SECTION 3
Operation
3.1 INTRODUCTION
3.2 POWER UP PROCEDURE
This section contains detailed information concerning the
The information in the following paragraphs describe how
operation of the Model 263 from the front panel. The sec-
to connect the Model 263 to the available line power and
tion is arranged as follows:
turn on the instrument.
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
Power Up Procedure: Describes how to connect the
instrument to line power and turn it on. Other topics
covered include the power up self-tests, power up
default conditions and the required warm up period.
Output Characteristics: Provides the user with some
of the basic output characteristics of the various
sources. Includes discussion on current limiting,
loading and voltage burden. Understanding these
aspects of operation is helpful in obtaining optimum
performance from the instrument.
Function and Range Selection: Details how to select
each sourcing function and how to change ranges.
Data Entry: Describes the two methods that can be
used to program the output reading on the display
of the Model 263.
Operate and Zero: Provides details for using these
two front panel controls.
Guard: Describes how to use the Model 263 in the
guarded output configuration.
Preamp Out: Explains some of the uses for the
preamplifier output, which are accessible from the
rear panel.
Front Panel Programs: Details information for using
the three front panel programs.
3.10 Sourcing Techniques: Outlines how to combine all
the operating controls to properly source each source
parameter.
3.ll Sourcing Considerations: Provides additional infor-
mation on temperature compensation, burden
voltage and guarding.
3.2.1 Line Voltage
The Model 263 may be operated from either 105.l25V or
210-25OV, 50 or 60Hz sources. A special transformer may
be installed (at factory) for 90-1lOV and 180-220V ranges.
The instrument was shipped from the factory set for an
operating voltage that corresponds to the normally
available lie voltage in your area. To check the line voltage
setting, look at the position of the slide switch located on
the rear panel (see Figure 3-l). If the switch is in the wrong
position, the line fuse will probably have to be replaced
with one that has a different rating. Refer to paragraph 8.2
in the maintenance section for the line voltage selection
procedure.
LINE
VOLTAGE
Figure 3-1. Line Voltage Switch
3-l
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