Electrometer/High Resistance Meter
Getting Started Manual
A GREATER MEASURE OF CONFIDENCE
WARRANTY
Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a
period of 1 year from date of shipment.
Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables,
rechargeable batteries, diskettes, and documentation.
During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.
To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in
Cleveland, Ohio. You will be given prompt assistance and return instructions. Send the product, transportation
prepaid, to the indicated service facility. Repairs will be made and the product returned, transportation prepaid.
Repaired or replaced products are warranted for the balance of the original warranty period, or at least 90 days.
LIMITATION OF WARRANTY
This warranty does not apply to defects resulting from product modification without Keithley’s express written
consent, or misuse of any product or part. This warranty also does not apply to fuses, software, non-rechargeable
batteries, damage from battery leakage, or problems arising from normal wear or failure to follow instructions.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.
THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES.
NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR
ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF
THE USE OF ITS INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS
BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED TO: COSTS OF REMOVAL AND INSTALLATION,
LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON, OR DAMAGE TO PROPERTY.
The print history shown below lists the printing dates of all Revisions and Addenda created
for this manual. The Revision Level letter increases alphabetically as the manual undergoes
subsequent updates. Addenda, which are released between Revisions, contain important
change information that the user should incorporate immediately into the manual. Addenda
are numbered sequentially. When a new Revision is created, all Addenda associated with the
previous Revision of the manual are incorporated into the new Revision of the manual. Each
new Revision includes a revised copy of this print history page.
Revision A (Document Number 6517A-903-01) .................................................... September 2000
Revision B (Document Number 6517A-903-01) ..............................................................June 2003
All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.
Other brand names are trademarks or registered trademarks of their respective holders.
S
afety 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 and follow all installation, operation, and maintenance information carefully before using the product. Refer to the manual for complete product specifications.
If the product is used in a manner not specified, the protection provided by the product may be impaired.
The types of product users are:
Responsible body
ment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.
Operators
instrument. They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel
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
trained service personnel may perform installation and service procedures.
Keithley products are designed for use with electrical signals that are rated Measurement Category I and Measurement Category
II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement, control, and
data I/O signals are Measurement Category I and must not be directly connected to mains voltage or to voltage sources with
high transient over-voltages. Measurement Category II connections require protection for high transient over-voltages often associated with local AC mains connections. 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 levels greater than 30V RMS,
42.4V peak, or 60VDC are present.
circuit before measuring.
Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators
are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential
human contact. Product operators 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,
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 ca-
is the individual or group responsible for the use and maintenance of equipment, for ensuring that the equip-
use the product for its intended function. They must be trained in electrical safety procedures and proper use of the
perform routine procedures on the product to keep it operating properly, for example, setting the line
are trained to work on live circuits, and perform safe installations and repairs of products. Only properly
A good safety practice is to expect that hazardous voltage is present in any unknown
no conductive part of the circuit may be exposed.
5/03
bles or jumpers, installing or removing 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 symbol indicates a connection terminal to the equipment frame.
The
WARNING
information very carefully before performing the indicated procedure.
The
CAUTION
ranty.
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.
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 becomes contaminated and operation is affected, the board should be returned to the factory for
proper cleaning/servicing.
heading in a manual explains dangers that might result in personal injury or death. Always read the associated
heading in a manual explains hazards that could damage the instrument. Such damage may invalidate the war-
Figure 3-2Hierarchy of the example SENSe1 commands ...................... 3-8
1
Front Panel Operation
1-2Front Panel OperationModel 6517A Getting Started Manual
Product overview
If you have any questions after reviewing this information, please contact your local
Keithley representative, or call one of our Applications Engineers at 1-800-348-3735 (U.S.
and Canada only). Worldwide phone numbers are listed in the front of this manual.
The Model 6517A is a 6½-digit electrometer/high resistance system with the following
measurement capabilities:
•DC voltage measurements from 1µV to 210V
•DC current measurements from 10aA to 21mA
•Charge measurements from 10fC to 2.1µC
•Resistance measurements from 10Ω to 210T
•Surface resistivity measurements
•Volume resistivity measurements
•External temperature measurements from -25°C to 150°C using the supplied
Model 6517-TP thermocouple
•Relative humidity measurements (0 to 100%) using the optional Model 6517-RH
probe
Ω
Model 6517A Getting Started ManualFront Panel Operation1-3
Some additional capabilities of the Model 6517A include:
•Built-in V-Source — The 100V range provides up to 100V at 10mA, while the
1000V range provides up to 1000V at 1mA
•Data storage
•Single button zeroing (REL)
•Built-in math functions
•Filtering; averaging and median
•Built-in test sequences
•Remote operation using the IEEE-488 (GPIB) bus or the RS-232 interface
•Model 617 emulation using the DDC (device-dependent command) programming
language mode
•Scan (measure) channels of an external scanner (e.g., Model 706, 7001, or 7002)
•Scan (measure) channels of an internal scanner card (e.g., Model 6521 or 6522)
installed in the option slot
The Model 6517A front and rear panel overviews (Figure 1-1 and Figure 1-2) include
important abbreviated information that should be reviewed before operating the
instrument.
1-4Front Panel OperationModel 6517A Getting Started Manual
Moves to higher range; increments digit
Moves to lower range; decrements digit
(not shown) Pull out and rotate to desired position.
5 DISPLAY KEYS
PREV/NEXT Scroll through multiple displays of a function
Model 6517A Getting Started ManualFront Panel Operation1-5
6 OPERATION KEYS
Z-CHKEnables/disables zero check. Enable zero check before changing functions.
RELEnables/disables relative reading
FILTERDisplays digital filter status for present function and toggles filter on/off
MATHDisplays math calculation and toggles math on/off if configured
TRIGTriggers unit
SEQPerforms selected test sequence
and
INFOShows context-sensitive information about the present display
LOCALCancels remote operation
STOREEnables data storage
RECALLDisplays reading data (reading, number, time). Use PREV/NEXT DISPLAY for maxi-
CONFIGConfigures functions and operations
MENUSaves/restores instrument conditions; sets up communications; performs calibration
EXITCancels selection, moves back within menu structure
ENTERHolds reading, enters selection, moves down within menu structure
Moves cursor among data entry digits, menu selections, and information displays
mum, minimum average, standard deviation.
and self-tests; defines limits, digital output, and other miscellaneous operations (see
Table 2-2)
7 VOLTAGE SOURCE KEYS
OPERToggles V-source between operate and standby
and
8 VOLTAGE SOURCE OPERATE
Adjusts V-source value
Indicator on when in operate, off when in standby
9 OPTION CARD KEY
Use to program and operate an installed option. Also used to scan
external scanner channels.
1-6Front Panel OperationModel 6517A Getting Started Manual
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Figure 1-2
Model 6517A rear panel overview
23 5 49810
1010V
PEAK
!
INPUT
250V PEAK
PREAMP OUT
TEMP
TYPE K
250 PEAK
OPTION SLOT
COMMON 2V ANALOG
OUTPUT
HUMIDITY
LO
V SOURCE
750V
PEAK
EXT TRIGINMTR COMP
RS232
OUT
!
INTERLOCK
DIGITAL
I/O
HI
SELECTED
LINE VOLTAGE
90-110V
105-125V
TRIG LINK
180-220V
210-250V
115V
LINE RATING
50-60HZ
50VA MAX
AC ONLY
IEEE-488
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
LINE FUSE
SLOWBLOW
1/2A 90-125V
1/4A 180-250V
MADE
U.S.A.
IN
11
1
Input High
Input Low
Chassis Ground
Unguarded (Guard off)
Input High
Guard
Chassis Ground
Guarded (Guard on)
6715 1614 1312
17
EXTERNAL TRIGGER INPUT
Trigger Reading
TTL HI
>10µsec
TTL LO
BNC CONNECTIONS
METER COMPLETE OUTPUT
Reading Complete
TTL HI
>10µsec
TTL LO
HI
LO (Chassis)
1INPUT CONNECTOR (see Figure 1-2)
Unguarded Configuration Disable GUARD for amps, ohms, coulombs and unguarded volts
Guarded ConfigurationEnable GUARD for guarded volts measurements.
2TEMP TYPE K
Connect the Model 6517-TP type K thermocouple for temperature
measurements.
measurements.
3PREAMP OUT
Follows the signal amplitude applied to the INPUT terminal. With
GUARD on, PREAMP OUT is internally connected to the inner shell of the INPUT triax
connector to configure the input for guarded volts measurements. Referenced to
COMMON. See the Model 6517A User’s Manual for more information.
Model 6517A Getting Started ManualFront Panel Operation1-7
42V ANALOG OUTPUT
to COMMON. Typically connected to a measuring device such as a chart recorder. See
the Model 6517A User’s Manual for more information.
5COMMON
resistor.
6CHASSIS GROUND
line cord. COMMON can be connected to chassis ground by installing the ground link.
For floating measurements, make sure the ground link connection between COMMON
and Chassis Ground is open.
7HUMIDITY
measurements.
8V-SOURCE HI and LO
9LINE VOLTAGE SWITCH
line power voltage. A 90 to 125V line voltage requires the 115V setting, while a 180 to
250V line voltage requires the 230V setting.
10POWER LINE INPUT
power cord.
11LINE FUSE
For the 230V setting, use a ¼A, 250V, slow blow, 5×20mm fuse.
12IEEE-488 CONNECTOR
shielded IEEE-488 cables.
Binding post that is internally connected to INPUT low through a 0.6Ω
Connect the optional Model 6517-RH probe for relative humidity
For the 115V line voltage setting, use a ½A, 250V, slow blow, 5×20mm fuse.
Binding post provides a scaled 0 to 2V output that is referenced
Binding post that connects the chassis to ground through the power
Banana jacks for the voltage source.
Two-position slide switch configures instrument for available
Connect to power line (50 or 60Hz) grounded outlet using 3-wire
Connects the instrument to the IEEE-488 (GPIB) bus. Use
13TRIG LINK
and from other instruments.
14DIGITAL I/O
lines.
15RS-232
16INTERLOCK
the Model 8002A High Resistance Test Fixture using the appropriate cable.
17OPTION SLOT
in this slot.
An 8-pin micro DIN connector for sending and receiving trigger pulses to
An 8-pin micro DIN connector for the four TTL-compatible digital output
DB-9 connector for the RS-232 interface. Use a standard RS-232 cable.
Connects the safety interlock to the Model 8009 Resistivity Test Fixture or
An option card, such as the Model 6521 or 6522 scanner card, installs
1-8Front Panel OperationModel 6517A Getting Started Manual
Display
As shown in the Model 6517A front panel overview (Figure 1-1), the front panel has three
lines of display information: the primary display line, the secondary display line, and
annunciators.
•Primary Display Line — The top line displays readings along with units. It can also
display measurement type, “hold”, math operating type, channel number, menu
headings and messages. Error and status messages are listed in Section 2 of the
User’s Manual.
•Secondary Display Line — The bottom line displays the range, V-Source value,
menu items, messages and multiple displays (see Measurement Options section of
this manual). Longer text strings are indicated by arrows on either end of the dis-
play line. Use the cursor keys (
and ) to display the additional information.
Power-up
WARNING
Use the front panel POWER switch to turn power on and off.
During power-up, the Model 6517A performs self-tests on its memory elements. If a failure occurs, the instrument momentarily displays an error message and turns on the ERR
annunciator. If the instrument passes the self-tests, the firmware revision level and bus
interface information are displayed.
For complete information on the power-up sequence, see Section 2 in the User’s Manual.
Warm-up
The instrument is ready for use as soon as the power-up sequence is completed. However,
to achieve rated accuracy, allow the instrument to warm up for one hour. If the instrument
has been subjected to extreme temperatures, allow additional time to allow internal temperatures to stabilize.
Before turning on the Model 6517A, make sure it is connected to a
grounded power receptacle using the supplied power cord or the equivalent. Failure to properly ground the unit creates a shock hazard that
could result in injury or death.
Model 6517A Getting Started ManualFront Panel Operation1-9
Bench defaults
The Model 6517A can save ten user setups in non-volatile memory. You can select one of
the user setups as the power-on default or have the instrument power up to either of the
two factory defaults (optimized for “BENCH” or “GPIB” operation).
Since the basic measurement procedures in this manual assume the BENCH defaults, reset
the instrument from the SAVESETUP item of the MAIN MENU by performing the following steps:
1.Press the MENU key to display the main menu:
MAIN MENU
SAVESETUP COMMUNICATION CAL
TEST LIMITS STATUS-MSG GENERAL
2.If the SAVESETUP option is not blinking, press the key until it is blinking and
then press ENTER to view the setup menu:
SETUP MENU
SAVE RESTORE POWERON RESET
3.Select the RESET option and press ENTER to view the reset menu:
RESET ORIGINAL DFLTS
BENCH GPIB
4.Select the BENCH option and press ENTER. The following message is displayed:
RESETTING INSTRUMENT
Enter to confirm; EXIT to abort
5.Press ENTER to confirm. The display will go to the volts function with auto-range
disabled and zero check enabled.
Other BENCH default settings for each function include:
•Triggers — Continuous measurements.
•Measurement speed (integration time) — Normal, 1 power line cycle.
•Digital filter — Enabled, averaging, 10 readings.
•Median filter — Enabled, rank 1.
•Display resolution — 5½ digits.
Note: See “Menus” in the Measurement Options section of this manual for details on navigating the Main Menu.
Changing functions
To avoid erratic operation, always enable zero check (“ZeroCheck” displayed) before
selecting one of the other measurement functions (V, I, R, or Q). The Z-CHK key controls
zero check. See “Zero Check” in Section 2 for more information on the zero check feature.
1-10Front Panel OperationModel 6517A Getting Started Manual
Voltage measurements
Assuming “BENCH” reset conditions, the basic procedure is as follows:
1.With zero check enabled (“ZeroCheck” displayed), select the volts function by
pressing V. The Z-CHK key is used to enable/disable zero check.
2.Enable or disable guard as needed. See “Guarding” at the end of this procedure.
NOTE
NOTE
WARNING
With guard enabled (ON), the “Grd” message is displayed. However, if zero correct is already enabled (“ZCor” displayed), then “Grd” will not be displayed.
3.To achieve optimum accuracy for low voltage measurements, zero correct the
Model 6517A. To do this, use the RANGE key to select the lowest measurement
range (2V) and press REL. With zero correct enabled, the REL indicator is on.
With zero correct enabled, the “ZCor” message is displayed. However, if guard
is already enabled (“Grd” displayed), then “ZCor” will not be displayed.
4.Select a measurement range or use autoranging.
a.To automatically select the most sensitive range, enable autorange. The AUTO
key enables and disables autorange. When enabled, the AUTO annunciator is
on.
b.For manual ranging, use the RANGE and keys to select a measurement
range consistent with the expected voltage.
5.Connect the test cable(s) to the voltage to be measured. Figure 1-3A shows connections for unguarded measurements, and Figure 1-3B shows connections for
guarded measurements.
Hazardous voltage may be present on the inner shield of the triax cable
when GUARD is on. A safety shield connected to safety earth ground
(as shown in Figure 1-3B) should be used for voltage measurements at
or above 30V.
CAUTION
6.Press Z-CHK to disable zero check and take a reading from the display.
Do not apply more than 250V peak (DC to 60Hz) to the input or
instrument damage may occur.
Model 6517A Getting Started ManualFront Panel Operation1-11
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL O
R
5
W
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FU
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FU
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY
G
Figure 1-3
Voltage measurements
A. Unguarded (GUARD off)
6517A
237-ALG-2
Cable
Red (HI)
Black
Green
LO
!
INPUT
250V PEAK
237-ALG-2
Cable
6517A
!
INPUT
250V PEAK
COMMON
COMMON
LINE
90-13180-2
50, 60,
INOUT
TRIGGER
LINK
IN
Measured
Voltage
Shield (Optional)
Measured
Voltage
Red (HI)
+
Vs
-
Black (LO)
+
Vs
-
55VA
TRI
LI
Safety
Earth
Ground
Guard
Safety
Shield
1-12Front Panel OperationModel 6517A Getting Started Manual
Guarding
Guarding should be used for high impedance (≥109Ω
age measurements that use long input cables. In a high impedance circuit, guarding greatly
reduces leakage currents. When using long input cables, guarding cancels the effects of
cable capacitance that can significantly slow down the measurement response time.
When GUARD is enabled, the INPUT triax connector is reconfigured to apply the guard
potential to the inner shell of the INPUT triax connector. With this configuration, the
COMMON banana jack is used for input low. Figure 1-3 shows both the guarded and
unguarded configuration of the INPUT connector.
Perform the following steps to enable or disable guard:
1.Press CONFIG and then V to display the volts configuration menu.
2.Use the and keys to place the cursor (blinking menu item) on GUARD and
press ENTER.
3.Place the cursor on the desired selection (OFF to disable or ON to enable) and
press ENTER.
4.Use the EXIT key to back out of the menu.
Current measurements
Assuming “BENCH” reset conditions, the basic procedure is as follows:
1.With zero check enabled (“ZeroCheck” displayed), select the amps function by
pressing I. The Z-CHK key is used to enable/disable zero check.
2.To achieve optimum accuracy for low current measurements, zero correct the
Model 6517A. To do this, use the RANGE key to select the lowest measurement
range (20pA) and press REL. With zero correct enabled, the REL indicator is on,
and the message “ZCor” is displayed.
3.Select a measurement range or use autoranging:
a.To automatically select the most sensitive range, enable autorange. The AUTO
key enables and disables autorange. When enabled, the AUTO annunciator is
on.
b.For manual ranging, use the RANGE and keys to select a measurement
range consistent with the expected current.
) voltage measurements and for volt-
Model 6517A Getting Started ManualFront Panel Operation1-13
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE A
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE A
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNE
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNE
0
5
4.Connect the instrument to the current to be measured as shown in Figure 1-4.
CAUTION
Do not apply more than 250V peak (DC to 60Hz; 10 seconds per
minute maximum on mA ranges), or instrument damage may occur.
5.Press Z-CHK to disable zero check and take a reading from the display.
NOTE
To disable zero correct, enable zero check and then press REL.
Figure 1-4
Current measurements
6517A
237-ALG-2
Input low
to shield
Cable
!
INPUT
250V PEAK
COMMON
Measured
Current
Shield
(Recommended
below 1µA)
Red (HI)
I
s
Black (LO)
connected
CAUTION: Maximum Input = 250V peak (DC to
60Hz) ; 10s per minute maximum on
mA ranges.
INOUT
TRIGGER
LINK
LIN
918
50,
5
1-14Front Panel OperationModel 6517A Getting Started Manual
Resistance measurements
NOTE
The following procedure requires “BENCH” reset conditions. See “Bench defaults” to
reset the instrument.
NOTE
WARNING
Accurate high resistance measurements require the use of a low-leakage test fixture, such as the Model 8002A.
1.With zero check enabled (“ZeroCheck” displayed), select the ohms function by
pressing R.
2.Select Auto V-Source ohms. In this mode, the V-Source is automatically set to a
voltage (nominally 40V or 400V) that optimizes measurement accuracy. See “Auto
V-Source” to select Auto V-Source ohms.
“BENCH” reset conditions selects Manual V-Source ohms. In this mode, you
must manually set the V-Source level for the measurement. See Section 2,
“Voltage Source,” for details on using the V-Source.
Selecting Auto V-Source ohms may set the V-Source to 400V.
3.Select a measurement range or use autoranging:
a.To automatically select the most sensitive range, enable autorange. The AUTO
key enables and disables autorange. When enabled, the AUTO annunciator is
on.
b.For manual ranging, use the RANGE and keys to select a measurement
range consistent with the expected resistance.
4.Connect the Model 6517A to the test fixture. Generic connections are shown in
Figure 1-5A. Note that this connection scheme requires that ammeter LO be internally connected to V-Source LO. See “Configuring V-Source” in Section 2 to control this internal LO-to-LO connection. If using the Model 8002A test fixture, refer
to Figure 1-5B.
NOTE
WARNING
For optimum accuracy, leakage currents in the test fixture can be cancelled by
performing REL on the current component of the measurement. To cancel leakage current, perform the procedure in “Amps Rel”.
5.Disable zero check by pressing Z-CHK and press OPER to source voltage to the
test fixture DUT.
6.Take a reading from the display.
7.Place the V-Source in standby when finished by again pressing OPER.
Place the V-Source in standby before making or breaking connections
to the test fixture or DUT.
Model 6517A Getting Started ManualFront Panel Operation1-15
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PER
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
N
Figure 1-5
Resistance measurements
A. Generic connections
6517A
237-ALG-2
Cable
Measured
Resistance
R
X
Red
Black
LO connected
to shield
Shield
B. Connections using 8002A test fixture
8002-ILC-3 Interlock Cable
8002A HIGH RESISTANCE TEST FIXTURE
7078-TRX-3 Triax Cable
!
INPUT
250V PEAK
250V PEAK
COMMON
PREAMP OUT
Note: V-Source low internally
connected to electrometer low.
COMMON
PREAMP OUT
!
250V PEAK
INPUT
250V PEAK
LOHI
LOHI
V SOURCE
INOUT
TRIGGER
V SOURCE
OUT
!
INTERLOCK
LINK
LINE RATING
90-134VAC
180-250VAC
50, 60, 400HZ
55VA MAX
(CHANGE
WITH FRO
IE
8607 Banana Plug Cables
Warning: Connect of fixture to safety earth
ground using safety ground wire
(supplied with 8002A test fixture).
Model 6517A
Note: Set fixture mode switch to
picoammeter operation.
1-16Front Panel OperationModel 6517A Getting Started Manual
Auto V-Source
Auto V-Source should be used to achieve optimum accuracy for ohms measurements. With
Auto V-Source selected, the V-Source is automatically set for either 40V or 400V. For the
2MΩ through 200GΩ ranges, the V-Source is set to 40V. For the 2TΩ through 200TΩ
ranges, a 400V test voltage is used. With Manual V-Source selected, you can manually set
the voltage level of the V-Source.
Perform the following steps to select the V-Source mode for the ohms function:
1.Press CONFIG and then R to display the ohms configuration menu.
2.Use the
press ENTER.
3.Place the cursor on AUTO (Auto V-Source ohms) or on MANUAL (Manual
V-Source ohms) and press ENTER.
4.Use the EXIT key to back out of the menu.
and keys to place the cursor (blinking menu item) on VSOURCE and
Amps Rel
Amps Rel is used to cancel leakage current in a test fixture for ohms measurements. Perform the following steps:
NOTEThis procedure assumes that steps 1 through 4 of the Resistance Measurement
procedure have been performed.
1.With the V-Source in standby, remove the DUT from the test fixture.
2.Select the amps (I) function and disable zero check. Make sure REL is disabled.
3.Place the V-Source in operate by pressing OPER. The VOLTAGE SOURCE
OPERATE indicator is on when in operate.
4.Select the lowest possible measurement range to display the leakage current in the
test fixture.
5.Enable relative (REL annunciator on) by pressing REL. This zeroes the display,
cancelling the leakage current reading.
6.Press OPER to place the V-Source in standby and enable zero check.
7.Perform the following steps to establish the amps Rel value for the ohms function.
a.Press CONFIG and then R to display the ohms configuration menu.
b.Use the and keys, place the cursor (blinking menu item) on AMPSREL
and press ENTER.
c.Place the cursor on YES and press ENTER to use the amps Rel value for the
ohms measurement.
d.Use the EXIT key to back out of the menu.
8.Re-install the DUT in the test fixture.
9.Select the ohms function (R) and proceed to step 5 of the Resistance Measurement
procedure.
Model 6517A Getting Started ManualFront Panel Operation1-17
Resistivity measurements
NOTEThe following procedure to measure resistivity (surface or volume) requires the
use of the Keithley Model 8009 Resistivity Test Fixture. Refer to the Model 8009
Instruction Manual for details on using the test fixture.
The following procedure requires “BENCH” reset conditions. See “Bench defaults” to
reset the instrument.
1.With zero check enabled (“ZeroCheck” displayed), select the ohms function by
pressing R.
2.Select Auto V-Source ohms. In this mode, the V-Source is automatically set to a
voltage (nominally 40V or 400V) that optimizes measurement accuracy. See “Auto
V-Source” located under “Resistance Measurements” to select Auto V-Source
ohms.
NOTE“BENCH” reset conditions selects Manual V-Source ohms. In this mode, you
must manually set the V-Source level for the measurement. See “Voltage Source”
for details on using the V-Source.
WARNINGSelecting Auto V-Source ohms may set the V-Source to 400V.
3.Select a measurement range or use autoranging:
a.To automatically select the most sensitive range, enable autorange. The AUTO
key enables and disables autorange. When enabled, the AUTO annunciator is
on.
b.For manual ranging, use the RANGE
range consistent with the expected resistance.
4.Connect the Model 6517A to the Model 8009 test fixture as shown in Figure 1-6,
and set the switch on the test fixture to the desired measurement type (Surface or
Volume).
5.Select the resistivity measurement mode as follows:
a.Press the CONFIG and then R to display the ohms configuration menu.
b.Use the and keys to place the cursor (blinking menu item) on MEAS-
TYPE and press ENTER.
c.Place the cursor on RESISTIVITY and press ENTER.
NOTEThe Model 6517A senses the switch position (surface or volume) on the Model
8009 through the interlock cable, and automatically configures the instrument
for that measurement type.
and keys to select a measurement
1-18Front Panel OperationModel 6517A Getting Started Manual
d.Cursor position (SURFACE or VOLUME menu item blinking) indicates the
selected measurement type:
•SURFACE — If Surface is the selected measurement type, you do not
have to proceed any further into the menu structure. Use the EXIT key to
exit from the menu.
•VOLUME — If Volume is the selected measurement type, proceed as follows to specify the thickness of the sample:
(1)With the cursor on VOLUME, press ENTER to display the parameters
menu for volume.
(2)Place the cursor on THICKNESS and press ENTER. The present thick-
ness parameter for the sample will be displayed.
(3)Use the cursor keys (
and ) and the RANGE and keys to specify
the thickness (in millimeters) of the sample, and then press ENTER.
(4)Use the EXIT key to back out of the menu structure.
6.Disable zero check by pressing Z-CHK.
7.Press OPER to source voltage to the DUT and, after an appropriate electrification
time, take a reading from the display. Typically, an electrification time of 60 seconds is used.
8.Place the V-Source in standby when finished by again pressing OPER.
WARNINGPlace the V-Source in standby before making or breaking connections
to the test fixture or DUT.
Model 6517A Getting Started ManualFront Panel Operation1-19
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
Figure 1-6
Resistivity measurements
Model 8009
!
METERSOURCE
TRIAX
250 MAX
HI-LO
!
INPUT
250V PEAK
LID
MAX INPUT
1100V
INTERLOCK
Warning: Connect of fixture to
6517-ILC-3 Interlock Cable
8607 Banana Plug Cable
8607 Banana Plug Cable
7078-TRX-3 Triax Cable
LOHI
COMMON
PREAMP OUT
250V PEAK
safety earth ground using
safety ground wire.
V SOURCE
!
INTERLOCK
OUT
LINE RATING
90-134VAC180-250VAC
50, 60, 400HZ
55VA MAX
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
IEEE-488
LINE FUSE
SLOWBLOW
1/2A, 250V
Model 6517A
1-20Front Panel OperationModel 6517A Getting Started Manual
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE A
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE A
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNE
0
0
5
Charge measurements
Assuming “BENCH” reset conditions, the basic procedure is as follows:
1.With zero check enabled (“ZeroCheck” displayed), select the coulombs function
by pressing Q.
2.Select a measurement range or use autoranging:
a.To automatically select the most sensitive range, enable autorange. The AUTO
key enables and disables autorange. When enabled, the AUTO annunciator is
on.
b.For manual ranging, use the RANGE
range consistent with the expected charge reading.
3.Connect the test cable (see Figure 1-7) to the input of the Model 6517A and, with
the input open, disable zero check. If needed, press REL to zero the display.
4.Connect the instrument to the charge to be measured as shown in Figure 1-7.
CAUTIONDo not apply more than 250V peak (DC to 60Hz) or instrument dam-
age may occur.
5.Take a reading from the display.
and keys to select a measurement
NOTEThe reading can be reset to zero by enabling zero check. If you wish to have the
reading reset to zero when a specified charge level is reached, enable Auto Discharge as explained in the following paragraph.
Figure 1-7
Charge measurements
6517A
237-ALG-2
Cable
Black (LO)
Input low connected
to shield
!
INPUT
250V PEAK
COMMON
INOUT
TRIGGER
LINK
Measured
Charge
Shield (Optional)
Q
Red (HI)
s
LIN
91850,
5
Model 6517A Getting Started ManualFront Panel Operation1-21
Auto discharge
When enabled, Auto Discharge is used to automatically reset the charge reading to zero
when the specified charge level is reached. After the integrator resets, the charge measurement process simply restarts at zero. Perform the following steps to enable or disable Auto
Discharge.
1.Press the CONFIG and then Q to display the coulombs configuration menu.
2.Use the
DISCHARGE and press ENTER.
3.Perform step a to enable Auto Discharge or perform step b to disable it:
a.Enable Auto Discharge — Place the cursor on ON and press ENTER to dis-
b.Disable Auto Discharge — Place the cursor on OFF and press ENTER.
4.Use the EXIT key to exit from the menu.
and keys to place the cursor (blinking menu item) on AUTO-
play the present discharge level. Use the and keys, and the RANGE and
keys to set a different discharge level and press ENTER.
1-22Front Panel OperationModel 6517A Getting Started Manual
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
External temperature and relative humidity
measurements
The Model 6517A can make external temperature measurements from -25°C to 150°C
using the Model 6517-TP type K thermocouple (which is a supplied accessory).
The Model 6517A can make relative humidity measurements (0 to 100%) using the Model
6517-RH humidity probe (which is available as an option).
Connections
The Models 6517-TP (thermocouple) and 6517-RH (humidity probe) connect to the rear
panel connectors labeled “TEMP TYPE K” and “HUMIDITY” as shown in Figure 1-8.
NOTEIt is recommended that the thermocouple junction of the Model 6517-TP be
electrically insulated from ground and voltage potentials. Erroneous reading
will result if the thermocouple comes in contact with ground or a voltage
potential.
Figure 1-8
External temperature and humidity
6517A
Model 6517-TP
Thermocouple
LO
!
INPUT
250V PEAK
250V PEAK
COMMON
PREAMP OUT
V SOURCE
Extension Cable (P/N CA-129-1)
Model 6517-RH
Humidity Probe
LINE RATING
90-134VAC180-250VAC
50, 60, 400HZ
55VA MAX
Model 6517A Getting Started ManualFront Panel Operation1-23
Measurement control
BENCH reset disables temperature and humidity measurements. These measurements can
be enabled from the front panel as follows:
1.Press MENU to display the main menu.
2.Use the
press ENTER to display the menu items of the general menu.
3.Place the cursor on A/D-CONTROLS and press ENTER to display the A/D controls menu.
4.Place the cursor on DATA-STAMP and press ENTER. The present control state for
temperature and humidity will be displayed. OFF indicates that the measurement is
disabled, while ON indicates that the measurement is enabled.
5.To change the control state for temperature and/or humidity, place the cursor on the
appropriate menu item and use the RANGE and keys to toggle the control
state. With the desired states for temperature and humidity displayed (ON or OFF),
press ENTER.
6.Use the EXIT key to back out of the menu.
NOTEThe TEMPERATURE option also controls the temperature reading for the
and keys to place the cursor (blinking menu item) on GENERAL and
“Change From Cal Temp” multiple display. See Section 2, “Multiple Displays.”
Temperature units
All temperature readings by the Model 6517A can be displayed in °C, °F, or K. BENCH
reset selects °C measurement units. Perform the following steps to change units:
1.Press MENU to display the main menu.
2.Use the and keys to place the cursor (blinking menu item) on GENERAL and
press ENTER to display the menu items of the general menu.
3.Place the cursor on DISPLAY and press ENTER to display the SET READING
DISPLAY menu.
4.Place the cursor on TEMP-UNITS and press ENTER. The blinking cursor indicates the present temperature units selection.
5.To change temperature units, place the cursor on the desired selection (°C, K, or
°F) and press ENTER.
6.Use the EXIT key to back out of the menu.
1-24Front Panel OperationModel 6517A Getting Started Manual
Display reading options
Temperature and humidity readings are available as multiple (NEXT) displays. Using
multiple displays, temperature and humidity readings can accompany each normal A/D
measurement, and they can be included as data storage elements for each reading stored in
the buffer. See Section 2, “Multiple Displays.”
External temperature and humidity are selected as data store elements from the data store
configuration menu. See Section 2, “Buffer (Data Store).”
2
Measurement Options
2-2Measurement OptionsModel 6517A Getting Started Manual
This section describes the details of making measurements. Configuration options, triggers, reading storage, and scanning are just a few of the topics discussed. You will find this
information useful whether operating the Model 6517A from the front panel or IEEE-488
bus.
Multiple displays
Each measurement function and some operations provide “multiple displays” by using the
bottom line of the front panel. These multiple displays provide multiple type measurements, show a reading in a different form, or give additional information about the
reading.
Multiple displays are summarized in this section. All the multiple displays are shown in
Table 2-1.
The NEXT and PREV (previous) DISPLAY keys scroll through the multiple displays for
the selected function or operation. The multiple display mode can be cancelled by pressing
and holding in either key.
Table 2-1
Multiple displays by function
FunctionNext display
AllTime, day, and date
Bar graph
Zero-centered bar graph
Maximum and minimum values
Relative and actual values
Calculated and actual values
Limits bar graph
Relative humidity and external temperature
Change from calibration temperature
Ohms (R)Source (V) and measure (I) values
BufferRelative humidity and external temperature,
V-Source value, maximum reading, minimum
reading, average reading, standard deviation,
and print buffer data
Model 6517A Getting Started ManualMeasurement Options2-3
FILT4WARM
6517 ELECTROMETER/HIGH RESISTANCE METER
FILT4WARM
6517 ELECTROMETER/HIGH RESISTANCE METER
FILT4WARM
6517 ELECTROMETER/HIGH RESISTANCE METER
FILT4WARM
6517 ELECTROMETER/HIGH RESISTANCE METER
Time, Day, and Date — This display provides the
time, day of week, and the date. The time, date and
format (12-hour or 24-hour) are set from the CLOCK
option of the GENERAL MENU (see main Menu).
Bar Graph — The bar graph is a graphical representation of the reading with zero at the left end. Each
full segment of the bar represents approximately 4%
of the range limit.
Zero-centered Bar Graph — The zero-centered bar
graph is a graphical representation of the reading
using plus/minus limits with zero in the center. Each
full segment represents 10% of the limit.
Maximum and Minimum — This display shows the
maximum and minimum readings that have occurred
since the display was entered. Maximum and minimum values are reset by pressing the present function
key or by leaving the display.
FILTARMREL
6517 ELECTROMETER/HIGH RESISTANCE METER
6517 ELECTROMETER/HIGH RESISTANCE METER
Relative and Actual — This display is used with the
rel (relative) feature. While the top line shows the
result of the rel operation, the bottom line shows the
actual (raw) reading.
Calculated and Actual — This display is used with a
math calculation. While the top line provides the
result of the math calculation, the bottom line provides the raw reading.
2-4Measurement OptionsModel 6517A Getting Started Manual
FILT4WARM
6517 ELECTROMETER/HIGH RESISTANCE METER
FILT4WARM
6517 ELECTROMETER/HIGH RESISTANCE METER
FILT4WARM
6517 ELECTROMETER/HIGH RESISTANCE METER
Limits — This display provides the result of the limit
test. The graphical representation of the reading is
shown on a zero-centered bar graph. If the reading is
between the specified high and low limits, the PASS
message is displayed. If the reading is outside of the
limits, the FAIL message is displayed. Limits are set
and enabled from the LIMITS option of the Main
Menu.
Relative humidity and external temperature —
This display is used to display the relative humidity
and external temperature readings. Note that the
appropriate option has to be connected and enabled as
explained in Section 1 of this manual.
Change from cal temp — With temperature readings
enabled, this display indicates the difference between
the present internal temperature and the internal temperature when the instrument was last calibrated. See
Section 1, “External Temperature Measurements,” to
enable temperature readings.
FILT4WARM
6517 ELECTROMETER/HIGH RESISTANCE METER
FILT4WARM
6517 ELECTROMETER/HIGH RESISTANCE METER
FILT4WARM
6517 ELECTROMETER/HIGH RESISTANCE METER
Measure/source — This display is used to display the
measured current and the V-Source level for ohms
measurements.
Buffer — When in RECALL, there are seven displays
for buffer readings:
Relative humidity (RH) and external temperature (ET)
V-Source value
Maximum reading (shown at left)
Minimum reading
Average reading (shown at left)
Standard deviation
Print buffer data
Model 6517A Getting Started ManualMeasurement Options2-5
Menus
There are two basic menu structures used by the Model 6517A: the main menu and the
CONFIGure menus. The main menu accesses items for which there are no dedicated keys;
the CONFIGure menus configure measurement functions and other instrument operations.
Table 2-2 summarizes main menu selections. Table 2-3 and Table 2-4 show configuration
settings for the measurement functions and instrument operations.
Table 2-2
Summary of main menu
OptionDescription
SAVESETUPSave and restore setups stored in memory, set power-
on defaults, and return unit to default conditions.
COMMUNICATIONSelect and configure interface (GPIB or RS-232).
CALCalibrate the Model 6517A (see Calibration Manual),
perform offset adjustments and check calibration date.
TESTPerform self-tests (see Repair Manual).
LIMITSConfigure unit to perform limit tests.
STATUS-MSGEnable/disable status message mode.
GENERALControl output lines of digital output port, check serial
number of unit and firmware revision levels, control
line-sync, limit control and data stamp, configure
timestamp, set reading display and set real-time clock.
2-6Measurement OptionsModel 6517A Getting Started Manual
Table 2-3
Configuration settings for each measurement function
Reso-
FunctionSpeed Filter
lution
Autorange
limitsDamping Guard
External
feedback
Amps
rel
Meas
type*V-Source**
Auto
discharge
Volts
Amps
Ohms
Coulombs
**Resistance or resistivity.
**Auto or manual.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Table 2-4
Configuration settings for instrument operations
OptionDescription
CONFIG REL
CONFIG FILTER
CONFIG MATH
Set rel (relative) value and enable.
Select and configure averaging and median filters.
Select and configure math calculation: polynomial, percent, percent
deviation, ratio or log10.
CONFIG TRIG
CONFIG SEQ
CONFIG STORE
Select and configure basic or advanced trigger model.
Select and configure test sequence.
Configure data store: set count, control, timestamp, elements and
display, and clear buffer.
CONFIG VOLTAGE SOURCE*
Configure V-Source: range, V-limit, resistive I-limit and meter
connect.
CONFIG CARD
CONFIG NEXT
Select and configure internal or external scanning.
Change the scale for the zero-center bar graph.
••
•• •
•
*To access the V-Source menu, press CONFIG and then any one of the VOLTAGE SOURCE keys: OPER, or .
Navigating menus
Use the following rules to navigate through the menu structures. Table 2-5 summarizes the
front panel keys used for navigation.
1.From the instrument’s normal state of displaying readings, you can:
•View a configuration menu by pressing CONFIG and then the desired function
or operation key (V, TRIG, etc.).
•View the top level of the main menu by pressing the MENU key.
Model 6517A Getting Started ManualMeasurement Options2-7
2.The unit is returned to the normal reading display by:
•Pressing EXIT or MENU from the top level of the main menu.
•Pressing EXIT from the top level of a configuration menu.
•Pressing a measurement function key from within a menu.
3.Pressing the ENTER key selects an item and, if further definition is needed, moves
down within the menu structure. Pressing the EXIT key backs up within a menu
structure.
4.The cursor position is denoted by a blinking menu item or parameter. The cursor is
moved from one item to the next using the cursor keys ( and ). To select an
item, highlight it with the cursor, then press ENTER.
5.A displayed arrow (
and ) on the bottom line indicates there is more informa-
tion or additional menu items to select from. When “” is displayed, use the cursor key. The cursor keys have an auto-repeat feature.
6.A numeric parameter is keyed in by placing the cursor on the digit to be changed,
and pressing the RANGE or keys to increment or decrement the digit.
7.A change is only executed when the ENTER key is pressed. Entering an invalid
parameter generates an error, and the entry is ignored. Changes are also ignored if
an EXIT is performed.
8.The INFO key can be used anywhere in a menu to display helpful information mes-
sages concerning operation. To cancel an information message and remain in the
menu, press INFO a second time, EXIT, or ENTER. Pressing a function key cancels INFO and a menu, and returns the instrument to a reading display.
Table 2-5
Menu summary
ActionDescription
CONFIG-(function)
Press the CONFIG key, then a function key (e.g., V) to view the
top level of a function configuration menu.
MENU
Press the MENU key to view the top level of the main menu. The
operations that have no corresponding key are included in the
main menu.
or
Use the cursor keys to move the highlighted cursor among menu
selections, or the digits of a parameter value, or change chan-
nels on the scanner.
RANGE
RANGE
ENTER
EXIT
Use the RANGE keys to increment and decrement digits of a
parameter value.
Accepts menu selection or data entry.
Cancels changes menu selection. Also returns you to the previous
menu level.
INFO
Displays context-sensitive information about the present menu
level. Toggles information message on/off.
2-8Measurement OptionsModel 6517A Getting Started Manual
Voltage source
The built-in, bipolar, 1W voltage source can output up to ±1000V. With the instrument in
the normal measurement mode, the programmed V-Source level is shown on the bottom
line of the display.
Connections
WARNINGTo prevent electric shock that could cause injury or death, NEVER
make or break connections to the instrument (or test circuit) while the
V-Source is in operate (VOLTAGE SOURCE OPERATE indicator on).
The OPER key toggles the V-Source between standby and operate.
If used as an independent source, voltage is available at the V-SOURCE HI and LO
terminals on the rear panel (see Figure 2-1). If used as an FVMI (force voltage measure
current) source, V-Source LO can be internally connected to ammeter LO from the
METER CONNECT option of the CONFIGURE V-SOURCE menu (see “Configuring
V-Source”). Figure 2-2 shows the connections for this configuration.
Figure 2-1
Independent V-Source connections
LO
V-Source Out
R
L
A. Basic Connections
V-Source
LOHI
R
L
B. Equivalent Circuit
HI
Model 6517A Getting Started ManualMeasurement Options2-9
Figure 2-2
FVMI connections
INPUT
250V PEAK
Note: V-SOURCE LO connected to ammeter input
LO via METER-CONNECT option of
CONFIGURE V-SOURCE Menu.
Ammeter
HI
Basic operation
Basic operation simply consists of setting the V-Source level, and placing the V-Source in
operate to output the voltage. Other V-Source operations are performed from the
CONFIGURE V-SOURCE menu. See “Configuring V-Source” to select range (100V or
1000V), set voltage limit, select resistance current limit and control the LO-to-LO
connection between the V-Source and the ammeter.
LO
V SOURCE
OUT
R
V-Source
A
LO
HI
R
HI
Setting V-Source level — The V-Source level is set with the instrument in the normal
measurement mode. The VOLTAGE SOURCE and keys, and the cursor keys ( and
) are used to adjust the voltage level. Pressing any one of these four keys will enable the
V-Source edit mode. The flashing digit on the V-Source display indicates the cursor position. Use the cursor keys to place the cursor on the desired digit, and use the VOLTAGE
SOURCE and keys to adjust the level. Polarity can be changed by placing the cursor
on the polarity sign, and pressing VOLTAGE SOURCE and .
Sourcing voltage — The displayed voltage level is applied to the output terminals when
the instrument is placed in operate by pressing the OPER key. In operate, the VOLTAGE
SOURCE OPERATE indicator is on. Pressing OPER a second time places the V-Source in
standby.
2-10Measurement OptionsModel 6517A Getting Started Manual
Configuring V-Source
Perform the following steps to configure the V-Source:
1.Press the CONFIG key and one of the VOLTAGE SOURCE keys (OPER, , or )
to display the following configuration menu:
RANGE: Select the 100V range or 1000V range.
V-LIMIT: Control (on/off) and set a voltage limit (absolute value).
RESISTIVE LIMIT: Control (on/off) the resistive (1MΩ) current limit.
METER CONNECT: Control (on/off) the internal connection between V-Source
LO and ammeter LO.
2.Use the menu items to configure the V-Source. A menu item is selected by placing
the cursor (using the
item are selected in the same way. Parameter values are changed using the cursor
keys and the RANGE keys, and then pressing ENTER. See “Menus” previously in
this section if you need more information to navigate through the menu structure.
3.Use the EXIT key to back out of the menu structure.
and keys) on it and pressing ENTER. Options for a menu
Relative
Rel subtracts a reference value from actual readings. When rel is enabled, the instrument
uses the present reading as a relative value. Subsequent readings will be the difference
between the actual input value and the rel value.
Actual Input – Reference = Displayed Reading
The rel (relative) operation is enabled by pressing the REL key (REL annunciator turns
on). Pressing REL a second time disables rel. You can also enter and enable a rel value
from the CONFIG-REL display.
A rel value can be established for each measurement function. The state and value of rel
for each measurement function are saved when changing functions. Once a rel value is
established for a measurement function, the value is the same for all ranges.
Configuring rel
To check or change a rel value for a measurement function, perform the following steps:
1.Select the desired measurement function.
2.Press the CONFIG key and then the REL key to display the present rel value.
3.Use the cursor keys (
press ENTER. The instrument will return to the normal display state with rel
enabled.
and ) and the RANGE keys to change the rel value and
Model 6517A Getting Started ManualMeasurement Options2-11
Zero check
With zero check enabled (“ZeroCheck” displayed), the input signal is routed to low
through a high impedance shunt. For volts, amps, and ohms measurements, zero check
should be enabled when connecting or disconnecting input signals. For charge measurements, zero check should be disabled. If left enabled, the charge will dissipate through the
10MΩ shunt.
The Z-CHK key is used to enable and disable zero check.
NOTETo ensure proper operation, always enable zero check before changing functions
(V, I, R, or Q).
Zero correct
The Z-CHK and REL keys work together to cancel (zero correct) any internal offsets that
might upset accuracy for voltage and current measurements.
Perform the following steps to zero correct the volts or amps function:
1.Select the V or I function.
2.Enable Zero Check.
3.Select the range that will be used for the measurement, or select the lowest range.
4.Press REL to zero correct the instrument. The REL indicator turns on and the
“ZCor” message is displayed.
NOTEFor the volts function, the “ZCor” message will not be displayed if guard was
already enabled (“Grd” displayed).
5.Press Z-CHK to disable zero check.
6.Readings can now be taken in the normal manner.
NOTES The instrument will remain zeroed even if the instrument is upranged. If down-
ranged, re-zero the instrument.
To disable zero correct, first enable zero check and then press REL.
2-12Measurement OptionsModel 6517A Getting Started Manual
Triggering
The following overview is intended to acquaint you with triggering. For a complete explanation, see the Model 6517A User’s Manual. Triggering is configured from the Trigger
Configuration menu which is accessed by pressing CONFIG and then TRIG.
There are two trigger modes for the Model 6517A; basic and advanced. These two trigger
modes are summarized by the simplified trigger models shown in Figure 2-3 and
Figure 2-4. As shown in the drawings, the basic trigger model uses one layer of operation,
while the advanced trigger model uses three layers to provide more trigger options.
Figure 2-3
Basic trigger model (simplified)
Idle
MODE
One
Shot
Event
Detection
Continuous
Output Trigger
Device
Action
Model 6517A Getting Started ManualMeasurement Options2-13
Figure 2-4
Advanced trigger model (simplified)
Idle
No
Idle
Arm
Layer
Scan
Layer
Measure
Layer
Arm
Event
Scan
Event
Measure
Event
Device
Action
Yes
Yes
Yes
Another
Arm
?
No
Another
Scan
?
No
Another
Measure-
ment
?
Output
Trigger
Arm
Count
Scan
Count
Measure
Count
The instrument is in idle whenever it is not within one of the layers of the trigger model.
When the Model 6517A is taken out of idle by pressing TRIG (or sending :INIT or
:INIT:CONT ON over the bus), the ARM indicator turns on and operation proceeds in the
trigger model.
2-14Measurement OptionsModel 6517A Getting Started Manual
Control sources
With advanced triggering and basic one-shot triggering, operation is controlled by control
sources, which hold up operation until the programmed event occurs. Basic one-shot triggering uses one control source, while advanced triggering uses three control sources. The
control sources are described as follows:
•Immediate — Event detection is immediately satisfied, allowing operation to
continue.
•External — Event detection is satisfied when an input trigger via the EXT TRIG IN
connector is received.
•Manual — Event detection is satisfied by pressing the TRIG key.
•GPIB — Event detection is satisfied when a bus trigger (GET or *TRG) is
received.
•TrigLink — Event detection is satisfied when an input trigger via the TRIGGER
LINK connector is received. Not available for basic triggering.
•TIMER — Event detection is immediately satisfied on the initial pass through the
layer. Each subsequent detection is satisfied when the programmed timer interval
elapses. Not available in the Arm Layer of the advanced trigger model.
•Hold — With this selection, event detection is not satisfied by any of the above
control source events and operation is held up. Not available for basic triggering.
If continuous basic triggering is being used, then operation bypasses the control source as
shown in Figure 2-3 and performs a device action.
Device action
The primary device action is a measurement. However, the device action could include a
function change and a channel scan (if scanner is enabled). A channel is scanned (closed)
before a measurement is made. When scanning internal channels, the previous channel
opens and the next channel closes (break-before-make). Also included in the device action
is the internal settling time delay for the relay.
Output trigger
After each measurement (device action), an output trigger pulse occurs and is available at
the rear panel of the Model 6517A. When used with an external scanner (such as a
Model 7001 or 7002 Switch System), each output trigger would be used to select the next
channel in a scan (see “External Scanning” later in this section).
Counters (Advanced triggering)
All three layers of the advanced trigger model use programmable counters that allow operation to return to or stay in the respective layer. For example, programming the Measure
Layer counter to infinite keeps operation in the Measure Layer. After each device action,
Model 6517A Getting Started ManualMeasurement Options2-15
operation loops back to the Trigger Layer control source. A counter resets when operation
loops back to a higher layer (or idle).
Bench default trigger model setup
The bench default setup selects advanced triggering and takes the Model 6517A out of
idle, sets the control sources of all layers to Immediate, and sets the Measure Layer
counter to infinite. With this trigger model setup, operation simply falls into the Measure
Layer (and stays there) to make continuous measurements.
Speed
SPEED sets the integration time of the A/D converter, the period of time the input signal is
measured. The SPEED can be set for each measurement function. The integration time is
specified in parameters based on a number of power line cycles (NPLC), where one PLC
for 60Hz is 16.67msec and one PLC for 50Hz and 400Hz is 20msec.
In general, the fastest integration time (0.01 PLC) results in increased reading noise and
less usable resolution, while the slowest integration time (10 PLC) provides the best
common-mode and normal-mode rejection. In-between settings are a compromise
between speed and noise.
Configuring speed
Each measurement function can have a unique integration time. Speed is set from the configure function menu structures. The procedure is summarized as follows:
1.Press the CONFIG key and then the desired function key (V, I, etc.).
2.Using the cursor keys ( and ), select SPEED and press ENTER to display the
following speed options:
NORMAL: Sets the integration time to 1 PLC.
FAST: Sets the integration time to 0.01 PLC.
MEDIUM: Sets the integration time to 0.1 PLC.
HIACCURACY: Sets the integration time to 10 PLC.
SET-SPEED-EXACTLY: This options prompts you to enter a PLC value
(0.01 to 10).
SET-BY-RESOLUTION: Automatically optimizes the integration time for the
present resolution setting (see the User’s Manual).
3.Use the menu items to configure speed. A menu item is selected by placing the cursor (using and keys) on it and pressing ENTER. Parameter values are changed
using the cursor keys and the RANGE keys, and then pressing ENTER. See
MENUS if you need more information to navigate through the menu structure.
NOTEFor more information, see Section 2, SPEED, of the User’s Manual.
2-16Measurement OptionsModel 6517A Getting Started Manual
Resolution
All functions can operate from 3½ to 6½ digits of resolution. Each function can have a
unique resolution setting.
Configure resolution
Perform the following steps to set resolution for a measurement function:
1.Press the CONFIG key and then the desired function key (V, I, etc.).
2.Using the cursor keys (
play the following resolution options:
a.3.5 to 6.5d: Select one of these options to set the display resolution.
b.AUTO: This option automatically optimizes the resolution for the present inte-
gration time (speed) setting (see the User’s Manual).
3.Set resolution by placing the cursor (using and keys) on the menu option
pressing ENTER. See “Menus” if you need more information to navigate through
the menu structure.
and ), select RESOLUTION and press ENTER to dis-
Filter
Filtering stabilizes noisy measurements. The Model 6517A uses a digital filter and a
median filter. When a filter is enabled by pressing FILTER (FILT annunciator turns on),
the selected filter for that measurement function is in effect. Pressing FILTER a second
time disables the filter.
Filter types
The Model 6517A has two types of digital filters: averaging and advanced. Both types are
a simple average of 1 to 100 reading conversions. The difference is a user-programmed
noise “window” for the advanced filter. The noise window (expressed as a percentage of
range) allows a faster response time to large signal step changes (see Figure 2-5). See the
User’s Manual for complete information on filter types.
Model 6517A Getting Started ManualMeasurement Options2-17
Figure 2-5
Filter response/noise window
Input signal
Response with the noise
window turned “on” shifts
when the input signal moves
beyond the specified range
Response with
no noise window
Limits of the
user-specified
noise window
Filter modes
There are two filter modes: moving or repeating. The moving filter uses a first-in, first-out
stack. When the stack becomes full, the measurement conversions are averaged, yielding a
reading. For each subsequent conversion, the new conversion is placed into the stack, the
oldest conversion is discarded, and a new reading is averaged.
For the repeating filter, the stack is filled and the conversions are averaged to yield a reading. The stack is then cleared and the process starts over. See the User’s Manual for complete information on filter modes.
Median filter
Median filtering uses the “middle-most” reading from a group of sample readings
arranged in ascending order. For example, assume the following readings:
They are then arranged in ascending order as follows:
The median (“middle-most”) reading from the above sample group is 3V.
The number of sample readings is determined by the specified rank as follows:
Value displayed
with filtering
20V, 1V, 3V
1V, 3V, 20V
Sample readings = (2 × R) + 1
where: R is the selected rank (1 to 5)
For example, a rank of 4 will use the last nine readings to determine the median;
(2 × 4) + 1 = 9.
Each new reading replaces the oldest reading, and the median is then determined from the
updated sample group of readings.
2-18Measurement OptionsModel 6517A Getting Started Manual
Configuring filters
Each measurement function has its own filter configuration. Perform the following steps to
configure filter:
1.Select the measurement function.
2.Press CONFIG and then FILTER to display the following menu items:
AVERAGING:This item is used to control and configure the digital filter.
MEDIAN:This item is used to control and configure the median filter.
3.The menu structure for the two filters (Digital and median) is shown as follows:
a.AVERAGING (Digital) filter options:
TYPE — This item is used to select the digital filter type:
NONE — Disables the digital filter.
AVERAGING — Selects the averaging filter and prompts you to enter the
number of readings to average (“stack” size).
ADVANCED — Selects the advanced filter and prompts you to enter the
number of readings to average (“stack” size). After entering the stack size,
you are then prompted to enter the noise tolerance level (0 to 100%).
AVERAGING-MODE — This menu item is used to select the filter mode;
MOVING or REPEAT.
b.MEDIAN filter options:
DISABLE — Disables the median filter.
ENABLE — Enables the median filter and prompts you to enter the range (1
to 5).
4.Use the menu items to configure a filter. A menu item is selected by placing the
cursor (using
changed using the cursor keys and the RANGE keys, and then pressing ENTER.
See “Menus” if you need more information to navigate through the menu structure.
and keys) on it and pressing ENTER. Parameter values are
NOTEThe filter configuration menus can also be accessed from the configure function
menus.
Model 6517A Getting Started ManualMeasurement Options2-19
Buffer (Data Store)
The Model 6517A has a buffer that can store from one to over 15,000 readings. The actual
number of readings that can be stored in the buffer depends on how many optional data
elements are included for each reading (see Table 2-22 in the User’s manual).
The basic data elements include the reading, units, reading #, and status (overflow or
underflow). In addition to these items, recalled data also includes statistical information
such as minimum, maximum, average, and standard deviation, which are part of the
NEXT displays (see Section 1, “Multiple Displays”).
Optional data elements include timestamp, humidity, external temperature, channel number (for scanning) and the V-Source level.
Storing readings
The following procedure to store readings uses a typical data store configuration: a userdefined number of readings will be stored in the buffer (fill-and-stop). All aspects of data
store configuration and operation are detailed in Section 2 of the User’s Manual.
1.Set up the instrument for the desired measurements (function, range, etc.).
2.Configure the data store as follows. A menu item is selected by placing the cursor
(using and keys) on it and pressing ENTER. Parameters are changed using the
RANGE keys and pressing ENTER. See MENUS if you need more information on
navigating through the menu structure.
•PressCONFIG
•PressSTORE
•SelectCONTROL
•SelectFILL-AND-STOP
•SelectELEMENTS (y = enable, n = disable)
•SelectCOUNT
•SelectENTER-COUNT (enter buffer size)
Note: If you enabled the TIMESTAMP data element, continue on to configure the
timestamp. Otherwise, press EXIT to back out of the menu structure.
•SelectTIMESTAMP
•SelectTYPE
•SelectREAL-TIME
•SelectFORMAT
•SelectABSOLUTE
Use the EXIT key to back out of the menu structure.
2-20Measurement OptionsModel 6517A Getting Started Manual
3.Press STORE. The presently programmed buffer size (number of readings to store)
is displayed. If desired, use the cursor keys and the RANGE keys to change the
buffer size. (Incrementing the most significant digit sets the buffer size to
maximum.)
4.Press ENTER to start storing readings. The asterisk (*) annunciator turns on to
indicate a data storage operation.
5.To recall stored readings, press RECALL. Use the RANGE keys to scroll through
the buffer.
Math
The MATH key lets you perform math operations on single readings and display the
result. The six math calculations that are configured from the CONFIGURE MATH menu
structure are:
Polynomial:
Ya2()X2a1()Xa0()++=
where:X is the normal display reading
a2, a1, and a0 are user-entered constants
Y is the displayed result
Percent:
Input Reading
Percent
----------------------------------
=
Target Value
100
×
where:Input Reading is the normal display reading
Target Value is the user-entered constant
Percent is the displayed result
Percent Deviation:
PD
100×=
Y
XY–()
------------------
where:X is the normal display reading
Y is the user-entered reference value
PD is the displayed result (percent deviation)
Deviation:
Deviation
XY–()
------------------=
Y
where:X is the normal display reading
Y is the user-entered reference value
Deviation is the displayed result
Model 6517A Getting Started ManualMeasurement Options2-21
Ratio:
Ratio
X
---=
Y
where:X is the normal display reading
Y is the user-entered reference value
Ratio is the displayed result
Log10 (logarithmic):
log
X = Y
10
where:X is the input reading
Y is the logarithmic result
Selecting and configuring math
The procedure to select and configure a math calculation is summarized as follows:
1.Press CONFIG and then MATH to display the following math filter menu options:
NONE: Select no calculation when the MATH key is pressed.
POLYNOMIAL: Select the polynomial calculation and enter the constants (a2, a1,
and a0).
PERCENT: Select the percent calculation and enter the target value (reference).
% DEV: Select the percent deviation calculation.
DEVIATION: Select the deviation calculation.
RATIO: Select the ratio calculation.
LOG10: Select the logarithmic calculation.
2.Use the menu items to select and configure math. A menu item is selected by placing the cursor (using
and
are changed using the cursor keys and the RANGE keys, and then pressing
ENTER. See “Menus” if you need more information to navigate through the menu
structure.
keys) on it and pressing ENTER. Parameter values
2-22Measurement OptionsModel 6517A Getting Started Manual
Enabling math
The selected math calculation is enabled by simply pressing the MATH key. When
enabled, the MATH annunciator turns on and the calculation type (NONE, POLY, %, or %
DEV) is displayed. Also, one of the following messages is briefly displayed:
Math Enabled
Display = NONE (reading)
Math Enabled
Display = POLY (reading)
Math Enabled
Display = % (reading)
Math Enabled
Display = % DEV (reading)
Math Enabled
Display = DEV (reading)
Math Enabled
Display = RATIO (reading)
Math Enabled
Display = LOG10 (reading)
Math is disabled by pressing MATH a second time.
Additional math operations
In addition to the math performed on single readings described above, the Model 6517A
has these math operations:
•Math performed on buffered readings (maximum and minimum values, average,
and standard deviation).
•Math performed on single readings as part of a pass/fail limits test.
NOTE Complete information on MATH is provided in Section 2 of the User’s Manual.
Model 6517A Getting Started ManualMeasurement Options2-23
Figure 2-6
Combining math calculations
Math
Raw
Measurement
Polynomial,
Percent,
Percent Deviation,
Ratio, Logarithmic
Value Displayed
Test sequences
The following information summarizes the built-in test sequences of the Model 6517A.
Detailed information on test sequences can be found in the User’s Manual.
Selecting and configuring a test sequence
A test sequence is selected and configured from the CONFIGURE SEQUENCE menu as
follows:
1.Press CONFIG and then SEQ to display the sequence configuration menu.
2.Place the cursor (using
Select and configure a test from the test sequence menu structure. To select a menu
item, place the cursor (using
parameter value, use the cursor and RANGE keys, and press ENTER.
DEV-CHAR — Use to select a device characterization test:
RESISTIVITY — Use to select a resistivity test:
MAX, MIN
and
keys) on APPLICATIONS and press ENTER.
and
Multiple Displays
keys) on it and press ENTER. To change a
DIODE: Diode leakage current test — Specify start voltage, stop voltage, step
voltage and delay.
CAPACITOR: Capacitor leakage current test — Specify bias voltage, bias
time, and discharge time.
CABLE: Cable insulation resistance test — Specify bias voltage and bias time.
RESISTOR: Resistor voltage coefficient test — Specify source 1 voltage,
delay 1, source 2 voltage, and delay 2.
SURFACE: Surface resistivity test — Specify pre-discharge time, bias voltage, bias time, measure voltage, measure time, and discharge time.
VOLUME: Volume resistivity time — Specify pre-discharge time, bias voltage, bias time, measure voltage, measure time, and discharge time.
2-24Measurement OptionsModel 6517A Getting Started Manual
SIR — Surface insulation resistance test — Use to select the SIR test. Specify bias
voltage, bias time, measure voltage, and measure time.
SWEEP — Use to select a sweep test:
SQUARE-WAVE: Square wave sweep test — Specify high level voltage, time
at high level, low level voltage, time at low level, and cycle count.
STAIRCASE: Staircase sweep test — Specify start voltage, stop voltage, step
voltage, and step time.
3.Press EXIT to display the following menu:
CONFIGURE SEQUENCE
Applications Control
4.Place the cursor on CONTROL and press ENTER to display the control sources
that can be used to start the test. Place the cursor on the desired control source and
press ENTER.
MANUAL — Pressing the TRIG key will start the test.
IMMEDIATE — Test will start immediately after it is armed.
LID-CLOSURE — Test will start when lid of Model 8009 test fixture is closed.
GPIB — Test will start when a bus trigger (*TRG or GET) is received by the
Model 6517A.
EXTERNAL — Test will start when a trigger pulse (via EXT TRIG IN connector)
is received by the Model 6517A.
TRIGLINK — Test will start when a trigger pulse (via TRIG LINK connector) is
received by the Model 6517A. You will also be prompted to select the input line for
the trigger.
Connections
WARNING Make sure the V-Source is in standby (VOLTAGE SOURCE
OPERATE indicator off) before making or breaking connections to the
Model 6517A.
Test sequences use the force voltage measure current (FVMI) technique as shown in
Figure 2-7. This connection scheme assumes that V-Source LO is internally connected to
ammeter LO. This connection is controlled from the METER CONNECT option of the
CONFIGURE V-SOURCE menu (see V-Source). Note that Figure 2-7 does not meet the
exact connection requirements for all the tests. It is only intended to show the general concept. More specific connection diagrams are provided in the User’s Manual.
Model 6517A Getting Started ManualMeasurement Options2-25
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUA
K
Figure 2-7
Typical FVMI connections
6517A
HI
LO
Shield
DUT
Note: Ammeter LO internally connected to
V-source LO (see V-Source).
6517A
+
V-Source
-
Running a test
HI
LO
7078-TRX
Cable
Shield
DUT
!
INPUT
250V PEAK
PREAMP OUT
250V PEAK
HI
A
LO
COMMON
6517A
Ammeter
LOHI
V SOURCE
IN
TRIGG
LIN
After a test is selected, configured and connected, perform the following steps to run the
test:
NOTEAfter the test is armed, the TRIG key can be used to start the test regardless of
1.Press the SEQ key. The display message will indicate the selected test.
2.Press ENTER to arm the test. The blinking “SEQ” message will be displayed. The
test will start when the selected control source event occurs. Note that if the Immediate control source is selected, the test will start as soon as it is armed.
which control source is selected.
3.When the test is finished, the “SEQ” display message is removed and the V-Source
goes into standby.
4.Use the RECALL key to read the data from the buffer. Use the RANGE keys to
scroll through the data points.
2-26Measurement OptionsModel 6517A Getting Started Manual
Internal scanning
The Model 6517A can be used with a scanner card (such as the Model 6521 or 6522)
installed in the option slot of the instrument. This section provides basic information for
scanning internal channels. If the scanner card is not already installed, refer to the scanner
card instruction manual.
NOTES For complete information on scanning (internal and external), refer to the scan-
ner card instruction manuals.
The scanner card has to be installed in the option slot in order to access the
menus to configure and run an internal scan.
Configure internal scanner
Perform the following steps to configure an internal scan:
1.Press CONFIG and then CARD to display the scanning options (internal or
external).
2.Place the cursor (using the
play the menu items for the internal scanner.
3.Use the following menu structure to configure the internal scanner. To select a
menu item, place the cursor (using the
Parameter values are changed using the cursor keys and the RANGE keys. If you
need more information to navigate through the menu structure, see MENUS.
CHANNELS — Selecting this menu item displays the status (on or off) for each
channel. ON indicates that the channel will be included in the scan, while OFF
indicates that the channel will not be included in the scan. To change the status of a
channel(s), place the cursor on that channel and press a RANGE key. When finished, press ENTER.
SCAN-MODE — Use this menu item to set the scan mode. The VOLTAGE scan
mode is faster and can be used when break-before-make switching is not required.
VSRC-LIMIT — Use this menu item to enable (YES) or disable (NO) the 200V
V-Source limit. The ±200V limit is used to protect the scanner card. Note that a
V-Source limit (0 to ±1000V) may also be set from the Configure V-Source menu
(see V-SOURCE).
SETTLING-TIME — Use this menu item to set a settling time (0 to 999.999 seconds) for each channel. Be sure to press ENTER after changing the time period.
4.Use the EXIT key to back out of the menu structure.
and
keys) on INTERNAL and press ENTER to dis-
and
keys) on it and press ENTER.
Model 6517A Getting Started ManualMeasurement Options2-27
Perform the scan
Perform the following steps to scan internal channels. Note that menu items are selected
by placing the cursor (using
are changed using the cursor and RANGE keys and pressing ENTER. If you need more
information on navigating the menu structure, see “Menus”.
1.Set up the Model 6517A for the desired measurement (i.e., function, range, filter,
etc.).
2.Press CARD to display the internal scanner options (close channel or perform
scan).
3.Select PERFORM-SCAN to display the scan types (internal or external).
4.Select INTERNAL to display the scan count. The scan count indicates the number
of times the scan will be repeated.
5.If desired, change the scan count and press ENTER.
6.You will then be asked if you wish to use the scan timer to provide a time interval
between scans:
a.Yes — To use the timer, select YES. The present interval (in seconds) will be
displayed. If desired, change the interval. Press ENTER to continue.
b.No — If you do not wish to use the timer, select NO.
7.You will then be asked if you wish to store the readings in the buffer:
a.Yes — To use the buffer, select YES. A message indicating the number of
readings that will be stored in the buffer will be displayed. Press ENTER to
continue.
b.No — If you do not wish to use the buffer, select NO.
8.With the message “Press ENTER to begin” displayed, press ENTER to start the
scan.
9.After the scan is finished, the following options are available:
a.Recall data — If readings were stored in the buffer, select RECALL-DATA to
display the stored readings. Use the RANGE keys to scroll through the data
points.
b.Scan again — If you wish to repeat the scan(s), select SCAN-AGAIN. Press
ENTER to start the scan.
c.Exit — To return to the normal measurement mode, select EXIT. Note that
stored readings can still be displayed by pressing the RECALL key.
and
keys) on it and pressing ENTER. Parameter values
2-28Measurement OptionsModel 6517A Getting Started Manual
Close/Open channels
Perform the following steps to open or close a channel on an internal scanner card:
1.Press the CARD key to display the internal scanner options (close channel or perform scan).
2.Place the cursor (using
3.The following channel closure options are available:
a.Close channel — To close a channel, place the cursor on CLOSE-CHANNEL
and press ENTER. Use the RANGE keys to display the channel that you wish
to close and press ENTER. The number of the closed channel will be displayed along with the reading.
b.Open channels — To open all channels on the scanner card, place the cursor
on OPEN-ALL-CHANNELS and press ENTER.
and
) on CHANNEL-CLOSURES and press ENTER.
External scanning
The Model 6517A can be used with a scanner card (such as the Model 7158 Low Current
Multiplexer Card) installed in an external scanning mainframe (Model 706, 7001, or 7002
Switch System). With the use of external triggering, the Model 6517A can measure and
store each scanned channel.
NOTES
For complete information on scanning (external and internal), refer to Section 2
in the User’s Manual, and the switch system and scanner card instruction
manual.
The following steps assume that the Model 6517A is set to the BENCH reset
default conditions (see Section 2, “Bench Default”) and the Model 7001/7002 is
set to the RESET default conditions.
Trigger connections
If using Trigger Link, connect the Model 6517A to the switch system as shown in
Figure 2-8. If using conventional external triggering, connect the instruments as shown in
Figure 2-9. Detailed information on triggers is provided in Section 2 of the User’s Manual.
Model 6517A Getting Started ManualMeasurement Options2-29
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
Figure 2-8
Trigger connections using trigger link
7001 or 7002 Switch System
!
MADE IN USA
IN
OUT
6517A Multimeter
COMMON
PREAMP OUT
250V PEAK
INPUT
250V PEAK
LOHI
IN OUT
V SOURCE
!
INTERLOCK
Trigger
Link
Trigger Link Cable (8501)
Figure 2-9
Trigger connections using conventional external triggering
External
7001 or 7002 Switch System
MADE IN USA
Channel
Ready
7051-2
BNC to BNC
Cables (2)
Trigger
External
Trigger Input
6517A Multimeter
COMMON
PREAMP OUT
!
250V PEAK
INPUT
250V PEAK
LINE RATING
90-134VAC
180-250VAC
50, 60, 400HZ
OUT
Trigger
Link
LOHI
V SOURCE
!
INTERLOCK
LINE FUSE
SLOWBLOW
1/2A, 250V
55VA MAX
IEEE-488
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
LINE RATING
90-134VAC
180-250VAC
50, 60, 400HZ
55VA MAX
OUT
Meter
Complete
Output
IEEE-488
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
LINE FUSE
SLOWBLOW
1/2A, 250V
Configure external channels
The scanner configuration menu is used to specify the number of channels (external
inputs) for the scan. If a scanner card is installed in the option slot of the Model 6517A,
use procedure A. If the option slot is empty, use procedure B.
Procedure A — Scanner installed in option slot of Model 6517A.
1.Press CONFIG and then CARD to display the scanner configuration menu.
2.Place the cursor (using and keys) on EXTERNAL and press ENTER.
3.You will then be prompted to enter the number of external inputs (channels) for the
scan. Use the cursor keys and RANGE keys to change the number (1 to 400). Press
ENTER to continue.
4.Press EXIT to return to the normal measurement display.
2-30Measurement OptionsModel 6517A Getting Started Manual
Procedure B — Option slot of Model 6517A empty.
1.Press CONFIG and then CARD to display the scanner configuration menu.
2.You will then be prompted to enter the number of external inputs (channels) for the
scan. Use the cursor keys ( and ) and RANGE keys to change the number (1 to
400).
3.Press ENTER to return to the normal measurement display.
Perform the scan
Perform the following steps to scan external channels. Note that menu items are selected
by placing the cursor (using and keys) on it and pressing ENTER. A parameter value
is changed by using the RANGE keys and pressing ENTER.
1.Model 6517A — Press the CARD key. If a scanner card is installed in the option
slot of the Model 6517A, perform steps a and b. If the option slot is empty, proceed
to step 2.
a.Place the cursor on PERFORM-SCAN and press ENTER to display the scan
types (external or internal).
b.Place the cursor on EXTERNAL and press ENTER.
2.Switch System — If not already done, reset the Model 7001/2 as follows:
•PressMENU
•SelectSAVESETUP
•SelectRESET
•SelectENTER
•SelectENTER
Use the EXIT key to back out of the menu structure.
3.Model 6517A – Press ENTER to display the next message; “CONFIG EXT
SCANNER; Set CHAN COUNT to infinite”.
4.Switch System – Set the channel count to infinite as follows:
•PressSCAN
•SelectSELECT-CONTROL
•SelectNUMBER-OF-CHANS
•SelectCHAN-COUNT
•SelectINFINITE
Note: Do not exit from the menu structure after selecting an infinite channel count.
5.Model 6517A – Press ENTER to display the next message (“SELECT TRIG
SOURCE”), and select the appropriate trigger source. If using the Trigger Link,
select TRIGLINK. If you are instead using conventional external triggering, select
EXTERNAL. The “CONFIG EXT SCANNER” message to set channel spacing for
the Switch System will then be displayed.
Model 6517A Getting Started ManualMeasurement Options2-31
6.Switch System – Set channel spacing as follows. Note that the message on the
Model 6517A tells you which channel spacing option to select.
•SelectCHANNEL-SPACING
•SelectTRIGLINK or EXTERNAL
Use the EXIT key to back out of the menu structure.
7.Model 6517A – Press ENTER. The display will prompt you to define the scan list
for the Switch System.
8.Switch System – Define the scan list.
9.Model 6517A – Press ENTER to display “CONFIG EXT SCANNER; STEP scanner to first channel”.
10.Switch System – Press STEP to close the first channel in the scan.
11.Model 6517A – Press ENTER to display the currently programmed scan count.
The scan count specifies the number of scans to be performed. To change the scan
count, use the cursor keys ( and ) and RANGE keys ( and ). Press ENTER
to continue.
12.Model 6517A – You will then be asked if you wish to use the scan timer. The timer
is used to provide a time interval between each scan. If you select YES, enter the
interval (in seconds).
13.Model 6517A – You will then be asked if you wish to store the readings in the
buffer. If you select YES, a message indicating the total number of readings to be
stored in the buffer will be displayed. Press ENTER to continue.
14.Model 6517A – With the message “Press ENTER to begin” displayed, press
ENTER to start the scan process.
15.After the scan is completed, options to recall readings or repeat the scan will be
displayed:
•RECALL-DATA – Select this option to recall readings. Use the cursor keys
and the range keys to scroll through the buffer. When finished, press EXIT to
return to the post-scan options.
•SCAN-AGAIN – Use this option to repeat the scan.
•EXIT – Use this option to disable the scan.
3
Remote Operation
3-2Remote OperationModel 6517A Getting Started Manual
Overview
For remote operation, the Model 6517A can use the IEEE-488 interface or the RS-232
interface. Common commands and SCPI commands can be used with either interface.
For IEEE-488 operation, you can select the DDC language mode. In this mode, you use
device-dependent commands (DDCs) instead of command commands and SCPI commands. This mode allows you to use the Model 6517A as a “drop-in” replacement for the
Model 617 Electrometer. Existing programs written for the Model 617 can be used by the
Model 6517A without having to make any code modifications. Appendix G of the User’s
Manual lists the DDCs for the Model 6517A.
Software support
The following software tools are included with the Model 6517A:
TestPoint application software
There are two run-time TestPoint applications on the supplied disk. One of the applications utilizes an optional scanner card and the other is a complex interactive application.
Among the many operations, the interactive application allows you to select function and
range, make measurements, store readings in the buffer, graph the results, and/or export
the data to a Microsoft Windows Excel file. These run-time applications are compatible
with any PC using Windows 3.0 or higher, and require the use of a Keithley KPC-488
series interface card. A TestPoint library for the Model 6517A is included, so that these
applications can be readily customized using TestPoint.
Demonstration/Startup programs
Five QuickBASIC example programs are included on the TestPoint disk to familiarize you
with the use of SCPI commands.
LabView driver
This driver allows you to use the Model 6517A with the National Instruments LabView
package and is free upon request. Contact the Keithley Applications group for details
(1-800-348-3735).
Model 6517A Getting Started ManualRemote Operation3-3
IEEE-488 bus standards
For remote operation, the Model 6517A can use the IEEE-488 bus for communication
between instrumentation and the controller (computer). The IEEE-488 bus is also known
as the GPIB (General Purpose Interface Bus).
In addition to conforming to the IEEE-488-1978 and IEEE-488.1-1987 standards, the
Model 6517A also conforms to the IEEE-488.2-1987 standard and the SCPI 1994
(Standard Commands for Programmable Instruments) standard. These two standards
allow most instrument operations to be performed with the use of command commands
and SCPI commands.
RS-232 standard
For remote operation, the Model 6517A can use the RS-232 serial port for communication
between instrumentation and the controller (computer). All commands, except DDCs, can
be used over this serial port. The serial port is based on the electrical and mechanical characteristics of the RS-232-C standard.
IEEE-488 bus connections
The Model 6517A is connected to the IEEE-488 bus using a cable terminated with standard IEEE-488 connectors. Figure 3-1 shows a typical connection scheme for a multi-unit
test system. Note that connectors can be stacked to accommodate the parallel connection
scheme.
To minimize interference caused by electromagnetic radiation, only use shielded
IEEE-488 cables, such as the Keithley Models 7007-1 and 7007-2.
Figure 3-1
IEEE-488 connections
Instrument
InstrumentInstrument
Controller
3-4Remote OperationModel 6517A Getting Started Manual
RS-232 connections
The RS-232 serial port of the Model 6517A can be connected to the serial port of a computer using a standard, straight-through (not null modem) RS-232 cable terminated with
DB-9 connectors. The serial port is located on the rear panel of the Model 6517A and is
labeled “RS232”.
If your computer uses a DB-25 connector for the RS-232 interface, you will need a cable
or an adapter with a DB-25 connector on one end and a DB-9 connector on the other end.
Again, make sure it is wired straight-through (not null modem).
IEEE-488 interface, address and language selection
The Model 6517A is shipped from the factory with the IEEE-488 bus selected, the primary address set to 27 and the SCPI language mode selected. The primary address is displayed on power-up if the IEEE-488 bus is the selected interface. Note that the IEEE-488
bus is also known as the GPIB (General Purpose Interface Bus).
Perform the following steps to select the IEEE-488 bus interface, check and/or change the
primary address, and check and/or change the language mode:
1.Press MENU to display the MAIN MENU.
2.Place the cursor (using and keys) on COMMUNICATION and press ENTER.
The interface options (GPIB and RS-232) will then be displayed.
3.Place the cursor on GPIB and press ENTER to select the IEEE-488 bus interface.
NOTEIf the RS-232 interface was previously selected, the unit will exit from the MAIN
MENU when you select GPIB. In that event, repeat steps 1, 2, and 3 to continue
in the menu structure.
4.Perform the following steps if you wish to check and/or change the primary
address:
a.Place the cursor on ADDRESSABLE and press ENTER to display the
addressable menu items (ADDRESS and LANGUAGE).
b.Place the cursor on ADDRESS and press ENTER to display the primary
address.
c.To change the address, use the cursor keys and the RANGE keys to display the
desired address, and press ENTER.
NOTEEach device on the bus must have a unique address. Typically, the computer uses
address 0 or 21.
Model 6517A Getting Started ManualRemote Operation3-5
5.Perform the following steps if you wish to check and/or change the language mode:
a.Place the cursor on LANGUAGE and press ENTER to display the language
options (SCPI or DDC). Cursor position indicates the present language mode.
b.Place the cursor on the desired language and press ENTER.
NOTEChanging the language mode causes the unit to exit from the MAIN MENU. If
you did not change the language, then use the EXIT key to back out of the menu
structure.
RS-232 interface selection and configuration
Perform the following steps to select, check, and/or change the RS-232 interface settings
for the Model 6517A:
NOTEThe RS-232 settings (baud rate, data bits, parity, and stop bits) of the
Model 6517A must match the RS-232 settings of the communications package
for your computer.
1.Press MENU to display the MAIN MENU.
2.Place the cursor (using and keys) on COMMUNICATION and press ENTER.
The interface options (GPIB and RS-232) will then be displayed.
3.Place the cursor on RS-232 and press ENTER to select the RS-232 interface.
NOTEIf the GPIB interface was previously selected, the unit will exit from the MAIN
MENU when you select RS-232. In that event, repeat steps 1, 2, and 3 to continue in the menu structure.
4.Perform the following steps if you wish to check and/or change the baud rate:
a.Place the cursor on BAUD and press ENTER to display the available baud
rates. Cursor position indicates the present baud rate setting. To retain the
present baud rate setting, press ENTER or EXIT.
b.To change the baud rate, place the cursor on the desired setting and press
ENTER.
5.Perform the following steps if you wish to check and/or change the number of data
bits:
a.Place the cursor on BITS and press ENTER to display the available number of
data bits (7 or 8). Cursor position indicates the present setting. To retain the
present setting, press ENTER or EXIT.
b.To change the number of data bits, place the cursor on the alternate selection
and press ENTER.
3-6Remote OperationModel 6517A Getting Started Manual
6.Perform the following steps if you wish to check and/or change parity:
a.Place the cursor on PARITY and press ENTER to display the parity options
(NONE, ODD or EVEN). Cursor position indicates the present setting. To
retain the present setting, press ENTER or EXIT.
b.To change parity, place the cursor on the desired selection and press ENTER.
7.Perform the following steps if you wish to check and/or change the number of stop
bits:
a.Place the cursor on STOP and press ENTER to display the available number of
stop bits (1 or 2). Cursor position indicates the present setting. To retain the
present setting, press ENTER or EXIT.
b.To change the number of stop bits, place the cursor on the alternate selection
and press ENTER.
8.Use the EXIT key to back out of the menu structure.
Common commands
Common commands are common to all IEEE-488 devices on the bus. The following information summarizes the common commands that are used most often. For complete
details, refer to Section 3 in the User’s Manual.
*CLS(clear status)
Clears all event registers and Error Queue. After clearing an event register, you can monitor the register for a bit to set, indicating that an event (such as the buffer becoming full)
has occurred.
*RCL <NRf>(recall)
Returns the instrument to the instrument setup saved at the specified memory location.
Example: To recall the setup saved at memory location 0, send *RCL 0.
*RST(reset)
Returns the instrument to the *RST defaults and places the instrument in the idle state
(ARM indicator off).
Model 6517A Getting Started ManualRemote Operation3-7
*SAV <NRf>(save)
Saves the instrument setup to the specified memory location (0 to 9). Example: To save the
setup to memory location 0, send *SAV 0.
*TRG(trigger)
When a trigger model control source is set for BUS, event detection is satisfied by sending
this bus trigger. For example, if instrument operation is waiting at the measure (trigger)
layer control source and it is programmed for BUS events, *TRG will provide the required
event resulting in a device action (measurement).
*WAI(wait to continue)
This delay is used to allow the *TRG or an initiate command (:INIT or :INIT:CONT
ON) to finish before processing any further commands. An INITiate command is not
considered finished until instrument operation returns to the idle state.
SCPI commands
In the Model 6517A, you are given access to control settings that are hidden on other
instruments. Because the instrument has more control points available, it requires more
commands than its counterparts to perform comparable tasks. To accommodate this, the
instrument incorporates the Standard Commands for Programmable Instruments (SCPI)
command set.
This introduction to the SCPI command set has three goals:
•Describe the syntax of SCPI commands. Included are descriptions of short forms
and default nodes, which help reduce the amount of data sent to the instrument.
•Provide some simple programs to perform commonly used tasks.
•Describe the SCPI commands used in the example programs so you can modify the
programs to suit your needs.
3-8Remote OperationModel 6517A Getting Started Manual
SCPI command syntax
Tree structure
SCPI commands are organized in a tree structure, similar to disk directories in computer
operating systems. Each subdirectory is called a subsystem. For example, part of the
SENSe1 subsystem is listed below and shown in Figure 3-2.
[SENSe[1]]
:DATA?
:FUNCtion <name>
:VOLTage
[:DC]
:RANGE
[:UPPer] <n>
:AUTO <Boolean> | ONCE
:REFerence <n>
:STATe <Boolean>
:ACQuire
Figure 3-2
Hierarchy of the example SENSe1 commands
SENSe1
:D ATA?:FUNCtion:VOLTage
[:DC]
:RANGe
:REFerence
:ACQuire[:UPPer]:AUTO:STATe
A command summary table is a way of documenting SCPI commands, but it does not
show complete command names. A complete command is formed by joining the components. For example, the complete :STATe command in the example is:
SENSe1:VOLTage[:DC]:REFerence:STATe
Note that square brackets are not part of the command; they indicate optional parts of the
command.
This hierarchical approach permits the same command to be used many times. For example, many subsystems contain a :STATe command, but each one is unique because the
complete command is unique. This is analogous to having a file named INDEX.TXT, for
example, in each directory of your computer's hard disk. Although the files have the same
name, they are unique because they are each in a different directory.
Model 6517A Getting Started ManualRemote Operation3-9
Long and short form commands
Every SCPI command has a short form, and most also have a long form. The notation used
in documentation shows the short form in upper case, with the remainder of the name,
which creates the long form, shown in lower case. There are no intermediate forms of the
command name. You must send the exact short or long form. However, you do not have to
use the mixed capitalization. The Model 6517A accepts commands in any combination of
upper and lower case. For example, all of the following are valid forms of the
With few exceptions, every SCPI command has a corresponding query. A command sets a
control point in the instrument; a query determines the present setting of the control point.
The query is simply the command name with a “?” attached.
Some commands are actions rather than control point settings. These commands have no
query form. For example,
SENSe1:VOLTage[:DC]:REFerence:ACQuire
is an action command, not a setting, and so has no query form.
There are some queries that have no corresponding command. For example,
SENSe1:DATA? causes the instrument to return the latest reading. Of course, there is no
corresponding command to send a reading value to the instrument.
Default nodes
SCPI uses the concept of default nodes. Consider the example command tree shown
previously in Figure 3-2. What is within square brackets is not necessary to send to the
instrument, but the instrument will accept it if you send it. Consider the :UPPer
command, which sets the measurement range. To set the Model 6517A to measure
15VDC, any of the following commands works:
These are shown in long form, but short forms could also be used.
3-10Remote OperationModel 6517A Getting Started Manual
Command syntax
Notice in the preceding examples that there is no colon character at the beginning of the
commands. A leading colon instructs the Model 6517A to interpret the command starting
at the root (highest level) of the command tree. Since the Model 6517A also starts at the
root each time you send it a new command, the leading colon is not needed (although the
instrument will accept it if you send it).
You can send multiple commands in a single message. You separate the commands with a
semicolon character. When the Model 6517A encounters a command following a
semicolon, it attempts to interpret the command starting at the level of the previous
command, unless you precede the second command with a colon. For example, either of
the following command strings programs the Model 6517A to the 20V range and uses 5V
as a relative value (with the REFerence commands):
volt[:dc]:rang 20;ref 5;ref:stat on
volt]:dc]:rang 20;:volt[:dc]:ref 5;:volt[:dc]:ref:stat on
The two command strings are treated identically by the Model 6517A. In the first string
when the instrument encounters ";ref 5", it notices the following:
•It is not the first command in the string.
•There is no leading colon on the command.
•The previous command was at the VOLTage[:DC] level.
Therefore, it interpret s the command as if it were at the VOLTage[:DC] level.
SCPI signal oriented commands
Signal oriented commands are used to acquire readings using a set of high-level instructions to control the measurement process. The two most commonly used commands are
:FETCh? and :MEASure?.
Details on all signal oriented commands are covered in Section 3 in the User’s Manual.
:FETCh?
This query command is used to request the latest post-processed reading. After sending
this command and addressing the Model 6517A to talk, the reading will be sent to the
computer. This command does not trigger a measurement, it simply requests the last available reading.
:MEASure[:<function>]?
In general, this command places the instrument in the “one-shot” measurement mode
(ARM indicator off), triggers a single measurement, and then performs a :FETCh?.
Model 6517A Getting Started ManualRemote Operation3-11
If you include the measurement function with this command, the instrument will first go to
the specified function and then perform the one-shot measurement and query, as follows:
:MEASure?Currently selected function
:MEASure:VOLTage[:DC]?Volts function
:MEASure:CURRent[:DC]?Amps function
:MEASure:RESistance?Ohms function
:MEASure:CHARge?Coulombs function
SCPI subsystem commands
Detailed information an all SCPI commands is covered in the User’s Manual. In this section, only the commands used for basic operation are summarized.
Defaults
:SYSTemSYSTem Subsystem
:PREsetSet the 6517A to the system present defaults. Some
of the selected defaults include: volts, continuous
triggers, normal speed (1.0 PLC), and auto range.
:POSetup <name>Select power-on setups: RST, PRESet, or SAV0
through SAV9. Instrument will power up to the
*RST or system present defaults, or one of the
*SAV0 – *SAV9 setups.
Fresh readings
[:SENSe[1]]SENSe Subsystem
:DATA:FRESh?Requests a “fresh” reading. This command will not
:CALCulate[1]CALCulate Subsystem
:DATA:FRESh?Requests a “fresh” calculated reading. When
request the same reading twice. If a new reading
has already been triggered, this command will wait
until the new reading is available.
CALC1 is enabled, sens:data:fres? is the
reading before calculation and
calc:data:fres? is the reading after calculation. When CALC1 is disabled, the readings are the
same.
3-12Remote OperationModel 6517A Getting Started Manual
Function configuration
[:SENSe[1]]SENSe Subsystem
:FUNCtion <name>Select measurement function:
<name> = 'VOLTage[:DC]' Volts function
'CURRent[:DC]' Amps function
'RESistance'Ohms function
'CHARge'Coulombs
function
:VOLTage[:DC]Path to configure volts:
:NPLC <n>Set speed: 0.01 to 10 PLC.
:AUTO <b>Enable or disable auto NPLC.
:RANGePath to configure measurement range:
[:UPPer] <n>Specify expected reading to select range.
:AUTO <n>Enable or disable auto range.
:REFerence <n>Specify reference (rel): -210 to +210.
:STATe <b>Enable or disable reference (rel).
:ACQuireUse input signal as reference (rel).
:DIGits <n>Specify measurement resolution.
:AUTO <b>Enable or disable auto resolution.
AVERagePath to control digital filter:
:TYPE <name>Select filter (NONE, SCALar or ADVanced).
:TCONtrol <name>Select averaging method (REPeat, or
MOVing).
:COUNt <n>Specify filter count (1 to 100).
:ADVancedPath to configure advanced filter:
:NTOLerance <n>Specify noise tolerance (0 to 100%).
[:STATe] <b>Enable or disable digital filter.
:MEDianPath to control median filter:
:RANK < n>Specify rank for filter (1 to 5).
[:STATe] <b>Enable or disable median filter.
:GUARd <b>Enable or disable guard.
:CURRent:DCPath to configure Amps:
(Volts commands)The commands for Volts (except :GUARd)
apply.
:DAMPing <b>Enable or disable damping.
Model 6517A Getting Started ManualRemote Operation3-13
:RESistancePath to configure Ohms:
(Volts commands)The commands for Volts (except :GUARd)
apply.
[:AUTO]Path to configure Auto V-Source Ohms:
:RANGePath to set measurement range:
[:UPPer] <n>Select range (0 to 100e18).
:AUTO <b>Enable or disable auto range.
:MANualPath to configure Manual V-Source Ohms:
:CRANgePath to set measurement range:
[:UPPer] <n>Select range (0 to 100e18).
:AUTO <b>Enable or disable auto range.
:OPERate <b>Enable or disable V-Source output.
:IREFerence <b>Enable or disable amps reference.
:DAMPing <b>Enable or disable damping.
:VSControl <name>Select ohms V-Source mode (MANual or
AUTO).
:MSELect <name>Select ohms type (NORMal or RESistivity).
:RESistivityPath to configure resistivity:
[:AMPLitude] <n>Specify voltage limit; 0 to 1000 (V).
:STATe <b>Enable or disable limit.
:MCONnect <b>Enable or disable V-Source LO to ammeter LO
connection.
:CURRentPath for current limit:
:RLIMitPath to control resistive current limit:
:STATe <b>Enable or disable resistive I-limit.
:LIMit <b>Path to check current compliance:
[STATe]? <b>Query state of current compliance.
Data store (Buffer)
:TRACeTRACe Subsystem
:ELEMents <name>Select reading elements :TSTamp, HUMidity,
CHANnel, ETEMperature, VSOurce, NONE.
:POINts <n>Specify buffer size.
:FEEDPath to control buffer:
:CONTrol <name>Select control mode and enable buffer: NEVer,
NEXT, ALWays, or PRETrigger.
:DATA?Read all readings in buffer.
NOTESee User’s Manual to use :PRETrigger.
Open/close channels and scan
:ROUTeROUTe Subsystem
:CLOSe <list>Close specified channel.
:STATe?Query the closed channel.
:OPEN <list>Open specified channel.
:OPEN:ALLOpen all channels.
:SCANPath to control scanning:
[:INTernal] <list>Specify internal scan list: 2 to 10 chans.
:EXTernal <list>Specify external scan list: 1 to 400 chans.
:SMEThod <name>Specify settling time for internal card; 0 to
:LSELect <name>Enable the specified scan: INTernal,
99999.9999 (sec.).
EXTernal or NONE.
Model 6517A Getting Started ManualRemote Operation3-15
Trigger model
Performing a system preset (:SYSTem:PRESet) configures the advanced trigger model for
typical instrument operation. After a system preset, many advanced operations can be
accomplished using the initiate commands, :ABORt, and the trigger (measure) layer commands.
:INITiate
[:IMMediate]Take the instrument out of idle (ARM indicator
on).
:CONTinuous <b>Enable or disable continuous initiation.
:ABORtReset trigger system. Instrument stays in idle if con-
tinuous initiation is disabled (off).
:TRIGgerPath to configure the advanced trigger layer:
:SOURce <name>Select control source: IMMediate, TIMer,
MANual, BUS, TLINk, EXTernal or HOLD.
:TIMer <n>Set timer interval (sec): 0.001 to 9999999.999.
:DELay <n>Set delay between measurements (sec) 0 to
999999.999.
:SYSTem
:MACRo
:TRIGgerPath to configure basic triggering.
[:EXECute]Select basic triggering.
:MODE <name>Specify trigger mode (CONTinuous or ONE-
:TLINe <NRf>Specify TLINK line; 1 to 6.
DLEakageDiode leakage test path:
:STARt <NRf>Specify start voltage; -1000 to 1000.
:STOP <NRf>Specify stop voltage; -1000 to 1000.
:STEP <NRf>Specify step voltage; -1000 to 1000.
:MDELay <NRf>Specify measure delay; 0 to 99999.9 (sec.).
:CLEakageCapacitor leakage test path:
:SVOLtage <NRf>Specify bias voltage (-1000 to 1000).
:STIME <NRf>Specify bias time; 0 to 99999.9 (sec.).
:DTIMe <NRf>Specify discharge time; 0 to 9999.9 (sec.).
:CIResistanceCable insulation resistance test path:
:SVOLtage <NRf>Specify bias voltage; -1000 to 1000.
:STIME <NRf>Specify bias time; 0 to 99999.9 (sec.).
:RVCoefficientResistor voltage coefficient test path:
:SVOLtage[1] <NRf>Specify source voltage 1; -1000 to 1000.
:MDELay[1] <NRf>Specify measure delay 1; 0 to 99999.0 (sec.).
:SVOLtage2 <NRf>Specify source voltage 2; -1000 to 1000.
:MDELay2 <NRf>Specify measure delay 2; 0 to 99999.9 (sec.).
:SRESistivitySurface resistivity test path:
:PDTime <NRf>Specify pre-discharge time; 0 to 99999.9 (sec.).
:SVOLtage <NRf>Specify bias voltage; -1000 to 1000.
:STIME <NRf>Specify bias time; 0 to 99999.9 (sec.).
:MVOLtage <NRf>Specify measure voltage; -1000 to 1000.
:MTIMe <NRf>Specify measure time; 0 to 99999.9 (sec.).
:DTIMe <NRf>Specify discharge time; 0 to 99999.9 (sec.).
:VRESistivityVolume resistivity test path:
:PDTime <NRf>Specify pre-discharge time; 0 to 99999.9 (sec.).
:SVOLtage <NRf>Specify bias voltage; -1000 to 1000.
:STIME <NRf>Specify bias time; 0 to 99999.9 (sec.).
:MVOLtage <NRf>Specify measure voltage; -1000 to 1000.
:MTIMe <NRf>Specify measure time; 0 to 99999.9 (sec.).
:DTIMe <NRf>Specify discharge time; 0 to 99999.9 (sec.)
Model 6517A Getting Started ManualRemote Operation3-17
:SIResistanceSurface Insulation Resistance test path:
:SVOLtage <NRf>Specify bias voltage; -1000 to 1000.
:STIME <NRf>Specify bias time; 0 to 99999.9 (sec.).
:MVOLtage <NRf>Specify measure voltage; -1000 to 1000.
:MTIMe <NRf>Specify measure time; 0 to 99999.9 (sec.).
:SQSWeepSquare wave sweep test path:
:HLEVel <NRf>Specify high level voltage; -1000 to 1000.
:HTIMe <NRf>Specify high level time; 0 to 99999.9 (sec.).
:LLEVel <NRf>Specify low level voltage; -1000 to 1000.
:LTIMe <NRf>Specify low level time; 0 to 99999.9 (sec.).
:COUNt <NRf>Specify number cycles.
:STSWeepStaircase sweep test path:
:STARt <NRf>Specify start voltage; -1000 to 1000.
:STOP <NRf>Specify stop voltage; -1000 to 1000.
:STEP <NRf>Specify step voltage; -1000 to 1000.
:STIME <NRf>Specify step time; 0 to 99999.9 (sec.).
Status register
The status register structure of the Model 6517A lets you monitor and act upon numerous
events that occur. Many programming decisions can be made by monitoring the Measurement Event Register and the Operation Event Register. See the User’s Manual for details
of the status registers.
:STATusSTATus Subsystem.
:MEASurementPath for measurement status registers:
[:EVENt]?Use to read the Measurement Event Register.
:OPERationPath for operation status registers:
[:EVENt]?Use to read the Operation Event Register.
When an event register is read, a decimal value is sent to the computer. The binary equivalent determines which bits in the register are set. For example, a decimal value of 33 indicates that bits B0 and B5 are set. An event register is cleared when it is read. Sending
*CLS clears all event registers.
Some of the more useful bits of these event registers are summarized as follows:
Bit B0 set = Reading OverflowBit B9 set = Calculating
Bit B5 set = Reading AvailableBit B10 set = Idle
Bit B7 set = Buffer AvailableBit B11 set = Sequence Test Running
Bit B8 set = Buffer Half Full
Bit B9 set = Buffer Full
Bit B14 set = V-Source Compliance
3-18Remote OperationModel 6517A Getting Started Manual
Program examples
All examples presume QuickBASIC version 4.5 or higher and a Keithley KPC-488.2 or
CEC IEEE-488 interface card with CEC driver version 2.11 or higher, with the Model
6517A at address 27 on the IEEE-488 bus.
Changing function and range
The Model 6517A has independent controls for each of its measurement functions. This
means, for example, that autorange can be turned on for volts while leaving it off for amps.
Another difference is in the parameter to the range command. In our older instruments, a
single number was used to denote each range. The parameter of the SCPI RANGe command is given as “the maximum value to measure.” The instrument interprets this parameter and goes to the appropriate range. When you query the range with RANGe? the
instrument sends back the full-scale value of its present range.
The following example program illustrates changing function and range. It sets the range
for several functions, then takes readings on each of those functions.
Note that the Model 6517A rounds the range parameter to an integer before choosing the
appropriate range. Sending VOLTage:DC:RANGe 20.45 will set the Model 6517A to
the 20V range.
Model 6517A Getting Started ManualRemote Operation3-19
'Example program to demonstrate changing function and range,
'taking readings on various functions
'For QuickBASIC 4.5 and KPC-488.2/CEC interface card
'Edit the following line to where the QuickBASIC
'libraries are on your computer
'$INCLUDE: 'c:\qb45\ieeeqb.bi'
'Initialize the interface as address 21
CALL initialize(21, 0)
'Reset the SENSe1 subsystem settings, along with the trigger
'model, each READ? will cause one trigger
CALL SEND(27, "*rst", status%)
'Set range for each function to measure
CALL SEND(27, "volt:dc:rang 10", status%)
CALL SEND(27, "curr:dc:rang 0.003", status%)
CALL SEND(27, "res:rang 10e6", status%)
'Switch to volts and take reading
CALL SEND(27, "func 'volt:dc';:read?", status%)
reading$ = SPACE$(80)
CALL ENTER(reading$, length%, 27, status%)
PRINT reading$
'Switch to current and take reading
CALL SEND(27, "func 'curr:dc';:read?", status%)
reading$ = SPACE$(80)
CALL ENTER(reading$, length%, 27, status%)
PRINT reading$
'Switch to 2-wire ohms and take reading
CALL SEND(27, "func 'res';:read?", status%)
reading$ = SPACE$(80)
CALL ENTER(reading$, length%, 27, status%)
PRINT reading$
One-shot triggering
Our older instruments generally have two types of triggering: one-shot and continuous. In
one-shot, each activation of the selected trigger source causes one reading. In continuous,
the instrument is idle until the trigger source is activated, at which time it begins taking
readings at a specified rate. Typical trigger sources for non-SCPI instruments are:
•IEEE-488 talk
•IEEE-488 Group Execute Trigger (GET)
•“X” command
•External trigger (rear panel BNC)
3-20Remote OperationModel 6517A Getting Started Manual
Arming the instrument to respond to triggers is implicit in the non-SCPI instruments. Simply sending a command to a non-SCPI instrument to change any of the trigger controls
causes the instrument to arm itself for triggers.
The SCPI trigger model implemented in the Model 6517A gives you:
•Explicit control over the trigger source (the TRIGger subsystem).
•A two-level control for arming the instrument for triggers.
•A way for completely disabling triggers.
Changing any of the settings in the TRIGger subsystem does not automatically arm the
Model 6517A for triggers.
The following program sets up the Model 6517A to take one reading each time it receives
an external trigger pulse.
'Example program to demonstrate one-shot external triggering
'For QuickBASIC 4.5 and KPC-488.2/CEC interface card
'Edit the following line to where the QuickBASIC
'libraries are on your computer
'$INCLUDE: 'c:\qb45\ieeeqb.bi'
'Initialize the interface as address 21
CALL initialize(21, 0)
'Reset controls in INIT, ARM;LAY1, ARM:LAY2, and TRIG subsystems
'and put trigger model in IDLE state
CALL SEND(27, "*rst", status%)
CALL SEND(27, "trig:sour ext;coun inf", status%)
'start everything
CALL SEND(27, "init", status%)
After the Model 6517A receives the INITiate command, it stops in the TRIGger layer
of the trigger model, waiting for a pulse on the external trigger jack. Each time a pulse
arrives on the external trigger jack, the Model 6517A takes one reading. Because
TRIGger:COUNt has been set to INFinity, the trigger model never exits from the
TRIGger layer. You can send the ABORt command to put the trigger model in the idle state, disabling triggers until another INITiate command is sent.
Model 6517A Getting Started ManualRemote Operation3-21
Continuous triggering #1
The following example program sets up the Model 6517A to take readings as fast as it can
once it receives an external trigger. The actual reading rate will depend upon other factors,
such as A/D integration time, autorange on/off, etc.
'Example program to demonstrate continuous triggering
'For QuickBASIC 4.5 and KPC-488.2/CEC interface card
'Edit the following line to where the QuickBASIC
'libraries are on your computer
'$INCLUDE: 'c:\qb45\ieeeqb.bi'
'Initialize the interface as address 21
CALL initialize(21, 0)
'Reset controls in INIT, ARM;LAY1, ARM:LAY2, and TRIG subsystems
'and put trigger model in IDLE state
CALL SEND(27, "*rst", status%)
After the Model 6517A receives the INITiate command, it stops in ARM:LAYer2 of
the trigger model, waiting for a pulse on the external trigger jack. After the external trigger
signal occurs, the Model 6517A moves to the TRIGger layer. Since TRIGger:SOURce
is set to IMMediate, a reading is triggered immediately, with a subsequent reading triggered as soon as the previous one is finished.
3-22Remote OperationModel 6517A Getting Started Manual
Continuous triggering #2
The following example program sets up the Model 6517A to take readings continuously
after an external trigger is received. The trigger rate is set to one reading every 50ms.
'Example program to demonstrate continuous triggering
'at a specified rate
'For QuickBASIC 4.5 and KPC-488.2/CEC interface card
'Edit the following line to where the QuickBASIC
'libraries are on your computer
'$INCLUDE: 'c:\qb45\ieeeqb.bi'
'Initialize the interface as address 21
CALL initialize(21, 0)
'Reset controls in INIT, ARM;LAY1, ARM:LAY2, and TRIG subsystems
'and put trigger model in IDLE state
CALL SEND(27, "*rst", status%)
After the Model 6517A receives the INITiate command, it stops in ARM:LAYer2 of
the trigger model, waiting for a pulse on the external trigger jack. After the external trigger
signal occurs, the Model 6517A moves to the TRIGger layer. Since TRIGger:SOURce
is set to TIMer, a reading is triggered immediately, with a subsequent reading every 50ms.
Because TRIGger:COUNt has been set to infinity, the trigger model never exits from the
TRIGger layer.
Model 6517A Getting Started ManualRemote Operation3-23
Generating SRQ on buffer full
When your program must wait until the Model 6517A has completed an operation, it is
more efficient to program the Model 6517A to assert the IEEE-488 SRQ line when it is
finished, rather than repeatedly serial polling the instrument. An IEEE-488 controller will
typically address the instrument to talk, then unaddress it, each time it performs a serial
poll. Repeated polling of the Model 6517A will generally reduce its overall reading
throughput. Therefore, use the srq%() function call.
The Model 6517A provides a status bit for nearly every operation it performs. It can be
programmed to assert the IEEE-488 SRQ line whenever a status bit becomes true or false.
The IEEE-488 controller (your computer) can examine the state of the SRQ line without
performing a serial poll, thereby detecting when the 6517A has completed its task without
interrupting it in the process.
The following example program segment sets up the Model 6517A to assert SRQ when
the reading buffer has completely filled, then arms the reading buffer, initiates readings,
and waits for the Model 6517A to indicate that the buffer is full.
This is not a complete program. Not shown are the commands to configure the trigger
model and the reading buffer (see the next example). The example shown here can be
modified for any event in the Model 6517A status reporting system.
'Reset STATus subsystem (not affected by *RST)
CALL SEND(27, "stat:pres;*cls", status%)
WaitSRQ:
IF (NOT(srq%)) THEN GOTO WaitSRQ
CALL SPOLL(27, poll%, status%)
IF (poll% AND 64)=0 THEN GOTO WaitSRQ
Notice that after the program has detected an asserted SRQ line, it serial polls the
Model 6517A to determine if it is the device requesting service. This is necessary for two
reasons:
•Serial polling the Model 6517A causes it to quit asserting the SRQ line.
•In test systems that have more than one IEEE-488 instrument programmed to assert
SRQ, your program must determine which instrument is actually requesting
service.
Once an event register has caused a service request, it cannot cause another service request
until you clear it by reading it (in this case using STATus:MEASurement[:EVENt]?)
or by sending the *CLS command.
3-24Remote OperationModel 6517A Getting Started Manual
Storing readings in buffer
The reading buffer in the Model 6517A is flexible and capable. It has three controls, which
are found in the TRACe subsystem. There are commands to control:
•The size of the buffer (in readings).
TRACe:POINts <NRf>
•Whether or not extra data is stored with each reading (e.g., channel number, timestamp). Storing extra data reduces the maximum size of the buffer.
TSTamp, HUMidity, CHANnel,
ETEMperature, VSOurce or NONE.
•Select buffer control mode.
TRACe:FEED:CONTrol NEVerimmediately stop storing readings
TRACe:FEED:CONTrol NEXTstart now, stop when buffer is full
TRACe:FEED:CONTrol ALWaysstart now, never stop
TRACe:FEED:CONTrol PRETriggerstart now, stop when pretrigger is satisfied
The following example program sets up the Model 6517A to take 20 readings as fast as it
can into the buffer, then reads the data back after the buffer has filled. The readings will be
stored with the timestamp, etc., but the program reads back only the reading values and
timestamp.
Model 6517A Getting Started ManualRemote Operation3-25
'Example program to demonstrate the reading buffer
'For QuickBASIC 4.5 and KPC-488.2/CEC interface card
'Edit the following line to where the QuickBASIC
'libraries are on your computer
'$INCLUDE: 'c:\qb45\ieeeqb.bi'
'Initialize the interface as address 21
CALL initialize(21, 0)
'Reset controls in INIT, ARM;LAY1, ARM:LAY2, and TRIG subsystems
'and put trigger model in IDLE state
CALL SEND(27, "*rst", status%)
3-26Remote OperationModel 6517A Getting Started Manual
Taking readings with the scanner card
The Models 6521 and 6522 are optional 10-channel scanner cards for the Model 6517A
Multimeter. Only one channel can be closed at a time. If you close a channel while another
is already closed, the first one opens with break-before-make operation.
You can use the scanner card two ways. One is to issue a command to close a particular
channel before sending other commands to take readings. The other way is to program the
scan list, and let the meter take care of closing a channel before taking a reading.
The following example program measures volts on channel 1, amps on channel 2, and
resistance on channel 3, using the ROUTe:CLOSe command.
'Example program to demonstrate taking readings on different
'scanner channels
'For QuickBASIC 4.5 and KPC-488.2/CEC interface card
'Edit the following line to where the QuickBASIC
'libraries are on your computer
'$INCLUDE: 'c:\qb45\ieeeqb.bi'
'Initialize the interface as address 21
CALL initialize(21, 0)
'Reset controls in INIT, ARM;LAY1, ARM:LAY2, and TRIG subsystems
'and put trigger model in IDLE state, set function to volts
CALL SEND(27, "*rst", status%)
The following example program sets up the Model 6517A using a scan list to measure DC
voltage on channels 1, 2, and 3. The meter takes ten sets of readings, with each set spaced
15 seconds apart, and each of the three readings in each group taken as fast as possible.
Model 6517A Getting Started ManualRemote Operation3-27
The Model 6517A stores the readings in the buffer, and asserts SRQ when the buffer is
full. The program waits for the SRQ, then reads the readings from the buffer.
'Example program to demonstrate using the scan list
'For QuickBASIC 4.5 and KPC-488.2/CEC interface card
'Edit the following line to where the QuickBASIC
'libraries are on your computer
'$INCLUDE: 'c:\qb45\ieeeqb.bi'
'Initialize the interface as address 21
CALL initialize(21, 0)
'Reset controls in INIT, ARM;LAY1, ARM:LAY2, and TRIG subsystems
'and put trigger model in IDLE state, set function to DCV
CALL SEND(27, "*rst", status%)
'Reset STATus subsystem (not affected by *RST)
CALL SEND(27, "stat:pres;*cls", status%)
'TRACe subsystem is not affected by *RST
CALL SEND(27, "trac:poin 30;elem none", status%)
CALL SEND(27, "trac:feed sens1;feed:coun next", status%)
' now the buffer is armed
3-28Remote OperationModel 6517A Getting Started Manual
Test Sequence — staircase sweep
The following program performs a staircase sweep. Using the source voltage measure current (FVMI) method, this test will measure the current through a DUT (see Figure 2-8) at
eleven voltage steps (0V through 10V). The eleven readings are stored in the buffer and
displayed on the computer CRT at the conclusion of the test.
Model 6517A Getting Started ManualRemote Operation3-29
WaitSRQ
IF (NOT (srq%)) THEN GOTO WaitSRQ
CALL spoll(27, poll%, status%)
If (poll% AND 64) = 0 THEN GOTO WaitSRQ
'Dump buffer readings to computer CRT:
CALL send(27, ":TRACE:DATA?", status%)
CALL enter(DATA1$, length%, 27, status%)
A = 1
FOR I = 1 TO 11
r$ = MID$(DATA!$, A, 13)
PRINT r$
A = A + 14
NEXT I
END
4
Specs and Accessories
4-2 Specifications
VOLTS
VOLTSACCURACYTEMPERATURE
DIGIT18°–28°C0°–18°C & 28°–50°C
5½
RANGERESOLUTION±(%rdg+counts)±(%rdg+counts)/°C
2 V10 µV0.025 + 40.003 + 2
20 V 100 µV0.025 + 30.002 + 1
200 V 1 mV0.06 + 30.002 + 1
Note:
1
When properly zeroed, 5½ digit, 1 PLC (power line cycle), median
filter on, digital filter = 10 readings.
NMRR: 60dB on 2V, 20V, >55dB on 200V, at 50Hz or 60Hz ±0.1%.
CMRR: >120dB at DC, 50Hz or 60Hz.
INPUT IMPEDANCE: >200TΩ in parallel with 20pF, < 2pF guarded (10MΩ with zero check on).
SMALL SIGNAL BANDWIDTH AT PREAMP OUTPUT: Typically 100kHz (–3dB).
(1 Year)
1
COEFFICIENT
AMPS
AMPSACCURACYTEMPERATURE
5½
DIGIT18°–28°C0°–18°C & 28°–50°C
A, fA=10
2
2
–15
A.
RANGERESOLUTION±(%rdg+counts)±(%rdg+counts)/°C
20 pA 100 aA
200 pA 1 fA
2 nA10 fA0.2 + 300.1+ 2
20 nA 100 fA0.2 + 50.03 + 1
200 nA 1 pA0.2 + 50.03 + 1
2 µA10 pA0.1 + 100.005 + 2
20 µA 100 pA0.1 + 50.005 + 1
200 µA 1 nA0.1 + 50.005 + 1
2 mA10 nA0.1 + 100.008 + 2
20 mA 100 nA0.1 + 50.008 + 1
Note:
1
When properly zeroed, 5½ digit, 1 PLC (power line cycle), median
filter on, digital filter = 10 readings.
2
–18
aA =10
INPUT BIAS CURRENT: <3fA at T
INPUT BIAS CURRENT NOISE: <750aA p-p (capped input), 0.1Hz to 10Hz bandwidth, damping on. Digital filter = 40
readings.
INPUT VOLTAGE BURDEN at T
<20µV on 20pA, 2nA, 20nA, 2µA, 20µA ranges.
<100µV on 200pA, 200nA, 200µA ranges.
<2mV on 2mA range.
<4mV on 20mA range.
TEMPERATURE COEFFICIENT OF INPUT VOLTAGE BURDEN: <10µV/°C on pA, nA, µA ranges.
PREAMP SETTLING TIME (to 10% of final value): 2.5s typical on pA ranges, damping off, 4s typical on pA ranges damping
on, 15ms on nA ranges, 2ms on µA and mA ranges.
NMRR: >95dB on pA, 60dB on nA, µA, and mA ranges at 50Hz or 60Hz ±0.1%.
1
(1 Year)
1 + 300.1+ 5
1 + 50.1+ 1
. Temperature coefficient = 0.5fA/°C.
CAL
±1°C:
CAL
COEFFICIENT
COULOMBS
COULOMBSACCURACYTEMPERATURE
DIGIT18°–28°C0°–18°C & 28°–50°C
5½
RANGERESOLUTION±(%rdg+counts)±(%rdg+counts)/°C
2 nC10 fC0.4 + 50.04 + 3
20 nC100 fC0.4 + 50.04 + 1
200 nC1 pC0.4 + 50.04 + 1
2 µC10 pC0.4 + 50.04 + 1
Note:
1
Charge acquisition time must be <1000s, derate 1% for each
additional 10,000s.
2
When properly zeroed, 5½ digit, 1 PLC (power line cycle), median
filter on, digital filter = 10 readings.
INPUT BIAS CURRENT: <4fA at T
1,2
(1 Year)
. Temperature coefficient = 0.5fA/°C.
CAL
COEFFICIENT
Specifications 4-3
OHMS: Normal Method
TEMPERATURE
COEFFICIENT
1
5½ DIGIT (10–100% Range)0
RANGE LUTION±(% rdg+counts) ±(% rdg+counts) VOLTS RANGE
2MΩ10 Ω0.125 + 10.01 + 1 40 V 200 µA
20MΩ 100 Ω0.125 + 10.01 + 1 40 V20 µA
200MΩ 1kΩ0.15 + 10.015 + 1 40 V2 µA
2GΩ10 kΩ0.225 + 10.035 + 1 40 V 200 nA
20 GΩ 100 kΩ0.225 + 10.035 + 1 40 V20 nA
200 GΩ 1MΩ0.35 + 10.110 + 1 40 V2 nA
2TΩ10MΩ0.35 + 10.110 + 1400 V2 nA
20 T Ω 100MΩ1.025 + 10.105 + 1400 V 200 pA
200 TΩ 1GΩ1.15 + 10.125 + 1400 V20 pA
RESO-18
ACCURACY
°–28°C (1 Yr.)28°–50°CTESTAMPS
(10–100% Range)
°–18°C &
Note:
1
Specifications are for auto V-source ohms, when properly zeroed, 5½ digit, 1 PLC, median filter on, digital filter = 10
readings. If user selectable voltage is required, use manual mode. Manual mode displays resistance (up to 1018Ω) calculated
from measured current. Accuracy is equal to accuracy of V-source plus accuracy of selected Amps range.
PREAMP SETTLING TIME: Add voltage source settling time to preamp settling time in Amps specification.
OHMS: Alternating Polarity Method
Using Keithley 8002A or 8009 fixture
REPEATABILITY: ∆I
ACCURACY: (V
SRC
where:∆IBG is a measured, typical background current noise from the sample and fixture over the measurement time
programmed, under normal measurement conditions
(1 PLC, same range, filters off, etc.)
V
is the alternating polarity voltage used
ALT
V
Err is the accuracy (in volts) of the voltage source using V
SRC
I
Err is the accuracy (in amps) of the ammeter using V
MEAS
With conditions: ∆I
Note that the measured resistance is affected by the series and parallel resistance of the test fixture.
BG *
Err + I
BG *
R/V
+ 0.1% (1σ) (instrument temp. constant ±1°C).
ALT
Err
MEAS
R)/V
*
ALT
as the setting
ALT
/R as the rdg
R/V
< 10%; capacitance of sample <10nF in parallel with measured R
DISPLAY: 6½-digit vacuum fluorescent multiline.
OVERRANGE INDICATION: Display reads “OVERFLOW.”
RANGING: Automatic or manual.
CONVERSION TIME: Selectable 0.01 PLC to 10 PLC.
PROGRAMS: Provide front panel access to IEEE address, choice of engineering units or scientific notation, and digital
calibration.
MAXIMUM INPUT: 250V peak, DC to 60Hz sine wave; 10s per minute maximum on mA ranges.
MAXIMUM COMMON MODE VOLTAGE (DC to 60Hz sine wave): Electrometer, 500V peak; V Source, 750V peak.
ISOLATION (Meter COMMON to chassis): Typically 10
INPUT CONNECTOR: Three lug triaxial on rear panel.
2V ANALOG OUTPUT: 2V for full range input. Non-inverting in Volts mode. Output impedance 10kΩ.
PREAMP OUTPUT: Provides a guard output for Volts measurements. Can be used as an inverting output or with external
feedback in Amps and Coulombs modes.
EXTERNAL TRIGGER: TTL compatible External Trigger and Electrometer Complete.
GUARD: Switchable voltage guard available.
DIGITAL I/O AND TRIGGER LINE: Available, see manual for usage.
EMI/RFI: Meets VDE-0871 and FCC Class B limits.
EMC: Conforms to European Union Directive 89/336/EEC.
SAFETY: Conforms to European Union Directive 73/23/EEC.
TEST SEQUENCES: Alternating Polarity Hi-R, Device-Characterization (Diode, Capacitor, Cable, Resistor), Resistivity,
0.01 PLC, digital filters off, front panel off, temperature + RH off.
2
1.00 PLC, digital filters off, temperature + RH off.
3
Binary transfer mode.
DIGITAL FILTER: Median and averaging.
ENVIRONMENT:
Operating: 0°–50°C; relative humidity 70% non-condensing, up to 35°C.
Storage: –25° to +65°C.
WARM-UP: 1 hour to rated accuracy (see manual for recommended procedure).
POWER: 105–125V or 210–250V (external switch selected), 90–110V (internal modification required), 50–60Hz, 50VA.
PHYSICAL:
Case Dimensions: 90mm high × 214mm wide × 369mm deep
(3½ in. × 8½ in. × 14½ in.).
Working Dimensions: From front of case to rear including power cord and IEEE-488 connector: 15.5 inches.
Net Weight: <4.6 kg (<10.1 lbs).
Shipping Weight: <9.5 kg (<21 lbs).
ACCESSORIES SUPPLIED:
Model 237-ALG-2 Low Noise Triax Cable,
3-slot Triax to Alligator Clips 2m (6.6 ft)
Model 8607Safety High Voltage Dual Test Leads
Model 6517-TPThermocouple Input Lead
Model CS-459Interlock Connector
10
Ω in parallel with 500pF.
Specifications subject to change without notice.
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