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Keithley 2001 Manual

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Front Panel Operation
3-4 2001-900-01 Rev. K/ August 2010
WAR NI NG
Dangerous arcs of an explosive nature in a
high energy circuit can cause severe per-
sonal injury, or death. If the multimeter is
connected to a high energy circuit when
set to a current range, low resistance
range, or any other low impedance range,
the circuit is virtually shorted. Dangerous
arcing can result even when the multime-
ter is set to a voltage range if the minimum
voltage spacing is reduced.
When making measurements in high energy circuits, use test
leads that meet the following requirements:
• Test leads should be fully insulated.
• Only use test leads that can be connected to the circuit
(e.g., alligator clips, spade lugs, etc.) for hands-off
measurements.
• Do not use test leads that decrease voltage spacing. This
diminishes arc protection and creates a hazardous con-
dition.
Use the following sequence when testing power circuits:
1. De-energize the circuit using the regular installed con-
nect-disconnect device, such as a circuit breaker, main
switch, etc.
2. Attach the test leads to the circuit under test. Use appro-
priate safety rated test leads for this application.
3. Set the multimeter to the proper function and range.
4. Energize the circuit using the installed connect-discon-
nect device and make measurements without discon-
necting the multimeter.
5. De-energize the circuit using the installed connect-dis-
connect device.
6. Disconnect the test leads from the circuit under test.
WAR NI NG
The maximum common-mode voltage
(voltage between INPUT LO and chassis
ground) is 500V peak. Exceeding this val-
ue may cause a breakdown in insulation,
creating a shock hazard.
3.2.5 Power-on default conditions
Power-on default conditions are those conditions the
instrument assumes when it is first turned on. You can
change these power-on default conditions (except the
primary address) by using the save setup feature that is
available with the MENU key, as described in paragraph
3.12.1. Depending on the installed memory option, either
one, five, or ten user-defined setups can be stored, any one of
which could be selected as the power-on default.
A table in paragraph 3.12.1 lists the default conditions that
are set at the factory to optimize bench and GPIB (IEEE-
488) operation.
3.2.6 Warm-up period
The Model 2001 can be used within one minute after it is
turned on. However, the instrument should be turned on and
allowed to warm up for at least one hour before use to
achieve rated accuracy.
3.2.7 IEEE-488 primary address
The IEEE-488 primary address of the instrument must be the
same as the primary address you specify in the controller’s
programming language. The default primary address of the
instrument is 16, but you can set the address to any value
from 0 to 30 by using the MENU key. Refer to paragraph
3.12.2 for step-by-step instructions on setting the primary
address. Section 4 contains details on using the Model 2001
over the IEEE-488 bus.
3.3 Display
The display of the Model 2001 is primarily used to display
readings along with the units and type of measurement.
When not displaying readings, it is used for informational
messages, such as menu headings and selections. At the top
of the display are annunciators to indicate various states of
operation.
3.3.1 Display format
As shown in Figure 3-1, the front panel has two lines of
display information:
… 36 …


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