Operation; General Operating Characteristics; Reset; Pre-Operating Instructions - HP 3456A Operating And Service Manual

3-1_ INTRODUCTION.

3-2. This is the information and instructions for the
operation of the -hp- Model 3456A Voltmeter showing
front panel and remote operations. In addition. you will
find functional checks you can perform. For more ad­
vanced users a Quick Reference Guide is shipped with
the instrumem. The information in the guide is most of
the 3456A's operating characteristics, including remote
programming codes.
3-3. Before reading the operating information in this
section, familiarize yourself with the front and rear
panel features as indicated in Figure 3-1. Use the figure
as a reference while reading this section.
3-4. Read the front panel operations of the 3456A
before the femme operations since most front panel
operations also apply to the remote operations.
3-5. PRE-OPERATlNG INSTRUCTIONS.
3-6. The 3456A's operation can be separated into five
main areas. A good understanding of these areas is fun­
damental to learning the operation of the instrument.
The five areas are:
a. Reset and Test Operation.
b. Function, Range and Trigger.
c. Voltmeter Control Functions, (Delay, Number of
Readings/Trigger, Number of Digits Displayed).
d. Math.
e. Remote Operation.
3-7. Refer to Figure 3-1. Note that the 3456A's front
panel can be separated into three areas: Display,
Voltmeter Configuration, and Numbered Keyboard.
Keep these areas in mind when you use the 3456A.
3-8. To learn the operation of the instrument, a logical
approach is to ask yourself the following questions:
a. "What type of measurement do I want to make?"
- FUNCTION
b. "Do I want autoranging?" - RANGE
SECTION III

OPERATION

c. "Do I want the input filter in?" - FILTER
d. "Is a math operation desired?" - MATH FUNC­
TION
e. "Do I want remote control of the 3456A?"
-REMOTE OPERATION
Once you have decided what you want the 3456A to do,
the next step is to learn how to do it.

3-9. GENERAL OPERATING CHARACTERISTICS.

3-10. These paragraphs describe some of the 3456A's
General Operating Characteristics. Refer to Figure 3-2,
the Display Area. for the following discussion.
3·11. Turn·On and Warm· Up.
3-12. Before connecting ac power to the 3456A, make
sure the rear panel line selet:tor switches are set to cor­
respond to the available power line voltage. Be certain
the correct fuse is installed in the instrument. To meet
accuracy specifications, the 3456A should be warmed
up for at least one hour.
3·13. Rasat.
3-14. After power connection and warm-up, to make
sure the instrument is in the "turn-on" state, press the
RESET button. This places the instrument in the power­
up condition without cycling power. This provides you a
convenient starting place and avoids thermal and elec­
trical shock
10
accuracy and improving reliability. The turn-on state is:
FUNCTION .
RANGE .
_ . _ . _
TRIGGER .
MATH .
. . . . .
DELAy . . . . . . . . . . . . . . . . . . DEFAULT (0 SEC.)
NUMBER OF READ-
INGS/TRIGGER
NUMBER OF POWER
LINE CYCLES INT
NUMBER O F DIGITS DISPLAYED
AUTOZERO .
OPERATING MODE
FILTER
_ _ _ . . . . . . . . . . . . . . . . . _ . _ _ . _ .
READING STORAGE
the instrument, therefore maintaining its
. . . . .
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. . . . . . . . . INTERNAL
_ . _ . _ . _ _ _ . . .
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. . .
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_ _ . _ _ _ _ . . . . . . . . . . . _ _ . .
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. _ . . _ _ _ . _ _ .
. . . . . . . • . . . . . . _ . _ _ _
. DC
AUTO
. OFF
. . .
. . . . . I
. . .
1 0
. . . . . 5
_ . . .
_ ON
. LOCAL
. .
. . . OFF
.
OFF
3-1