads connected and shorted
b.
Rezero the 9931 with the measuring leads connected and open
c.
Rezero the 9931 without measuring leads
d.
Increase the gain of the 9460A Nanovolt amplifier
4.
How is current stability achieved in the 9771 constant current source?
a.
By use of a high stability power supply
b.
By use of a galvanometer light beam-photo transistor amplifier
combination
c.
By use of crystal-controlled oscillator
d.
By use of high impedance filter networks
5.
What is the stability of the 9771 constant current source?
a.
1ppm/12hrs + external standard cell instability
b.
1ppm/24hrs
c.
1ppm/24hrs + external standard cell instability
d.
1ppm/12hrs
6.
How are air bubbles removed from the galvanometer damping fluid in the
9771 constant current source after shipment?
90
a.
Turn
the
9771
through
on
its
right side
45
b.
Turn
the
9771
through
on
its
left side
45
c.
Turn
the
9771
through
on
its
right side
90
d.
Turn
the
9771
through
on
its
left side
49
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