Keithley 7002 User manual

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Model 7002
Switch System
Quick Reference Guide
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Model 7002 Switch System
Quick Reference Guide

1993, Keithley Instruments, Inc.
All rights reserved.
Cleveland, Ohio 44139 U.S.A.
Document Number: 7002-903-01 Rev. B / 4-00
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Table of Contents
Safety Precautions................................................................1
Introduction..........................................................................3
Operation Summary.............................................................4
Menu Structures.................................................................16
Default Conditions.............................................................21
Error and Status Messages.................................................24
Status Registers..................................................................27
IEEE-488.2 Common Commands .....................................31
SCPI Command Subsystems .............................................33
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1
Safety Precautions
The following safety precautions should be observed before
using this product and any associated instrumentation. Al-
though 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 pre-
cautions required to avoid possible injury. Read the operating
information carefully before using the product.
The types of product users are:
Responsible body is the individual or group responsible for
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 use the product for its intended function. They
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 perform routine procedures on the
product to keep it operating, for example, setting the line volt-
age or replacing consumable materials. Maintenance proce-
dures are described in the manual. The procedures explicitly
state if the operator may perform them. Otherwise, they
should be performed only by service personnel.
Servicepersonnel are trained to work on live circuits, and per-
form safe installations and repairs of products. Only properly
trained service personnel may perform installation and service
procedures.
Exercise extreme caution when a shock hazard is present. Le-
thal 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 levels greater
than 30V RMS, 42.4V peak, or 60VDC are present.
A good
safetypracticeistoexpectthathazardousvoltageis
presentinanyunknowncircuitbeforemeasuring.
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2
Users of this product must be protected from electric shock at
all times. The responsible body must ensure that users are pre-
vented 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 cir-
cuit is capable of operating at or above 1000 volts,
noconduc-
tive part of the circuit may be exposed.
As described in the International Electrotechnical Commis-
sion (IEC) Standard IEC 664, digital multimeter measuring
circuits (e.g., Keithley Models 175A, 199, 2000, 2001, 2002,
and 2010) are Installation Category II.All other instruments’
signal terminals are Installation Category I and must not be
connected to mains.
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.
For maximum safety, do not touch the product, test cables, or
any other instruments while power is applied to the circuit un-
der test. ALWAYS remove power from the entire test system
and discharge any capacitors before: connecting or discon-
necting cables or jumpers, installing or removing switching
cards, or making internal changes, such as installing or remov-
ing jumpers.
Donottouchany object thatcouldprovide a currentpathtothe
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.
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3
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 connec-
tions.
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 us-
ing 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 manu-
al.
The symbol on an instrument shows that it can source
or measure 1000 volts or more, including the combined ef-
fect of normal and common mode voltages. Use standard
safety precautions to avoid personal contact with these volt-
ages.
The
WARNING heading in a manual explains dangers that
might result in personal injury or death.Always read the asso-
ciated information very carefully before performing the indi-
cated procedure.
The
CAUTION 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 hu-
mans.
Before performing any maintenance, disconnect the line cord
and all test cables.
!
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4
To maintain protection from electric shock and fire, replace-
ment components in mains circuits, including the power trans-
former, 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 pur-
chasedfromothersuppliers as long as theyare equivalent to the
original component. (Note that selected parts should be pur-
chasedonlythroughKeithleyInstruments to maintain accuracy
and functionality of the product.) If you are unsure about the
applicability of a replacement component, call a Keithley In-
struments office for information.
To 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 be-
comes contaminated and operation is affected, the board
should be returned to the factory for proper cleaning/servic-
ing.
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5
Introduction
This quick reference guide includes summary information
on front panel and IEEE-488 operation for the Model 7002
Switch System. For detailed information, consult the Model
7002 Instruction Manual.
All Keithley product names are trademarks or registered trademarks
of Keithley Instruments, Inc.
Other brand and product names are trademarks or registered trade-
marks of their respective holders.
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6
Operation Summary
Card type
On power-up, the Model 7002 detects Model 701X series
cards that are installed and automatically configures itself
for proper operation. Non-701X series card are not detected
by the Model 7002. The model number of each non-701X
series card must be assigned to the slot that it is installed in.
The TYPE selection in the CARD CONFIG MENU allows
you to check and/or change the card type assignment for
each slot:
Press: CARD CONFIGURATION
Select: TYPE
SLOT-#1 through SLOT-#10
Use the cursor keys ( and ) to check card type assign-
ment for any slot. To change a slot assignment, select the
slot, use the cursor keys to change the card type and press
ENTER.
An empty slot can be used as a simulator by assigning it the
model number 9990 (40-channel multiplexer) or 9991 (4 ×
10 matrix).
Light pen option
Point and click programming using the light pen provides
an easy and fast method to enter channels into the channel
list and scan list.You simply point the pen at the appropriate
channel LED and press the button on the barrel.
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7
Control LEDs are also provided to perform other operations
using the light pen. Most of these LEDs simply perform the
same operations as their front panel key counterparts.
The light pen is operational when it is plugged into the front
panel receptacle labeled LIGHT PEN.
Display modes
There are two basic display modes for the Model 7002; the
relay status display mode and the list display mode. The
VFD messages for the display modes are shown as follows:
In addition to the basic display modes, you can also control
the LED Graticule. Disbling the LED Graticule eliminates
the dimly lit state for LEDs. LEDs are either off or brightly
lit. See LED Graticule Control for more details.
Relay status display mode
In this display mode, the channel LEDs indicate the status
(open or closed) of each channel. Table 1 summarizes the
significance of the channel LEDs in this display mode.
Use the relay status display mode when closing/opening or
scanning channels so that you can monitor the real-time
state of each switch in your system.
Relay Status Display Mode List Display Mode
RELAY STATUS CHANNEL LIST DISPLAY
or
SCAN LIST DISPLAY
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8
List display mode
In this display mode, the channel LEDs indicate which
channels are included in the selected list (channel list or
scan list). Table 1 summarizes the significance of the chan-
nel LEDs in this display mode.
If you use this display mode when creating a list, be sure to
return to the relay status display mode so that you can mon-
itor the real-time state (on or off) of each available channel
in your switch system.
Changing the display mode
The display mode can be changed through the MAIN
MENU:
Press: MENU
Select: GENERAL
Select: DISPLAY
Select: SHOW-LIST
RELAY-STATUS CURRENT-LIST
RELAY STATUS selects the Relay Status Display Mode
and CURRENT LIST selects the List Display Mode (see
Menu Structures).
The display mode can also be changed by using the optional
light pen. To toggle the display mode, simply click the
SHOW LIST LED.
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9
LED graticule control
LED Graticule control allows you to increase contrast
between on and off LEDs by eliminating the dimly lit state
for LEDs. With the LED Graticule disabled (off), LEDs will
be either off or brightly lit. Table 1 explains the significance
of the channel LEDs for the two graticule modes.
LED Graticule control is performed from the MAIN MENU
as follows:
Press: MENU
Select: GENERAL
Select: DISPLAY
Select: GRATCULE-CONTROL
ON OFF
Select OFF to disable the LED Graticule or ON to enable it.
Table 1: Significance of channel LEDs
Display
mode LED graticule
Channel LEDs
Off Dimly lit Brightly lit
Relay
status On Channel not available Channel open Channel closed
Off Channel not
available or
Channel open
— Channel
closed
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10
Default configurations
From the front panel, default configurations are accessed
from the MAIN MENU. Refer to Menu Structures for addi-
tional information on using the MAIN MENU.
RESET — The RESET default conditions are listed in
Table 5. RESET is performed from the SAVESETUP selec-
tion in the MAIN MENU as follows:
Press: MENU
Select: SAVESETUP
Select: RESET
Factory Defaults — The instrument will return to the fac-
tory default conditions listed in Table 5 on power-up if the
Power-On Default is set for Factory Default as follows:
List On Channel not
available Channel not
included
inselected
list
Channel
includedin
selected
list
Off Channel not
available or
channel not
included in
selected list
— Channel
includedin
selected
list
Table 1: Significance of channel LEDs (cont.)
Display
mode LED graticule
Channel LEDs
Off Dimly lit Brightly lit
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11
Press: MENU
Select: SAVESETUP
Select: PWRON
Select: FACTORY-DEFAULT
User Saved Defaults — Up to ten setup configurations can
be saved for future recall. The save and restore operations
are performed from the SAVESETUP selection in the
MAIN MENU as follows:
Press: MENU
Select: SAVESETUP
SAVE RESTORE
Use the SAVE selection to save the setup in a memory loca-
tion (0-9). Use the RESTORE selection to return the instru-
ment to the configuration saved at the specified memory
location.
The instrument will return to user saved defaults on power-
up if the Power-On Default is set for User Setup as follows:
Press: MENU
Select: SAVESETUP
Select: PWRON
Select: USER-SETUP
Use the USER SETUP selection to specify the memory
location that contains the saved configuration.
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Over the IEEE-488 bus, the following commands can be
used to perform the same save and restore operations:
*SAV <NRf> Save current setup configura-
tion in memory (0 to 9).
*RCL <NRf> Restore 7002 to setup config-
uration saved at specified
memory location (0 to 9).
:SYSTem:POSetup SAVX Program 7002 to power-on to
the setup saved at memory
location X (where X = 0 to 9).
Bus Defaults — Over the IEEE-488 bus, the following
commands can be used to return the Model 7002 to default
conditions:
*RST Return 7002 to *RST defaults
listed in Table 5.
:SYSTem:PRESet Return 7002 to :SYSTem:
PRESet defaults listed in
Table 6.
The Model 7002 can be programmed to power-on to the
*RST or :SYSTem:PRESet defaults by sending one the fol-
lowing commands over the bus:
:SYSTem:POSetup RST Power-on to the *RST
defaults.
:SYSTem:POSetup PRESet Power-on to the :SYSTem:
PRESet defaults.
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.
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13
Channel assignment formats
Creating a list
1. Select the desired list (Channel List or Scan List).
Press the SCAN LIST key or click the SCAN LIST
LED to toggle from one list to the other.
2. Enter channels into selected list:
A. Keypad Method — Use the number keys to enter
the channel assignment. Press ENTER or to
separate entries or terminate the list. Use the
hyphen key (-) to specify a channel range (i.e.
1!1-1!10).
B. Light Pen Method — Click the corresponding
channel LED to enter the channel into the list. Use
the hyphen LED (-) to specify a channel range
(i.e. 1!1-1!10).
Channel List Prompt Scan List Prompt
SELECT CHANNELS SCAN CHANNELS
Matrix Card Non-Matrix Card
S!R!C S!C
S = Slot (1-10)
R = Row (1-4)
C = Column (1-10)
S = Slot (1-10)
C = Channel (1-40)
Examples: 2!3!6 = Slot 2, Row 3, Column 6
9!38 = Slot 9, Channel 38
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Edit Keys and LEDs:
Cursor ( and ) — Select a channel entry by positioning
the cursor on it.
DELETE — Press (or click) to delete selected entry.
INSERT — Press (or click) INSERT to enable insert func-
tion, place cursor at desired location in list and enter chan-
nel(s). Press (or click) INSERT a second time to disable
insert function.
BACKSPACE — Click this LED to move the cursor to the
left and delete the channel entry.
HOME — Click this LED to move the cursor to the begin-
ning of the list.
END — Click this LED to move the cursor to the end of the
list.
IEEE-488 bus commands — Over the bus, the Channel
List is included with the commands to open and close chan-
nels (see Closing and Opening Channels). The Scan List is
created using the :SCAN <list> command. Examples:
:SCAN (@ 5!4, 5!6, 5!8)
Scan List = channels 4, 6 and 8 of Slot 5.
:SCAN (@ 1!1:1!40)
Scan List = channels 1 through 40 of Slot 1.
Closing and opening channels
CLOSE key or CLOSE LED — Use to close channels
specified in the displayed (selected) Channel List.
OPEN key or OPEN LED — Use to open channels speci-
fied in the displayed (selected) Channel List.
OPEN ALL key or OPEN ALL LED — Use to open all
channels.
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IEEE-488 Bus Commands — Over the bus, the :CLOSe
and :OPEN commands are used to control channels. Exam-
ples:
:CLOSe (@ 4!1, 4!5) Close channels 1 and 5 of Slot 4.
:OPEN (@ 4!1, 4!5) Open channels 1 and 5 of Slot 4.
:OPEN ALL Open all channels.
Scanning channels
Channels are scanned in the order that they are presented in
the Scan List. To perform a scan, first program the control-
ling aspects of the scan (see Table 4), and then press (or
click) STEP to take the Model 7002 out of the idle state
(ARM indicator on).
Regardless of how the scan is configured, the STEP key (or
LED) is always active allowing you to manually step
through the scan. The scan can be terminated at any time by
pressing (or clicking) OPEN ALL. All closed channels will
open and the Model 7002 will return to the idle state (ARM
indicator off).
IEEE-488 bus commands — Over the bus, a scan is con-
figured using the Trigger Subsystem commands (see Table
16). The following command starts the scan by taking the
Model 7002 out of the idle state:
:INITiate
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The scan can be terminated by sending the following com-
mand:
:ABORt
All closed channels will open and the Model 7002 will
return to the idle state.
Channel patterns (STORE and RECALL)
Up to 500 channel patterns can be stored in memory. A
channel pattern is simply a pattern of open and closed chan-
nels.
There are two methods to store a channel pattern. One
method is to store an actual open and closed pattern of
relays (RELAY PATTERN) and the other method is to store
the channel list (CURRENT LIST).
When a RELAY PATTERN is recalled, each channel will
assume the state determined by the stored relay pattern.
When a CURRENT LIST is recalled, the channels con-
tained in the stored Channel List will close. Channels not
included in the list will open.
Storing a Relay Pattern:
1. Close the desired channels.
2. Press STORE and select RELAY PATTERN.
3. Key in the memory location (1 to 500) and press
ENTER.
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