Lesson 4
PRACTICE EXERCISE
1.
What is the accuracy of the 845AR Null Detector?
a.
(3%
end
scale
+
0.1
microvolt)
b.
(3%
end
scale
+
1.0
microvolt)
c.
(1%
end
scale
+
0.3
microvolt)
d.
(1%
end
scale
+
3.0
microvolt)
2.
What is the input impedance
of
the
845AR NW1
Detector
above
100
millivolt range?
a.
10 megohm
b.
100 megohm
c.
500 megohm
d.
1 megohm
3.
Which terminal is strapped to the common terminal on the 845AR Null
Detector?
a.
Ground
b.
Negative
c.
Guard
d.
Positive
4.
What uses can the 845AR Null Detector be used for?
a.
Voltmeter, voltage divider, and amplifier
b.
Amplifier, voltmeter, and bridge detector
c.
Differential voltmeter, voltage divider, and bridge detector
d.
Bridge detector, differential voltmeter, and amplifier
5.
What components provide the drive signal for the photocell modulators
V101 and V102 in the 845AR Null Detector?
a.
DS101 and DS102
b.
DS1 and DS2
c.
CR104 and CR105
d.
CR106 and CR107
6.
What is the output of Q111 and Q112 with a full range input on any
range of the 845AR Null Detector?
a.
1 volt ac
b.
1 millivolt dc
c.
1 volt dc
d.
100 microvolts dc
90
Previous Page
