Keithley 7001 User Manual
Model 7001 Switch System
Quick Reference Guide
A GREATER MEASURE OF CONFIDENCE
Model 7001 Switch System
Quick Reference Guide
1992, Keithley Instruments, Inc.
All rights reserved.
Cleveland, Ohio, U.S.A.
Document Number: 7001-903-01 Rev. A
Table of Contents
Safety Precautions.......................................................1
Introduction ................................................................ 5
Operation Summary....................................................6
Menu Structures.........................................................11
Default Conditions....................................................16
Error and Status Messages ......................................... 19
IEEE-488.2 Common Commands and Queries........... 25
SCPI Command Subsystems ...................................... 27
Safety Precautions
The following safety precautions should be observed before
using this product and any associated instrumentation. Although some instruments and accessories would normally be
used with non-hazardous voltages, there are situations where
hazardous conditions may be present.
This product is intended for use by qualified personnel who
recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read the operating information carefully before using the product.
The types of product users are:
Responsible body
the use and maintenance of equipment, for ensuring that the
equipment is operated within its specifications and operating
limits, and for ensuring that operators are adequately trained.
Operators
must be trained in electrical safety procedures and proper use
of the instrument. They must be protected from electric shock
and contact with hazardous live circuits.
Maintenance personnel
product to keep it operating, for example, setting the line
voltage or replacing consumable materials. Maintenance
procedures are described in the manual. The procedures explicitly state if the operator may perform them. Otherwise,
they should be performed only by service personnel.
Service personnel
perform safe installations and repairs of products. Only
properly trained service personnel may perform installation
and service procedures.
Keithley products are designed for use with electrical signals
that are rated Installation Category I and Installation Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement,
control, and data I/O signals are Installation Category I and
must not be directly connected to mains voltage or to voltage
sources with high transient over-voltages. Installation Category II connections require protection for high transient
is the individual or group responsible for
use the product for its intended function. They
perform routine procedures on the
are trained to work on live circuits, and
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over-voltages often associated with local AC mains connections. The user should assume all measurement, control, and
data I/O connections are for connection to Category I sources
unless otherwise marked or described in the Manual.
Exercise extreme caution when a shock hazard is present.
Lethal voltage may be present on cable connector jacks or
test fixtures. The American National Standards Institute
(ANSI) states that a shock hazard exists when voltage lev els
greater than 30V RMS, 42.4V peak, or 60VDC are present.
A good safety practice is to expect that hazardous voltage
is present in any unknown circuit before measuring.
Users of this product must be protected from electric shock
at all times. The responsible body must ensure that users are
prevented access and/or insulated from every connection
point. In some cases, connections must be exposed to potential human contact. Product users in these circumstances
must be trained to protect themselves from the risk of electric
shock. If the circuit is capable of operating at or above 1000
volts,
no conductive part of the circuit may be exposed.
Do not connect switching cards directly to unlimited power
circuits. They are intended to be used with impedance limited sources. NEVER connect switching cards directly to AC
mains. When connecting sources to switching cards, install
protective devices to limit fault current and voltage to the
card.
Before operating an instrument, make sure the line cord is
connected to a properly grounded power receptacle. Inspect
the connecting cables, test leads, and jumpers for possible
wear, cracks, or breaks before each use.
When installing equipment where access to the main power
cord is restricted, such as rack mounting, a separate main input power disconnect device must be provided, in close proximity to the equipment and within easy reach of the operator.
For maximum safety , do not touch the product, test cables, or
any other instruments while power is applied to the circuit
under test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting cables or jumpers, installing or removing
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switching cards, or making internal changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to
the common side of the circuit under test or power line
(earth) ground. Always make measurements with dry hands
while standing on a dry, insulated surface capable of withstanding the voltage being measured.
The instrument and accessories must be used in accordance
with its specifications and operating instructions or the safety
of the equipment may be impaired.
Do not exceed the maximum signal levels of the instruments
and accessories, as defined in the specifications and operating information, and as shown on the instrument or test fixture panels, or switching card.
When fuses are used in a product, replace with same type and
rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections
for measuring circuits, NOT as safety earth ground connections.
If you are using a test fixture, keep the lid closed while power
is applied to the device under test. Safe operation requires the
use of a lid interlock.
If a screw is present, connect it to safety earth ground
using the wire recommended in the user documentation.
!
The symbol on an instrument indicates that the user
should refer to the operating instructions located in the manual.
The symbol on an instrument shows that it can source
or measure 1000 volts or more, including the combined effect of normal and common mode voltages. Use standard
safety precautions to avoid personal contact with these voltages.
The
WARNING
might result in personal injury or death. Always read the as-
heading in a manual explains dangers that
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sociated information very carefully before performing the
indicated procedure.
CAUTION
The
heading in a manual explains hazards that
could damage the instrument. Such damage may invalidate
the warranty.
Instrumentation and accessories shall not be connected to
humans.
Before performing any maintenance, disconnect the line
cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits, including the power
transformer, test leads, and input jacks, must be purchased
from Keithley Instruments. Standard fuses, with applicable
national safety approvals, may be used if the rating and type
are the same. Other components that are not safety related
may be purchased from other suppliers as long as they are
equivalent to the original component. (Note that selected
parts should be purchased only through Keithley Instruments
to maintain accuracy and functionality of the product.) If you
are unsure about the applicability of a replacement component, call a Keithley Instruments office for information.
T o clean an instrument, use a damp cloth or mild, water based
cleaner. Clean the exterior of the instrument only. Do not apply cleaner directly to the instrument or allow liquids to enter
or spill on the instrument. Products that consist of a circuit
board with no case or chassis (e.g., data acquisition board for
installation into a computer) should never require cleaning if
handled according to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the factory for proper cleaning/servicing.
All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.
Other brand and product names are trademarks or registered
trademarks of their respective holders.
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Introduction
This quick reference guide includes summary information on front panel and IEEE-488 operation for the
Model 7001 Switch System. For detailed information,
consult the Model 7001 Instruction Manual.
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Operation Summary
Channel List and Scan List
A Channel List specifies the channels to be closed or
opened, and a Scan List specifies the channels to be
scanned. Each channel in the list is made up of either a
two integer CHANNEL number (for non-matrix type
cards) or a three integer CHANNEL number (for matrix
type cards). Examples:
1!2 = Slot 1, Channel 2
2!4 = Slot 2, Channel 4
1!2!3 = Slot 1, Row 2, Column 3
2!3!6 = Slot 2, Row 3, Column 6
Front panel operation
A Channel List is created with the SELECT CHANNELS
prompt displayed, and a Scan List is created with the
SCAN CHANNELS prompt displayed. The SCAN LIST
key toggles the display between the Channel List and
the Scan List.
Channels are entered into a Channel List and Scan List
using the keypad. The following examples demonstrate
proper format.
SELECT CHANNELS 1!1, 1!5-1!10, 2!1!1, M1,
SCAN CHANNELS 1!10-1!1, 2!1!3, M1,
Each entry is separated by a comma (,) which is inserted
by pressing the right cursor key ( ) or the ENTER key.
Notice that a comma is also used to terminate the list. A
channel range is specified by separating the range limits
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with a hyphen (-). The M1 entry represents a channel
pattern that is stored in memory (see STORE and
RECALL).
Edit keys A list can also be modified by using the edit
keys; DELETE and INSERT. A channel entry can be
deleted by placing the cursor on the desired entry and
pressing DELETE. To insert an entry, press INSERT
(INSERTING ENTRY displayed), place the cursor at the
appropriate location, and key in the new entry. Make
sure to insert a comma after keying in the channel entry.
When finished, press INSERT again to cancel the insert
function.
IEEE-488 bus operation
Over the bus, the Channel List is included with the
commands that are used to close or open channels. See
Closing and Opening Channels. The Scan List is created
using the :SCAN command. The following example
demonstrates proper format:
:SCAN (@ 1!10:1!1, 2!1!3, M1)
Note that range limits are separated by a colon (:), and
the last channel entry in the list is not terminated with a
comma.
Closing and Opening Channels
Front panel operation
Channels specified in the Channel List are closed by
pressing the CLOSE key. Channels specified in the
Channel List are opened by pressing the OPEN key.
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Note that the OPEN ALL key will open all channels,
including those not specified in the Channel List.
IEEE-488 bus operation
Over the bus, the :CLOSe and :OPEN commands are
used to control channels. Note that the Channel List is
included with the following examples:
:CLOSe (@ 1!1, 1!5:1!10, 2!1!1, M1)
:OPEN (@ 1!1, 1!5:1!10, 2!1!1, M1)
Note that a colon (:) is used to separate range limits, and
a comma is not used to terminate the list. The following
command is analogous to the front panel OPEN ALL key
and will simply open all channels:
:OPEN ALL
Scanning Channels
Channels are scanned in the order that they are presented in the Scan List.
Front panel operation
To perform a scan, first program the controlling aspects
of the scan (see T able 2), and then press STEP to take the
Model 7001 out of the idle state (ARM indicator on).
Regardless of how the scan is configured, the STEP key
is always active allowing you to manually step through
the scan.
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The scan can be terminated at any time by pressing the
OPEN ALL key. All closed channels will open and the
Model 7001 will return to the idle state (ARM indicator
off).
IEEE-488 operation
Over the bus, a scan is configured using the :TRIGger
subsystem commands.
Send the following command to take the Model 7001
out of the idle state and begin a scan:
:INITiate
The scan can be terminated by sending the following
command:
:ABORt
All closed channels will open and the Model 7001 will
return to the idle state.
Store and Recall
Up to 100 channel patterns can be stored in memory. A
channel pattern is simply a displayed pattern of open
and closed channels.
Front panel operation
1. Close the desired channels.
2. Press STORE and enter the desired memory location (1 to 100).
3. Press ENTER.
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To recall a channel pattern from memory:
1. Press RECALL and enter the memory location of the
stored channel pattern.
2. Press ENTER. The channel status display will immediately update to reflect the recalled channel pattern.
Another way to recall a channel pattern is to include a
memory location (e.g. M36) in a Channel List and/or
Scan List. In a Channel List, when CLOSE is pressed, the
closed channels in the specified channel pattern will
close, and when OPEN is pressed, the channels will
open. In a Scan List, when the memory location is
scanned, the channel status display will update to
reflect the specified channel pattern. The closed channels in the channel pattern will remain closed unless a
different channel pattern is scanned.
IEEE-488 bus operation
Over the IEEE-488 bus, the :SAVe and :RECall commands are used to save (store) and recall channel patterns. The following examples demonstrate proper
format:
:MEMory:SAVe M36
:MEMory:RECall M36
As in front panel operation, a memory location can be
included in the Channel List and/or Scan List.
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